4061c3346e
Fixes: 074dbce5fc "migration: New migrate and migrate-incoming argument 'channels'"
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2586 lines
84 KiB
Python
2586 lines
84 KiB
Python
# -*- Mode: Python -*-
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# vim: filetype=python
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#
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##
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# = Migration
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##
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{ 'include': 'common.json' }
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{ 'include': 'sockets.json' }
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##
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# @MigrationStats:
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#
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# Detailed migration status.
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#
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# @transferred: amount of bytes already transferred to the target VM
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#
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# @remaining: amount of bytes remaining to be transferred to the
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# target VM
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#
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# @total: total amount of bytes involved in the migration process
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#
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# @duplicate: number of duplicate (zero) pages (since 1.2)
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#
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# @skipped: number of skipped zero pages. Always zero, only provided for
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# compatibility (since 1.5)
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#
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# @normal: number of normal pages (since 1.2)
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#
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# @normal-bytes: number of normal bytes sent (since 1.2)
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#
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# @dirty-pages-rate: number of pages dirtied by second by the guest
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# (since 1.3)
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#
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# @mbps: throughput in megabits/sec. (since 1.6)
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#
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# @dirty-sync-count: number of times that dirty ram was synchronized
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# (since 2.1)
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#
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# @postcopy-requests: The number of page requests received from the
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# destination (since 2.7)
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#
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# @page-size: The number of bytes per page for the various page-based
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# statistics (since 2.10)
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#
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# @multifd-bytes: The number of bytes sent through multifd (since 3.0)
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#
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# @pages-per-second: the number of memory pages transferred per second
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# (Since 4.0)
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#
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# @precopy-bytes: The number of bytes sent in the pre-copy phase
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# (since 7.0).
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#
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# @downtime-bytes: The number of bytes sent while the guest is paused
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# (since 7.0).
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#
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# @postcopy-bytes: The number of bytes sent during the post-copy phase
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# (since 7.0).
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#
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# @dirty-sync-missed-zero-copy: Number of times dirty RAM
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# synchronization could not avoid copying dirty pages. This is
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# between 0 and @dirty-sync-count * @multifd-channels. (since
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# 7.1)
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#
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# Features:
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#
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# @deprecated: Member @skipped is always zero since 1.5.3
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#
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# Since: 0.14
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#
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##
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{ 'struct': 'MigrationStats',
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'data': {'transferred': 'int', 'remaining': 'int', 'total': 'int' ,
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'duplicate': 'int',
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'skipped': { 'type': 'int', 'features': [ 'deprecated' ] },
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'normal': 'int',
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'normal-bytes': 'int', 'dirty-pages-rate': 'int',
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'mbps': 'number', 'dirty-sync-count': 'int',
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'postcopy-requests': 'int', 'page-size': 'int',
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'multifd-bytes': 'uint64', 'pages-per-second': 'uint64',
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'precopy-bytes': 'uint64', 'downtime-bytes': 'uint64',
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'postcopy-bytes': 'uint64',
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'dirty-sync-missed-zero-copy': 'uint64' } }
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##
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# @XBZRLECacheStats:
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#
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# Detailed XBZRLE migration cache statistics
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#
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# @cache-size: XBZRLE cache size
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#
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# @bytes: amount of bytes already transferred to the target VM
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#
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# @pages: amount of pages transferred to the target VM
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#
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# @cache-miss: number of cache miss
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#
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# @cache-miss-rate: rate of cache miss (since 2.1)
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#
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# @encoding-rate: rate of encoded bytes (since 5.1)
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#
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# @overflow: number of overflows
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#
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# Since: 1.2
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##
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{ 'struct': 'XBZRLECacheStats',
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'data': {'cache-size': 'size', 'bytes': 'int', 'pages': 'int',
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'cache-miss': 'int', 'cache-miss-rate': 'number',
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'encoding-rate': 'number', 'overflow': 'int' } }
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##
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# @CompressionStats:
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#
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# Detailed migration compression statistics
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#
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# @pages: amount of pages compressed and transferred to the target VM
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#
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# @busy: count of times that no free thread was available to compress
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# data
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#
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# @busy-rate: rate of thread busy
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#
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# @compressed-size: amount of bytes after compression
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#
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# @compression-rate: rate of compressed size
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#
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# Since: 3.1
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##
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{ 'struct': 'CompressionStats',
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'data': {'pages': 'int', 'busy': 'int', 'busy-rate': 'number',
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'compressed-size': 'int', 'compression-rate': 'number' } }
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##
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# @MigrationStatus:
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#
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# An enumeration of migration status.
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#
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# @none: no migration has ever happened.
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#
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# @setup: migration process has been initiated.
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#
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# @cancelling: in the process of cancelling migration.
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#
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# @cancelled: cancelling migration is finished.
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#
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# @active: in the process of doing migration.
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#
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# @postcopy-active: like active, but now in postcopy mode. (since
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# 2.5)
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#
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# @postcopy-paused: during postcopy but paused. (since 3.0)
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#
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# @postcopy-recover: trying to recover from a paused postcopy. (since
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# 3.0)
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#
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# @completed: migration is finished.
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#
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# @failed: some error occurred during migration process.
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#
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# @colo: VM is in the process of fault tolerance, VM can not get into
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# this state unless colo capability is enabled for migration.
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# (since 2.8)
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#
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# @pre-switchover: Paused before device serialisation. (since 2.11)
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#
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# @device: During device serialisation when pause-before-switchover is
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# enabled (since 2.11)
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#
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# @wait-unplug: wait for device unplug request by guest OS to be
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# completed. (since 4.2)
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#
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# Since: 2.3
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##
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{ 'enum': 'MigrationStatus',
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'data': [ 'none', 'setup', 'cancelling', 'cancelled',
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'active', 'postcopy-active', 'postcopy-paused',
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'postcopy-recover', 'completed', 'failed', 'colo',
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'pre-switchover', 'device', 'wait-unplug' ] }
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##
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# @VfioStats:
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#
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# Detailed VFIO devices migration statistics
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#
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# @transferred: amount of bytes transferred to the target VM by VFIO
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# devices
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#
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# Since: 5.2
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##
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{ 'struct': 'VfioStats',
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'data': {'transferred': 'int' } }
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##
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# @MigrationInfo:
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#
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# Information about current migration process.
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#
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# @status: @MigrationStatus describing the current migration status.
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# If this field is not returned, no migration process has been
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# initiated
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#
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# @ram: @MigrationStats containing detailed migration status, only
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# returned if status is 'active' or 'completed'(since 1.2)
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#
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# @disk: @MigrationStats containing detailed disk migration status,
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# only returned if status is 'active' and it is a block migration
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#
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# @xbzrle-cache: @XBZRLECacheStats containing detailed XBZRLE
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# migration statistics, only returned if XBZRLE feature is on and
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# status is 'active' or 'completed' (since 1.2)
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#
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# @total-time: total amount of milliseconds since migration started.
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# If migration has ended, it returns the total migration time.
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# (since 1.2)
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#
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# @downtime: only present when migration finishes correctly total
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# downtime in milliseconds for the guest. (since 1.3)
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#
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# @expected-downtime: only present while migration is active expected
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# downtime in milliseconds for the guest in last walk of the dirty
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# bitmap. (since 1.3)
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#
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# @setup-time: amount of setup time in milliseconds *before* the
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# iterations begin but *after* the QMP command is issued. This is
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# designed to provide an accounting of any activities (such as
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# RDMA pinning) which may be expensive, but do not actually occur
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# during the iterative migration rounds themselves. (since 1.6)
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#
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# @cpu-throttle-percentage: percentage of time guest cpus are being
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# throttled during auto-converge. This is only present when
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# auto-converge has started throttling guest cpus. (Since 2.7)
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#
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# @error-desc: the human readable error description string. Clients
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# should not attempt to parse the error strings. (Since 2.7)
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#
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# @postcopy-blocktime: total time when all vCPU were blocked during
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# postcopy live migration. This is only present when the
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# postcopy-blocktime migration capability is enabled. (Since 3.0)
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#
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# @postcopy-vcpu-blocktime: list of the postcopy blocktime per vCPU.
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# This is only present when the postcopy-blocktime migration
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# capability is enabled. (Since 3.0)
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#
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# @compression: migration compression statistics, only returned if
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# compression feature is on and status is 'active' or 'completed'
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# (Since 3.1)
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#
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# @socket-address: Only used for tcp, to know what the real port is
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# (Since 4.0)
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#
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# @vfio: @VfioStats containing detailed VFIO devices migration
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# statistics, only returned if VFIO device is present, migration
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# is supported by all VFIO devices and status is 'active' or
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# 'completed' (since 5.2)
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#
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# @blocked-reasons: A list of reasons an outgoing migration is
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# blocked. Present and non-empty when migration is blocked.
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# (since 6.0)
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#
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# @dirty-limit-throttle-time-per-round: Maximum throttle time
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# (in microseconds) of virtual CPUs each dirty ring full round,
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# which shows how MigrationCapability dirty-limit affects the
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# guest during live migration. (Since 8.1)
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#
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# @dirty-limit-ring-full-time: Estimated average dirty ring full time
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# (in microseconds) for each dirty ring full round. The value
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# equals the dirty ring memory size divided by the average dirty
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# page rate of the virtual CPU, which can be used to observe the
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# average memory load of the virtual CPU indirectly. Note that
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# zero means guest doesn't dirty memory. (Since 8.1)
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#
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# Features:
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#
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# @deprecated: Member @disk is deprecated because block migration is.
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# Member @compression is deprecated because it is unreliable and
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# untested. It is recommended to use multifd migration, which
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# offers an alternative compression implementation that is
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# reliable and tested.
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#
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# Since: 0.14
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##
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{ 'struct': 'MigrationInfo',
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'data': {'*status': 'MigrationStatus', '*ram': 'MigrationStats',
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'*disk': { 'type': 'MigrationStats', 'features': [ 'deprecated' ] },
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'*vfio': 'VfioStats',
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'*xbzrle-cache': 'XBZRLECacheStats',
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'*total-time': 'int',
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'*expected-downtime': 'int',
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'*downtime': 'int',
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'*setup-time': 'int',
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'*cpu-throttle-percentage': 'int',
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'*error-desc': 'str',
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'*blocked-reasons': ['str'],
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'*postcopy-blocktime': 'uint32',
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'*postcopy-vcpu-blocktime': ['uint32'],
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'*compression': { 'type': 'CompressionStats', 'features': [ 'deprecated' ] },
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'*socket-address': ['SocketAddress'],
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'*dirty-limit-throttle-time-per-round': 'uint64',
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'*dirty-limit-ring-full-time': 'uint64'} }
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##
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# @query-migrate:
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#
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# Returns information about current migration process. If migration
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# is active there will be another json-object with RAM migration
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# status and if block migration is active another one with block
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# migration status.
