iotests: Test node/bitmap aliases during migration
Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20200820150725.68687-4-mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Tested-by: Eric Blake <eblake@redhat.com> [eblake: fold in python cleanups recommended by Vladimir] Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Max Reitz
Eric Blake
parent
4bf63c8035
commit
cb5c6cd2dc
593
tests/qemu-iotests/300
Executable file
593
tests/qemu-iotests/300
Executable file
@ -0,0 +1,593 @@
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#!/usr/bin/env python3
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#
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# Copyright (C) 2020 Red Hat, Inc.
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#
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# Tests for dirty bitmaps migration with node aliases
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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import os
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import random
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import re
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from typing import Dict, List, Optional, Union
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import iotests
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import qemu
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BlockBitmapMapping = List[Dict[str, Union[str, List[Dict[str, str]]]]]
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assert iotests.sock_dir is not None
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mig_sock = os.path.join(iotests.sock_dir, 'mig_sock')
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class TestDirtyBitmapMigration(iotests.QMPTestCase):
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src_node_name: str = ''
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dst_node_name: str = ''
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src_bmap_name: str = ''
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dst_bmap_name: str = ''
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def setUp(self) -> None:
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self.vm_a = iotests.VM(path_suffix='-a')
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self.vm_a.add_blockdev(f'node-name={self.src_node_name},'
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'driver=null-co')
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self.vm_a.launch()
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self.vm_b = iotests.VM(path_suffix='-b')
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self.vm_b.add_blockdev(f'node-name={self.dst_node_name},'
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'driver=null-co')
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self.vm_b.add_incoming(f'unix:{mig_sock}')
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self.vm_b.launch()
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result = self.vm_a.qmp('block-dirty-bitmap-add',
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node=self.src_node_name,
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name=self.src_bmap_name)
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self.assert_qmp(result, 'return', {})
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# Dirty some random megabytes
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for _ in range(9):
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mb_ofs = random.randrange(1024)
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self.vm_a.hmp_qemu_io(self.src_node_name, f'discard {mb_ofs}M 1M')
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result = self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256',
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node=self.src_node_name,
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name=self.src_bmap_name)
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self.bitmap_hash_reference = result['return']['sha256']
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caps = [{'capability': name, 'state': True}
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for name in ('dirty-bitmaps', 'events')]
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for vm in (self.vm_a, self.vm_b):
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result = vm.qmp('migrate-set-capabilities', capabilities=caps)
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self.assert_qmp(result, 'return', {})
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def tearDown(self) -> None:
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self.vm_a.shutdown()
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self.vm_b.shutdown()
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try:
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os.remove(mig_sock)
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except OSError:
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pass
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def check_bitmap(self, bitmap_name_valid: bool) -> None:
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result = self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256',
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node=self.dst_node_name,
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name=self.dst_bmap_name)
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if bitmap_name_valid:
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self.assert_qmp(result, 'return/sha256',
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self.bitmap_hash_reference)
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else:
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self.assert_qmp(result, 'error/desc',
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f"Dirty bitmap '{self.dst_bmap_name}' not found")
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def migrate(self, bitmap_name_valid: bool = True,
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migration_success: bool = True) -> None:
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result = self.vm_a.qmp('migrate', uri=f'unix:{mig_sock}')
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self.assert_qmp(result, 'return', {})
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with iotests.Timeout(5, 'Timeout waiting for migration to complete'):
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self.assertEqual(self.vm_a.wait_migration('postmigrate'),
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migration_success)
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self.assertEqual(self.vm_b.wait_migration('running'),
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migration_success)
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if migration_success:
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self.check_bitmap(bitmap_name_valid)
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def verify_dest_error(self, msg: Optional[str]) -> None:
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"""
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Check whether the given error message is present in vm_b's log.
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(vm_b is shut down to do so.)
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If @msg is None, check that there has not been any error.
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"""
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self.vm_b.shutdown()
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if msg is None:
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self.assertNotIn('qemu-system-', self.vm_b.get_log())
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else:
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self.assertIn(msg, self.vm_b.get_log())
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@staticmethod
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def mapping(node_name: str, node_alias: str,
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bitmap_name: str, bitmap_alias: str) -> BlockBitmapMapping:
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return [{
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'node-name': node_name,
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'alias': node_alias,
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'bitmaps': [{
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'name': bitmap_name,
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'alias': bitmap_alias
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}]
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}]
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def set_mapping(self, vm: iotests.VM, mapping: BlockBitmapMapping,
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error: Optional[str] = None) -> None:
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"""
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Invoke migrate-set-parameters on @vm to set the given @mapping.
