Add VM snapshot send (initial)
This commit is contained in:
parent
0d533f3658
commit
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@ -3572,6 +3572,131 @@ class API_VM_Snapshot_Import(Resource):
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api.add_resource(API_VM_Snapshot_Import, "/vm/<vm>/snapshot/import")
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# /vm/<vm>/snapshot/send
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class API_VM_Snapshot_Send(Resource):
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@RequestParser(
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[
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{
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"name": "snapshot_name",
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"required": True,
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"helptext": "A snapshot name must be specified",
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},
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{
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"name": "destination_api_uri",
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"required": True,
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"helptext": "A destination API URI must be specified",
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},
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{
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"name": "destination_api_key",
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"required": True,
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"helptext": "A destination API key must be specified",
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},
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{
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"name": "destination_api_verify_ssl",
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"required": False,
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},
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{
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"name": "incremental_parent",
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"required": False,
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},
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{
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"name": "destination_storage_pool",
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"required": False,
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},
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]
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)
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@Authenticator
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def post(self, vm, reqargs):
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"""
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Send a snapshot of a VM's disks and configuration to another PVC cluster
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---
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tags:
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- vm
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parameters:
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- in: query
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name: snapshot_name
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type: string
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required: true
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description: The name of the snapshot to export (must exist)
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- in: query
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name: destination_api_uri
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type: string
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required: true
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description: The base API URI of the destination PVC cluster (with prefix if applicable)
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- in: query
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name: destination_api_key
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type: string
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required: true
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description: The API authentication key of the destination PVC cluster
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- in: query
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name: destination_api_verify_ssl
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type: boolean
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required: false
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default: true
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description: Whether or not to validate SSL certificates for an SSL-enabled destination API
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- in: query
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name: incremental_parent
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type: string
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required: false
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description: A snapshot name to generate an incremental diff from; incremental send only if unset
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- in: query
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name: destination_storage_pool
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type: string
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required: false
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default: source storage pool name
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description: The remote cluster storage pool to create RBD volumes in, if different from the source storage pool
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responses:
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202:
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description: Accepted
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schema:
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type: string
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description: The Celery job ID of the task
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400:
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description: Execution error
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schema:
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type: object
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id: Message
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404:
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description: Not found
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schema:
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type: object
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id: Message
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"""
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snapshot_name = reqargs.get("snapshot_name", None)
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destination_api_uri = reqargs.get("destination_api_uri", None)
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destination_api_key = reqargs.get("destination_api_key", None)
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destination_api_verify_ssl = bool(
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strtobool(reqargs.get("destination_api_verify_ssl", "true"))
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)
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incremental_parent = reqargs.get("incremental_parent", None)
