Add Ceph block receive (initial)
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@ -3572,6 +3572,97 @@ 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/receive/block
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class API_VM_Snapshot_Receive_Block(Resource):
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@RequestParser(
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[
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{
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"name": "pool",
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"required": True,
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},
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{
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"name": "volume",
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"required": True,
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},
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{
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"name": "snapshot",
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"required": True,
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},
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{
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"name": "size",
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"required": True,
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},
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{
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"name": "source_snapshot",
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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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Receive a snapshot of a single RBD volume from another PVC cluster; may be full or incremental
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NOTICE: This is an API-internal endpoint used by /vm/<vm>/snapshot/send; it should never be called by a client.
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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: pool
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type: string
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required: true
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description: The name of the destination Ceph RBD data pool
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- in: query
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name: volume
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type: string
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required: true
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description: The name of the destination Ceph RBD volume
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- in: query
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name: snapshot
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type: string
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required: true
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description: The name of the destination Ceph RBD volume snapshot
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- in: query
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name: size
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type: integer
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required: true
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description: The size in bytes of the Ceph RBD volume
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- in: query
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name: source_snapshot
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type: string
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required: false
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description: The name of the destination Ceph RBD volume snapshot parent for incremental transfers
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responses:
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200:
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description: OK
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schema:
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type: object
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id: Message
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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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return api_helper.vm_snapshot_receive_block(
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reqargs.get("pool"),
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reqargs.get("volume") + "_recv",
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reqargs.get("snapshot"),
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int(reqargs.get("size")),
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flask.request.stream,
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source_snapshot=reqargs.get("source_snapshot"),
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)
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api.add_resource(API_VM_Snapshot_Receive_Block, "/vm/<vm>/snapshot/receive/block")
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# /vm/autobackup
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class API_VM_Autobackup_Root(Resource):
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@RequestParser(
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@ -1294,6 +1294,58 @@ 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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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.connect()
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ioctx = cluster.open_ioctx(pool)
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if not source_snapshot:
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rbd_inst = rbd.RBD()
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rbd_inst.create(ioctx, volume, size)
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image = rbd.Image(ioctx, volume)
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last_chunk = 0
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chunk_size = 1024 * 1024 * 128
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if source_snapshot:
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# Receiving diff data
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print(f"Applying diff between {source_snapshot} and {snapshot}")
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while True:
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chunk = stream.read(chunk_size)
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if not chunk:
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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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image.write(data, offset)
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image.create_snap(snapshot)
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else:
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# Receiving full image
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print(f"Importing full snapshot {snapshot}")
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while True:
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chunk = flask.request.stream.read(chunk_size)
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if not chunk:
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break
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image.write(chunk, last_chunk)
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last_chunk += len(chunk)
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image.create_snap(snapshot)
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image.close()
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ioctx.close()
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cluster.shutdown()
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except Exception as e:
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return {"message": f"Failed to import block device: {e}"}, 400
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#
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# Network functions
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#
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