0fb86605ea
Indicates how many pages we are going to send in each batch to a multifd thread. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> -- Be consistent with defaults and documentation Use new DEFINE_PROP_* Rename x-multifd-group to x-multifd-page-count
1117 lines
33 KiB
Python
1117 lines
33 KiB
Python
# -*- Mode: Python -*-
|
|
#
|
|
|
|
##
|
|
# = Migration
|
|
##
|
|
|
|
{ 'include': 'common.json' }
|
|
|
|
##
|
|
# @MigrationStats:
|
|
#
|
|
# Detailed migration status.
|
|
#
|
|
# @transferred: amount of bytes already transferred to the target VM
|
|
#
|
|
# @remaining: amount of bytes remaining to be transferred to the target VM
|
|
#
|
|
# @total: total amount of bytes involved in the migration process
|
|
#
|
|
# @duplicate: number of duplicate (zero) pages (since 1.2)
|
|
#
|
|
# @skipped: number of skipped zero pages (since 1.5)
|
|
#
|
|
# @normal: number of normal pages (since 1.2)
|
|
#
|
|
# @normal-bytes: number of normal bytes sent (since 1.2)
|
|
#
|
|
# @dirty-pages-rate: number of pages dirtied by second by the
|
|
# guest (since 1.3)
|
|
#
|
|
# @mbps: throughput in megabits/sec. (since 1.6)
|
|
#
|
|
# @dirty-sync-count: number of times that dirty ram was synchronized (since 2.1)
|
|
#
|
|
# @postcopy-requests: The number of page requests received from the destination
|
|
# (since 2.7)
|
|
#
|
|
# @page-size: The number of bytes per page for the various page-based
|
|
# statistics (since 2.10)
|
|
#
|
|
# Since: 0.14.0
|
|
##
|
|
{ 'struct': 'MigrationStats',
|
|
'data': {'transferred': 'int', 'remaining': 'int', 'total': 'int' ,
|
|
'duplicate': 'int', 'skipped': 'int', 'normal': 'int',
|
|
'normal-bytes': 'int', 'dirty-pages-rate' : 'int',
|
|
'mbps' : 'number', 'dirty-sync-count' : 'int',
|
|
'postcopy-requests' : 'int', 'page-size' : 'int' } }
|
|
|
|
##
|
|
# @XBZRLECacheStats:
|
|
#
|
|
# Detailed XBZRLE migration cache statistics
|
|
#
|
|
# @cache-size: XBZRLE cache size
|
|
#
|
|
# @bytes: amount of bytes already transferred to the target VM
|
|
#
|
|
# @pages: amount of pages transferred to the target VM
|
|
#
|
|
# @cache-miss: number of cache miss
|
|
#
|
|
# @cache-miss-rate: rate of cache miss (since 2.1)
|
|
#
|
|
# @overflow: number of overflows
|
|
#
|
|
# Since: 1.2
|
|
##
|
|
{ 'struct': 'XBZRLECacheStats',
|
|
'data': {'cache-size': 'int', 'bytes': 'int', 'pages': 'int',
|
|
'cache-miss': 'int', 'cache-miss-rate': 'number',
|
|
'overflow': 'int' } }
|
|
|
|
##
|
|
# @MigrationStatus:
|
|
#
|
|
# An enumeration of migration status.
|
|
#
|
|
# @none: no migration has ever happened.
|
|
#
|
|
# @setup: migration process has been initiated.
|
|
#
|
|
# @cancelling: in the process of cancelling migration.
|
|
#
|
|
# @cancelled: cancelling migration is finished.
|
|
#
|
|
# @active: in the process of doing migration.
|
|
#
|
|
# @postcopy-active: like active, but now in postcopy mode. (since 2.5)
|
|
#
|
|
# @completed: migration is finished.
|
|
#
|
|
# @failed: some error occurred during migration process.
|
|
#
|
|
# @colo: VM is in the process of fault tolerance, VM can not get into this
|
|
# state unless colo capability is enabled for migration. (since 2.8)
|
|
#
|
|
# Since: 2.3
|
|
#
|
|
##
|
|
{ 'enum': 'MigrationStatus',