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destination_storage_pool = reqargs.get("destination_storage_pool", None)
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task = run_celery_task(
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"vm.send_snapshot",
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domain=vm,
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snapshot_name=snapshot_name,
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destination_api_uri=destination_api_uri,
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destination_api_key=destination_api_key,
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destination_api_verify_ssl=destination_api_verify_ssl,
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incremental_parent=incremental_parent,
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destination_storage_pool=destination_storage_pool,
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run_on="primary",
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)
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return (
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{
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"task_id": task.id,
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"task_name": "vm.send_snapshot",
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"run_on": f"{get_primary_node()} (primary)",
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},
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202,
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{"Location": Api.url_for(api, API_Tasks_Element, task_id=task.id)},
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)
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api.add_resource(API_VM_Snapshot_Send, "/vm/<vm>/snapshot/send")
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# /vm/<vm>/snapshot/receive/block
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class API_VM_Snapshot_Receive_Block(Resource):
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@RequestParser(
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@ -1294,12 +1294,14 @@ def vm_flush_locks(zkhandler, vm):
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return output, retcode
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def vm_snapshot_receive_block(pool, volume, snapshot, size, stream, source_snapshot=None):
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def vm_snapshot_receive_block(
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pool, volume, snapshot, size, stream, source_snapshot=None
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):
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try:
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import rados
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import rbd
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cluster = rados.Rados(conffile='/etc/ceph/ceph.conf')
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cluster = rados.Rados(conffile="/etc/ceph/ceph.conf")
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cluster.connect()
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ioctx = cluster.open_ioctx(pool)
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@ -1321,9 +1323,9 @@ def vm_snapshot_receive_block(pool, volume, snapshot, size, stream, source_snaps
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break
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# Extract the offset and length (8 bytes each) and the data
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offset = int.from_bytes(chunk[:8], 'big')
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length = int.from_bytes(chunk[8:16], 'big')
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data = chunk[16:16 + length]
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offset = int.from_bytes(chunk[:8], "big")
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length = int.from_bytes(chunk[8:16], "big")
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data = chunk[16 : 16 + length]
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image.write(data, offset)
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image.create_snap(snapshot)
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@ -2018,6 +2018,100 @@ def cli_vm_snapshot_import(
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finish(retcode, retmsg)
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###############################################################################
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# > pvc vm snapshot send
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###############################################################################
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@click.command(
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name="send",
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short_help="Send a snapshot of a virtual machine to another PVC cluster.",
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)
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@connection_req
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@click.argument("domain")
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@click.argument("snapshot_name")
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@click.argument("destination")
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@click.option(
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"-k",
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"--destination-api-key",
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"destination_api_key",
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default=None,
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help="The API key of the destination cluster when specifying an API URI.",
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)
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@click.option(
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"-p",
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"--destination-pool",
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"destination_storage_pool",
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default=None,
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help="The target storage pool on the destination cluster, if it differs from the source pool.",
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)
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@click.option(
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"-i",
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"--incremental",
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"incremental_parent",
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default=None,
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help="Perform an incremental volume send from this parent snapshot.",
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)
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@click.option(
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"--wait/--no-wait",
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"wait_flag",
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is_flag=True,
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default=True,
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show_default=True,
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help="Wait or don't wait for task to complete, showing progress if waiting",
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)
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def cli_vm_snapshot_send(
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domain,
