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Add VM snapshot send (initial)

This commit is contained in:
Joshua Boniface 2024-09-28 10:49:14 -04:00
parent 0d533f3658
commit f462ebbc6b
6 changed files with 728 additions and 5 deletions
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125
api-daemon/pvcapid/flaskapi.py
View File

@ -3572,6 +3572,131 @@ class API_VM_Snapshot_Import(Resource):
api.add_resource(API_VM_Snapshot_Import, "/vm/<vm>/snapshot/import")
# /vm/<vm>/snapshot/send
class API_VM_Snapshot_Send(Resource):
@RequestParser(
[
{
"name": "snapshot_name",
"required": True,
"helptext": "A snapshot name must be specified",
},
{
"name": "destination_api_uri",
"required": True,
"helptext": "A destination API URI must be specified",
},
{
"name": "destination_api_key",
"required": True,
"helptext": "A destination API key must be specified",
},
{
"name": "destination_api_verify_ssl",
"required": False,
},
{
"name": "incremental_parent",
"required": False,
},
{
"name": "destination_storage_pool",
"required": False,
},
]
)
@Authenticator
def post(self, vm, reqargs):
"""
Send a snapshot of a VM's disks and configuration to another PVC cluster
---
tags:
- vm
parameters:
- in: query
name: snapshot_name
type: string
required: true
description: The name of the snapshot to export (must exist)
- in: query
name: destination_api_uri
type: string
required: true
description: The base API URI of the destination PVC cluster (with prefix if applicable)
- in: query
name: destination_api_key
type: string
required: true
description: The API authentication key of the destination PVC cluster
- in: query
name: destination_api_verify_ssl
type: boolean
required: false
default: true
description: Whether or not to validate SSL certificates for an SSL-enabled destination API
- in: query
name: incremental_parent
type: string
required: false
description: A snapshot name to generate an incremental diff from; incremental send only if unset
- in: query
name: destination_storage_pool
type: string
required: false
default: source storage pool name
description: The remote cluster storage pool to create RBD volumes in, if different from the source storage pool
responses:
202:
description: Accepted
schema:
type: string
description: The Celery job ID of the task
400:
description: Execution error
schema:
type: object
id: Message
404:
description: Not found
schema:
type: object
id: Message
"""
snapshot_name = reqargs.get("snapshot_name", None)
destination_api_uri = reqargs.get("destination_api_uri", None)
destination_api_key = reqargs.get("destination_api_key", None)
destination_api_verify_ssl = bool(
strtobool(reqargs.get("destination_api_verify_ssl", "true"))
)
incremental_parent = reqargs.get("incremental_parent", None)
destination_storage_pool = reqargs.get("destination_storage_pool", None)
task = run_celery_task(
"vm.send_snapshot",
domain=vm,
snapshot_name=snapshot_name,
destination_api_uri=destination_api_uri,
destination_api_key=destination_api_key,
destination_api_verify_ssl=destination_api_verify_ssl,
incremental_parent=incremental_parent,
destination_storage_pool=destination_storage_pool,
run_on="primary",
)
return (
{
"task_id": task.id,
"task_name": "vm.send_snapshot",
"run_on": f"{get_primary_node()} (primary)",
},
202,
{"Location": Api.url_for(api, API_Tasks_Element, task_id=task.id)},
)
api.add_resource(API_VM_Snapshot_Send, "/vm/<vm>/snapshot/send")
# /vm/<vm>/snapshot/receive/block
class API_VM_Snapshot_Receive_Block(Resource):
@RequestParser(

12
api-daemon/pvcapid/helper.py
View File

@ -1294,12 +1294,14 @@ def vm_flush_locks(zkhandler, vm):
return output, retcode
def vm_snapshot_receive_block(pool, volume, snapshot, size, stream, source_snapshot=None):
def vm_snapshot_receive_block(
pool, volume, snapshot, size, stream, source_snapshot=None
):
try:
import rados
import rbd
cluster = rados.Rados(conffile='/etc/ceph/ceph.conf')
cluster = rados.Rados(conffile="/etc/ceph/ceph.conf")
cluster.connect()
ioctx = cluster.open_ioctx(pool)
@ -1321,9 +1323,9 @@ def vm_snapshot_receive_block(pool, volume, snapshot, size, stream, source_snaps
break
# Extract the offset and length (8 bytes each) and the data
offset = int.from_bytes(chunk[:8], 'big')
length = int.from_bytes(chunk[8:16], 'big')
data = chunk[16:16 + length]
offset = int.from_bytes(chunk[:8], "big")
length = int.from_bytes(chunk[8:16], "big")
data = chunk[16 : 16 + length]
image.write(data, offset)
image.create_snap(snapshot)