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#
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# Returns: @MigrationInfo
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#
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# Since: 0.14
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#
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# Examples:
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#
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# 1. Before the first migration
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#
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# -> { "execute": "query-migrate" }
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# <- { "return": {} }
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#
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# 2. Migration is done and has succeeded
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#
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# -> { "execute": "query-migrate" }
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# <- { "return": {
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# "status": "completed",
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# "total-time":12345,
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# "setup-time":12345,
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# "downtime":12345,
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# "ram":{
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# "transferred":123,
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# "remaining":123,
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# "total":246,
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# "duplicate":123,
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# "normal":123,
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# "normal-bytes":123456,
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# "dirty-sync-count":15
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# }
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# }
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# }
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#
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# 3. Migration is done and has failed
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#
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# -> { "execute": "query-migrate" }
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# <- { "return": { "status": "failed" } }
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#
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# 4. Migration is being performed and is not a block migration:
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#
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# -> { "execute": "query-migrate" }
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# <- {
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# "return":{
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# "status":"active",
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# "total-time":12345,
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# "setup-time":12345,
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# "expected-downtime":12345,
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# "ram":{
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# "transferred":123,
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# "remaining":123,
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# "total":246,
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# "duplicate":123,
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# "normal":123,
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# "normal-bytes":123456,
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# "dirty-sync-count":15
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# }
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# }
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# }
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#
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# 5. Migration is being performed and is a block migration:
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#
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# -> { "execute": "query-migrate" }
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# <- {
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# "return":{
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# "status":"active",
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# "total-time":12345,
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# "setup-time":12345,
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# "expected-downtime":12345,
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# "ram":{
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# "total":1057024,
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# "remaining":1053304,
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# "transferred":3720,
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# "duplicate":123,
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# "normal":123,
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# "normal-bytes":123456,
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# "dirty-sync-count":15
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# },
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# "disk":{
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# "total":20971520,
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# "remaining":20880384,
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# "transferred":91136
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# }
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# }
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# }
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#
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# 6. Migration is being performed and XBZRLE is active:
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#
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# -> { "execute": "query-migrate" }
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# <- {
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# "return":{
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# "status":"active",
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# "total-time":12345,
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# "setup-time":12345,
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# "expected-downtime":12345,
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# "ram":{
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# "total":1057024,
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# "remaining":1053304,
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# "transferred":3720,
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# "duplicate":10,
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# "normal":3333,
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# "normal-bytes":3412992,
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# "dirty-sync-count":15
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# },
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# "xbzrle-cache":{
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# "cache-size":67108864,
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# "bytes":20971520,
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# "pages":2444343,
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# "cache-miss":2244,
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# "cache-miss-rate":0.123,
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# "encoding-rate":80.1,
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# "overflow":34434
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# }
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# }
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# }
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##
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{ 'command': 'query-migrate', 'returns': 'MigrationInfo' }
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##
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# @MigrationCapability:
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#
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# Migration capabilities enumeration
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#
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# @xbzrle: Migration supports xbzrle (Xor Based Zero Run Length
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# Encoding). This feature allows us to minimize migration traffic
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# for certain work loads, by sending compressed difference of the
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# pages
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#
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# @rdma-pin-all: Controls whether or not the entire VM memory
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# footprint is mlock()'d on demand or all at once. Refer to
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# docs/rdma.txt for usage. Disabled by default. (since 2.0)
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#
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# @zero-blocks: During storage migration encode blocks of zeroes
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# efficiently. This essentially saves 1MB of zeroes per block on
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# the wire. Enabling requires source and target VM to support
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# this feature. To enable it is sufficient to enable the
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# capability on the source VM. The feature is disabled by default.
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# (since 1.6)
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#
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# @compress: Use multiple compression threads to accelerate live
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# migration. This feature can help to reduce the migration
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# traffic, by sending compressed pages. Please note that if
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# compress and xbzrle are both on, compress only takes effect in
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# the ram bulk stage, after that, it will be disabled and only
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# xbzrle takes effect, this can help to minimize migration
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# traffic. The feature is disabled by default. (since 2.4)
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#
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# @events: generate events for each migration state change (since 2.4)
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#
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# @auto-converge: If enabled, QEMU will automatically throttle down
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# the guest to speed up convergence of RAM migration. (since 1.6)
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#
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# @postcopy-ram: Start executing on the migration target before all of
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# RAM has been migrated, pulling the remaining pages along as
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# needed. The capacity must have the same setting on both source
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# and target or migration will not even start. NOTE: If the
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# migration fails during postcopy the VM will fail. (since 2.6)
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#
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# @x-colo: If enabled, migration will never end, and the state of the
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# VM on the primary side will be migrated continuously to the VM
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# on secondary side, this process is called COarse-Grain LOck
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# Stepping (COLO) for Non-stop Service. (since 2.8)
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#
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# @release-ram: if enabled, qemu will free the migrated ram pages on
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# the source during postcopy-ram migration. (since 2.9)
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#
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# @block: If enabled, QEMU will also migrate the contents of all block
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# devices. Default is disabled. A possible alternative uses
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# mirror jobs to a builtin NBD server on the destination, which
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# offers more flexibility. (Since 2.10)
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#
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# @return-path: If enabled, migration will use the return path even
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# for precopy. (since 2.10)
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#
|
|
# @pause-before-switchover: Pause outgoing migration before
|
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# serialising device state and before disabling block IO (since
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# 2.11)
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#
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# @multifd: Use more than one fd for migration (since 4.0)
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#
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# @dirty-bitmaps: If enabled, QEMU will migrate named dirty bitmaps.
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# (since 2.12)
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#
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# @postcopy-blocktime: Calculate downtime for postcopy live migration
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# (since 3.0)
|
|
#
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# @late-block-activate: If enabled, the destination will not activate
|
|
# block devices (and thus take locks) immediately at the end of
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# migration. (since 3.0)
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#
|
|
# @x-ignore-shared: If enabled, QEMU will not migrate shared memory
|
|
# that is accessible on the destination machine. (since 4.0)
|
|
#
|
|
# @validate-uuid: Send the UUID of the source to allow the destination
|
|
# to ensure it is the same. (since 4.2)
|
|
#
|
|
# @background-snapshot: If enabled, the migration stream will be a
|
|
# snapshot of the VM exactly at the point when the migration
|
|
# procedure starts. The VM RAM is saved with running VM. (since
|
|
# 6.0)
|
|
#
|
|
# @zero-copy-send: Controls behavior on sending memory pages on
|
|
# migration. When true, enables a zero-copy mechanism for sending
|
|
# memory pages, if host supports it. Requires that QEMU be
|
|
# permitted to use locked memory for guest RAM pages. (since 7.1)
|
|
#
|
|
# @postcopy-preempt: If enabled, the migration process will allow
|
|
# postcopy requests to preempt precopy stream, so postcopy
|
|
# requests will be handled faster. This is a performance feature
|
|
# and should not affect the correctness of postcopy migration.
|
|
# (since 7.1)
|
|
#
|
|
# @switchover-ack: If enabled, migration will not stop the source VM
|
|
# and complete the migration until an ACK is received from the
|
|
# destination that it's OK to do so. Exactly when this ACK is
|
|
# sent depends on the migrated devices that use this feature. For
|
|
# example, a device can use it to make sure some of its data is
|
|
# sent and loaded in the destination before doing switchover.
|
|
# This can reduce downtime if devices that support this capability
|
|
# are present. 'return-path' capability must be enabled to use
|
|
# it. (since 8.1)
|
|
#
|
|
# @dirty-limit: If enabled, migration will throttle vCPUs as needed to
|
|
# keep their dirty page rate within @vcpu-dirty-limit. This can
|
|
# improve responsiveness of large guests during live migration,
|
|
# and can result in more stable read performance. Requires KVM
|
|
# with accelerator property "dirty-ring-size" set. (Since 8.1)
|
|
#
|
|
# Features:
|
|
#
|
|
# @deprecated: Member @block is deprecated. Use blockdev-mirror with
|
|
# NBD instead. Member @compression is deprecated because it is
|
|
# unreliable and untested. It is recommended to use multifd
|
|
# migration, which offers an alternative compression
|
|
# implementation that is reliable and tested.
|
|
#
|
|
# @unstable: Members @x-colo and @x-ignore-shared are experimental.
|
|
#
|
|
# Since: 1.2
|
|
##
|
|
{ 'enum': 'MigrationCapability',
|
|
'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
|
|
{ 'name': 'compress', 'features': [ 'deprecated' ] },
|
|
'events', 'postcopy-ram',
|
|
{ 'name': 'x-colo', 'features': [ 'unstable' ] },
|
|
'release-ram',
|
|
{ 'name': 'block', 'features': [ 'deprecated' ] },
|
|
'return-path', 'pause-before-switchover', 'multifd',
|
|
'dirty-bitmaps', 'postcopy-blocktime', 'late-block-activate',
|
|
{ 'name': 'x-ignore-shared', 'features': [ 'unstable' ] },
|
|
'validate-uuid', 'background-snapshot',
|
|
'zero-copy-send', 'postcopy-preempt', 'switchover-ack',
|
|
'dirty-limit'] }
|
|
|
|
##
|
|
# @MigrationCapabilityStatus:
|
|
#
|
|
# Migration capability information
|
|
#
|
|
# @capability: capability enum
|
|
#
|
|
# @state: capability state bool
|
|
#
|
|
# Since: 1.2
|
|
##
|
|
{ 'struct': 'MigrationCapabilityStatus',
|
|
'data': { 'capability': 'MigrationCapability', 'state': 'bool' } }
|
|
|
|
##
|
|
# @migrate-set-capabilities:
|
|
#
|
|
# Enable/Disable the following migration capabilities (like xbzrle)
|
|
#
|
|
# @capabilities: json array of capability modifications to make
|
|
#
|
|
# Since: 1.2
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-set-capabilities" , "arguments":
|
|
# { "capabilities": [ { "capability": "xbzrle", "state": true } ] } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'migrate-set-capabilities',
|
|
'data': { 'capabilities': ['MigrationCapabilityStatus'] } }
|
|
|
|
##
|
|
# @query-migrate-capabilities:
|
|
#
|
|
# Returns information about the current migration capabilities status
|
|
#
|
|
# Returns: @MigrationCapabilityStatus
|
|
#
|
|
# Since: 1.2
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "query-migrate-capabilities" }
|
|
# <- { "return": [
|
|
# {"state": false, "capability": "xbzrle"},
|
|
# {"state": false, "capability": "rdma-pin-all"},
|
|
# {"state": false, "capability": "auto-converge"},
|
|
# {"state": false, "capability": "zero-blocks"},
|
|
# {"state": false, "capability": "compress"},
|
|
# {"state": true, "capability": "events"},
|
|
# {"state": false, "capability": "postcopy-ram"},
|
|
# {"state": false, "capability": "x-colo"}
|
|
# ]}
|
|
##
|
|
{ 'command': 'query-migrate-capabilities', 'returns': ['MigrationCapabilityStatus']}
|
|
|
|
##
|
|
# @MultiFDCompression:
|
|
#
|
|
# An enumeration of multifd compression methods.
|
|
#
|
|
# @none: no compression.
|
|
#
|
|
# @zlib: use zlib compression method.
|
|
#
|
|
# @zstd: use zstd compression method.
|
|
#
|
|
# Since: 5.0
|
|
##
|
|
{ 'enum': 'MultiFDCompression',
|
|
'data': [ 'none', 'zlib',
|
|
{ 'name': 'zstd', 'if': 'CONFIG_ZSTD' } ] }
|
|
|
|
##
|
|
# @MigMode:
|
|
#
|
|
# @normal: the original form of migration. (since 8.2)
|
|
#
|
|
# @cpr-reboot: The migrate command saves state to a file, allowing one to
|
|
# quit qemu, reboot to an updated kernel, and restart an updated
|
|
# version of qemu. The caller must specify a migration URI
|
|
# that writes to and reads from a file. Unlike normal mode,
|
|
# the use of certain local storage options does not block the
|
|
# migration, but the caller must not modify guest block devices
|
|
# between the quit and restart. To avoid saving guest RAM to the
|
|
# file, the memory backend must be shared, and the @x-ignore-shared
|
|
# migration capability must be set. Guest RAM must be non-volatile
|
|
# across reboot, such as by backing it with a dax device, but this
|
|
# is not enforced. The restarted qemu arguments must match those
|
|
# used to initially start qemu, plus the -incoming option.
|
|
# (since 8.2)
|
|
##
|
|
{ 'enum': 'MigMode',
|
|
'data': [ 'normal', 'cpr-reboot' ] }
|
|
|
|
##
|
|
# @BitmapMigrationBitmapAliasTransform:
|
|
#
|
|
# @persistent: If present, the bitmap will be made persistent or
|
|
# transient depending on this parameter.
|
|
#
|
|
# Since: 6.0
|
|
##
|
|
{ 'struct': 'BitmapMigrationBitmapAliasTransform',
|
|
'data': {
|
|
'*persistent': 'bool'
|
|
} }
|
|
|
|
##
|
|
# @BitmapMigrationBitmapAlias:
|
|
#
|
|
# @name: The name of the bitmap.
|
|
#
|
|
# @alias: An alias name for migration (for example the bitmap name on
|
|
# the opposite site).
|
|
#
|
|
# @transform: Allows the modification of the migrated bitmap. (since
|
|
# 6.0)
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'struct': 'BitmapMigrationBitmapAlias',
|
|
'data': {
|
|
'name': 'str',
|
|
'alias': 'str',
|
|
'*transform': 'BitmapMigrationBitmapAliasTransform'
