Shared filesystem management project for OpenStack.
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# Copyright (c) 2015 Clinton Knight. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
NetApp Data ONTAP cDOT multi-SVM storage driver library.
This library extends the abstract base library and completes the multi-SVM
functionality needed by the cDOT multi-SVM Manila driver. This library
variant creates Data ONTAP storage virtual machines (i.e. 'vservers')
as needed to provision shares.
"""
import copy
import re
from oslo_log import log
from oslo_serialization import jsonutils
from oslo_utils import excutils
from manila import exception
from manila.i18n import _
from manila.share.drivers.netapp.dataontap.client import client_cmode
from manila.share.drivers.netapp.dataontap.cluster_mode import data_motion
from manila.share.drivers.netapp.dataontap.cluster_mode import lib_base
from manila.share.drivers.netapp import utils as na_utils
from manila.share import utils as share_utils
from manila import utils
LOG = log.getLogger(__name__)
SUPPORTED_NETWORK_TYPES = (None, 'flat', 'vlan')
SEGMENTED_NETWORK_TYPES = ('vlan',)
DEFAULT_MTU = 1500
class NetAppCmodeMultiSVMFileStorageLibrary(
lib_base.NetAppCmodeFileStorageLibrary):
@na_utils.trace
def check_for_setup_error(self):
if self._have_cluster_creds:
if self.configuration.netapp_vserver:
msg = ('Vserver is specified in the configuration. This is '
'ignored when the driver is managing share servers.')
LOG.warning(msg)
else: # only have vserver creds, which is an error in multi_svm mode
msg = _('Cluster credentials must be specified in the '
'configuration when the driver is managing share servers.')
raise exception.InvalidInput(reason=msg)
# Ensure one or more aggregates are available.
if not self._find_matching_aggregates():
msg = _('No aggregates are available for provisioning shares. '
'Ensure that the configuration option '
'netapp_aggregate_name_search_pattern is set correctly.')
raise exception.NetAppException(msg)
(super(NetAppCmodeMultiSVMFileStorageLibrary, self).
check_for_setup_error())
@na_utils.trace
def _get_vserver(self, share_server=None, vserver_name=None):
if share_server:
backend_details = share_server.get('backend_details')
vserver = backend_details.get(
'vserver_name') if backend_details else None
if not vserver:
msg = _('Vserver name is absent in backend details. Please '
'check whether Vserver was created properly.')
raise exception.VserverNotSpecified(msg)
elif vserver_name:
vserver = vserver_name
else:
msg = _('Share server not provided')
raise exception.InvalidInput(reason=msg)
if not self._client.vserver_exists(vserver):
raise exception.VserverNotFound(vserver=vserver)
vserver_client = self._get_api_client(vserver)
return vserver, vserver_client
def _get_ems_pool_info(self):
return {
'pools': {
'vserver': None,
'aggregates': self._find_matching_aggregates(),
},
}
@na_utils.trace
def _handle_housekeeping_tasks(self):
"""Handle various cleanup activities."""
self._client.prune_deleted_nfs_export_policies()
self._client.prune_deleted_snapshots()
self._client.remove_unused_qos_policy_groups()
(super(NetAppCmodeMultiSVMFileStorageLibrary, self).
_handle_housekeeping_tasks())
@na_utils.trace
def _find_matching_aggregates(self):
"""Find all aggregates match pattern."""
aggregate_names = self._client.list_non_root_aggregates()
pattern = self.configuration.netapp_aggregate_name_search_pattern
return [aggr_name for aggr_name in aggregate_names
if re.match(pattern, aggr_name)]
@na_utils.trace
def setup_server(self, network_info, metadata=None):
"""Creates and configures new Vserver."""
vlan = network_info['segmentation_id']
ports = {}
for network_allocation in network_info['network_allocations']:
ports[network_allocation['id']] = network_allocation['ip_address']
@utils.synchronized('netapp-VLAN-%s' % vlan, external=True)
def setup_server_with_lock():
LOG.debug('Creating server %s', network_info['server_id'])
self._validate_network_type(network_info)
vserver_name = self._get_vserver_name(network_info['server_id'])
server_details = {
'vserver_name': vserver_name,
'ports': jsonutils.dumps(ports)
}
try:
self._create_vserver(vserver_name, network_info)
except Exception as e:
e.detail_data = {'server_details': server_details}
raise
return server_details
return setup_server_with_lock()
@na_utils.trace
def _validate_network_type(self, network_info):
"""Raises exception if the segmentation type is incorrect."""
if network_info['network_type'] not in SUPPORTED_NETWORK_TYPES:
msg = _('The specified network type %s is unsupported by the '
'NetApp clustered Data ONTAP driver')
raise exception.NetworkBadConfigurationException(
reason=msg % network_info['network_type'])
@na_utils.trace
def _get_vserver_name(self, server_id):
return self.configuration.netapp_vserver_name_template % server_id
@na_utils.trace
def _create_vserver(self, vserver_name, network_info):
"""Creates Vserver with given parameters if it doesn't exist."""
if self._client.vserver_exists(vserver_name):
msg = _('Vserver %s already exists.')