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snapshot_name,
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destination,
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destination_api_key,
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destination_storage_pool,
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incremental_parent,
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wait_flag,
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):
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"""
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Send the (existing) snapshot SNAPSHOT_NAME of virtual machine DOMAIN to the PVC cluster DESTINATION.
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DOMAIN may be a UUID or name.
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DESTINATION may either be a configured PVC connection name in this CLI instance (i.e. a valid local argument to "--connection"), or a full API URL, including port and API prefix; if using the latter, an API key can be specified with the "-k"/"--destination-api-key" option.
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The send will include the VM configuration, metainfo, and a point-in-time snapshot of all attached RBD volumes.
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By default, the storage pool of the sending cluster will be used at the destination cluster as well. If a pool of that name does not exist, specify one with the "-p"/"--detination-pool" option.
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Incremental sends are possible by specifying the "-i"/"--incremental-parent" option along with a parent snapshot name. To correctly receive, that parent snapshot must exist on DESTINATION.
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"""
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connections_config = get_store(CLI_CONFIG["store_path"])
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if destination in connections_config.keys():
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destination_cluster_config = connections_config[destination]
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destination_api_uri = "{}://{}:{}{}".format(
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destination_cluster_config["scheme"],
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destination_cluster_config["host"],
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destination_cluster_config["port"],
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CLI_CONFIG["api_prefix"],
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)
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destination_api_key = destination_cluster_config["api_key"]
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else:
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destination_api_uri = destination
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destination_api_key = destination_api_key
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retcode, retmsg = pvc.lib.vm.vm_send_snapshot(
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CLI_CONFIG,
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domain,
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snapshot_name,
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destination_api_uri,
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destination_api_key,
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destination_api_verify_ssl=CLI_CONFIG.get("verify_ssl"),
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destination_storage_pool=destination_storage_pool,
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incremental_parent=incremental_parent,
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wait_flag=wait_flag,
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)
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if retcode and wait_flag:
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retmsg = wait_for_celery_task(CLI_CONFIG, retmsg)
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finish(retcode, retmsg)
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###############################################################################
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# > pvc vm backup
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###############################################################################
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@ -6588,6 +6682,7 @@ cli_vm_snapshot.add_command(cli_vm_snapshot_remove)
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cli_vm_snapshot.add_command(cli_vm_snapshot_rollback)
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cli_vm_snapshot.add_command(cli_vm_snapshot_export)
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cli_vm_snapshot.add_command(cli_vm_snapshot_import)
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cli_vm_snapshot.add_command(cli_vm_snapshot_send)
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cli_vm.add_command(cli_vm_snapshot)
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cli_vm_backup.add_command(cli_vm_backup_create)
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cli_vm_backup.add_command(cli_vm_backup_restore)
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@ -595,6 +595,43 @@ def vm_import_snapshot(
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return get_wait_retdata(response, wait_flag)
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def vm_send_snapshot(
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config,
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vm,
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snapshot_name,
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destination_api_uri,
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destination_api_key,
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destination_api_verify_ssl=True,
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destination_storage_pool=None,
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incremental_parent=None,
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wait_flag=True,
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):
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"""
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Send an (existing) snapshot of a VM's disks andconfiguration to a destination PVC cluster, optionally
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incremental with incremental_parent
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API endpoint: POST /vm/{vm}/snapshot/send
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API arguments: snapshot_name=snapshot_name, destination_api_uri=destination_api_uri, destination_api_key=destination_api_key, incremental_parent=incremental_parent
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API schema: {"message":"{data}"}
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"""
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params = {
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"snapshot_name": snapshot_name,
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"destination_api_uri": destination_api_uri,
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"destination_api_key": destination_api_key,
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"destination_api_verify_ssl": destination_api_verify_ssl,
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}
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if destination_storage_pool is not None:
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params["destination_storage_pool"] = destination_storage_pool