|
|
} }
|
|
|
|
##
|
|
# @BitmapMigrationNodeAlias:
|
|
#
|
|
# Maps a block node name and the bitmaps it has to aliases for dirty
|
|
# bitmap migration.
|
|
#
|
|
# @node-name: A block node name.
|
|
#
|
|
# @alias: An alias block node name for migration (for example the node
|
|
# name on the opposite site).
|
|
#
|
|
# @bitmaps: Mappings for the bitmaps on this node.
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'struct': 'BitmapMigrationNodeAlias',
|
|
'data': {
|
|
'node-name': 'str',
|
|
'alias': 'str',
|
|
'bitmaps': [ 'BitmapMigrationBitmapAlias' ]
|
|
} }
|
|
|
|
##
|
|
# @MigrationParameter:
|
|
#
|
|
# Migration parameters enumeration
|
|
#
|
|
# @announce-initial: Initial delay (in milliseconds) before sending
|
|
# the first announce (Since 4.0)
|
|
#
|
|
# @announce-max: Maximum delay (in milliseconds) between packets in
|
|
# the announcement (Since 4.0)
|
|
#
|
|
# @announce-rounds: Number of self-announce packets sent after
|
|
# migration (Since 4.0)
|
|
#
|
|
# @announce-step: Increase in delay (in milliseconds) between
|
|
# subsequent packets in the announcement (Since 4.0)
|
|
#
|
|
# @compress-level: Set the compression level to be used in live
|
|
# migration, the compression level is an integer between 0 and 9,
|
|
# where 0 means no compression, 1 means the best compression
|
|
# speed, and 9 means best compression ratio which will consume
|
|
# more CPU.
|
|
#
|
|
# @compress-threads: Set compression thread count to be used in live
|
|
# migration, the compression thread count is an integer between 1
|
|
# and 255.
|
|
#
|
|
# @compress-wait-thread: Controls behavior when all compression
|
|
# threads are currently busy. If true (default), wait for a free
|
|
# compression thread to become available; otherwise, send the page
|
|
# uncompressed. (Since 3.1)
|
|
#
|
|
# @decompress-threads: Set decompression thread count to be used in
|
|
# live migration, the decompression thread count is an integer
|
|
# between 1 and 255. Usually, decompression is at least 4 times as
|
|
# fast as compression, so set the decompress-threads to the number
|
|
# about 1/4 of compress-threads is adequate.
|
|
#
|
|
# @throttle-trigger-threshold: The ratio of bytes_dirty_period and
|
|
# bytes_xfer_period to trigger throttling. It is expressed as
|
|
# percentage. The default value is 50. (Since 5.0)
|
|
#
|
|
# @cpu-throttle-initial: Initial percentage of time guest cpus are
|
|
# throttled when migration auto-converge is activated. The
|
|
# default value is 20. (Since 2.7)
|
|
#
|
|
# @cpu-throttle-increment: throttle percentage increase each time
|
|
# auto-converge detects that migration is not making progress.
|
|
# The default value is 10. (Since 2.7)
|
|
#
|
|
# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage At
|
|
# the tail stage of throttling, the Guest is very sensitive to CPU
|
|
# percentage while the @cpu-throttle -increment is excessive
|
|
# usually at tail stage. If this parameter is true, we will
|
|
# compute the ideal CPU percentage used by the Guest, which may
|
|
# exactly make the dirty rate match the dirty rate threshold.
|
|
# Then we will choose a smaller throttle increment between the one
|
|
# specified by @cpu-throttle-increment and the one generated by
|
|
# ideal CPU percentage. Therefore, it is compatible to
|
|
# traditional throttling, meanwhile the throttle increment won't
|
|
# be excessive at tail stage. The default value is false. (Since
|
|
# 5.1)
|
|
#
|
|
# @tls-creds: ID of the 'tls-creds' object that provides credentials
|
|
# for establishing a TLS connection over the migration data
|
|
# channel. On the outgoing side of the migration, the credentials
|
|
# must be for a 'client' endpoint, while for the incoming side the
|
|
# credentials must be for a 'server' endpoint. Setting this will
|
|
# enable TLS for all migrations. The default is unset, resulting
|
|
# in unsecured migration at the QEMU level. (Since 2.7)
|
|
#
|
|
# @tls-hostname: hostname of the target host for the migration. This
|
|
# is required when using x509 based TLS credentials and the
|
|
# migration URI does not already include a hostname. For example
|
|
# if using fd: or exec: based migration, the hostname must be
|
|
# provided so that the server's x509 certificate identity can be
|
|
# validated. (Since 2.7)
|
|
#
|
|
# @tls-authz: ID of the 'authz' object subclass that provides access
|
|
# control checking of the TLS x509 certificate distinguished name.
|
|
# This object is only resolved at time of use, so can be deleted
|
|
# and recreated on the fly while the migration server is active.
|
|
# If missing, it will default to denying access (Since 4.0)
|
|
#
|
|
# @max-bandwidth: to set maximum speed for migration. maximum speed
|
|
# in bytes per second. (Since 2.8)
|
|
#
|
|
# @avail-switchover-bandwidth: to set the available bandwidth that
|
|
# migration can use during switchover phase. NOTE! This does not
|
|
# limit the bandwidth during switchover, but only for calculations when
|
|
# making decisions to switchover. By default, this value is zero,
|
|
# which means QEMU will estimate the bandwidth automatically. This can
|
|
# be set when the estimated value is not accurate, while the user is
|
|
# able to guarantee such bandwidth is available when switching over.
|
|
# When specified correctly, this can make the switchover decision much
|
|
# more accurate. (Since 8.2)
|
|
#
|
|
# @downtime-limit: set maximum tolerated downtime for migration.
|
|
# maximum downtime in milliseconds (Since 2.8)
|
|
#
|
|
# @x-checkpoint-delay: The delay time (in ms) between two COLO
|
|
# checkpoints in periodic mode. (Since 2.8)
|
|
#
|
|
# @block-incremental: Affects how much storage is migrated when the
|
|
# block migration capability is enabled. When false, the entire
|
|
# storage backing chain is migrated into a flattened image at the
|
|
# destination; when true, only the active qcow2 layer is migrated
|
|
# and the destination must already have access to the same backing
|
|
# chain as was used on the source. (since 2.10)
|
|
#
|
|
# @multifd-channels: Number of channels used to migrate data in
|
|
# parallel. This is the same number that the number of sockets
|
|
# used for migration. The default value is 2 (since 4.0)
|
|
#
|
|
# @xbzrle-cache-size: cache size to be used by XBZRLE migration. It
|
|
# needs to be a multiple of the target page size and a power of 2
|
|
# (Since 2.11)
|
|
#
|
|
# @max-postcopy-bandwidth: Background transfer bandwidth during
|
|
# postcopy. Defaults to 0 (unlimited). In bytes per second.
|
|
# (Since 3.0)
|
|
#
|
|
# @max-cpu-throttle: maximum cpu throttle percentage. Defaults to 99.
|
|
# (Since 3.1)
|
|
#
|
|
# @multifd-compression: Which compression method to use. Defaults to
|
|
# none. (Since 5.0)
|
|
#
|
|
# @multifd-zlib-level: Set the compression level to be used in live
|
|
# migration, the compression level is an integer between 0 and 9,
|
|
# where 0 means no compression, 1 means the best compression
|
|
# speed, and 9 means best compression ratio which will consume
|
|
# more CPU. Defaults to 1. (Since 5.0)
|
|
#
|
|
# @multifd-zstd-level: Set the compression level to be used in live
|
|
# migration, the compression level is an integer between 0 and 20,
|
|
# where 0 means no compression, 1 means the best compression
|
|
# speed, and 20 means best compression ratio which will consume
|
|
# more CPU. Defaults to 1. (Since 5.0)
|
|
#
|
|
# @block-bitmap-mapping: Maps block nodes and bitmaps on them to
|
|
# aliases for the purpose of dirty bitmap migration. Such aliases
|
|
# may for example be the corresponding names on the opposite site.
|
|
# The mapping must be one-to-one, but not necessarily complete: On
|
|
# the source, unmapped bitmaps and all bitmaps on unmapped nodes
|
|
# will be ignored. On the destination, encountering an unmapped
|
|
# alias in the incoming migration stream will result in a report,
|
|
# and all further bitmap migration data will then be discarded.
|
|
# Note that the destination does not know about bitmaps it does
|
|
# not receive, so there is no limitation or requirement regarding
|
|
# the number of bitmaps received, or how they are named, or on
|
|
# which nodes they are placed. By default (when this parameter
|
|
# has never been set), bitmap names are mapped to themselves.
|
|
# Nodes are mapped to their block device name if there is one, and
|
|
# to their node name otherwise. (Since 5.2)
|
|
#
|
|
# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty
|
|
# limit during live migration. Should be in the range 1 to 1000ms.
|
|
# Defaults to 1000ms. (Since 8.1)
|
|
#
|
|
# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration.