|
|
'data': [ 'none', 'setup', 'cancelling', 'cancelled',
|
|
'active', 'postcopy-active', 'completed', 'failed', 'colo' ] }
|
|
|
|
##
|
|
# @MigrationInfo:
|
|
#
|
|
# Information about current migration process.
|
|
#
|
|
# @status: @MigrationStatus describing the current migration status.
|
|
# If this field is not returned, no migration process
|
|
# has been initiated
|
|
#
|
|
# @ram: @MigrationStats containing detailed migration
|
|
# status, only returned if status is 'active' or
|
|
# 'completed'(since 1.2)
|
|
#
|
|
# @disk: @MigrationStats containing detailed disk migration
|
|
# status, only returned if status is 'active' and it is a block
|
|
# migration
|
|
#
|
|
# @xbzrle-cache: @XBZRLECacheStats containing detailed XBZRLE
|
|
# migration statistics, only returned if XBZRLE feature is on and
|
|
# status is 'active' or 'completed' (since 1.2)
|
|
#
|
|
# @total-time: total amount of milliseconds since migration started.
|
|
# If migration has ended, it returns the total migration
|
|
# time. (since 1.2)
|
|
#
|
|
# @downtime: only present when migration finishes correctly
|
|
# total downtime in milliseconds for the guest.
|
|
# (since 1.3)
|
|
#
|
|
# @expected-downtime: only present while migration is active
|
|
# expected downtime in milliseconds for the guest in last walk
|
|
# of the dirty bitmap. (since 1.3)
|
|
#
|
|
# @setup-time: amount of setup time in milliseconds _before_ the
|
|
# iterations begin but _after_ the QMP command is issued. This is designed
|
|
# to provide an accounting of any activities (such as RDMA pinning) which
|
|
# may be expensive, but do not actually occur during the iterative
|
|
# migration rounds themselves. (since 1.6)
|
|
#
|
|
# @cpu-throttle-percentage: percentage of time guest cpus are being
|
|
# throttled during auto-converge. This is only present when auto-converge
|
|
# has started throttling guest cpus. (Since 2.7)
|
|
#
|
|
# @error-desc: the human readable error description string, when
|
|
# @status is 'failed'. Clients should not attempt to parse the
|
|
# error strings. (Since 2.7)
|
|
#
|
|
# Since: 0.14.0
|
|
##
|
|
{ 'struct': 'MigrationInfo',
|
|
'data': {'*status': 'MigrationStatus', '*ram': 'MigrationStats',
|
|
'*disk': 'MigrationStats',
|
|
'*xbzrle-cache': 'XBZRLECacheStats',
|
|
'*total-time': 'int',
|
|
'*expected-downtime': 'int',
|
|
'*downtime': 'int',
|
|
'*setup-time': 'int',
|
|
'*cpu-throttle-percentage': 'int',
|
|
'*error-desc': 'str'} }
|
|
|
|
##
|
|
# @query-migrate:
|
|
#
|
|
# Returns information about current migration process. If migration
|
|
# is active there will be another json-object with RAM migration
|
|
# status and if block migration is active another one with block
|
|
# migration status.
|
|
#
|
|
# Returns: @MigrationInfo
|
|
#
|
|
# Since: 0.14.0
|
|
#
|
|
# Example:
|
|
#
|
|
# 1. Before the first migration
|
|
#
|
|
# -> { "execute": "query-migrate" }
|
|
# <- { "return": {} }
|
|
#
|
|
# 2. Migration is done and has succeeded
|
|
#
|
|
# -> { "execute": "query-migrate" }
|
|
# <- { "return": {
|
|
# "status": "completed",
|
|
# "ram":{
|
|
# "transferred":123,
|
|
# "remaining":123,
|
|
# "total":246,
|
|
# "total-time":12345,
|
|
# "setup-time":12345,
|
|