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if incremental_parent is not None:
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params["incremental_parent"] = incremental_parent
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response = call_api(
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config, "post", "/vm/{vm}/snapshot/send".format(vm=vm), params=params
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)
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return get_wait_retdata(response, wait_flag)
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def vm_autobackup(config, email_recipients=None, force_full_flag=False, wait_flag=True):
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"""
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Perform a cluster VM autobackup
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@ -3119,3 +3119,418 @@ def vm_worker_import_snapshot(
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current=current_stage,
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total=total_stages,
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)
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def vm_worker_send_snapshot(
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zkhandler,
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celery,
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domain,
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snapshot_name,
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destination_api_uri,
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destination_api_key,
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destination_api_verify_ssl=True,
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incremental_parent=None,
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destination_storage_pool=None,
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):
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import requests
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import rados
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import rbd
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from packaging.version import parse as parse_version
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current_stage = 0
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total_stages = 1
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start(
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celery,
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f"Sending snapshot '{snapshot_name}' of VM '{domain}' to remote cluster '{destination_api_uri}'",
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current=current_stage,
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total=total_stages,
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)
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# Validate that VM exists in cluster
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dom_uuid = getDomainUUID(zkhandler, domain)
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if not dom_uuid:
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fail(
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celery,
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f"Could not find VM '{domain}' in the cluster",
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)
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return False
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# Get our side's VM configuration details
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vm_detail = get_list(zkhandler, limit=dom_uuid, is_fuzzy=False)[1][0]
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if not isinstance(vm_detail, dict):
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fail(
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celery,
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f"VM listing returned invalid data: {vm_detail}",
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)
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return False
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# Check if the snapshot exists
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if not zkhandler.exists(
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("domain.snapshots", dom_uuid, "domain_snapshot.name", snapshot_name)
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):
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fail(
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celery,
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f"Could not find snapshot '{snapshot_name}' of VM '{domain}'",
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)
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return False
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# Check if the incremental parent exists
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if incremental_parent is not None and not zkhandler.exists(
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("domain.snapshots", dom_uuid, "domain_snapshot.name", incremental_parent)
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):
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fail(
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celery,
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f"Could not find snapshot '{snapshot_name}' of VM '{domain}'",
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)
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return False
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# Validate that the destination cluster can be reached
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destination_api_timeout = (3.05, 172800)
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destination_api_headers = {
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"X-Api-Key": destination_api_key,
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"Content-Type": "application/octet-stream",
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}
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try:
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# Hit the API root; this should return "PVC API version x"
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response = requests.get(
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f"{destination_api_uri}/",
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timeout=destination_api_timeout,
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headers=None,
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params=None,
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data=None,
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verify=destination_api_verify_ssl,
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)
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if "PVC API" not in response.json().get("message"):
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raise ValueError("Remote API is not a PVC API or incorrect URI given")
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except requests.exceptions.ConnectionError as e:
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fail(
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celery,
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f"Connection to remote API timed out: {e}",
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)
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return False
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except ValueError as e:
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fail(
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celery,
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f"Connection to remote API is not valid: {e}",