|
|
# Defaults to 1. (Since 8.1)
|
|
#
|
|
# @mode: Migration mode. See description in @MigMode. Default is 'normal'.
|
|
# (Since 8.2)
|
|
#
|
|
# Features:
|
|
#
|
|
# @deprecated: Member @block-incremental is deprecated. Use
|
|
# blockdev-mirror with NBD instead. Members @compress-level,
|
|
# @compress-threads, @decompress-threads and @compress-wait-thread
|
|
# are deprecated because @compression is deprecated.
|
|
#
|
|
# @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period
|
|
# are experimental.
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
{ 'enum': 'MigrationParameter',
|
|
'data': ['announce-initial', 'announce-max',
|
|
'announce-rounds', 'announce-step',
|
|
{ 'name': 'compress-level', 'features': [ 'deprecated' ] },
|
|
{ 'name': 'compress-threads', 'features': [ 'deprecated' ] },
|
|
{ 'name': 'decompress-threads', 'features': [ 'deprecated' ] },
|
|
{ 'name': 'compress-wait-thread', 'features': [ 'deprecated' ] },
|
|
'throttle-trigger-threshold',
|
|
'cpu-throttle-initial', 'cpu-throttle-increment',
|
|
'cpu-throttle-tailslow',
|
|
'tls-creds', 'tls-hostname', 'tls-authz', 'max-bandwidth',
|
|
'avail-switchover-bandwidth', 'downtime-limit',
|
|
{ 'name': 'x-checkpoint-delay', 'features': [ 'unstable' ] },
|
|
{ 'name': 'block-incremental', 'features': [ 'deprecated' ] },
|
|
'multifd-channels',
|
|
'xbzrle-cache-size', 'max-postcopy-bandwidth',
|
|
'max-cpu-throttle', 'multifd-compression',
|
|
'multifd-zlib-level', 'multifd-zstd-level',
|
|
'block-bitmap-mapping',
|
|
{ 'name': 'x-vcpu-dirty-limit-period', 'features': ['unstable'] },
|
|
'vcpu-dirty-limit',
|
|
'mode'] }
|
|
|
|
##
|
|
# @MigrateSetParameters:
|
|
#
|
|
# @announce-initial: Initial delay (in milliseconds) before sending
|
|
# the first announce (Since 4.0)
|
|
#
|
|
# @announce-max: Maximum delay (in milliseconds) between packets in
|
|
# the announcement (Since 4.0)
|
|
#
|
|
# @announce-rounds: Number of self-announce packets sent after
|
|
# migration (Since 4.0)
|
|
#
|
|
# @announce-step: Increase in delay (in milliseconds) between
|
|
# subsequent packets in the announcement (Since 4.0)
|
|
#
|
|
# @compress-level: compression level
|
|
#
|
|
# @compress-threads: compression thread count
|
|
#
|
|
# @compress-wait-thread: Controls behavior when all compression
|
|
# threads are currently busy. If true (default), wait for a free
|
|
# compression thread to become available; otherwise, send the page
|
|
# uncompressed. (Since 3.1)
|
|
#
|
|
# @decompress-threads: decompression thread count
|
|
#
|
|
# @throttle-trigger-threshold: The ratio of bytes_dirty_period and
|
|
# bytes_xfer_period to trigger throttling. It is expressed as
|
|
# percentage. The default value is 50. (Since 5.0)
|
|
#
|
|
# @cpu-throttle-initial: Initial percentage of time guest cpus are
|
|
# throttled when migration auto-converge is activated. The
|
|
# default value is 20. (Since 2.7)
|
|
#
|
|
# @cpu-throttle-increment: throttle percentage increase each time
|
|
# auto-converge detects that migration is not making progress.
|
|
# The default value is 10. (Since 2.7)
|
|
#
|
|
# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage At
|
|
# the tail stage of throttling, the Guest is very sensitive to CPU
|
|
# percentage while the @cpu-throttle -increment is excessive
|
|
# usually at tail stage. If this parameter is true, we will
|
|
# compute the ideal CPU percentage used by the Guest, which may
|
|
# exactly make the dirty rate match the dirty rate threshold.
|
|
# Then we will choose a smaller throttle increment between the one
|
|
# specified by @cpu-throttle-increment and the one generated by
|
|
# ideal CPU percentage. Therefore, it is compatible to
|
|
# traditional throttling, meanwhile the throttle increment won't
|
|
# be excessive at tail stage. The default value is false. (Since
|
|
# 5.1)
|
|
#
|
|
# @tls-creds: ID of the 'tls-creds' object that provides credentials
|
|
# for establishing a TLS connection over the migration data
|
|
# channel. On the outgoing side of the migration, the credentials
|
|
# must be for a 'client' endpoint, while for the incoming side the
|
|
# credentials must be for a 'server' endpoint. Setting this to a
|
|
# non-empty string enables TLS for all migrations. An empty
|
|
# string means that QEMU will use plain text mode for migration,
|
|
# rather than TLS (Since 2.9) Previously (since 2.7), this was
|
|
# reported by omitting tls-creds instead.
|
|
#
|
|
# @tls-hostname: hostname of the target host for the migration. This
|
|
# is required when using x509 based TLS credentials and the
|
|
# migration URI does not already include a hostname. For example
|
|
# if using fd: or exec: based migration, the hostname must be
|
|
# provided so that the server's x509 certificate identity can be
|
|
# validated. (Since 2.7) An empty string means that QEMU will use
|
|
# the hostname associated with the migration URI, if any. (Since
|
|
# 2.9) Previously (since 2.7), this was reported by omitting
|
|
# tls-hostname instead.
|
|
#
|
|
# @max-bandwidth: to set maximum speed for migration. maximum speed
|
|
# in bytes per second. (Since 2.8)
|
|
#
|
|
# @avail-switchover-bandwidth: to set the available bandwidth that
|
|
# migration can use during switchover phase. NOTE! This does not
|
|
# limit the bandwidth during switchover, but only for calculations when
|
|
# making decisions to switchover. By default, this value is zero,
|
|
# which means QEMU will estimate the bandwidth automatically. This can
|
|
# be set when the estimated value is not accurate, while the user is
|
|
# able to guarantee such bandwidth is available when switching over.
|
|
# When specified correctly, this can make the switchover decision much
|
|
# more accurate. (Since 8.2)
|
|
#
|
|
# @downtime-limit: set maximum tolerated downtime for migration.
|
|
# maximum downtime in milliseconds (Since 2.8)
|
|
#
|
|
# @x-checkpoint-delay: the delay time between two COLO checkpoints.
|
|
# (Since 2.8)
|
|
#
|
|
# @block-incremental: Affects how much storage is migrated when the
|
|
# block migration capability is enabled. When false, the entire
|
|
# storage backing chain is migrated into a flattened image at the
|
|
# destination; when true, only the active qcow2 layer is migrated
|
|
# and the destination must already have access to the same backing
|
|
# chain as was used on the source. (since 2.10)
|
|
#
|
|
# @multifd-channels: Number of channels used to migrate data in
|
|
# parallel. This is the same number that the number of sockets
|
|
# used for migration. The default value is 2 (since 4.0)
|
|
#
|
|
# @xbzrle-cache-size: cache size to be used by XBZRLE migration. It
|
|
# needs to be a multiple of the target page size and a power of 2
|
|
# (Since 2.11)
|
|
#
|
|
# @max-postcopy-bandwidth: Background transfer bandwidth during
|
|
# postcopy. Defaults to 0 (unlimited). In bytes per second.
|
|
# (Since 3.0)
|
|
#
|
|
# @max-cpu-throttle: maximum cpu throttle percentage. The default
|
|
# value is 99. (Since 3.1)
|
|
#
|
|
# @multifd-compression: Which compression method to use. Defaults to
|
|
# none. (Since 5.0)
|
|
#
|
|
# @multifd-zlib-level: Set the compression level to be used in live
|
|
# migration, the compression level is an integer between 0 and 9,
|
|
# where 0 means no compression, 1 means the best compression
|
|
# speed, and 9 means best compression ratio which will consume
|
|
# more CPU. Defaults to 1. (Since 5.0)
|
|
#
|
|
# @multifd-zstd-level: Set the compression level to be used in live
|
|
# migration, the compression level is an integer between 0 and 20,
|
|
# where 0 means no compression, 1 means the best compression
|
|
# speed, and 20 means best compression ratio which will consume
|
|
# more CPU. Defaults to 1. (Since 5.0)
|
|
#
|
|
# @block-bitmap-mapping: Maps block nodes and bitmaps on them to
|
|
# aliases for the purpose of dirty bitmap migration. Such aliases
|
|
# may for example be the corresponding names on the opposite site.
|
|
# The mapping must be one-to-one, but not necessarily complete: On
|
|
# the source, unmapped bitmaps and all bitmaps on unmapped nodes
|
|
# will be ignored. On the destination, encountering an unmapped
|
|
# alias in the incoming migration stream will result in a report,
|
|
# and all further bitmap migration data will then be discarded.
|
|
# Note that the destination does not know about bitmaps it does
|
|
# not receive, so there is no limitation or requirement regarding
|
|
# the number of bitmaps received, or how they are named, or on
|
|
# which nodes they are placed. By default (when this parameter
|
|
# has never been set), bitmap names are mapped to themselves.
|
|
# Nodes are mapped to their block device name if there is one, and
|
|
# to their node name otherwise. (Since 5.2)
|
|
#
|
|
# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty
|
|
# limit during live migration. Should be in the range 1 to 1000ms.
|
|
# Defaults to 1000ms. (Since 8.1)
|
|
#
|
|
# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration.
|
|
# Defaults to 1. (Since 8.1)
|
|
#
|
|
# @mode: Migration mode. See description in @MigMode. Default is 'normal'.
|
|
# (Since 8.2)
|
|
#
|
|
# Features:
|
|
#
|
|
# @deprecated: Member @block-incremental is deprecated. Use
|
|
# blockdev-mirror with NBD instead. Members @compress-level,
|
|
# @compress-threads, @decompress-threads and @compress-wait-thread
|
|
# are deprecated because @compression is deprecated.
|
|
#
|
|
# @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period
|
|
# are experimental.
|
|
#
|
|
# TODO: either fuse back into MigrationParameters, or make
|
|
# MigrationParameters members mandatory
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
{ 'struct': 'MigrateSetParameters',
|
|
'data': { '*announce-initial': 'size',
|
|
'*announce-max': 'size',
|
|
'*announce-rounds': 'size',
|
|
'*announce-step': 'size',
|
|
'*compress-level': { 'type': 'uint8',
|
|
'features': [ 'deprecated' ] },
|
|
'*compress-threads': { 'type': 'uint8',
|
|
'features': [ 'deprecated' ] },
|
|
'*compress-wait-thread': { 'type': 'bool',
|
|
'features': [ 'deprecated' ] },
|
|
'*decompress-threads': { 'type': 'uint8',
|
|
'features': [ 'deprecated' ] },
|
|
'*throttle-trigger-threshold': 'uint8',
|
|
'*cpu-throttle-initial': 'uint8',
|
|
'*cpu-throttle-increment': 'uint8',
|
|
'*cpu-throttle-tailslow': 'bool',
|
|
'*tls-creds': 'StrOrNull',
|
|
'*tls-hostname': 'StrOrNull',
|
|
'*tls-authz': 'StrOrNull',
|
|
'*max-bandwidth': 'size',
|
|
'*avail-switchover-bandwidth': 'size',
|
|
'*downtime-limit': 'uint64',
|
|
'*x-checkpoint-delay': { 'type': 'uint32',
|
|
'features': [ 'unstable' ] },
|
|
'*block-incremental': { 'type': 'bool',
|
|
'features': [ 'deprecated' ] },
|
|
'*multifd-channels': 'uint8',
|
|
'*xbzrle-cache-size': 'size',
|
|
'*max-postcopy-bandwidth': 'size',
|
|
'*max-cpu-throttle': 'uint8',
|
|
'*multifd-compression': 'MultiFDCompression',
|
|
'*multifd-zlib-level': 'uint8',
|
|
'*multifd-zstd-level': 'uint8',
|
|
'*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ],
|
|
'*x-vcpu-dirty-limit-period': { 'type': 'uint64',
|
|
'features': [ 'unstable' ] },
|
|
'*vcpu-dirty-limit': 'uint64',
|
|
'*mode': 'MigMode'} }
|
|
|
|
##
|
|
# @migrate-set-parameters:
|
|
#
|
|
# Set various migration parameters.
|
|
#
|
|
# Since: 2.4
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-set-parameters" ,
|
|
# "arguments": { "multifd-channels": 5 } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'migrate-set-parameters', 'boxed': true,