# "downtime":12345,
|
|
# "duplicate":123,
|
|
# "normal":123,
|
|
# "normal-bytes":123456,
|
|
# "dirty-sync-count":15
|
|
# }
|
|
# }
|
|
# }
|
|
#
|
|
# 3. Migration is done and has failed
|
|
#
|
|
# -> { "execute": "query-migrate" }
|
|
# <- { "return": { "status": "failed" } }
|
|
#
|
|
# 4. Migration is being performed and is not a block migration:
|
|
#
|
|
# -> { "execute": "query-migrate" }
|
|
# <- {
|
|
# "return":{
|
|
# "status":"active",
|
|
# "ram":{
|
|
# "transferred":123,
|
|
# "remaining":123,
|
|
# "total":246,
|
|
# "total-time":12345,
|
|
# "setup-time":12345,
|
|
# "expected-downtime":12345,
|
|
# "duplicate":123,
|
|
# "normal":123,
|
|
# "normal-bytes":123456,
|
|
# "dirty-sync-count":15
|
|
# }
|
|
# }
|
|
# }
|
|
#
|
|
# 5. Migration is being performed and is a block migration:
|
|
#
|
|
# -> { "execute": "query-migrate" }
|
|
# <- {
|
|
# "return":{
|
|
# "status":"active",
|
|
# "ram":{
|
|
# "total":1057024,
|
|
# "remaining":1053304,
|
|
# "transferred":3720,
|
|
# "total-time":12345,
|
|
# "setup-time":12345,
|
|
# "expected-downtime":12345,
|
|
# "duplicate":123,
|
|
# "normal":123,
|
|
# "normal-bytes":123456,
|
|
# "dirty-sync-count":15
|
|
# },
|
|
# "disk":{
|
|
# "total":20971520,
|
|
# "remaining":20880384,
|
|
# "transferred":91136
|
|
# }
|
|
# }
|
|
# }
|
|
#
|
|
# 6. Migration is being performed and XBZRLE is active:
|
|
#
|
|
# -> { "execute": "query-migrate" }
|
|
# <- {
|
|
# "return":{
|
|
# "status":"active",
|
|
# "capabilities" : [ { "capability": "xbzrle", "state" : true } ],
|
|
# "ram":{
|
|
# "total":1057024,
|
|
# "remaining":1053304,
|
|
# "transferred":3720,
|
|
# "total-time":12345,
|
|
# "setup-time":12345,
|
|
# "expected-downtime":12345,
|
|
# "duplicate":10,
|
|
# "normal":3333,
|
|
# "normal-bytes":3412992,
|
|
# "dirty-sync-count":15
|
|
# },
|
|
# "xbzrle-cache":{
|
|
# "cache-size":67108864,
|
|
# "bytes":20971520,
|
|
# "pages":2444343,
|
|
# "cache-miss":2244,
|
|
# "cache-miss-rate":0.123,
|
|
# "overflow":34434
|
|
# }
|
|
# }
|
|
# }
|
|
#
|
|
##
|
|
{ 'command': 'query-migrate', 'returns': 'MigrationInfo' }
|
|
|
|
##
|
|
# @MigrationCapability:
|
|
#
|
|
# Migration capabilities enumeration
|
|
#
|
|
# @xbzrle: Migration supports xbzrle (Xor Based Zero Run Length Encoding).
|
|
# This feature allows us to minimize migration traffic for certain work
|
|
# loads, by sending compressed difference of the pages
|
|
#
|
|
# @rdma-pin-all: Controls whether or not the entire VM memory footprint is
|
|
# mlock()'d on demand or all at once. Refer to docs/rdma.txt for usage.
|
|
# Disabled by default. (since 2.0)
|
|
#
|
|
# @zero-blocks: During storage migration encode blocks of zeroes efficiently. This
|
|
# essentially saves 1MB of zeroes per block on the wire. Enabling requires
|
|
# source and target VM to support this feature. To enable it is sufficient
|
|
# to enable the capability on the source VM. The feature is disabled by
|
|
# default. (since 1.6)
|
|
#
|
|
# @compress: Use multiple compression threads to accelerate live migration.
|
|
# This feature can help to reduce the migration traffic, by sending
|
|
# compressed pages. Please note that if compress and xbzrle are both
|
|