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Check for success if @error is None, or verify the error message
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if it is not.
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On success, verify that "info migrate_parameters" on HMP returns
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our mapping. (Just to check its formatting code.)
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"""
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result = vm.qmp('migrate-set-parameters',
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block_bitmap_mapping=mapping)
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if error is None:
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self.assert_qmp(result, 'return', {})
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result = vm.qmp('human-monitor-command',
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command_line='info migrate_parameters')
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m = re.search(r'^block-bitmap-mapping:\r?(\n .*)*\n',
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result['return'], flags=re.MULTILINE)
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hmp_mapping = m.group(0).replace('\r', '') if m else None
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self.assertEqual(hmp_mapping, self.to_hmp_mapping(mapping))
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else:
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self.assert_qmp(result, 'error/desc', error)
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@staticmethod
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def to_hmp_mapping(mapping: BlockBitmapMapping) -> str:
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result = 'block-bitmap-mapping:\n'
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for node in mapping:
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result += f" '{node['node-name']}' -> '{node['alias']}'\n"
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assert isinstance(node['bitmaps'], list)
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for bitmap in node['bitmaps']:
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result += f" '{bitmap['name']}' -> '{bitmap['alias']}'\n"
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return result
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class TestAliasMigration(TestDirtyBitmapMigration):
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src_node_name = 'node0'
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dst_node_name = 'node0'
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src_bmap_name = 'bmap0'
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dst_bmap_name = 'bmap0'
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def test_migration_without_alias(self) -> None:
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self.migrate(self.src_node_name == self.dst_node_name and
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self.src_bmap_name == self.dst_bmap_name)
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# Check for error message on the destination
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if self.src_node_name != self.dst_node_name:
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self.verify_dest_error(f"Cannot find "
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f"device={self.src_node_name} nor "
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f"node_name={self.src_node_name}")
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else:
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self.verify_dest_error(None)
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def test_alias_on_src_migration(self) -> None:
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mapping = self.mapping(self.src_node_name, self.dst_node_name,
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self.src_bmap_name, self.dst_bmap_name)
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self.set_mapping(self.vm_a, mapping)
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self.migrate()
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self.verify_dest_error(None)
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def test_alias_on_dst_migration(self) -> None:
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mapping = self.mapping(self.dst_node_name, self.src_node_name,
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self.dst_bmap_name, self.src_bmap_name)
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self.set_mapping(self.vm_b, mapping)
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self.migrate()
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self.verify_dest_error(None)
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def test_alias_on_both_migration(self) -> None:
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src_map = self.mapping(self.src_node_name, 'node-alias',
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self.src_bmap_name, 'bmap-alias')
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dst_map = self.mapping(self.dst_node_name, 'node-alias',
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self.dst_bmap_name, 'bmap-alias')
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self.set_mapping(self.vm_a, src_map)
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self.set_mapping(self.vm_b, dst_map)
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self.migrate()
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self.verify_dest_error(None)
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class TestNodeAliasMigration(TestAliasMigration):
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src_node_name = 'node-src'
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dst_node_name = 'node-dst'
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class TestBitmapAliasMigration(TestAliasMigration):
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src_bmap_name = 'bmap-src'
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dst_bmap_name = 'bmap-dst'
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class TestFullAliasMigration(TestAliasMigration):
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src_node_name = 'node-src'
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dst_node_name = 'node-dst'
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src_bmap_name = 'bmap-src'
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dst_bmap_name = 'bmap-dst'
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class TestLongBitmapNames(TestAliasMigration):
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# Giving long bitmap names is OK, as long as there is a short alias for
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# migration
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src_bmap_name = 'a' * 512
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dst_bmap_name = 'b' * 512
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# Skip all tests that do not use the intermediate alias
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def test_migration_without_alias(self) -> None:
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pass
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def test_alias_on_src_migration(self) -> None:
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pass
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def test_alias_on_dst_migration(self) -> None:
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pass
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class TestBlockBitmapMappingErrors(TestDirtyBitmapMigration):
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src_node_name = 'node0'
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dst_node_name = 'node0'
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src_bmap_name = 'bmap0'
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dst_bmap_name = 'bmap0'
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"""
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Note that mapping nodes or bitmaps that do not exist is not an error.