|
|
'data': 'MigrateSetParameters' }
|
|
|
|
##
|
|
# @MigrationParameters:
|
|
#
|
|
# The optional members aren't actually optional.
|
|
#
|
|
# @announce-initial: Initial delay (in milliseconds) before sending
|
|
# the first announce (Since 4.0)
|
|
#
|
|
# @announce-max: Maximum delay (in milliseconds) between packets in
|
|
# the announcement (Since 4.0)
|
|
#
|
|
# @announce-rounds: Number of self-announce packets sent after
|
|
# migration (Since 4.0)
|
|
#
|
|
# @announce-step: Increase in delay (in milliseconds) between
|
|
# subsequent packets in the announcement (Since 4.0)
|
|
#
|
|
# @compress-level: compression level
|
|
#
|
|
# @compress-threads: compression thread count
|
|
#
|
|
# @compress-wait-thread: Controls behavior when all compression
|
|
# threads are currently busy. If true (default), wait for a free
|
|
# compression thread to become available; otherwise, send the page
|
|
# uncompressed. (Since 3.1)
|
|
#
|
|
# @decompress-threads: decompression thread count
|
|
#
|
|
# @throttle-trigger-threshold: The ratio of bytes_dirty_period and
|
|
# bytes_xfer_period to trigger throttling. It is expressed as
|
|
# percentage. The default value is 50. (Since 5.0)
|
|
#
|
|
# @cpu-throttle-initial: Initial percentage of time guest cpus are
|
|
# throttled when migration auto-converge is activated. (Since
|
|
# 2.7)
|
|
#
|
|
# @cpu-throttle-increment: throttle percentage increase each time
|
|
# auto-converge detects that migration is not making progress.
|
|
# (Since 2.7)
|
|
#
|
|
# @cpu-throttle-tailslow: Make CPU throttling slower at tail stage At
|
|
# the tail stage of throttling, the Guest is very sensitive to CPU
|
|
# percentage while the @cpu-throttle -increment is excessive
|
|
# usually at tail stage. If this parameter is true, we will
|
|
# compute the ideal CPU percentage used by the Guest, which may
|
|
# exactly make the dirty rate match the dirty rate threshold.
|
|
# Then we will choose a smaller throttle increment between the one
|
|
# specified by @cpu-throttle-increment and the one generated by
|
|
# ideal CPU percentage. Therefore, it is compatible to
|
|
# traditional throttling, meanwhile the throttle increment won't
|
|
# be excessive at tail stage. The default value is false. (Since
|
|
# 5.1)
|
|
#
|
|
# @tls-creds: ID of the 'tls-creds' object that provides credentials
|
|
# for establishing a TLS connection over the migration data
|
|
# channel. On the outgoing side of the migration, the credentials
|
|
# must be for a 'client' endpoint, while for the incoming side the
|
|
# credentials must be for a 'server' endpoint. An empty string
|
|
# means that QEMU will use plain text mode for migration, rather
|
|
# than TLS (Since 2.7) Note: 2.8 reports this by omitting
|
|
# tls-creds instead.
|
|
#
|
|
# @tls-hostname: hostname of the target host for the migration. This
|
|
# is required when using x509 based TLS credentials and the
|
|
# migration URI does not already include a hostname. For example
|
|
# if using fd: or exec: based migration, the hostname must be
|
|
# provided so that the server's x509 certificate identity can be
|
|
# validated. (Since 2.7) An empty string means that QEMU will use
|
|
# the hostname associated with the migration URI, if any. (Since
|
|
# 2.9) Note: 2.8 reports this by omitting tls-hostname instead.
|
|
#
|
|
# @tls-authz: ID of the 'authz' object subclass that provides access
|
|
# control checking of the TLS x509 certificate distinguished name.
|
|
# (Since 4.0)
|
|
#
|
|
# @max-bandwidth: to set maximum speed for migration. maximum speed
|
|
# in bytes per second. (Since 2.8)
|
|
#
|
|
# @avail-switchover-bandwidth: to set the available bandwidth that
|
|
# migration can use during switchover phase. NOTE! This does not
|
|
# limit the bandwidth during switchover, but only for calculations when
|
|
# making decisions to switchover. By default, this value is zero,
|
|
# which means QEMU will estimate the bandwidth automatically. This can
|
|
# be set when the estimated value is not accurate, while the user is
|
|
# able to guarantee such bandwidth is available when switching over.
|
|
# When specified correctly, this can make the switchover decision much
|
|
# more accurate. (Since 8.2)
|
|
#
|
|
# @downtime-limit: set maximum tolerated downtime for migration.
|
|
# maximum downtime in milliseconds (Since 2.8)
|
|
#
|
|
# @x-checkpoint-delay: the delay time between two COLO checkpoints.
|
|
# (Since 2.8)
|
|
#
|
|
# @block-incremental: Affects how much storage is migrated when the
|
|
# block migration capability is enabled. When false, the entire
|
|
# storage backing chain is migrated into a flattened image at the
|
|
# destination; when true, only the active qcow2 layer is migrated
|
|
# and the destination must already have access to the same backing
|
|
# chain as was used on the source. (since 2.10)
|
|
#
|
|
# @multifd-channels: Number of channels used to migrate data in
|
|
# parallel. This is the same number that the number of sockets
|
|
# used for migration. The default value is 2 (since 4.0)
|
|
#
|
|
# @xbzrle-cache-size: cache size to be used by XBZRLE migration. It
|
|
# needs to be a multiple of the target page size and a power of 2
|
|
# (Since 2.11)
|
|
#
|
|
# @max-postcopy-bandwidth: Background transfer bandwidth during
|
|
# postcopy. Defaults to 0 (unlimited). In bytes per second.
|
|
# (Since 3.0)
|
|
#
|
|
# @max-cpu-throttle: maximum cpu throttle percentage. Defaults to 99.
|
|
# (Since 3.1)
|
|
#
|
|
# @multifd-compression: Which compression method to use. Defaults to
|
|
# none. (Since 5.0)
|
|
#
|
|
# @multifd-zlib-level: Set the compression level to be used in live
|
|
# migration, the compression level is an integer between 0 and 9,
|
|
# where 0 means no compression, 1 means the best compression
|
|
# speed, and 9 means best compression ratio which will consume
|
|
# more CPU. Defaults to 1. (Since 5.0)
|
|
#
|
|
# @multifd-zstd-level: Set the compression level to be used in live
|
|
# migration, the compression level is an integer between 0 and 20,
|
|
# where 0 means no compression, 1 means the best compression
|
|
# speed, and 20 means best compression ratio which will consume
|
|
# more CPU. Defaults to 1. (Since 5.0)
|
|
#
|
|
# @block-bitmap-mapping: Maps block nodes and bitmaps on them to
|
|
# aliases for the purpose of dirty bitmap migration. Such aliases
|
|
# may for example be the corresponding names on the opposite site.
|
|
# The mapping must be one-to-one, but not necessarily complete: On
|
|
# the source, unmapped bitmaps and all bitmaps on unmapped nodes
|
|
# will be ignored. On the destination, encountering an unmapped
|
|
# alias in the incoming migration stream will result in a report,
|
|
# and all further bitmap migration data will then be discarded.
|
|
# Note that the destination does not know about bitmaps it does
|
|
# not receive, so there is no limitation or requirement regarding
|
|
# the number of bitmaps received, or how they are named, or on
|
|
# which nodes they are placed. By default (when this parameter
|
|
# has never been set), bitmap names are mapped to themselves.
|
|
# Nodes are mapped to their block device name if there is one, and
|
|
# to their node name otherwise. (Since 5.2)
|
|
#
|
|
# @x-vcpu-dirty-limit-period: Periodic time (in milliseconds) of dirty
|
|
# limit during live migration. Should be in the range 1 to 1000ms.
|
|
# Defaults to 1000ms. (Since 8.1)
|
|
#
|
|
# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration.
|
|
# Defaults to 1. (Since 8.1)
|
|
#
|
|
# @mode: Migration mode. See description in @MigMode. Default is 'normal'.
|
|
# (Since 8.2)
|
|
#
|
|
# Features:
|
|
#
|
|
# @deprecated: Member @block-incremental is deprecated. Use
|
|
# blockdev-mirror with NBD instead. Members @compress-level,
|
|
# @compress-threads, @decompress-threads and @compress-wait-thread
|
|
# are deprecated because @compression is deprecated.
|
|
#
|
|
# @unstable: Members @x-checkpoint-delay and @x-vcpu-dirty-limit-period
|
|
# are experimental.
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
{ 'struct': 'MigrationParameters',
|
|
'data': { '*announce-initial': 'size',
|
|
'*announce-max': 'size',
|
|
'*announce-rounds': 'size',
|
|
'*announce-step': 'size',
|
|
'*compress-level': { 'type': 'uint8',
|
|
'features': [ 'deprecated' ] },
|
|
'*compress-threads': { 'type': 'uint8',
|
|
'features': [ 'deprecated' ] },
|
|
'*compress-wait-thread': { 'type': 'bool',
|
|
'features': [ 'deprecated' ] },
|
|
'*decompress-threads': { 'type': 'uint8',
|
|
'features': [ 'deprecated' ] },
|
|
'*throttle-trigger-threshold': 'uint8',
|
|
'*cpu-throttle-initial': 'uint8',
|
|
'*cpu-throttle-increment': 'uint8',
|
|
'*cpu-throttle-tailslow': 'bool',
|
|
'*tls-creds': 'str',
|
|
'*tls-hostname': 'str',
|
|
'*tls-authz': 'str',
|
|
'*max-bandwidth': 'size',
|
|
'*avail-switchover-bandwidth': 'size',
|
|
'*downtime-limit': 'uint64',
|
|
'*x-checkpoint-delay': { 'type': 'uint32',
|
|
'features': [ 'unstable' ] },
|
|
'*block-incremental': { 'type': 'bool',
|
|
'features': [ 'deprecated' ] },
|
|
'*multifd-channels': 'uint8',
|
|
'*xbzrle-cache-size': 'size',
|
|
'*max-postcopy-bandwidth': 'size',
|
|
'*max-cpu-throttle': 'uint8',
|
|
'*multifd-compression': 'MultiFDCompression',
|
|
'*multifd-zlib-level': 'uint8',
|
|
'*multifd-zstd-level': 'uint8',
|
|
'*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ],
|
|
'*x-vcpu-dirty-limit-period': { 'type': 'uint64',
|
|
'features': [ 'unstable' ] },
|
|
'*vcpu-dirty-limit': 'uint64',
|
|
'*mode': 'MigMode'} }
|
|
|
|
##
|
|
# @query-migrate-parameters:
|
|
#
|
|
# Returns information about the current migration parameters
|
|
#
|
|
# Returns: @MigrationParameters
|
|
#
|
|
# Since: 2.4
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "query-migrate-parameters" }
|
|
# <- { "return": {
|
|
# "multifd-channels": 2,
|
|
# "cpu-throttle-increment": 10,
|
|
# "cpu-throttle-initial": 20,
|
|
# "max-bandwidth": 33554432,
|
|
# "downtime-limit": 300
|
|
# }
|
|
# }
|
|
##
|
|
{ 'command': 'query-migrate-parameters',
|
|
'returns': 'MigrationParameters' }
|
|
|
|
##
|
|
# @migrate-start-postcopy:
|
|
#
|
|
# Followup to a migration command to switch the migration to postcopy
|
|
# mode. The postcopy-ram capability must be set on both source and
|
|
# destination before the original migration command.
|
|
#
|
|
# Since: 2.5
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-start-postcopy" }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'migrate-start-postcopy' }