# on, compress only takes effect in the ram bulk stage, after that,
|
|
# it will be disabled and only xbzrle takes effect, this can help to
|
|
# minimize migration traffic. The feature is disabled by default.
|
|
# (since 2.4 )
|
|
#
|
|
# @events: generate events for each migration state change
|
|
# (since 2.4 )
|
|
#
|
|
# @auto-converge: If enabled, QEMU will automatically throttle down the guest
|
|
# to speed up convergence of RAM migration. (since 1.6)
|
|
#
|
|
# @postcopy-ram: Start executing on the migration target before all of RAM has
|
|
# been migrated, pulling the remaining pages along as needed. NOTE: If
|
|
# the migration fails during postcopy the VM will fail. (since 2.6)
|
|
#
|
|
# @x-colo: If enabled, migration will never end, and the state of the VM on the
|
|
# primary side will be migrated continuously to the VM on secondary
|
|
# side, this process is called COarse-Grain LOck Stepping (COLO) for
|
|
# Non-stop Service. (since 2.8)
|
|
#
|
|
# @release-ram: if enabled, qemu will free the migrated ram pages on the source
|
|
# during postcopy-ram migration. (since 2.9)
|
|
#
|
|
# @block: If enabled, QEMU will also migrate the contents of all block
|
|
# devices. Default is disabled. A possible alternative uses
|
|
# mirror jobs to a builtin NBD server on the destination, which
|
|
# offers more flexibility.
|
|
# (Since 2.10)
|
|
#
|
|
# @return-path: If enabled, migration will use the return path even
|
|
# for precopy. (since 2.10)
|
|
#
|
|
# @x-multifd: Use more than one fd for migration (since 2.11)
|
|
#
|
|
# Since: 1.2
|
|
##
|
|
{ 'enum': 'MigrationCapability',
|
|
'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
|
|
'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram',
|
|
'block', 'return-path', 'x-multifd' ] }
|
|
|
|
##
|
|
# @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 } ] } }
|
|
#
|
|
##
|
|
{ 'command': 'migrate-set-capabilities',
|
|
'data': { 'capabilities': ['MigrationCapabilityStatus'] } }
|
|
|
|
##
|
|
# @query-migrate-capabilities:
|
|
#
|
|
# Returns information about the current migration capabilities status
|
|
#
|
|
# Returns: @MigrationCapabilitiesStatus
|
|
#
|
|
# 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']}
|
|
|
|
##
|
|
# @MigrationParameter:
|
|
#
|
|
# Migration parameters enumeration
|
|
#
|
|
# @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.
|
|
#
|
|
# @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.
|
|
#
|
|
# @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)
|
|
#
|
|
# @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)
|
|
#
|
|
# @max-bandwidth: to set maximum speed for migration. maximum speed in
|
|
# bytes per second. (Since 2.8)
|
|
#
|
|
# @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)
|
|
#
|
|
# @x-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 2.11)
|
|
#
|
|
# @x-multifd-page-count: Number of pages sent together to a thread
|
|
# The default value is 16 (since 2.11)
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
{ 'enum': 'MigrationParameter',
|
|
'data': ['compress-level', 'compress-threads', 'decompress-threads',
|
|
'cpu-throttle-initial', 'cpu-throttle-increment',
|
|
'tls-creds', 'tls-hostname', 'max-bandwidth',
|
|
