def delete_replica_disks(self, ctxt, replica_id):
replica = self._get_replica(ctxt, replica_id)
self._check_replica_running_executions(ctxt, replica)
execution = models.TasksExecution()
execution.id = str(uuid.uuid4())
execution.status = constants.EXECUTION_STATUS_RUNNING
execution.action = replica
has_tasks = False
for instance in replica.instances:
if (instance in replica.info
and "volumes_info" in replica.info[instance]):
self._create_task(instance,
constants.TASK_TYPE_DELETE_REPLICA_DISKS,
execution)
has_tasks = True
if not has_tasks:
raise exception.InvalidReplicaState(
"This replica does not have volumes information for any "
"instance. Ensure that the replica has been executed "
"successfully priorly")
db_api.add_replica_tasks_execution(ctxt, execution)
LOG.info("Replica tasks execution created: %s", execution.id)
self._begin_tasks(ctxt, execution, replica.info)
return self.get_replica_tasks_execution(ctxt, replica_id, execution.id)
def _check_running_replica_migrations(ctxt, replica_id):
migrations = db_api.get_replica_migrations(ctxt, replica_id)
if [
m.id for m in migrations
if m.executions[0].status == constants.EXECUTION_STATUS_RUNNING
]:
raise exception.InvalidReplicaState(
"This replica is currently being migrated")
def cancel_replica_tasks_execution(self, ctxt, replica_id, execution_id,
force):
execution = self._get_replica_tasks_execution(ctxt, replica_id,
execution_id)
if execution.status != constants.EXECUTION_STATUS_RUNNING:
raise exception.InvalidReplicaState(
"The replica tasks execution is not running")
self._cancel_tasks_execution(ctxt, execution, force)
def _check_valid_replica_tasks_execution(replica, force=False):
sorted_executions = sorted(replica.executions,
key=lambda e: e.number,
reverse=True)
if (force and sorted_executions[0].status !=
constants.EXECUTION_STATUS_COMPLETED):
raise exception.InvalidReplicaState(
"The last replica tasks execution was not successful. "
"Perform a forced migration if you wish to perform a "
"migration without a successful last replica execution")
elif not [
e for e in sorted_executions
if e.status == constants.EXECUTION_STATUS_COMPLETED
]:
raise exception.InvalidReplicaState(
"A replica must have been executed succesfully in order "
"to be migrated")
def deploy_replica_instances(self,
ctxt,
replica_id,
clone_disks,
force,
skip_os_morphing=False):
replica = self._get_replica(ctxt, replica_id)
self._check_replica_running_executions(ctxt, replica)
self._check_valid_replica_tasks_execution(replica, force)
destination_endpoint = self.get_endpoint(
ctxt, replica.destination_endpoint_id)
destination_provider_types = self._get_provider_types(
ctxt, destination_endpoint)
for instance, info in replica.info.items():
if not info.get("volumes_info"):
raise exception.InvalidReplicaState(
"The replica doesn't contain volumes information for "
"instance: %s. If replicated disks are deleted, the "
"replica needs to be executed anew before a migration can "
"occur" % instance)
instances = replica.instances
migration = models.Migration()
migration.id = str(uuid.uuid4())
migration.origin_endpoint_id = replica.origin_endpoint_id
migration.destination_endpoint_id = replica.destination_endpoint_id
migration.destination_environment = replica.destination_environment
migration.source_environment = replica.source_environment
migration.network_map = replica.network_map
migration.storage_mappings = replica.storage_mappings
migration.instances = instances
migration.replica = replica
migration.info = replica.info
for instance in instances:
migration.info[instance]["clone_disks"] = clone_disks
execution = models.TasksExecution()
migration.executions = [execution]
execution.status = constants.EXECUTION_STATUS_RUNNING
execution.number = 1
for instance in instances:
validate_replica_desployment_inputs_task = self._create_task(
instance,
constants.TASK_TYPE_VALIDATE_REPLICA_DEPLOYMENT_INPUTS,
execution)
create_snapshot_task_depends_on = [
validate_replica_desployment_inputs_task.id
]
if (constants.PROVIDER_TYPE_INSTANCE_FLAVOR
in destination_provider_types):
get_optimal_flavor_task = self._create_task(
instance,
constants.TASK_TYPE_GET_OPTIMAL_FLAVOR,
execution,
depends_on=[validate_replica_desployment_inputs_task.id])
create_snapshot_task_depends_on.append(
get_optimal_flavor_task.id)
create_snapshot_task = self._create_task(
instance,
constants.TASK_TYPE_CREATE_REPLICA_DISK_SNAPSHOTS,
execution,
depends_on=create_snapshot_task_depends_on)
deploy_replica_task = self._create_task(
instance, constants.TASK_TYPE_DEPLOY_REPLICA_INSTANCE,
execution, [create_snapshot_task.id])
if not skip_os_morphing:
task_deploy_os_morphing_resources = self._create_task(
instance,
constants.TASK_TYPE_DEPLOY_OS_MORPHING_RESOURCES,
execution,
depends_on=[deploy_replica_task.id])
task_osmorphing = self._create_task(
instance,
constants.TASK_TYPE_OS_MORPHING,
execution,
depends_on=[task_deploy_os_morphing_resources.id])
task_delete_os_morphing_resources = self._create_task(
instance,
constants.TASK_TYPE_DELETE_OS_MORPHING_RESOURCES,
execution,
depends_on=[task_osmorphing.id],
on_error=True)
next_task = task_delete_os_morphing_resources
else:
next_task = deploy_replica_task
finalize_deployment_task = self._create_task(
instance,
constants.TASK_TYPE_FINALIZE_REPLICA_INSTANCE_DEPLOYMENT,
execution,
depends_on=[next_task.id])
self._create_task(
instance,
constants.TASK_TYPE_DELETE_REPLICA_DISK_SNAPSHOTS,
execution,
depends_on=[finalize_deployment_task.id],
on_error=clone_disks)
cleanup_deployment_task = self._create_task(
instance,
constants.TASK_TYPE_CLEANUP_FAILED_REPLICA_INSTANCE_DEPLOYMENT,
execution,
on_error=True)
if not clone_disks:
self._create_task(
instance,
constants.TASK_TYPE_RESTORE_REPLICA_DISK_SNAPSHOTS,
execution,
depends_on=[cleanup_deployment_task.id],
on_error=True)
db_api.add_migration(ctxt, migration)
LOG.info("Migration created: %s", migration.id)
self._begin_tasks(ctxt, execution, migration.info)
return self.get_migration(ctxt, migration.id)