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"""
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def test_non_injective_node_mapping(self) -> None:
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mapping: BlockBitmapMapping = [
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{
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'node-name': 'node0',
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'alias': 'common-alias',
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'bitmaps': [{
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'name': 'bmap0',
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'alias': 'bmap-alias0'
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}]
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},
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{
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'node-name': 'node1',
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'alias': 'common-alias',
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'bitmaps': [{
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'name': 'bmap1',
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'alias': 'bmap-alias1'
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}]
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}
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]
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self.set_mapping(self.vm_a, mapping,
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"Invalid mapping given for block-bitmap-mapping: "
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"The node alias 'common-alias' is used twice")
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def test_non_injective_bitmap_mapping(self) -> None:
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mapping: BlockBitmapMapping = [{
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'node-name': 'node0',
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'alias': 'node-alias0',
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'bitmaps': [
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{
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'name': 'bmap0',
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'alias': 'common-alias'
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},
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{
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'name': 'bmap1',
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'alias': 'common-alias'
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}
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]
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}]
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self.set_mapping(self.vm_a, mapping,
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"Invalid mapping given for block-bitmap-mapping: "
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"The bitmap alias 'node-alias0'/'common-alias' is "
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"used twice")
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def test_ambiguous_node_mapping(self) -> None:
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mapping: BlockBitmapMapping = [
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{
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'node-name': 'node0',
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'alias': 'node-alias0',
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'bitmaps': [{
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'name': 'bmap0',
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'alias': 'bmap-alias0'
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}]
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},
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{
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'node-name': 'node0',
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'alias': 'node-alias1',
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'bitmaps': [{
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'name': 'bmap0',
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'alias': 'bmap-alias0'
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}]
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}
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]
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self.set_mapping(self.vm_a, mapping,
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"Invalid mapping given for block-bitmap-mapping: "
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"The node name 'node0' is mapped twice")
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def test_ambiguous_bitmap_mapping(self) -> None:
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mapping: BlockBitmapMapping = [{
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'node-name': 'node0',
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'alias': 'node-alias0',
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'bitmaps': [
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{
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'name': 'bmap0',
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'alias': 'bmap-alias0'
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},
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{
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'name': 'bmap0',
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'alias': 'bmap-alias1'
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}
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]
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}]
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self.set_mapping(self.vm_a, mapping,
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"Invalid mapping given for block-bitmap-mapping: "
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"The bitmap 'node0'/'bmap0' is mapped twice")
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def test_migratee_node_is_not_mapped_on_src(self) -> None:
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self.set_mapping(self.vm_a, [])
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# Should just ignore all bitmaps on unmapped nodes
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self.migrate(False)
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self.verify_dest_error(None)
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def test_migratee_node_is_not_mapped_on_dst(self) -> None:
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self.set_mapping(self.vm_b, [])
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self.migrate(False)
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self.verify_dest_error(f"Unknown node alias '{self.src_node_name}'")
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def test_migratee_bitmap_is_not_mapped_on_src(self) -> None:
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mapping: BlockBitmapMapping = [{
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'node-name': self.src_node_name,
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'alias': self.dst_node_name,
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'bitmaps': []
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}]
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self.set_mapping(self.vm_a, mapping)
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# Should just ignore all unmapped bitmaps