95
client-cli/pvc/cli/cli.py
View File

@ -2018,6 +2018,100 @@ def cli_vm_snapshot_import(
finish(retcode, retmsg)
###############################################################################
# > pvc vm snapshot send
###############################################################################
@click.command(
name="send",
short_help="Send a snapshot of a virtual machine to another PVC cluster.",
)
@connection_req
@click.argument("domain")
@click.argument("snapshot_name")
@click.argument("destination")
@click.option(
"-k",
"--destination-api-key",
"destination_api_key",
default=None,
help="The API key of the destination cluster when specifying an API URI.",
)
@click.option(
"-p",
"--destination-pool",
"destination_storage_pool",
default=None,
help="The target storage pool on the destination cluster, if it differs from the source pool.",
)
@click.option(
"-i",
"--incremental",
"incremental_parent",
default=None,
help="Perform an incremental volume send from this parent snapshot.",
)
@click.option(
"--wait/--no-wait",
"wait_flag",
is_flag=True,
default=True,
show_default=True,
help="Wait or don't wait for task to complete, showing progress if waiting",
)
def cli_vm_snapshot_send(
domain,
snapshot_name,
destination,
destination_api_key,
destination_storage_pool,
incremental_parent,
wait_flag,
):
"""
Send the (existing) snapshot SNAPSHOT_NAME of virtual machine DOMAIN to the PVC cluster DESTINATION.
DOMAIN may be a UUID or name.
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.
The send will include the VM configuration, metainfo, and a point-in-time snapshot of all attached RBD volumes.
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.
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.
"""
connections_config = get_store(CLI_CONFIG["store_path"])
if destination in connections_config.keys():
destination_cluster_config = connections_config[destination]
destination_api_uri = "{}://{}:{}{}".format(
destination_cluster_config["scheme"],
destination_cluster_config["host"],
destination_cluster_config["port"],
CLI_CONFIG["api_prefix"],
)
destination_api_key = destination_cluster_config["api_key"]
else:
destination_api_uri = destination
destination_api_key = destination_api_key
retcode, retmsg = pvc.lib.vm.vm_send_snapshot(
CLI_CONFIG,
domain,
snapshot_name,
destination_api_uri,
destination_api_key,
destination_api_verify_ssl=CLI_CONFIG.get("verify_ssl"),
destination_storage_pool=destination_storage_pool,
incremental_parent=incremental_parent,
wait_flag=wait_flag,
)
if retcode and wait_flag:
retmsg = wait_for_celery_task(CLI_CONFIG, retmsg)
finish(retcode, retmsg)
###############################################################################
# > pvc vm backup
###############################################################################
@ -6588,6 +6682,7 @@ cli_vm_snapshot.add_command(cli_vm_snapshot_remove)
cli_vm_snapshot.add_command(cli_vm_snapshot_rollback)
cli_vm_snapshot.add_command(cli_vm_snapshot_export)
cli_vm_snapshot.add_command(cli_vm_snapshot_import)
cli_vm_snapshot.add_command(cli_vm_snapshot_send)
cli_vm.add_command(cli_vm_snapshot)
cli_vm_backup.add_command(cli_vm_backup_create)
cli_vm_backup.add_command(cli_vm_backup_restore)

37
client-cli/pvc/lib/vm.py
View File

@ -595,6 +595,43 @@ def vm_import_snapshot(
return get_wait_retdata(response, wait_flag)
def vm_send_snapshot(
config,
vm,
snapshot_name,
destination_api_uri,
destination_api_key,
destination_api_verify_ssl=True,
destination_storage_pool=None,
incremental_parent=None,
wait_flag=True,
):
"""
Send an (existing) snapshot of a VM's disks andconfiguration to a destination PVC cluster, optionally
incremental with incremental_parent
API endpoint: POST /vm/{vm}/snapshot/send
API arguments: snapshot_name=snapshot_name, destination_api_uri=destination_api_uri, destination_api_key=destination_api_key, incremental_parent=incremental_parent
API schema: {"message":"{data}"}
"""
params = {
"snapshot_name": snapshot_name,
"destination_api_uri": destination_api_uri,
"destination_api_key": destination_api_key,
"destination_api_verify_ssl": destination_api_verify_ssl,
}
if destination_storage_pool is not None:
params["destination_storage_pool"] = destination_storage_pool
if incremental_parent is not None:
params["incremental_parent"] = incremental_parent
response = call_api(
config, "post", "/vm/{vm}/snapshot/send".format(vm=vm), params=params
)
return get_wait_retdata(response, wait_flag)
def vm_autobackup(config, email_recipients=None, force_full_flag=False, wait_flag=True):
"""
Perform a cluster VM autobackup

