2133 lines
71 KiB
Python
2133 lines
71 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 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 (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
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# guest (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 (since 2.1)
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#
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# @postcopy-requests: The number of page requests received from the destination
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# (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 synchronization could
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# not avoid copying dirty pages. This is between
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# 0 and @dirty-sync-count * @multifd-channels.
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# (since 7.1)
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# Since: 0.14
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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', 'skipped': 'int', '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 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 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 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 this
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# state unless colo capability is enabled for migration. (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 enabled
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# (since 2.11)
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#
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# @wait-unplug: wait for device unplug request by guest OS to be completed.
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# (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 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
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# has been initiated
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#
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# @ram: @MigrationStats containing detailed migration
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# status, only returned if status is 'active' or
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# 'completed'(since 1.2)
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#
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# @disk: @MigrationStats containing detailed disk migration
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# status, only returned if status is 'active' and it is a block
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# 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
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# time. (since 1.2)
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#
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# @downtime: only present when migration finishes correctly
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# total downtime in milliseconds for the guest.
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# (since 1.3)
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#
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# @expected-downtime: only present while migration is active
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# expected downtime in milliseconds for the guest in last walk
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# of the dirty 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 designed
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# to provide an accounting of any activities (such as RDMA pinning) which
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# may be expensive, but do not actually occur during the iterative
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# 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 auto-converge
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# has started throttling guest cpus. (Since 2.7)
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#
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# @error-desc: the human readable error description string, when
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# @status is 'failed'. Clients should not attempt to parse the
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# error strings. (Since 2.7)
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#
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# @postcopy-blocktime: total time when all vCPU were blocked during postcopy
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# live migration. This is only present when the postcopy-blocktime
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# 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. This is
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# only present when the postcopy-blocktime migration capability
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# is enabled. (Since 3.0)
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#
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# @compression: migration compression statistics, only returned if compression
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# feature is on and status is 'active' or 'completed' (Since 3.1)
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#
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# @socket-address: Only used for tcp, to know what the real port is (Since 4.0)
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#
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# @vfio: @VfioStats containing detailed VFIO devices migration statistics,
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# only returned if VFIO device is present, migration is supported by all
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# VFIO devices and status is 'active' or 'completed' (since 5.2)
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#
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# @blocked-reasons: A list of reasons an outgoing migration is blocked.
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# Present and non-empty when migration is blocked.
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# (since 6.0)
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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': 'MigrationStats',
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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': 'CompressionStats',
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'*socket-address': ['SocketAddress'] } }
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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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# Example:
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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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##
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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 Encoding).
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# This feature allows us to minimize migration traffic for certain work
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# loads, by sending compressed difference of the pages
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#
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# @rdma-pin-all: Controls whether or not the entire VM memory footprint is
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# mlock()'d on demand or all at once. Refer to docs/rdma.txt for usage.
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# Disabled by default. (since 2.0)
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#
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# @zero-blocks: During storage migration encode blocks of zeroes efficiently. This
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# essentially saves 1MB of zeroes per block on the wire. Enabling requires
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# source and target VM to support this feature. To enable it is sufficient
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# to enable the capability on the source VM. The feature is disabled by
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# default. (since 1.6)
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#
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# @compress: Use multiple compression threads to accelerate live migration.
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# This feature can help to reduce the migration traffic, by sending
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# compressed pages. Please note that if compress and xbzrle are both
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# on, compress only takes effect in the ram bulk stage, after that,
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# it will be disabled and only xbzrle takes effect, this can help to
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# minimize migration traffic. The feature is disabled by default.
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# (since 2.4 )
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#
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# @events: generate events for each migration state change
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|
# (since 2.4 )
|
|
#
|
|
# @auto-converge: If enabled, QEMU will automatically throttle down 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 RAM has
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# been migrated, pulling the remaining pages along as needed. The
|
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# capacity must have the same setting on both source and target
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# or migration will not even start. NOTE: If the migration fails during
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# 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 VM on the
|
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# primary side will be migrated continuously to the VM on secondary
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# side, this process is called COarse-Grain LOck Stepping (COLO) for
|
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# 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)
|
|
#
|
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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)
|
|
#
|
|
# @return-path: If enabled, migration will use the return path even
|
|
# for precopy. (since 2.10)
|
|
#
|
|
# @pause-before-switchover: Pause outgoing migration before serialising device
|
|
# state and before disabling block IO (since 2.11)
|
|
#
|
|
# @multifd: Use more than one fd for migration (since 4.0)
|
|
#
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|
# @dirty-bitmaps: If enabled, QEMU will migrate named dirty bitmaps.
|
|
# (since 2.12)
|
|
#
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|
# @postcopy-blocktime: Calculate downtime for postcopy live migration
|
|
# (since 3.0)
|
|
#
|
|
# @late-block-activate: If enabled, the destination will not activate block
|
|
# devices (and thus take locks) immediately at the end of migration.
|
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# (since 3.0)
|
|
#
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|
# @x-ignore-shared: If enabled, QEMU will not migrate shared memory (since 4.0)
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|
#
|
|
# @validate-uuid: Send the UUID of the source to allow the destination
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|
# to ensure it is the same. (since 4.2)
|
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#
|
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# @background-snapshot: If enabled, the migration stream will be a snapshot
|
|
# of the VM exactly at the point when the migration
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# procedure starts. The VM RAM is saved with running VM.
|
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# (since 6.0)
|
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#
|
|
# @zero-copy-send: Controls behavior on sending memory pages on migration.
|
|
# When true, enables a zero-copy mechanism for sending
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# memory pages, if host supports it.