'downtime-limit', 'x-checkpoint-delay', 'block-incremental',
|
|
'x-multifd-channels', 'x-multifd-page-count' ] }
|
|
|
|
##
|
|
# @MigrateSetParameters:
|
|
#
|
|
# @compress-level: compression level
|
|
#
|
|
# @compress-threads: compression thread count
|
|
#
|
|
# @decompress-threads: decompression thread count
|
|
#
|
|
# @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)
|
|
#
|
|
# @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)
|
|
#
|
|
# @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)
|
|
#
|
|
# @x-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 2.11)
|
|
#
|
|
# @x-multifd-page-count: Number of pages sent together to a thread
|
|
# The default value is 16 (since 2.11)
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
# TODO either fuse back into MigrationParameters, or make
|
|
# MigrationParameters members mandatory
|
|
{ 'struct': 'MigrateSetParameters',
|
|
'data': { '*compress-level': 'int',
|
|
'*compress-threads': 'int',
|
|
'*decompress-threads': 'int',
|
|
'*cpu-throttle-initial': 'int',
|
|
'*cpu-throttle-increment': 'int',
|
|
'*tls-creds': 'StrOrNull',
|
|
'*tls-hostname': 'StrOrNull',
|
|
'*max-bandwidth': 'int',
|
|
'*downtime-limit': 'int',
|
|
'*x-checkpoint-delay': 'int',
|
|
'*block-incremental': 'bool',
|
|
'*x-multifd-channels': 'int',
|
|
'*x-multifd-page-count': 'int' } }
|
|
|
|
##
|
|
# @migrate-set-parameters:
|
|
#
|
|
# Set various migration parameters.
|
|
#
|
|
# Since: 2.4
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-set-parameters" ,
|
|
# "arguments": { "compress-level": 1 } }
|
|
#
|
|
##
|
|
{ 'command': 'migrate-set-parameters', 'boxed': true,
|
|
'data': 'MigrateSetParameters' }
|
|
|
|
##
|
|
# @MigrationParameters:
|
|
#
|
|
# The optional members aren't actually optional.
|
|
#
|
|
# @compress-level: compression level
|
|
#
|
|
# @compress-threads: compression thread count
|
|
#
|
|
# @decompress-threads: decompression thread count
|
|
#
|
|
# @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)
|
|
#
|
|
# @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.
|
|
#
|
|
# @max-bandwidth: to set maximum speed for migration. maximum speed in
|
|
# bytes per second. (Since 2.8)
|
|
#
|
|
# @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)
|
|
#
|
|
# @x-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 2.11)
|
|
#
|
|
# @x-multifd-page-count: Number of pages sent together to a thread
|
|
# The default value is 16 (since 2.11)
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
{ 'struct': 'MigrationParameters',
|
|
'data': { '*compress-level': 'int',
|
|
'*compress-threads': 'int',
|
|
'*decompress-threads': 'int',
|
|
'*cpu-throttle-initial': 'int',
|
|
'*cpu-throttle-increment': 'int',
|
|
'*tls-creds': 'str',
|
|
'*tls-hostname': 'str',
|
|
'*max-bandwidth': 'int',
|
|
'*downtime-limit': 'int',
|
|
'*x-checkpoint-delay': 'int',
|
|
'*block-incremental': 'bool' ,
|
|
'*x-multifd-channels': 'int',
|
|
'*x-multifd-page-count': 'int' } }
|
|
|
|
##
|
|
# @query-migrate-parameters:
|
|
#
|
|
# Returns information about the current migration parameters
|
|
#
|
|
# Returns: @MigrationParameters
|
|
#
|
|
# Since: 2.4
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "query-migrate-parameters" }