415
daemon-common/vm.py
View File

@ -3119,3 +3119,418 @@ def vm_worker_import_snapshot(
current=current_stage,
total=total_stages,
)
def vm_worker_send_snapshot(
zkhandler,
celery,
domain,
snapshot_name,
destination_api_uri,
destination_api_key,
destination_api_verify_ssl=True,
incremental_parent=None,
destination_storage_pool=None,
):
import requests
import rados
import rbd
from packaging.version import parse as parse_version
current_stage = 0
total_stages = 1
start(
celery,
f"Sending snapshot '{snapshot_name}' of VM '{domain}' to remote cluster '{destination_api_uri}'",
current=current_stage,
total=total_stages,
)
# Validate that VM exists in cluster
dom_uuid = getDomainUUID(zkhandler, domain)
if not dom_uuid:
fail(
celery,
f"Could not find VM '{domain}' in the cluster",
)
return False
# Get our side's VM configuration details
vm_detail = get_list(zkhandler, limit=dom_uuid, is_fuzzy=False)[1][0]
if not isinstance(vm_detail, dict):
fail(
celery,
f"VM listing returned invalid data: {vm_detail}",
)
return False
# Check if the snapshot exists
if not zkhandler.exists(
("domain.snapshots", dom_uuid, "domain_snapshot.name", snapshot_name)
):
fail(
celery,
f"Could not find snapshot '{snapshot_name}' of VM '{domain}'",
)
return False
# Check if the incremental parent exists
if incremental_parent is not None and not zkhandler.exists(
("domain.snapshots", dom_uuid, "domain_snapshot.name", incremental_parent)
):
fail(
celery,
f"Could not find snapshot '{snapshot_name}' of VM '{domain}'",
)
return False
# Validate that the destination cluster can be reached
destination_api_timeout = (3.05, 172800)
destination_api_headers = {
"X-Api-Key": destination_api_key,
"Content-Type": "application/octet-stream",
}
try:
# Hit the API root; this should return "PVC API version x"
response = requests.get(
f"{destination_api_uri}/",
timeout=destination_api_timeout,
headers=None,
params=None,
data=None,
verify=destination_api_verify_ssl,
)
if "PVC API" not in response.json().get("message"):
raise ValueError("Remote API is not a PVC API or incorrect URI given")
except requests.exceptions.ConnectionError as e:
fail(
celery,
f"Connection to remote API timed out: {e}",
)
return False
except ValueError as e:
fail(
celery,
f"Connection to remote API is not valid: {e}",
)
return False
except Exception as e:
fail(
celery,
f"Connection to remote API failed: {e}",
)
return False
# Hit the API "/status" endpoint to validate API key and cluster status
response = requests.get(
f"{destination_api_uri}/status",
timeout=destination_api_timeout,
headers=destination_api_headers,
params=None,
data=None,
verify=destination_api_verify_ssl,
)
destination_cluster_status = response.json()
current_destination_pvc_version = destination_cluster_status.get(
"pvc_version", None
)
if current_destination_pvc_version is None:
fail(
celery,
"Connection to remote API failed: no PVC version information returned",
)
return False
expected_destination_pvc_version = "0.9.100" # TODO: 0.9.101 when completed
# Work around development versions
current_destination_pvc_version = re.sub(
r"~git-.*", "", current_destination_pvc_version
)
# Compare versions
if parse_version(current_destination_pvc_version) < parse_version(
expected_destination_pvc_version
):
fail(
celery,
f"Remote PVC cluster is too old: requires version {expected_destination_pvc_version} or higher",
)
return False
# Check if the VM already exists on the remote
response = requests.get(
f"{destination_api_uri}/vm/{domain}",
timeout=destination_api_timeout,
headers=destination_api_headers,
params=None,
data=None,
verify=destination_api_verify_ssl,
)
destination_vm_status = response.json()
current_destination_vm_state = destination_vm_status.get("state", None)
if (
current_destination_vm_state is not None
and current_destination_vm_state != "mirror"
):
fail(
celery,
"Remote PVC VM exists and is not a mirror",
)
return False
# Get details about VM snapshot
_, snapshot_timestamp, snapshot_xml, snapshot_rbdsnaps = zkhandler.read_many(
[
(
(
"domain.snapshots",
dom_uuid,
"domain_snapshot.name",
snapshot_name,
)
),
(
(
"domain.snapshots",
dom_uuid,
"domain_snapshot.timestamp",
snapshot_name,
)
),
(
(
"domain.snapshots",
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()

49
worker-daemon/pvcworkerd/Daemon.py
View File

@ -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,