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)
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return False
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except Exception as e:
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fail(
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celery,
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f"Connection to remote API failed: {e}",
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)
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return False
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# Hit the API "/status" endpoint to validate API key and cluster status
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response = requests.get(
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f"{destination_api_uri}/status",
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timeout=destination_api_timeout,
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headers=destination_api_headers,
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params=None,
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data=None,
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verify=destination_api_verify_ssl,
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)
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destination_cluster_status = response.json()
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current_destination_pvc_version = destination_cluster_status.get(
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"pvc_version", None
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)
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if current_destination_pvc_version is None:
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fail(
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celery,
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"Connection to remote API failed: no PVC version information returned",
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)
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return False
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expected_destination_pvc_version = "0.9.100" # TODO: 0.9.101 when completed
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# Work around development versions
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current_destination_pvc_version = re.sub(
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r"~git-.*", "", current_destination_pvc_version
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)
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# Compare versions
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if parse_version(current_destination_pvc_version) < parse_version(
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expected_destination_pvc_version
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):
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fail(
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celery,
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f"Remote PVC cluster is too old: requires version {expected_destination_pvc_version} or higher",
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)
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return False
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# Check if the VM already exists on the remote
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response = requests.get(
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f"{destination_api_uri}/vm/{domain}",
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timeout=destination_api_timeout,
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headers=destination_api_headers,
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params=None,
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data=None,
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verify=destination_api_verify_ssl,
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)
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destination_vm_status = response.json()
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current_destination_vm_state = destination_vm_status.get("state", None)
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if (
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current_destination_vm_state is not None
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and current_destination_vm_state != "mirror"
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):
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fail(
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celery,
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"Remote PVC VM exists and is not a mirror",
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)
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return False
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# Get details about VM snapshot
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_, snapshot_timestamp, snapshot_xml, snapshot_rbdsnaps = zkhandler.read_many(
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[
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(
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(
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"domain.snapshots",
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dom_uuid,
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"domain_snapshot.name",
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snapshot_name,
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)
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),
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(
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(
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"domain.snapshots",
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dom_uuid,
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"domain_snapshot.timestamp",
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snapshot_name,
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)
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),
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(
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(
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"domain.snapshots",
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dom_uuid,
|
||||
"domain_snapshot.xml",
|
||||
snapshot_name,
|
||||
)
|
||||
),
|
||||
(
|
||||
(
|
||||
"domain.snapshots",
|
||||
dom_uuid,
|
||||
"domain_snapshot.rbd_snapshots",
|
||||
snapshot_name,
|
||||
)
|
||||
),
|
||||
]
|
||||
)
|
||||
snapshot_rbdsnaps = snapshot_rbdsnaps.split(",")
|
||||
|
||||
# Get details about remote VM snapshots
|
||||
destination_vm_snapshots = destination_vm_status.get("snapshots", [])
|
||||
|
||||
# Check if this snapshot is in the remote list already
|
||||
if snapshot_name in [s["name"] for s in destination_vm_snapshots]:
|
||||
fail(
|
||||
celery,
|
||||
f"Snapshot {snapshot_name} already exists on the target",
|
||||
)
|
||||
return False
|
||||
|
||||
# Check if this snapshot is older than the latest remote VM snapshot
|
||||
if (
|
||||
len(destination_vm_snapshots) > 0
|
||||
and snapshot_timestamp < destination_vm_snapshots[0]["timestamp"]
|
||||
):
|
||||
fail(
|
||||
celery,
|
||||
f"Target has a newer snapshot ({destination_vm_snapshots[0]['name']}); cannot send old snapshot {snapshot_name}",
|
||||
)
|
||||
return False
|
||||
|
||||
# Check that our incremental parent exists on the remote VM
|
||||
if incremental_parent is not None:
|
||||
if incremental_parent not in [s["name"] for s in destination_vm_snapshots]:
|
||||
fail(
|
||||
celery,
|
||||
f"Can not send incremental for a snapshot ({incremental_parent}) which does not exist on the target",