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# Requires that QEMU be permitted to use locked memory
|
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# 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
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# will be handled faster. This is a performance feature and
|
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# should not affect the correctness of postcopy migration.
|
|
# (since 7.1)
|
|
#
|
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# Features:
|
|
# @unstable: Members @x-colo and @x-ignore-shared are experimental.
|
|
#
|
|
# Since: 1.2
|
|
##
|
|
{ 'enum': 'MigrationCapability',
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|
'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
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|
'compress', 'events', 'postcopy-ram',
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|
{ 'name': 'x-colo', 'features': [ 'unstable' ] },
|
|
'release-ram',
|
|
'block', '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'] }
|
|
|
|
##
|
|
# @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']}
|
|
|
|
##
|
|
# @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' } ] }
|
|
|
|
##
|
|
# @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)
|
|
#
|
|
# @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)
|
|
#
|
|
# Features:
|
|
# @unstable: Member @x-checkpoint-delay is experimental.
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
{ 'enum': 'MigrationParameter',
|
|
'data': ['announce-initial', 'announce-max',
|
|
'announce-rounds', 'announce-step',
|
|
'compress-level', 'compress-threads', 'decompress-threads',
|
|
'compress-wait-thread', 'throttle-trigger-threshold',
|
|
'cpu-throttle-initial', 'cpu-throttle-increment',
|
|
'cpu-throttle-tailslow',
|
|
'tls-creds', 'tls-hostname', 'tls-authz', 'max-bandwidth',
|
|
'downtime-limit',
|
|
{ 'name': 'x-checkpoint-delay', 'features': [ 'unstable' ] },
|
|
'block-incremental',
|
|
'multifd-channels',
|
|
'xbzrle-cache-size', 'max-postcopy-bandwidth',
|
|
'max-cpu-throttle', 'multifd-compression',
|
|
'multifd-zlib-level' ,'multifd-zstd-level',
|
|
'block-bitmap-mapping' ] }
|
|
|
|
##
|
|
# @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)
|
|
#
|
|
# @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)
|
|
#
|
|
# Features:
|
|
# @unstable: Member @x-checkpoint-delay is experimental.
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
# TODO either fuse back into MigrationParameters, or make
|
|
# MigrationParameters members mandatory
|
|
{ 'struct': 'MigrateSetParameters',
|
|
'data': { '*announce-initial': 'size',
|
|
'*announce-max': 'size',
|
|
'*announce-rounds': 'size',
|
|
'*announce-step': 'size',
|
|
'*compress-level': 'uint8',
|
|
'*compress-threads': 'uint8',
|
|
'*compress-wait-thread': 'bool',
|
|
'*decompress-threads': 'uint8',
|
|
'*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',
|
|
'*downtime-limit': 'uint64',
|
|
'*x-checkpoint-delay': { 'type': 'uint32',
|
|
'features': [ 'unstable' ] },
|
|
'*block-incremental': 'bool',
|
|
'*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' ] } }
|
|
|
|
##
|
|
# @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.
|
|
#
|
|
# @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)
|
|
#
|
|
# @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)
|
|
#
|
|
# Features:
|
|
# @unstable: Member @x-checkpoint-delay is experimental.
|
|
#
|
|
# Since: 2.4
|
|
##
|
|
{ 'struct': 'MigrationParameters',
|
|
'data': { '*announce-initial': 'size',
|
|
'*announce-max': 'size',
|
|
'*announce-rounds': 'size',
|
|
'*announce-step': 'size',
|
|
'*compress-level': 'uint8',
|
|
'*compress-threads': 'uint8',
|
|
'*compress-wait-thread': 'bool',
|
|
'*decompress-threads': 'uint8',
|
|
'*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',
|
|
'*downtime-limit': 'uint64',
|
|
'*x-checkpoint-delay': { 'type': 'uint32',
|
|
'features': [ 'unstable' ] },
|
|
'*block-incremental': 'bool',
|
|
'*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' ] } }
|
|
|
|
##
|
|
# @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
|
|
#
|
|
# 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 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' ] }
|
|
|
|
##
|
|
# @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'} }
|
|
|
|
##
|
|
# @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
|
|
#
|
|
# @resume: resume one paused migration, default "off". (since 3.0)
|
|
#
|
|
# 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
|
|
#
|
|
# Example:
|
|
#
|
|
# -> { "execute": "migrate", "arguments": { "uri": "tcp:0:4446" } }
|
|
# <- { "return": {} }
|
|
#
|
|
##
|
|
{ 'command': 'migrate',
|
|
'data': {'uri': 'str', '*blk': 'bool', '*inc': 'bool',
|
|
'*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