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self.migrate(False)
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self.verify_dest_error(None)
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def test_migratee_bitmap_is_not_mapped_on_dst(self) -> None:
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mapping: BlockBitmapMapping = [{
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'node-name': self.dst_node_name,
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'alias': self.src_node_name,
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'bitmaps': []
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}]
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self.set_mapping(self.vm_b, mapping)
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self.migrate(False)
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self.verify_dest_error(f"Unknown bitmap alias "
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f"'{self.src_bmap_name}' "
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f"on node '{self.dst_node_name}' "
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f"(alias '{self.src_node_name}')")
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def test_unused_mapping_on_dst(self) -> None:
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# Let the source not send any bitmaps
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self.set_mapping(self.vm_a, [])
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# Establish some mapping on the destination
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self.set_mapping(self.vm_b, [])
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# The fact that there is a mapping on B without any bitmaps
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# being received should be fine, not fatal
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self.migrate(False)
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self.verify_dest_error(None)
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def test_non_wellformed_node_alias(self) -> None:
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alias = '123-foo'
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mapping: BlockBitmapMapping = [{
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'node-name': self.src_node_name,
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'alias': alias,
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'bitmaps': []
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}]
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self.set_mapping(self.vm_a, mapping,
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f"Invalid mapping given for block-bitmap-mapping: "
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f"The node alias '{alias}' is not well-formed")
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def test_node_alias_too_long(self) -> None:
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alias = 'a' * 256
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mapping: BlockBitmapMapping = [{
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'node-name': self.src_node_name,
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'alias': alias,
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'bitmaps': []
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}]
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self.set_mapping(self.vm_a, mapping,
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f"Invalid mapping given for block-bitmap-mapping: "
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f"The node alias '{alias}' is longer than 255 bytes")
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def test_bitmap_alias_too_long(self) -> None:
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alias = 'a' * 256
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mapping = self.mapping(self.src_node_name, self.dst_node_name,
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self.src_bmap_name, alias)
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self.set_mapping(self.vm_a, mapping,
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f"Invalid mapping given for block-bitmap-mapping: "
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f"The bitmap alias '{alias}' is longer than 255 "
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f"bytes")
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def test_bitmap_name_too_long(self) -> None:
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name = 'a' * 256
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result = self.vm_a.qmp('block-dirty-bitmap-add',
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node=self.src_node_name,
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name=name)
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self.assert_qmp(result, 'return', {})
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self.migrate(False, False)
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# Check for the error in the source's log
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self.vm_a.shutdown()
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self.assertIn(f"Cannot migrate bitmap '{name}' on node "
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f"'{self.src_node_name}': Name is longer than 255 bytes",
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self.vm_a.get_log())
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# Expect abnormal shutdown of the destination VM because of
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# the failed migration
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try:
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self.vm_b.shutdown()
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except qemu.machine.AbnormalShutdown:
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pass
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def test_aliased_bitmap_name_too_long(self) -> None:
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# Longer than the maximum for bitmap names
|
||||
self.dst_bmap_name = 'a' * 1024
|
||||
|
||||
mapping = self.mapping(self.dst_node_name, self.src_node_name,
|
||||
self.dst_bmap_name, self.src_bmap_name)
|
||||
|
||||
# We would have to create this bitmap during migration, and
|
||||
# that would fail, because the name is too long. Better to
|
||||
# catch it early.
|
||||
self.set_mapping(self.vm_b, mapping,
|
||||
f"Invalid mapping given for block-bitmap-mapping: "
|
||||
f"The bitmap name '{self.dst_bmap_name}' is longer "
|
||||
f"than 1023 bytes")
|
||||
|
||||
def test_node_name_too_long(self) -> None:
|
||||
# Longer than the maximum for node names
|
||||
self.dst_node_name = 'a' * 32
|
||||
|
||||
mapping = self.mapping(self.dst_node_name, self.src_node_name,
|
||||
self.dst_bmap_name, self.src_bmap_name)
|
||||
|
||||
# During migration, this would appear simply as a node that
|
||||
# cannot be found. Still better to catch impossible node
|
||||
# names early (similar to test_non_wellformed_node_alias).
|
||||
self.set_mapping(self.vm_b, mapping,
|
||||
f"Invalid mapping given for block-bitmap-mapping: "
|
||||
f"The node name '{self.dst_node_name}' is longer "
|
||||
f"than 31 bytes")
|
||||
|
||||
|
||||
class TestCrossAliasMigration(TestDirtyBitmapMigration):
|
||||
"""
|
||||
Swap aliases, both to see that qemu does not get confused, and
|
||||
that we can migrate multiple things at once.