|
|
# <- { "return": {
|
|
# "decompress-threads": 2,
|
|
# "cpu-throttle-increment": 10,
|
|
# "compress-threads": 8,
|
|
# "compress-level": 1,
|
|
# "cpu-throttle-initial": 20,
|
|
# "max-bandwidth": 33554432,
|
|
# "downtime-limit": 300
|
|
# }
|
|
# }
|
|
#
|
|
##
|
|
{ 'command': 'query-migrate-parameters',
|
|
'returns': 'MigrationParameters' }
|
|
|
|
##
|
|
# @client_migrate_info:
|
|
#
|
|
# Set migration information for remote display. This makes the server
|
|
# ask the client to automatically reconnect using the new parameters
|
|
# once migration finished successfully. Only implemented for SPICE.
|
|
#
|
|
# @protocol: must be "spice"
|
|
# @hostname: migration target hostname
|
|
# @port: spice tcp port for plaintext channels
|
|
# @tls-port: spice tcp port for tls-secured channels
|
|
# @cert-subject: server certificate subject
|
|
#
|
|
# Since: 0.14.0
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "client_migrate_info",
|
|
# "arguments": { "protocol": "spice",
|
|
# "hostname": "virt42.lab.kraxel.org",
|
|
# "port": 1234 } }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'client_migrate_info',
|
|
'data': { 'protocol': 'str', 'hostname': 'str', '*port': 'int',
|
|
'*tls-port': 'int', '*cert-subject': 'str' } }
|
|
|
|
##
|
|
# @migrate-start-postcopy:
|
|
#
|
|
# Followup to a migration command to switch the migration to postcopy mode.
|
|
# The postcopy-ram capability must be set 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 mode
|
|
#
|
|
# @unknown: unknown mode
|
|
#
|
|
# @primary: master side
|
|
#
|
|
# @secondary: slave side
|
|
#
|
|
# Since: 2.8
|
|
##
|
|
{ 'enum': 'COLOMode',
|
|
'data': [ 'unknown', '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' ] }
|
|
|
|
##
|
|
# @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.
|
|
#
|
|
# Since: 2.8
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "x-colo-lost-heartbeat" }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'x-colo-lost-heartbeat' }
|
|
|
|
##
|
|
# @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: 0.14.0
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate_cancel" }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'migrate_cancel' }
|
|
|
|
##
|
|
# @migrate_set_downtime:
|
|
#
|
|
# Set maximum tolerated downtime for migration.
|
|
#
|
|
# @value: maximum downtime in seconds
|
|
#
|
|
# Returns: nothing on success
|
|
#
|
|
# Notes: This command is deprecated in favor of 'migrate-set-parameters'
|
|
#
|
|
# Since: 0.14.0
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate_set_downtime", "arguments": { "value": 0.1 } }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'migrate_set_downtime', 'data': {'value': 'number'} }
|
|
|
|
##
|
|
# @migrate_set_speed:
|
|
#
|
|
# Set maximum speed for migration.
|
|
#
|
|
# @value: maximum speed in bytes per second.
|
|
#
|
|
# Returns: nothing on success
|
|
#
|
|
# Notes: This command is deprecated in favor of 'migrate-set-parameters'
|
|
#
|
|
# Since: 0.14.0
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate_set_speed", "arguments": { "value": 1024 } }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'migrate_set_speed', 'data': {'value': 'int'} }
|
|
|
|
##
|
|
# @migrate-set-cache-size:
|
|
#
|
|
# Set cache size to be used by XBZRLE migration
|
|
#
|
|
# @value: cache size in bytes
|
|
#
|
|
# The size will be rounded down to the nearest power of 2.
|
|
# The cache size can be modified before and during ongoing migration
|
|
#
|
|
# Returns: nothing on success
|
|
#
|
|
# Since: 1.2
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-set-cache-size",
|
|
# "arguments": { "value": 536870912 } }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'migrate-set-cache-size', 'data': {'value': 'int'} }
|
|
|
|
##
|
|
# @query-migrate-cache-size:
|
|
#
|
|
# Query migration XBZRLE cache size
|
|
#
|
|
# Returns: XBZRLE cache size in bytes
|
|
#
|
|
# Since: 1.2
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "query-migrate-cache-size" }
|
|
# <- { "return": 67108864 }
|
|
#
|
|
##
|
|
{ 'command': 'query-migrate-cache-size', 'returns': 'int' }
|
|
|
|
##
|
|
# @migrate:
|
|
#
|
|
# Migrates the current running guest to another Virtual Machine.
|
|
#
|
|
# @uri: the Uniform Resource Identifier of the destination VM
|
|
#
|
|
# @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
|
|
#
|
|
# Returns: nothing on success
|
|
#
|
|
# Since: 0.14.0
|
|
#
|
|
# 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
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'migrate',
|
|
'data': {'uri': 'str', '*blk': 'bool', '*inc': 'bool', '*detach': '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
|
|
#
|
|
# 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
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate-incoming",
|
|
# "arguments": { "uri": "tcp::4446" } }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'migrate-incoming', 'data': {'uri': 'str' } }
|
|
|
|
##
|
|
# @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.
|
|
#
|
|
# 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'} }
|
|
|
|
##
|
|
# @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' } }
|
|
|
|
##
|
|
# @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' } }
|
|
|
|
##
|
|
# @query-xen-replication-status:
|
|
#
|
|
# Query replication status while the vm is running.
|
|
#
|
|
# Returns: A @ReplicationResult object showing the status.
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "query-xen-replication-status" }
|
|
# <- { "return": { "error": false } }
|
|
#
|
|
# Since: 2.9
|
|
##
|
|
{ 'command': 'query-xen-replication-status',
|
|
'returns': 'ReplicationStatus' }
|
|
|
|
##
|
|
# @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' }
|