|
|
|
|
##
|
|
# @MIGRATION:
|
|
#
|
|
# Emitted when a migration event happens
|
|
#
|
|
# @status: @MigrationStatus describing the current migration status.
|
|
#
|
|
# Since: 2.4
|
|
#
|
|
# Example:
|
|
#
|
|
# <- {"timestamp": {"seconds": 1432121972, "microseconds": 744001},
|
|
# "event": "MIGRATION",
|
|
# "data": {"status": "completed"} }
|
|
##
|
|
{ 'event': 'MIGRATION',
|
|
'data': {'status': 'MigrationStatus'}}
|
|
|
|
##
|
|
# @MIGRATION_PASS:
|
|
#
|
|
# Emitted from the source side of a migration at the start of each
|
|
# pass (when it syncs the dirty bitmap)
|
|
#
|
|
# @pass: An incrementing count (starting at 1 on the first pass)
|
|
#
|
|
# Since: 2.6
|
|
#
|
|
# Example:
|
|
#
|
|
# <- { "timestamp": {"seconds": 1449669631, "microseconds": 239225},
|
|
# "event": "MIGRATION_PASS", "data": {"pass": 2} }
|
|
##
|
|
{ 'event': 'MIGRATION_PASS',
|
|
'data': { 'pass': 'int' } }
|
|
|
|
##
|
|
# @COLOMessage:
|
|
#
|
|
# The message transmission between Primary side and Secondary side.
|
|
#
|
|
# @checkpoint-ready: Secondary VM (SVM) is ready for checkpointing
|
|
#
|
|
# @checkpoint-request: Primary VM (PVM) tells SVM to prepare for
|
|
# checkpointing
|
|
#
|
|
# @checkpoint-reply: SVM gets PVM's checkpoint request
|
|
#
|
|
# @vmstate-send: VM's state will be sent by PVM.
|
|
#
|
|
# @vmstate-size: The total size of VMstate.
|
|
#
|
|
# @vmstate-received: VM's state has been received by SVM.
|
|
#
|
|
# @vmstate-loaded: VM's state has been loaded by SVM.
|
|
#
|
|
# Since: 2.8
|
|
##
|
|
{ 'enum': 'COLOMessage',
|
|
'data': [ 'checkpoint-ready', 'checkpoint-request', 'checkpoint-reply',
|
|
'vmstate-send', 'vmstate-size', 'vmstate-received',
|
|
'vmstate-loaded' ] }
|
|
|
|
##
|
|
# @COLOMode:
|
|
#
|
|
# The COLO current mode.
|
|
#
|
|
# @none: COLO is disabled.
|
|
#
|
|
# @primary: COLO node in primary side.
|
|
#
|
|
# @secondary: COLO node in slave side.
|
|
#
|
|
# Since: 2.8
|
|
##
|
|
{ 'enum': 'COLOMode',
|
|
'data': [ 'none', 'primary', 'secondary'] }
|
|
|
|
##
|
|
# @FailoverStatus:
|
|
#
|
|
# An enumeration of COLO failover status
|
|
#
|
|
# @none: no failover has ever happened
|
|
#
|
|
# @require: got failover requirement but not handled
|
|
#
|
|
# @active: in the process of doing failover
|
|
#
|
|
# @completed: finish the process of failover
|
|
#
|
|
# @relaunch: restart the failover process, from 'none' -> 'completed'
|
|
# (Since 2.9)
|
|
#
|
|
# Since: 2.8
|
|
##
|
|
{ 'enum': 'FailoverStatus',
|
|
'data': [ 'none', 'require', 'active', 'completed', 'relaunch' ] }
|
|
|
|
##
|
|
# @COLO_EXIT:
|
|
#
|
|
# Emitted when VM finishes COLO mode due to some errors happening or
|
|
# at the request of users.
|
|
#
|
|
# @mode: report COLO mode when COLO exited.
|
|
#
|
|
# @reason: describes the reason for the COLO exit.
|
|
#
|
|
# Since: 3.1
|
|
#
|
|
# Example:
|
|
#
|
|
# <- { "timestamp": {"seconds": 2032141960, "microseconds": 417172},
|
|
# "event": "COLO_EXIT", "data": {"mode": "primary", "reason": "request" } }
|
|
##
|
|
{ 'event': 'COLO_EXIT',
|
|
'data': {'mode': 'COLOMode', 'reason': 'COLOExitReason' } }
|
|
|
|
##
|
|
# @COLOExitReason:
|
|
#
|
|
# The reason for a COLO exit.
|
|
#
|
|
# @none: failover has never happened. This state does not occur in
|
|
# the COLO_EXIT event, and is only visible in the result of
|
|
# query-colo-status.
|
|
#
|
|
# @request: COLO exit is due to an external request.
|
|
#
|
|
# @error: COLO exit is due to an internal error.
|
|
#
|
|
# @processing: COLO is currently handling a failover (since 4.0).
|
|
#
|
|
# Since: 3.1
|
|
##
|
|
{ 'enum': 'COLOExitReason',
|
|
'data': [ 'none', 'request', 'error' , 'processing' ] }
|
|
|
|
##
|
|
# @x-colo-lost-heartbeat:
|
|
#
|
|
# Tell qemu that heartbeat is lost, request it to do takeover
|
|
# procedures. If this command is sent to the PVM, the Primary side
|
|
# will exit COLO mode. If sent to the Secondary, the Secondary side
|
|
# will run failover work, then takes over server operation to become
|
|
# the service VM.
|
|
#
|
|
# Features:
|
|
#
|
|
# @unstable: This command is experimental.
|
|
#
|
|
# Since: 2.8
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "x-colo-lost-heartbeat" }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'x-colo-lost-heartbeat',
|
|
'features': [ 'unstable' ],
|
|
'if': 'CONFIG_REPLICATION' }
|
|
|
|
##
|
|
# @migrate_cancel:
|
|
#
|
|
# Cancel the current executing migration process.
|
|
#
|
|
# Returns: nothing on success
|
|
#
|
|
# Notes: This command succeeds even if there is no migration process
|
|
# running.
|
|
#
|
|
# Since: 0.14
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate_cancel" }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'migrate_cancel' }
|
|
|
|
##
|
|
# @migrate-continue:
|
|
#
|
|
# Continue migration when it's in a paused state.
|
|
#
|
|
# @state: The state the migration is currently expected to be in
|
|
#
|
|
# Returns: nothing on success
|
|
#
|
|
# Since: 2.11
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-continue" , "arguments":
|
|
# { "state": "pre-switchover" } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'migrate-continue', 'data': {'state': 'MigrationStatus'} }
|
|
|
|
##
|
|
# @MigrationAddressType:
|
|
#
|
|
# The migration stream transport mechanisms.
|
|
#
|
|
# @socket: Migrate via socket.
|
|
#
|
|
# @exec: Direct the migration stream to another process.
|
|
#
|
|
# @rdma: Migrate via RDMA.
|
|
#
|
|
# @file: Direct the migration stream to a file.
|
|
#
|
|
# Since 8.2
|
|
##
|
|
{ 'enum': 'MigrationAddressType',
|
|
'data': [ 'socket', 'exec', 'rdma', 'file' ] }
|
|
|
|
##
|
|
# @FileMigrationArgs:
|
|
#
|
|
# @filename: The file to receive the migration stream
|
|
#
|
|
# @offset: The file offset where the migration stream will start
|
|
#
|
|
# Since 8.2
|
|
##
|
|
{ 'struct': 'FileMigrationArgs',
|
|
'data': { 'filename': 'str',
|
|
'offset': 'uint64' } }
|
|
|
|
##
|
|
# @MigrationExecCommand:
|
|
#
|
|
# @args: command (list head) and arguments to execute.
|
|
#
|
|
# Since 8.2
|
|
##
|
|
{ 'struct': 'MigrationExecCommand',
|
|
'data': {'args': [ 'str' ] } }
|
|
|
|
##
|
|
# @MigrationAddress:
|
|
#
|
|
# Migration endpoint configuration.
|
|
#
|
|
# Since 8.2
|
|
##
|
|
{ 'union': 'MigrationAddress',
|
|
'base': { 'transport' : 'MigrationAddressType'},
|
|
'discriminator': 'transport',
|
|
'data': {
|
|
'socket': 'SocketAddress',
|
|
'exec': 'MigrationExecCommand',
|
|
'rdma': 'InetSocketAddress',
|
|
'file': 'FileMigrationArgs' } }
|
|
|
|
##
|
|
# @MigrationChannelType:
|
|
#
|
|
# The migration channel-type request options.
|
|
#
|
|
# @main: Main outbound migration channel.
|
|
#
|
|
# Since 8.1
|
|
##
|
|
{ 'enum': 'MigrationChannelType',
|
|
'data': [ 'main' ] }
|
|
|
|
##
|
|
# @MigrationChannel:
|
|
#
|
|
# Migration stream channel parameters.
|
|
#
|
|
# @channel-type: Channel type for transferring packet information.
|
|
#
|
|
# @addr: Migration endpoint configuration on destination interface.
|
|
#
|
|
# Since 8.1
|
|
##
|
|
{ 'struct': 'MigrationChannel',
|
|
'data': {
|
|
'channel-type': 'MigrationChannelType',
|
|
'addr': 'MigrationAddress' } }
|
|
|
|
##
|
|
# @migrate:
|
|
#
|
|
# Migrates the current running guest to another Virtual Machine.
|
|
#
|
|
# @uri: the Uniform Resource Identifier of the destination VM
|
|
#
|
|
# @channels: list of migration stream channels with each stream in the
|
|
# list connected to a destination interface endpoint.
|
|
#
|
|
# @blk: do block migration (full disk copy)
|
|
#
|
|
# @inc: incremental disk copy migration
|
|
#
|
|
# @detach: this argument exists only for compatibility reasons and is
|
|
# ignored by QEMU
|
|
#
|
|
# @resume: resume one paused migration, default "off". (since 3.0)
|
|
#
|
|
# Features:
|
|
#
|
|
# @deprecated: Members @inc and @blk are deprecated. Use
|
|
# blockdev-mirror with NBD instead.
|
|
#
|
|
# Returns: nothing on success
|
|
#
|
|
# Since: 0.14
|
|
#
|
|
# Notes:
|
|
#
|
|
# 1. The 'query-migrate' command should be used to check migration's
|
|
# progress and final result (this information is provided by the
|
|
# 'status' member)
|
|
#
|
|
# 2. All boolean arguments default to false
|
|
#
|
|
# 3. The user Monitor's "detach" argument is invalid in QMP and should
|
|
# not be used
|
|
#
|
|
# 4. The uri argument should have the Uniform Resource Identifier of
|
|
# default destination VM. This connection will be bound to default
|
|
# network.
|
|
#
|
|
# 5. For now, number of migration streams is restricted to one, i.e
|
|
# number of items in 'channels' list is just 1.
|
|
#
|
|
# 6. The 'uri' and 'channels' arguments are mutually exclusive;
|
|
# exactly one of the two should be present.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } }
|
|
# <- { "return": {} }
|
|
# -> { "execute": "migrate",
|
|
# "arguments": {
|
|
# "channels": [ { "channel-type": "main",
|
|
# "addr": { "transport": "socket",
|
|
# "type": "inet",
|
|
# "host": "10.12.34.9",
|
|
# "port": "1050" } } ] } }
|
|
# <- { "return": {} }
|
|
#
|
|
# -> { "execute": "migrate",
|
|
# "arguments": {
|
|
# "channels": [ { "channel-type": "main",
|
|
# "addr": { "transport": "exec",
|
|
# "args": [ "/bin/nc", "-p", "6000",
|
|
# "/some/sock" ] } } ] } }
|
|
# <- { "return": {} }
|
|
#
|
|
# -> { "execute": "migrate",
|
|
# "arguments": {
|
|
# "channels": [ { "channel-type": "main",
|
|
# "addr": { "transport": "rdma",
|
|
# "host": "10.12.34.9",
|
|
# "port": "1050" } } ] } }
|
|
# <- { "return": {} }
|
|
#
|
|
# -> { "execute": "migrate",
|
|
# "arguments": {
|
|
# "channels": [ { "channel-type": "main",
|
|
# "addr": { "transport": "file",
|
|
# "filename": "/tmp/migfile",
|
|
# "offset": "0x1000" } } ] } }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'migrate',
|
|
'data': {'uri': 'str',
|
|
'*channels': [ 'MigrationChannel' ],
|
|
'*blk': { 'type': 'bool', 'features': [ 'deprecated' ] },
|
|
'*inc': { 'type': 'bool', 'features': [ 'deprecated' ] },
|
|
'*detach': 'bool', '*resume': 'bool' } }
|
|
|
|
##
|
|
# @migrate-incoming:
|
|
#
|
|
# Start an incoming migration, the qemu must have been started with
|
|
# -incoming defer
|
|
#
|
|
# @uri: The Uniform Resource Identifier identifying the source or
|
|
# address to listen on
|
|
#
|
|
# @channels: list of migration stream channels with each stream in the
|
|
# list connected to a destination interface endpoint.
|
|
#
|
|
# Returns: nothing on success
|
|
#
|
|
# Since: 2.3
|
|
#
|
|
# Notes:
|
|
#
|
|
# 1. It's a bad idea to use a string for the uri, but it needs
|
|
# to stay compatible with -incoming and the format of the uri
|
|
# is already exposed above libvirt.
|
|
#
|
|
# 2. QEMU must be started with -incoming defer to allow
|
|
# migrate-incoming to be used.
|
|
#
|
|
# 3. The uri format is the same as for -incoming
|
|
#
|
|
# 5. For now, number of migration streams is restricted to one, i.e
|
|
# number of items in 'channels' list is just 1.
|
|
#
|
|
# 4. The 'uri' and 'channels' arguments are mutually exclusive;
|
|
# exactly one of the two should be present.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-incoming",
|
|
# "arguments": { "uri": "tcp::4446" } }
|
|
# <- { "return": {} }
|
|
#
|
|
# -> { "execute": "migrate",
|
|
# "arguments": {
|
|
# "channels": [ { "channel-type": "main",
|
|
# "addr": { "transport": "socket",
|
|
# "type": "inet",
|
|
# "host": "10.12.34.9",
|
|
# "port": "1050" } } ] } }
|
|
# <- { "return": {} }
|
|
#
|
|
# -> { "execute": "migrate",
|
|
# "arguments": {
|
|
# "channels": [ { "channel-type": "main",
|
|
# "addr": { "transport": "exec",
|
|
# "args": [ "/bin/nc", "-p", "6000",
|
|
# "/some/sock" ] } } ] } }
|
|
# <- { "return": {} }
|
|
#
|
|
# -> { "execute": "migrate",
|
|
# "arguments": {
|
|
# "channels": [ { "channel-type": "main",
|
|
# "addr": { "transport": "rdma",
|
|
# "host": "10.12.34.9",
|
|
# "port": "1050" } } ] } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'migrate-incoming',
|
|
'data': {'*uri': 'str',
|
|
'*channels': [ 'MigrationChannel' ] } }
|
|
|
|
##
|
|
# @xen-save-devices-state:
|
|
#
|
|
# Save the state of all devices to file. The RAM and the block
|
|
# devices of the VM are not saved by this command.
|
|
#
|
|
# @filename: the file to save the state of the devices to as binary
|
|
# data. See xen-save-devices-state.txt for a description of the
|
|
# binary format.
|
|
#
|
|
# @live: Optional argument to ask QEMU to treat this command as part
|
|
# of a live migration. Default to true. (since 2.11)
|
|
#
|
|
# Returns: Nothing on success
|
|
#
|
|
# Since: 1.1
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "xen-save-devices-state",
|
|
# "arguments": { "filename": "/tmp/save" } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'xen-save-devices-state',
|
|
'data': {'filename': 'str', '*live':'bool' } }
|
|
|
|
##
|
|
# @xen-set-global-dirty-log:
|
|
#
|
|
# Enable or disable the global dirty log mode.
|
|
#
|
|
# @enable: true to enable, false to disable.
|
|
#
|
|
# Returns: nothing
|
|
#
|
|
# Since: 1.3
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "xen-set-global-dirty-log",
|
|
# "arguments": { "enable": true } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'xen-set-global-dirty-log', 'data': { 'enable': 'bool' } }
|
|
|
|
##
|
|
# @xen-load-devices-state:
|
|
#
|
|
# Load the state of all devices from file. The RAM and the block
|
|
# devices of the VM are not loaded by this command.
|
|
#
|
|
# @filename: the file to load the state of the devices from as binary
|
|
# data. See xen-save-devices-state.txt for a description of the
|
|
# binary format.
|
|
#
|
|
# Since: 2.7
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "xen-load-devices-state",
|
|
# "arguments": { "filename": "/tmp/resume" } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'xen-load-devices-state', 'data': {'filename': 'str'} }