|
|
#
|
|
# 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.
|
|
#
|
|
# @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' } }
|
|
|
|
##
|
|
# @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' }
|
|
|
|
##
|
|
# @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:
|
|
#
|
|
# An enumeration of dirtyrate status.
|
|
#
|
|
# @unstarted: the dirtyrate thread has not been started.
|
|
#
|
|
# @measuring: the dirtyrate thread is measuring.
|
|
#
|
|
# @measured: the dirtyrate thread has measured and results are available.
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'enum': 'DirtyRateStatus',
|
|
'data': [ 'unstarted', 'measuring', 'measured'] }
|
|
|
|
##
|
|
# @DirtyRateMeasureMode:
|
|
#
|
|
# An enumeration of mode of measuring dirtyrate.
|
|
#
|
|
# @page-sampling: calculate dirtyrate by sampling pages.
|
|
#
|
|
# @dirty-ring: calculate dirtyrate by dirty ring.
|
|
#
|
|
# @dirty-bitmap: calculate dirtyrate by dirty bitmap.
|
|
#
|
|
# Since: 6.2
|
|
##
|
|
{ 'enum': 'DirtyRateMeasureMode',
|
|
'data': ['page-sampling', 'dirty-ring', 'dirty-bitmap'] }
|
|
|
|
##
|
|
# @DirtyRateInfo:
|
|
#
|
|
# Information about current dirty page rate of vm.
|
|
#
|
|
# @dirty-rate: an estimate of the dirty page rate of the VM in units of
|
|
# MB/s, present only when estimating the rate has completed.
|
|
#
|
|
# @status: status containing dirtyrate query status includes
|
|
# 'unstarted' or 'measuring' or 'measured'
|
|
#
|
|
# @start-time: start time in units of second for calculation
|
|
#
|
|
# @calc-time: time in units of second for sample dirty pages
|
|
#
|
|
# @sample-pages: page count per GB for sample dirty pages
|
|
# the default value is 512 (since 6.1)
|
|
#
|
|
# @mode: mode containing method of calculate dirtyrate includes
|
|
# 'page-sampling' and 'dirty-ring' (Since 6.2)
|
|
#
|
|
# @vcpu-dirty-rate: dirtyrate for each vcpu if dirty-ring
|
|
# mode specified (Since 6.2)
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'struct': 'DirtyRateInfo',
|
|
'data': {'*dirty-rate': 'int64',
|
|
'status': 'DirtyRateStatus',
|
|
'start-time': 'int64',
|
|
'calc-time': 'int64',
|
|
'sample-pages': 'uint64',
|
|
'mode': 'DirtyRateMeasureMode',
|
|
'*vcpu-dirty-rate': [ 'DirtyRateVcpu' ] } }
|
|
|
|
##
|
|
# @calc-dirty-rate:
|
|
#
|
|
# start calculating dirty page rate for vm
|
|
#
|
|
# @calc-time: time in units of second for sample dirty pages
|
|
#
|
|
# @sample-pages: page count per GB for sample dirty pages
|
|
# the default value is 512 (since 6.1)
|
|
#
|
|
# @mode: mechanism of calculating dirtyrate includes
|
|
# 'page-sampling' and 'dirty-ring' (Since 6.1)
|
|
#
|
|
# Since: 5.2
|
|
#
|
|
# Example:
|
|
#
|
|
# {"execute": "calc-dirty-rate", "arguments": {"calc-time": 1,
|
|
# 'sample-pages': 512} }
|
|
#
|
|
##
|
|
{ 'command': 'calc-dirty-rate', 'data': {'calc-time': 'int64',
|
|
'*sample-pages': 'int',
|
|
'*mode': 'DirtyRateMeasureMode'} }
|
|
|
|
##
|
|
# @query-dirty-rate:
|
|
#
|
|
# query dirty page rate in units of MB/s for vm
|
|
#
|
|
# Since: 5.2
|
|
##
|
|
{ 'command': 'query-dirty-rate', '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 } }
|
|
#
|
|
##
|
|
{ '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 } }
|
|
#
|
|
##
|
|
{ '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"}
|
|
#
|
|
##
|
|
{ 'command': 'query-vcpu-dirty-limit',
|
|
'returns': [ 'DirtyLimitInfo' ] }
|
|
|
|
##
|
|
# @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",
|
|
# "data": {"status": "created", "id": "snapsave0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "running", "id": "snapsave0"}}
|
|
# <- {"event": "STOP"}
|
|
# <- {"event": "RESUME"}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "waiting", "id": "snapsave0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "pending", "id": "snapsave0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "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",
|
|
# "data": {"status": "created", "id": "snapload0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "running", "id": "snapload0"}}
|
|
# <- {"event": "STOP"}
|
|
# <- {"event": "RESUME"}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "waiting", "id": "snapload0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "pending", "id": "snapload0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "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",
|
|
# "data": {"status": "created", "id": "snapdelete0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "running", "id": "snapdelete0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "waiting", "id": "snapdelete0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "data": {"status": "pending", "id": "snapdelete0"}}
|
|
# <- {"event": "JOB_STATUS_CHANGE",
|
|
# "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'] } }
|