Add VM snapshots functionality
Adds the ability to create snapshots of an entire VM, including all its RBD disks and the VM XML config, though not any PVC metadata.
This commit is contained in:
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daemon-common/migrations/versions/14.json
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daemon-common/migrations/versions/14.json
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{"version": "14", "root": "", "base": {"root": "", "schema": "/schema", "schema.version": "/schema/version", "config": "/config", "config.maintenance": "/config/maintenance", "config.primary_node": "/config/primary_node", "config.primary_node.sync_lock": "/config/primary_node/sync_lock", "config.upstream_ip": "/config/upstream_ip", "config.migration_target_selector": "/config/migration_target_selector", "logs": "/logs", "faults": "/faults", "node": "/nodes", "domain": "/domains", "network": "/networks", "storage": "/ceph", "storage.health": "/ceph/health", "storage.util": "/ceph/util", "osd": "/ceph/osds", "pool": "/ceph/pools", "volume": "/ceph/volumes", "snapshot": "/ceph/snapshots"}, "logs": {"node": "", "messages": "/messages"}, "faults": {"id": "", "last_time": "/last_time", "first_time": "/first_time", "ack_time": "/ack_time", "status": "/status", "delta": "/delta", "message": "/message"}, "node": {"name": "", "keepalive": "/keepalive", "mode": "/daemonmode", "data.active_schema": "/activeschema", "data.latest_schema": "/latestschema", "data.static": "/staticdata", "data.pvc_version": "/pvcversion", "running_domains": "/runningdomains", "count.provisioned_domains": "/domainscount", "count.networks": "/networkscount", "state.daemon": "/daemonstate", "state.router": "/routerstate", "state.domain": "/domainstate", "cpu.load": "/cpuload", "vcpu.allocated": "/vcpualloc", "memory.total": "/memtotal", "memory.used": "/memused", "memory.free": "/memfree", "memory.allocated": "/memalloc", "memory.provisioned": "/memprov", "ipmi.hostname": "/ipmihostname", "ipmi.username": "/ipmiusername", "ipmi.password": "/ipmipassword", "sriov": "/sriov", "sriov.pf": "/sriov/pf", "sriov.vf": "/sriov/vf", "monitoring.plugins": "/monitoring_plugins", "monitoring.data": "/monitoring_data", "monitoring.health": "/monitoring_health", "network.stats": "/network_stats"}, "monitoring_plugin": {"name": "", "last_run": "/last_run", "health_delta": "/health_delta", "message": "/message", "data": "/data", "runtime": "/runtime"}, "sriov_pf": {"phy": "", "mtu": "/mtu", "vfcount": "/vfcount"}, "sriov_vf": {"phy": "", "pf": "/pf", "mtu": "/mtu", "mac": "/mac", "phy_mac": "/phy_mac", "config": "/config", "config.vlan_id": "/config/vlan_id", "config.vlan_qos": "/config/vlan_qos", "config.tx_rate_min": "/config/tx_rate_min", "config.tx_rate_max": "/config/tx_rate_max", "config.spoof_check": "/config/spoof_check", "config.link_state": "/config/link_state", "config.trust": "/config/trust", "config.query_rss": "/config/query_rss", "pci": "/pci", "pci.domain": "/pci/domain", "pci.bus": "/pci/bus", "pci.slot": "/pci/slot", "pci.function": "/pci/function", "used": "/used", "used_by": "/used_by"}, "domain": {"name": "", "xml": "/xml", "state": "/state", "profile": "/profile", "stats": "/stats", "node": "/node", "last_node": "/lastnode", "failed_reason": "/failedreason", "storage.volumes": "/rbdlist", "console.log": "/consolelog", "console.vnc": "/vnc", "meta.autostart": "/node_autostart", "meta.migrate_method": "/migration_method", "meta.migrate_max_downtime": "/migration_max_downtime", "meta.node_selector": "/node_selector", "meta.node_limit": "/node_limit", "meta.tags": "/tags", "migrate.sync_lock": "/migrate_sync_lock", "snapshots": "/snapshots"}, "tag": {"name": "", "type": "/type", "protected": "/protected"}, "domain_snapshot": {"name": "", "is_backup": "/is_backup", "xml": "/xml", "rbd_snapshots": "/rbdsnaplist"}, "network": {"vni": "", "type": "/nettype", "mtu": "/mtu", "rule": "/firewall_rules", "rule.in": "/firewall_rules/in", "rule.out": "/firewall_rules/out", "nameservers": "/name_servers", "domain": "/domain", "reservation": "/dhcp4_reservations", "lease": "/dhcp4_leases", "ip4.gateway": "/ip4_gateway", "ip4.network": "/ip4_network", "ip4.dhcp": "/dhcp4_flag", "ip4.dhcp_start": "/dhcp4_start", "ip4.dhcp_end": "/dhcp4_end", "ip6.gateway": "/ip6_gateway", "ip6.network": "/ip6_network", "ip6.dhcp": "/dhcp6_flag"}, "reservation": {"mac": "", "ip": "/ipaddr", "hostname": "/hostname"}, "lease": {"mac": "", "ip": "/ipaddr", "hostname": "/hostname", "expiry": "/expiry", "client_id": "/clientid"}, "rule": {"description": "", "rule": "/rule", "order": "/order"}, "osd": {"id": "", "node": "/node", "device": "/device", "db_device": "/db_device", "fsid": "/fsid", "ofsid": "/fsid/osd", "cfsid": "/fsid/cluster", "lvm": "/lvm", "vg": "/lvm/vg", "lv": "/lvm/lv", "is_split": "/is_split", "stats": "/stats"}, "pool": {"name": "", "pgs": "/pgs", "tier": "/tier", "stats": "/stats"}, "volume": {"name": "", "stats": "/stats"}, "snapshot": {"name": "", "stats": "/stats"}}
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@ -306,6 +306,7 @@ def define_vm(
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(("domain.meta.node_selector", dom_uuid), str(node_selector).lower()),
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(("domain.meta.tags", dom_uuid), ""),
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(("domain.migrate.sync_lock", dom_uuid), ""),
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(("domain.snapshots", dom_uuid), ""),
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]
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)
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@ -1245,6 +1246,107 @@ def get_list(
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return True, sorted(vm_data_list, key=lambda d: d["name"])
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#
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# VM Snapshot Tasks
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#
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def create_vm_snapshot(zkhandler, domain, snapshot_name=None):
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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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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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if snapshot_name is None:
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now = datetime.now()
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datestring = now.strftime("%Y%m%d%H%M%S")
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snapshot_name = f"snapshot_{datestring}"
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else:
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reg = re.compile("^[a-z0-9.-_]+$")
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if not reg.match(snapshot_name):
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return (
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False,
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f'ERROR: Snapshot name "{snapshot_name}" contains invalid characters; only alphanumeric, ".", "-", and "_" characters are allowed!',
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)
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tstart = time.time()