|
|
|
|
##
|
|
# @xen-set-replication:
|
|
#
|
|
# Enable or disable replication.
|
|
#
|
|
# @enable: true to enable, false to disable.
|
|
#
|
|
# @primary: true for primary or false for secondary.
|
|
#
|
|
# @failover: true to do failover, false to stop. but cannot be
|
|
# specified if 'enable' is true. default value is false.
|
|
#
|
|
# Returns: nothing.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "xen-set-replication",
|
|
# "arguments": {"enable": true, "primary": false} }
|
|
# <- { "return": {} }
|
|
#
|
|
# Since: 2.9
|
|
##
|
|
{ 'command': 'xen-set-replication',
|
|
'data': { 'enable': 'bool', 'primary': 'bool', '*failover': 'bool' },
|
|
'if': 'CONFIG_REPLICATION' }
|
|
|
|
##
|
|
# @ReplicationStatus:
|
|
#
|
|
# The result format for 'query-xen-replication-status'.
|
|
#
|
|
# @error: true if an error happened, false if replication is normal.
|
|
#
|
|
# @desc: the human readable error description string, when @error is
|
|
# 'true'.
|
|
#
|
|
# Since: 2.9
|
|
##
|
|
{ 'struct': 'ReplicationStatus',
|
|
'data': { 'error': 'bool', '*desc': 'str' },
|
|
'if': 'CONFIG_REPLICATION' }
|
|
|
|
##
|
|
# @query-xen-replication-status:
|
|
#
|
|
# Query replication status while the vm is running.
|
|
#
|
|
# Returns: A @ReplicationStatus object showing the status.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "query-xen-replication-status" }
|
|
# <- { "return": { "error": false } }
|
|
#
|
|
# Since: 2.9
|
|
##
|
|
{ 'command': 'query-xen-replication-status',
|
|
'returns': 'ReplicationStatus',
|
|
'if': 'CONFIG_REPLICATION' }
|
|
|
|
##
|
|
# @xen-colo-do-checkpoint:
|
|
#
|
|
# Xen uses this command to notify replication to trigger a checkpoint.
|
|
#
|
|
# Returns: nothing.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "xen-colo-do-checkpoint" }
|
|
# <- { "return": {} }
|
|
#
|
|
# Since: 2.9
|
|
##
|
|
{ 'command': 'xen-colo-do-checkpoint',
|
|
'if': 'CONFIG_REPLICATION' }
|
|
|
|
##
|
|
# @COLOStatus:
|
|
#
|
|
# The result format for 'query-colo-status'.
|
|
#
|
|
# @mode: COLO running mode. If COLO is running, this field will
|
|
# return 'primary' or 'secondary'.
|
|
#
|
|
# @last-mode: COLO last running mode. If COLO is running, this field
|
|
# will return same like mode field, after failover we can use this
|
|
# field to get last colo mode. (since 4.0)
|
|
#
|
|
# @reason: describes the reason for the COLO exit.
|
|
#
|
|
# Since: 3.1
|
|
##
|
|
{ 'struct': 'COLOStatus',
|
|
'data': { 'mode': 'COLOMode', 'last-mode': 'COLOMode',
|
|
'reason': 'COLOExitReason' },
|
|
'if': 'CONFIG_REPLICATION' }
|
|
|
|
##
|
|
# @query-colo-status:
|
|
#
|
|
# Query COLO status while the vm is running.
|
|
#
|
|
# Returns: A @COLOStatus object showing the status.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "query-colo-status" }