|
||||
)
|
||||
return False
|
||||
|
||||
# Begin send, set stages
|
||||
total_stages = (
|
||||
2
|
||||
+ (2 * len(snapshot_rbdsnaps))
|
||||
+ (len(snapshot_rbdsnaps) if current_destination_vm_state is None else 0)
|
||||
)
|
||||
|
||||
# Create the block devices on the remote side if this is a new VM send
|
||||
for rbd_detail in [r for r in vm_detail["disks"] if r["type"] == "rbd"]:
|
||||
rbd_name = rbd_detail["name"]
|
||||
pool, volume = rbd_name.split("/")
|
||||
|
||||
current_stage += 1
|
||||
update(
|
||||
celery,
|
||||
f"Preparing remote volume for {rbd_name}@{snapshot_name}",
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
|
||||
# Get the storage volume details
|
||||
retcode, retdata = ceph.get_list_volume(zkhandler, pool, volume, is_fuzzy=False)
|
||||
if not retcode or len(retdata) != 1:
|
||||
if len(retdata) < 1:
|
||||
error_message = f"No detail returned for volume {rbd_name}"
|
||||
elif len(retdata) > 1:
|
||||
error_message = f"Multiple details returned for volume {rbd_name}"
|
||||
else:
|
||||
error_message = f"Error getting details for volume {rbd_name}"
|
||||
fail(
|
||||
celery,
|
||||
error_message,
|
||||
)
|
||||
return False
|
||||
|
||||
try:
|
||||
size_bytes = ceph.format_bytes_fromhuman(retdata[0]["stats"]["size"])
|
||||
except Exception as e:
|
||||
error_message = f"Failed to get volume size for {rbd_name}: {e}"
|
||||
|
||||
if destination_storage_pool is not None:
|
||||
pool = destination_storage_pool
|
||||
|
||||
if current_destination_vm_state is None:
|
||||
current_stage += 1
|
||||
update(
|
||||
celery,
|
||||
f"Creating remote volume {pool}/{volume} for {rbd_name}@{snapshot_name}",
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
|
||||
# Check if the volume exists on the target
|
||||
response = requests.get(
|
||||
f"{destination_api_uri}/storage/ceph/volume/{pool}/{volume}",
|
||||
timeout=destination_api_timeout,
|
||||
headers=destination_api_headers,
|
||||
params=None,
|
||||
data=None,
|
||||
verify=destination_api_verify_ssl,
|
||||
)
|
||||
if response.status_code != 404:
|
||||
fail(
|
||||
celery,
|
||||
f"Remote storage pool {pool} already contains volume {volume}",
|
||||
)
|
||||
return False
|
||||
|
||||
# Create the volume on the target
|
||||
params = {
|
||||
"size": size_bytes,
|
||||
}
|
||||
response = requests.post(
|
||||
f"{destination_api_uri}/storage/ceph/volume/{pool}/{volume}",
|
||||
timeout=destination_api_timeout,
|
||||
headers=destination_api_headers,
|
||||
params=params,
|
||||
data=None,
|
||||
verify=destination_api_verify_ssl,
|
||||
)
|
||||
destination_volume_create_status = response.json()
|
||||
if response.status_code != 200:
|
||||
fail(
|
||||
celery,
|
||||
f"Failed to create volume {rbd_name} on target: {destination_volume_create_status['message']}",
|
||||
)
|
||||
return False
|
||||
|
||||
# Send the volume to the remote
|
||||
cluster = rados.Rados(conffile="/etc/ceph/ceph.conf")
|
||||
cluster.connect()
|
||||
ioctx = cluster.open_ioctx(pool)
|
||||
image = rbd.Image(ioctx, name=volume, snapshot=snapshot_name, read_only=True)
|
||||
size = image.size()
|
||||
chunk_size_mb = 128
|
||||
|
||||
if incremental_parent is not None:
|
||||
# Diff between incremental_parent and snapshot
|
||||
celery_message = f"Sending diff between {incremental_parent} and {snapshot_name} for {rbd_name}"
|
||||
|
||||
def diff_chunker():
|
||||
def diff_cb(offset, length, exists):
|
||||
"""Callback to handle diff regions"""
|
||||
if exists:
|
||||
data = image.read(offset, length)
|
||||
yield (
|
||||
offset.to_bytes(8, "big") + length.to_bytes(8, "big") + data
|
||||
)
|
||||
|
||||
image.set_snap(incremental_parent)
|
||||
image.diff_iterate(0, size, incremental_parent, diff_cb)
|
||||
|
||||
data_stream = diff_chunker()
|
||||
else:
|
||||
# Full image transfer
|
||||
celery_message = f"Sending full image of {rbd_name}@{snapshot_name}"
|
||||
|
||||
def chunker():
|
||||
chunk_size = 1024 * 1024 * chunk_size_mb
|
||||
current_chunk = 0
|
||||
last_chunk_time = time.time()
|
||||
while current_chunk < size:
|
||||
chunk = image.read(current_chunk, chunk_size)
|
||||
yield chunk
|
||||
current_chunk += chunk_size
|
||||
current_chunk_time = time.time()
|
||||
chunk_time = current_chunk_time - last_chunk_time
|
||||
last_chunk_time = current_chunk_time
|
||||
chunk_speed = round(chunk_size_mb / chunk_time, 1)
|
||||
update(
|
||||
celery,
|
||||
celery_message + f" ({chunk_speed} MB/s)",
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
|
||||
data_stream = chunker()
|
||||
|
||||
current_stage += 1
|
||||
update(
|
||||
celery,
|
||||
celery_message,
|
||||
current=current_stage,
|
||||
total=total_stages,
|
||||
)
|
||||
|
||||
send_params = {
|
||||
"pool": pool,
|
||||
"volume": volume,
|
||||
"snapshot": snapshot_name,
|
||||
"size": size,
|
||||
"source_snapshot": incremental_parent,
|
||||
}
|
||||
send_headers = {
|
||||
"X-Api-Key": destination_api_key,
|
||||
"Content-Type": "application/octet-stream",
|
||||
"Transfer-Encoding": None, # Disable chunked transfer encoding
|
||||
}
|
||||
try:
|
||||
response = requests.post(
|
||||
f"{destination_api_uri}/storage/ceph/volume/{pool}/{volume}",
|
||||
timeout=destination_api_timeout,
|
||||
headers=send_headers,
|
||||
params=send_params,
|
||||
data=data_stream,
|
||||
verify=destination_api_verify_ssl,
|
||||
)
|
||||
response.raise_for_status()
|
||||
except Exception as e:
|
||||
fail(
|
||||
celery,
|
||||
f"Failed to send snapshot: {e}",
|
||||
)
|
||||
return False
|
||||
finally:
|
||||
image.close()
|
||||
ioctx.close()
|
||||
cluster.shutdown()
|
||||
|
||||
# Send the VM configuration
|
||||
# if current_destination_vm_state is None:
|
||||
# This is a new VM, so define it
|
||||
# response = requests.post()
|
||||
# else:
|
||||
# This is a modification
|
||||
# response = requests.post()
|
||||
|
|
|
@ -33,6 +33,7 @@ from daemon_lib.vm import (
|
|||
vm_worker_rollback_snapshot,
|
||||
vm_worker_export_snapshot,
|
||||
vm_worker_import_snapshot,
|
||||
vm_worker_send_snapshot,
|
||||
)
|
||||
from daemon_lib.ceph import (
|
||||
osd_worker_add_osd,
|
||||
|
@ -227,6 +228,54 @@ def vm_import_snapshot(
|
|||
)
|
||||
|
||||
|
||||
@celery.task(name="vm.send_snapshot", bind=True, routing_key="run_on")
|
||||
def vm_send_snapshot(
|
||||
self,
|
||||
domain=None,
|
||||
snapshot_name=None,
|
||||
destination_api_uri="",
|
||||
destination_api_key="",
|
||||
destination_api_verify_ssl=True,
|
||||
incremental_parent=None,
|
||||
destination_storage_pool=None,
|
||||
run_on="primary",
|
||||
):
|
||||
@ZKConnection(config)
|
||||
def run_vm_send_snapshot(
|
||||
zkhandler,
|
||||
self,
|
||||
domain,
|
||||
snapshot_name,
|
||||
destination_api_uri,
|
||||
destination_api_key,
|
||||
destination_api_verify_ssl=True,
|
||||
incremental_parent=None,
|
||||
destination_storage_pool=None,
|
||||
):
|
||||
return vm_worker_send_snapshot(
|
||||
zkhandler,
|
||||
self,
|
||||
domain,
|
||||
snapshot_name,
|
||||
destination_api_uri,
|
||||
destination_api_key,
|
||||
destination_api_verify_ssl=destination_api_verify_ssl,
|
||||
incremental_parent=incremental_parent,
|
||||
destination_storage_pool=destination_storage_pool,
|
||||
)
|
||||
|
||||
return run_vm_send_snapshot(
|
||||
self,
|
||||
domain,
|
||||
snapshot_name,
|
||||
destination_api_uri,
|
||||
destination_api_key,
|
||||
destination_api_verify_ssl=destination_api_verify_ssl,
|
||||
incremental_parent=incremental_parent,
|
||||
destination_storage_pool=destination_storage_pool,
|
||||
)
|
||||
|
||||
|
||||
@celery.task(name="osd.add", bind=True, routing_key="run_on")
|
||||
def osd_add(
|
||||
self,
|
||||
|
|
Loading…
Reference in New Issue