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# Get the list of all RBD volumes
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rbd_list = zkhandler.read(("domain.storage.volumes", dom_uuid)).split(",")
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snap_list = list()
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# If a snapshot fails, clean up any snapshots that were successfuly created
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def cleanup_failure():
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for snapshot in snap_list:
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rbd, snapshot_name = snapshot.split("@")
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pool, volume = rbd.split("/")
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# We capture no output here, because if this fails too we're in a deep
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# error chain and will just ignore it
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ceph.remove_snapshot(zkhandler, pool, volume, snapshot_name)
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# Iterrate through and create a snapshot for each RBD volume
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for rbd in rbd_list:
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pool, volume = rbd.split("/")
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ret, msg = ceph.add_snapshot(zkhandler, pool, volume, snapshot_name)
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if not ret:
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cleanup_failure()
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return False, msg
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else:
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snap_list.append(f"{pool}/{volume}@{snapshot_name}")
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# Get the current domain XML
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vm_config = zkhandler.read(("domain.xml", dom_uuid))
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# Add the snapshot entry to Zookeeper
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zkhandler.write(
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[
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(
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("domain.snapshots", dom_uuid, "domain_snapshot.name", snapshot_name),
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snapshot_name,
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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.is_backup",
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snapshot_name,
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),
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False,
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),
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(
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("domain.snapshots", dom_uuid, "domain_snapshot.xml", snapshot_name),
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vm_config,
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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.rbd_snapshots",
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snapshot_name,
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),
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",".join(snap_list),
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),
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]
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)
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tend = time.time()
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ttot = round(tend - tstart, 2)
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return (
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True,
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f'Successfully created snapshot "{snapshot_name}" of VM "{domain}" in {ttot}s.',
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)
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def rollback_vm_snapshot(zkhandler, domain, snapshot_name):
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pass
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def remove_vm_snapshot(zkhandler, domain, snapshot_name):
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pass
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#
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# VM Backup Tasks
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#
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def backup_vm(
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zkhandler, domain, backup_path, incremental_parent=None, retain_snapshot=False
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):
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@ -573,7 +573,7 @@ class ZKHandler(object):
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#
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class ZKSchema(object):
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# Current version
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_version = 13
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_version = 14
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# Root for doing nested keys
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_schema_root = ""
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@ -713,13 +713,21 @@ class ZKSchema(object):
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"meta.node_limit": "/node_limit",
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"meta.tags": "/tags",
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"migrate.sync_lock": "/migrate_sync_lock",
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"snapshots": "/snapshots",
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},
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# The schema of an individual domain tag entry (/domains/{domain}/tags/{tag})
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"tag": {
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"name": "",
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"name": "", # The root key
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"type": "/type",
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"protected": "/protected",
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}, # The root key
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},
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# The schema of an individual domain snapshot entry (/domains/{domain}/snapshots/{snapshot})
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"domain_snapshot": {
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"name": "", # The root key
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"is_backup": "/is_backup",
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"xml": "/xml",
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"rbd_snapshots": "/rbdsnaplist",
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},
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# The schema of an individual network entry (/networks/{vni})
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"network": {
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"vni": "", # The root key
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