|
|
# <- { "return": { "mode": "primary", "last-mode": "none", "reason": "request" } }
|
|
#
|
|
# Since: 3.1
|
|
##
|
|
{ 'command': 'query-colo-status',
|
|
'returns': 'COLOStatus',
|
|
'if': 'CONFIG_REPLICATION' }
|
|
|
|
##
|
|
# @migrate-recover:
|
|
#
|
|
# Provide a recovery migration stream URI.
|
|
#
|
|
# @uri: the URI to be used for the recovery of migration stream.
|
|
#
|
|
# Returns: nothing.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-recover",
|
|
# "arguments": { "uri": "tcp:192.168.1.200:12345" } }
|
|
# <- { "return": {} }
|
|
#
|
|
# Since: 3.0
|
|
##
|
|
{ 'command': 'migrate-recover',
|
|
'data': { 'uri': 'str' },
|
|
'allow-oob': true }
|
|
|
|
##
|
|
# @migrate-pause:
|
|
#
|
|
# Pause a migration. Currently it only supports postcopy.
|
|
#
|
|
# Returns: nothing.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-pause" }
|
|
# <- { "return": {} }
|
|
#
|
|
# Since: 3.0
|
|
##
|
|
{ 'command': 'migrate-pause', 'allow-oob': true }
|
|
|
|
##
|
|
# @UNPLUG_PRIMARY:
|
|
#
|
|
# Emitted from source side of a migration when migration state is
|
|
# WAIT_UNPLUG. Device was unplugged by guest operating system. Device
|
|
# resources in QEMU are kept on standby to be able to re-plug it in
|
|
# case of migration failure.
|
|
#
|
|
# @device-id: QEMU device id of the unplugged device
|
|
#
|
|
# Since: 4.2
|
|
#
|
|
# Example:
|
|
#
|
|
# <- { "event": "UNPLUG_PRIMARY",
|
|
# "data": { "device-id": "hostdev0" },
|
|
# "timestamp": { "seconds": 1265044230, "microseconds": 450486 } }
|
|
##
|
|
{ 'event': 'UNPLUG_PRIMARY',
|
|
'data': { 'device-id': 'str' } }
|
|
|
|
##
|
|
# @DirtyRateVcpu:
|
|
#
|
|
# Dirty rate of vcpu.
|
|
#
|
|
# @id: vcpu index.
|
|
#
|
|
# @dirty-rate: dirty rate.
|
|
#
|
|
# Since: 6.2
|
|
##
|
|
{ 'struct': 'DirtyRateVcpu',
|
|
'data': { 'id': 'int', 'dirty-rate': 'int64' } }
|
|
|
|
##
|
|
# @DirtyRateStatus:
|
|
#
|
|
# Dirty page rate measurement status.
|
|
#
|
|
# @unstarted: measuring thread has not been started yet
|
|
#
|
|
# @measuring: measuring thread is running
|
|
#
|
|
# @measured: dirty page rate is measured and the results are available
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'enum': 'DirtyRateStatus',
|
|
'data': [ 'unstarted', 'measuring', 'measured'] }
|
|
|
|
##
|
|
# @DirtyRateMeasureMode:
|
|
#
|
|
# Method used to measure dirty page rate. Differences between
|
|
# available methods are explained in @calc-dirty-rate.
|
|
#
|
|
# @page-sampling: use page sampling
|
|
#
|
|
# @dirty-ring: use dirty ring
|
|
#
|
|
# @dirty-bitmap: use dirty bitmap
|
|
#
|
|
# Since: 6.2
|
|
##
|
|
{ 'enum': 'DirtyRateMeasureMode',
|
|
'data': ['page-sampling', 'dirty-ring', 'dirty-bitmap'] }
|
|
|
|
##
|
|
# @TimeUnit:
|
|
#
|
|
# Specifies unit in which time-related value is specified.
|
|
#
|
|
# @second: value is in seconds
|
|
#
|
|
# @millisecond: value is in milliseconds
|
|
#
|
|
# Since 8.2
|
|
#
|
|
##
|
|
{ 'enum': 'TimeUnit',
|
|
'data': ['second', 'millisecond'] }
|
|
|
|
##
|
|
# @DirtyRateInfo:
|
|
#
|
|
# Information about measured dirty page rate.
|
|
#
|
|
# @dirty-rate: an estimate of the dirty page rate of the VM in units
|
|
# of MiB/s. Value is present only when @status is 'measured'.
|
|
#
|
|
# @status: current status of dirty page rate measurements
|
|
#
|
|
# @start-time: start time in units of second for calculation
|
|
#
|
|
# @calc-time: time period for which dirty page rate was measured,
|
|
# expressed and rounded down to @calc-time-unit.
|
|
#
|
|
# @calc-time-unit: time unit of @calc-time (Since 8.2)
|
|
#
|
|
# @sample-pages: number of sampled pages per GiB of guest memory.
|
|
# Valid only in page-sampling mode (Since 6.1)
|
|
#
|
|
# @mode: mode that was used to measure dirty page rate (Since 6.2)
|
|
#
|
|
# @vcpu-dirty-rate: dirty rate for each vCPU if dirty-ring mode was
|
|
# specified (Since 6.2)
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'struct': 'DirtyRateInfo',
|
|
'data': {'*dirty-rate': 'int64',
|
|
'status': 'DirtyRateStatus',
|
|
'start-time': 'int64',
|
|
'calc-time': 'int64',
|
|
'calc-time-unit': 'TimeUnit',
|
|
'sample-pages': 'uint64',
|
|
'mode': 'DirtyRateMeasureMode',
|
|
'*vcpu-dirty-rate': [ 'DirtyRateVcpu' ] } }
|
|
|
|
##
|
|
# @calc-dirty-rate:
|
|
#
|
|
# Start measuring dirty page rate of the VM. Results can be retrieved
|
|
# with @query-dirty-rate after measurements are completed.
|
|
#
|
|
# Dirty page rate is the number of pages changed in a given time
|
|
# period expressed in MiB/s. The following methods of calculation are
|
|
# available:
|
|
#
|
|
# 1. In page sampling mode, a random subset of pages are selected and
|
|
# hashed twice: once at the beginning of measurement time period,
|
|
# and once again at the end. If two hashes for some page are
|
|
# different, the page is counted as changed. Since this method
|
|
# relies on sampling and hashing, calculated dirty page rate is
|
|
# only an estimate of its true value. Increasing @sample-pages
|
|
# improves estimation quality at the cost of higher computational
|
|
# overhead.
|
|
#
|
|
# 2. Dirty bitmap mode captures writes to memory (for example by
|
|
# temporarily revoking write access to all pages) and counting page
|
|
# faults. Information about modified pages is collected into a
|
|
# bitmap, where each bit corresponds to one guest page. This mode
|
|
# requires that KVM accelerator property "dirty-ring-size" is *not*
|
|
# set.
|
|
#
|
|
# 3. Dirty ring mode is similar to dirty bitmap mode, but the
|
|
# information about modified pages is collected into ring buffer.
|
|
# This mode tracks page modification per each vCPU separately. It
|
|
# requires that KVM accelerator property "dirty-ring-size" is set.
|
|
#
|
|
# @calc-time: time period for which dirty page rate is calculated.
|
|
# By default it is specified in seconds, but the unit can be set
|
|
# explicitly with @calc-time-unit. Note that larger @calc-time
|
|
# values will typically result in smaller dirty page rates because
|
|
# page dirtying is a one-time event. Once some page is counted
|
|
# as dirty during @calc-time period, further writes to this page
|
|
# will not increase dirty page rate anymore.
|
|
#
|
|
# @calc-time-unit: time unit in which @calc-time is specified.
|
|
# By default it is seconds. (Since 8.2)
|
|
#
|
|
# @sample-pages: number of sampled pages per each GiB of guest memory.
|
|
# Default value is 512. For 4KiB guest pages this corresponds to
|
|
# sampling ratio of 0.2%. This argument is used only in page
|
|
# sampling mode. (Since 6.1)
|
|
#
|
|
# @mode: mechanism for tracking dirty pages. Default value is
|
|
# 'page-sampling'. Others are 'dirty-bitmap' and 'dirty-ring'.
|
|
# (Since 6.1)
|
|
#
|
|
# Since: 5.2
|
|
#
|
|
# Example:
|
|
#
|
|
# -> {"execute": "calc-dirty-rate", "arguments": {"calc-time": 1,
|
|
# 'sample-pages': 512} }
|
|
# <- { "return": {} }
|
|
#
|
|
# Measure dirty rate using dirty bitmap for 500 milliseconds:
|
|
#
|
|
# -> {"execute": "calc-dirty-rate", "arguments": {"calc-time": 500,
|
|
# "calc-time-unit": "millisecond", "mode": "dirty-bitmap"} }
|
|
#
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64',
|
|
'*calc-time-unit': 'TimeUnit',
|
|
'*sample-pages': 'int',
|
|
'*mode': 'DirtyRateMeasureMode'} }
|
|
|
|
##
|
|
# @query-dirty-rate:
|
|
#
|
|
# Query results of the most recent invocation of @calc-dirty-rate.
|
|
#
|
|
# @calc-time-unit: time unit in which to report calculation time.
|
|
# By default it is reported in seconds. (Since 8.2)
|
|
#
|
|
# Since: 5.2
|
|
#
|
|
# Examples:
|
|
#
|
|
# 1. Measurement is in progress:
|
|
#
|
|
# <- {"status": "measuring", "sample-pages": 512,
|
|
# "mode": "page-sampling", "start-time": 1693900454, "calc-time": 10,
|
|
# "calc-time-unit": "second"}
|
|
#
|
|
# 2. Measurement has been completed:
|
|
#
|
|
# <- {"status": "measured", "sample-pages": 512, "dirty-rate": 108,
|
|
# "mode": "page-sampling", "start-time": 1693900454, "calc-time": 10,
|
|
# "calc-time-unit": "second"}
|
|
##
|
|
{ 'command': 'query-dirty-rate', 'data': {'*calc-time-unit': 'TimeUnit' },
|
|
'returns': 'DirtyRateInfo' }
|
|
|
|
##
|
|
# @DirtyLimitInfo:
|
|
#
|
|
# Dirty page rate limit information of a virtual CPU.
|
|
#
|
|
# @cpu-index: index of a virtual CPU.
|
|
#
|
|
# @limit-rate: upper limit of dirty page rate (MB/s) for a virtual
|
|
# CPU, 0 means unlimited.
|
|
#
|
|
# @current-rate: current dirty page rate (MB/s) for a virtual CPU.
|
|
#
|
|
# Since: 7.1
|
|
##
|
|
{ 'struct': 'DirtyLimitInfo',
|
|
'data': { 'cpu-index': 'int',
|
|
'limit-rate': 'uint64',
|
|
'current-rate': 'uint64' } }
|
|
|
|
##
|
|
# @set-vcpu-dirty-limit:
|
|
#
|
|
# Set the upper limit of dirty page rate for virtual CPUs.
|
|
#
|
|
# Requires KVM with accelerator property "dirty-ring-size" set. A
|
|
# virtual CPU's dirty page rate is a measure of its memory load. To
|
|
# observe dirty page rates, use @calc-dirty-rate.
|
|
#
|
|
# @cpu-index: index of a virtual CPU, default is all.
|
|
#
|
|
# @dirty-rate: upper limit of dirty page rate (MB/s) for virtual CPUs.
|
|
#
|
|
# Since: 7.1
|
|
#
|
|
# Example:
|
|
#
|
|
# -> {"execute": "set-vcpu-dirty-limit"}
|
|
# "arguments": { "dirty-rate": 200,
|
|
# "cpu-index": 1 } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'set-vcpu-dirty-limit',
|
|
'data': { '*cpu-index': 'int',
|
|
'dirty-rate': 'uint64' } }
|
|
|
|
##
|
|
# @cancel-vcpu-dirty-limit:
|
|
#
|
|
# Cancel the upper limit of dirty page rate for virtual CPUs.
|
|
#
|
|
# Cancel the dirty page limit for the vCPU which has been set with
|
|
# set-vcpu-dirty-limit command. Note that this command requires
|
|
# support from dirty ring, same as the "set-vcpu-dirty-limit".
|
|
#
|
|
# @cpu-index: index of a virtual CPU, default is all.
|
|
#
|
|
# Since: 7.1
|
|
#
|
|
# Example:
|
|
#
|
|
# -> {"execute": "cancel-vcpu-dirty-limit"},
|
|
# "arguments": { "cpu-index": 1 } }
|
|
# <- { "return": {} }
|
|
##
|
|
{ 'command': 'cancel-vcpu-dirty-limit',
|
|
'data': { '*cpu-index': 'int'} }
|
|
|
|
##
|
|
# @query-vcpu-dirty-limit:
|
|
#
|
|
# Returns information about virtual CPU dirty page rate limits, if
|
|
# any.
|
|
#
|
|
# Since: 7.1
|
|
#
|
|
# Example:
|
|
#
|
|
# -> {"execute": "query-vcpu-dirty-limit"}
|
|
# <- {"return": [
|
|
# { "limit-rate": 60, "current-rate": 3, "cpu-index": 0},
|
|
# { "limit-rate": 60, "current-rate": 3, "cpu-index": 1}]}
|
|
##
|
|
{ 'command': 'query-vcpu-dirty-limit',
|
|
'returns': [ 'DirtyLimitInfo' ] }
|
|
|
|
##
|
|
# @MigrationThreadInfo:
|
|
#
|
|
# Information about migrationthreads
|
|
#
|
|
# @name: the name of migration thread
|
|
#
|
|
# @thread-id: ID of the underlying host thread
|
|
#
|
|
# Since: 7.2
|
|
##
|
|
{ 'struct': 'MigrationThreadInfo',
|
|
'data': {'name': 'str',
|
|
'thread-id': 'int'} }
|
|
|
|
##
|
|
# @query-migrationthreads:
|
|
#
|
|
# Returns information of migration threads
|
|
#
|
|
# data: migration thread name
|
|
#
|
|
# Returns: information about migration threads
|
|
#
|
|
# Since: 7.2
|
|
##
|
|
{ 'command': 'query-migrationthreads',
|
|
'returns': ['MigrationThreadInfo'] }
|
|
|
|
##
|
|
# @snapshot-save:
|
|
#
|
|
# Save a VM snapshot
|
|
#
|
|
# @job-id: identifier for the newly created job
|
|
#
|
|
# @tag: name of the snapshot to create
|
|
#
|
|
# @vmstate: block device node name to save vmstate to
|
|
#
|
|
# @devices: list of block device node names to save a snapshot to
|
|
#
|
|
# Applications should not assume that the snapshot save is complete
|
|
# when this command returns. The job commands / events must be used
|
|
# to determine completion and to fetch details of any errors that
|
|
# arise.
|
|
#
|
|
# Note that execution of the guest CPUs may be stopped during the time
|
|
# it takes to save the snapshot. A future version of QEMU may ensure
|
|
# CPUs are executing continuously.
|
|
#
|
|
# It is strongly recommended that @devices contain all writable block
|
|
# device nodes if a consistent snapshot is required.
|
|
#
|
|
# If @tag already exists, an error will be reported
|
|
#
|
|
# Returns: nothing
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "snapshot-save",
|
|
# "arguments": {
|
|
# "job-id": "snapsave0",
|
|
# "tag": "my-snap",
|
|
# "vmstate": "disk0",
|
|
# "devices": ["disk0", "disk1"]
|
|
# }
|
|
# }
|
|
# <- { "return": { } }
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1432121972, "microseconds": 744001},
|
|
# "data": {"status": "created", "id": "snapsave0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1432122172, "microseconds": 744001},
|
|
# "data": {"status": "running", "id": "snapsave0"}}
|
|
# <- {"event": "STOP",
|
|
# "timestamp": {"seconds": 1432122372, "microseconds": 744001} }
|
|
# <- {"event": "RESUME",
|
|
# "timestamp": {"seconds": 1432122572, "microseconds": 744001} }
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1432122772, "microseconds": 744001},
|
|
# "data": {"status": "waiting", "id": "snapsave0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1432122972, "microseconds": 744001},
|
|
# "data": {"status": "pending", "id": "snapsave0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1432123172, "microseconds": 744001},
|
|
# "data": {"status": "concluded", "id": "snapsave0"}}
|
|
# -> {"execute": "query-jobs"}
|
|
# <- {"return": [{"current-progress": 1,
|
|
# "status": "concluded",
|
|
# "total-progress": 1,
|
|
# "type": "snapshot-save",
|
|
# "id": "snapsave0"}]}
|
|
#
|
|
# Since: 6.0
|
|
##
|
|
{ 'command': 'snapshot-save',
|
|
'data': { 'job-id': 'str',
|
|
'tag': 'str',
|
|
'vmstate': 'str',
|
|
'devices': ['str'] } }
|
|
|
|
##
|
|
# @snapshot-load:
|
|
#
|
|
# Load a VM snapshot
|
|
#
|
|
# @job-id: identifier for the newly created job
|
|
#
|
|
# @tag: name of the snapshot to load.
|
|
#
|
|
# @vmstate: block device node name to load vmstate from
|
|
#
|
|
# @devices: list of block device node names to load a snapshot from
|
|
#
|
|
# Applications should not assume that the snapshot load is complete
|
|
# when this command returns. The job commands / events must be used
|
|
# to determine completion and to fetch details of any errors that
|
|
# arise.
|
|
#
|
|
# Note that execution of the guest CPUs will be stopped during the
|
|
# time it takes to load the snapshot.
|
|
#
|
|
# It is strongly recommended that @devices contain all writable block
|
|
# device nodes that can have changed since the original @snapshot-save
|
|
# command execution.
|
|
#
|
|
# Returns: nothing
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "snapshot-load",
|
|
# "arguments": {
|
|
# "job-id": "snapload0",
|
|
# "tag": "my-snap",
|
|
# "vmstate": "disk0",
|
|
# "devices": ["disk0", "disk1"]
|
|
# }
|
|
# }
|
|
# <- { "return": { } }
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1472124172, "microseconds": 744001},
|
|
# "data": {"status": "created", "id": "snapload0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1472125172, "microseconds": 744001},
|
|
# "data": {"status": "running", "id": "snapload0"}}
|
|
# <- {"event": "STOP",
|
|
# "timestamp": {"seconds": 1472125472, "microseconds": 744001} }
|
|
# <- {"event": "RESUME",
|
|
# "timestamp": {"seconds": 1472125872, "microseconds": 744001} }
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1472126172, "microseconds": 744001},
|
|
# "data": {"status": "waiting", "id": "snapload0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1472127172, "microseconds": 744001},
|
|
# "data": {"status": "pending", "id": "snapload0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1472128172, "microseconds": 744001},
|
|
# "data": {"status": "concluded", "id": "snapload0"}}
|
|
# -> {"execute": "query-jobs"}
|
|
# <- {"return": [{"current-progress": 1,
|
|
# "status": "concluded",
|
|
# "total-progress": 1,
|
|
# "type": "snapshot-load",
|
|
# "id": "snapload0"}]}
|
|
#
|
|
# Since: 6.0
|
|
##
|
|
{ 'command': 'snapshot-load',
|
|
'data': { 'job-id': 'str',
|
|
'tag': 'str',
|
|
'vmstate': 'str',
|
|
'devices': ['str'] } }
|
|
|
|
##
|
|
# @snapshot-delete:
|
|
#
|
|
# Delete a VM snapshot
|
|
#
|
|
# @job-id: identifier for the newly created job
|
|
#
|
|
# @tag: name of the snapshot to delete.
|
|
#
|
|
# @devices: list of block device node names to delete a snapshot from
|
|
#
|
|
# Applications should not assume that the snapshot delete is complete
|
|
# when this command returns. The job commands / events must be used
|
|
# to determine completion and to fetch details of any errors that
|
|
# arise.
|
|
#
|
|
# Returns: nothing
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "snapshot-delete",
|
|
# "arguments": {
|
|
# "job-id": "snapdelete0",
|
|
# "tag": "my-snap",
|
|
# "devices": ["disk0", "disk1"]
|
|
# }
|
|
# }
|
|
# <- { "return": { } }
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1442124172, "microseconds": 744001},
|
|
# "data": {"status": "created", "id": "snapdelete0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1442125172, "microseconds": 744001},
|
|
# "data": {"status": "running", "id": "snapdelete0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1442126172, "microseconds": 744001},
|
|
# "data": {"status": "waiting", "id": "snapdelete0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1442127172, "microseconds": 744001},
|
|
# "data": {"status": "pending", "id": "snapdelete0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "timestamp": {"seconds": 1442128172, "microseconds": 744001},
|
|
# "data": {"status": "concluded", "id": "snapdelete0"}}
|
|
# -> {"execute": "query-jobs"}
|
|
# <- {"return": [{"current-progress": 1,
|
|
# "status": "concluded",
|
|
# "total-progress": 1,
|
|
# "type": "snapshot-delete",
|
|
# "id": "snapdelete0"}]}
|
|
#
|
|
# Since: 6.0
|
|
##
|
|
{ 'command': 'snapshot-delete',
|
|
'data': { 'job-id': 'str',
|
|
'tag': 'str',
|
|
'devices': ['str'] } }
|