|
||||
|
||||
So we migrate this:
|
||||
node-a.bmap-a -> node-b.bmap-b
|
||||
node-a.bmap-b -> node-b.bmap-a
|
||||
node-b.bmap-a -> node-a.bmap-b
|
||||
node-b.bmap-b -> node-a.bmap-a
|
||||
"""
|
||||
|
||||
src_node_name = 'node-a'
|
||||
dst_node_name = 'node-b'
|
||||
src_bmap_name = 'bmap-a'
|
||||
dst_bmap_name = 'bmap-b'
|
||||
|
||||
def setUp(self) -> None:
|
||||
TestDirtyBitmapMigration.setUp(self)
|
||||
|
||||
# Now create another block device and let both have two bitmaps each
|
||||
result = self.vm_a.qmp('blockdev-add',
|
||||
node_name='node-b', driver='null-co')
|
||||
self.assert_qmp(result, 'return', {})
|
||||
|
||||
result = self.vm_b.qmp('blockdev-add',
|
||||
node_name='node-a', driver='null-co')
|
||||
self.assert_qmp(result, 'return', {})
|
||||
|
||||
bmaps_to_add = (('node-a', 'bmap-b'),
|
||||
('node-b', 'bmap-a'),
|
||||
('node-b', 'bmap-b'))
|
||||
|
||||
for (node, bmap) in bmaps_to_add:
|
||||
result = self.vm_a.qmp('block-dirty-bitmap-add',
|
||||
node=node, name=bmap)
|
||||
self.assert_qmp(result, 'return', {})
|
||||
|
||||
@staticmethod
|
||||
def cross_mapping() -> BlockBitmapMapping:
|
||||
return [
|
||||
{
|
||||
'node-name': 'node-a',
|
||||
'alias': 'node-b',
|
||||
'bitmaps': [
|
||||
{
|
||||
'name': 'bmap-a',
|
||||
'alias': 'bmap-b'
|
||||
},
|
||||
{
|
||||
'name': 'bmap-b',
|
||||
'alias': 'bmap-a'
|
||||
}
|
||||
]
|
||||
},
|
||||
{
|
||||
'node-name': 'node-b',
|
||||
'alias': 'node-a',
|
||||
'bitmaps': [
|
||||
{
|
||||
'name': 'bmap-b',
|
||||
'alias': 'bmap-a'
|
||||
},
|
||||
{
|
||||
'name': 'bmap-a',
|
||||
'alias': 'bmap-b'
|
||||
}
|
||||
]
|
||||
}
|
||||
]
|
||||
|
||||
def verify_dest_has_all_bitmaps(self) -> None:
|
||||
bitmaps = self.vm_b.query_bitmaps()
|
||||
|
||||
# Extract and sort bitmap names
|
||||
for node in bitmaps:
|
||||
bitmaps[node] = sorted((bmap['name'] for bmap in bitmaps[node]))
|
||||
|
||||
self.assertEqual(bitmaps,
|
||||
{'node-a': ['bmap-a', 'bmap-b'],
|
||||
'node-b': ['bmap-a', 'bmap-b']})
|
||||
|
||||
def test_alias_on_src(self) -> None:
|
||||
self.set_mapping(self.vm_a, self.cross_mapping())
|
||||
|
||||
# Checks that node-a.bmap-a was migrated to node-b.bmap-b, and
|
||||
# that is enough
|
||||
self.migrate()
|
||||
self.verify_dest_has_all_bitmaps()
|
||||
self.verify_dest_error(None)
|
||||
|
||||
def test_alias_on_dst(self) -> None:
|
||||
self.set_mapping(self.vm_b, self.cross_mapping())
|
||||
|
||||
# Checks that node-a.bmap-a was migrated to node-b.bmap-b, and
|
||||
# that is enough
|
||||
self.migrate()
|
||||
self.verify_dest_has_all_bitmaps()
|
||||
self.verify_dest_error(None)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
iotests.main(supported_protocols=['file'])
|
||||
5
tests/qemu-iotests/300.out
Normal file
5
tests/qemu-iotests/300.out
Normal file
@ -0,0 +1,5 @@
|
||||
.....................................
|
||||
----------------------------------------------------------------------
|
||||
Ran 37 tests
|
||||
|
||||
OK
|
||||
@ -307,6 +307,7 @@
|
||||
296 rw
|
||||
297 meta
|
||||
299 auto quick
|
||||
300 migration
|
||||
301 backing quick
|
||||
302 quick
|
||||
303 rw quick
|
||||
|
||||
Loading…
Reference in New Issue
Block a user