raise exception.NetAppException(msg % vserver_name)
# NOTE(lseki): If there's already an ipspace created for the same VLAN
# port, reuse it. It will be named after the previously created share
# server's neutron subnet id.
node_name = self._client.list_cluster_nodes()[0]
port = self._get_node_data_port(node_name)
vlan = network_info['segmentation_id']
ipspace_name = self._client.get_ipspace_name_for_vlan_port(
node_name, port, vlan) or self._create_ipspace(network_info)
LOG.debug('Vserver %s does not exist, creating.', vserver_name)
self._client.create_vserver(
vserver_name,
self.configuration.netapp_root_volume_aggregate,
self.configuration.netapp_root_volume,
self._find_matching_aggregates(),
ipspace_name)
vserver_client = self._get_api_client(vserver=vserver_name)
security_services = None
try:
self._create_vserver_lifs(vserver_name,
vserver_client,
network_info,
ipspace_name)
self._create_vserver_admin_lif(vserver_name,
vserver_client,
network_info,
ipspace_name)
self._create_vserver_routes(vserver_client,
network_info)
vserver_client.enable_nfs(
self.configuration.netapp_enabled_share_protocols)
security_services = network_info.get('security_services')
if security_services:
self._client.setup_security_services(security_services,
vserver_client,
vserver_name)
except Exception:
with excutils.save_and_reraise_exception():
LOG.error("Failed to configure Vserver.")
# NOTE(dviroel): At this point, the lock was already acquired
# by the caller of _create_vserver.
self._delete_vserver(vserver_name,
security_services=security_services,
needs_lock=False)
def _get_valid_ipspace_name(self, network_id):
"""Get IPspace name according to network id."""
return 'ipspace_' + network_id.replace('-', '_')
@na_utils.trace
def _create_ipspace(self, network_info):
"""If supported, create an IPspace for a new Vserver."""
if not self._client.features.IPSPACES:
return None
if (network_info['network_allocations'][0]['network_type']
not in SEGMENTED_NETWORK_TYPES):
return client_cmode.DEFAULT_IPSPACE
# NOTE(cknight): Neutron needs cDOT IP spaces because it can provide
# overlapping IP address ranges for different subnets. That is not
# believed to be an issue for any of Manila's other network plugins.
ipspace_id = network_info.get('neutron_subnet_id')
if not ipspace_id:
return client_cmode.DEFAULT_IPSPACE
ipspace_name = self._get_valid_ipspace_name(ipspace_id)
self._client.create_ipspace(ipspace_name)
return ipspace_name
@na_utils.trace
def _create_vserver_lifs(self, vserver_name, vserver_client, network_info,
ipspace_name):
"""Create Vserver data logical interfaces (LIFs)."""
nodes = self._client.list_cluster_nodes()
node_network_info = zip(nodes, network_info['network_allocations'])
for node_name, network_allocation in node_network_info:
lif_name = self._get_lif_name(node_name, network_allocation)
self._create_lif(vserver_client, vserver_name, ipspace_name,
node_name, lif_name, network_allocation)
@na_utils.trace
def _create_vserver_admin_lif(self, vserver_name, vserver_client,
network_info, ipspace_name):
"""Create Vserver admin LIF, if defined."""
network_allocations = network_info.get('admin_network_allocations')
if not network_allocations:
LOG.info('No admin network defined for Vserver %s.',
vserver_name)
return
node_name = self._client.list_cluster_nodes()[0]
network_allocation = network_allocations[0]
lif_name = self._get_lif_name(node_name, network_allocation)
self._create_lif(vserver_client, vserver_name, ipspace_name,
node_name, lif_name, network_allocation)
@na_utils.trace
def _create_vserver_routes(self, vserver_client, network_info):
"""Create Vserver route and set gateways."""
route_gateways = []
# NOTE(gouthamr): Use the gateway from the tenant subnet/s
# for the static routes. Do not configure a route for the admin
# subnet because fast path routing will work for incoming
# connections and there are no requirements for outgoing
# connections on the admin network yet.
for net_allocation in (network_info['network_allocations']):
if net_allocation['gateway'] not in route_gateways:
vserver_client.create_route(net_allocation['gateway'])
route_gateways.append(net_allocation['gateway'])
@na_utils.trace
def _get_node_data_port(self, node):
port_names = self._client.list_node_data_ports(node)
pattern = self.configuration.netapp_port_name_search_pattern
matched_port_names = [port_name for port_name in port_names
if re.match(pattern, port_name)]
if not matched_port_names:
raise exception.NetAppException(
_('Could not find eligible network ports on node %s on which '
'to create Vserver LIFs.') % node)
return matched_port_names[0]
def _get_lif_name(self, node_name, network_allocation):
"""Get LIF name based on template from manila.conf file."""
lif_name_args = {
'node': node_name,
'net_allocation_id': network_allocation['id'],
}
return self.configuration.netapp_lif_name_template % lif_name_args
@na_utils.trace
def _create_lif(self, vserver_client, vserver_name, ipspace_name,
node_name, lif_name, network_allocation):
"""Creates LIF for Vserver."""
port = self._get_node_data_port(node_name)
ip_address = network_allocation['ip_address']
netmask = utils.cidr_to_netmask(network_allocation['cidr'])
vlan = network_allocation['segmentation_id']
network_mtu = network_allocation.get('mtu')
mtu = network_mtu or DEFAULT_MTU
if not vserver_client.network_interface_exists(
vserver_name, node_name, port, ip_address, netmask, vlan):
self._client.create_network_interface(
ip_address, netmask, vlan, node_name, port, vserver_name,
lif_name, ipspace_name, mtu)
@na_utils.trace
def get_network_allocations_number(self):
"""Get number of network interfaces to be created."""
return len(self._client.list_cluster_nodes())
@na_utils.trace
def get_admin_network_allocations_number(self, admin_network_api):
"""Get number of network allocations for creating admin LIFs."""
return 1 if admin_network_api else 0
@na_utils.trace
def teardown_server(self, server_details, security_services=None):
"""Teardown share server."""
vserver = server_details.get(
'vserver_name') if server_details else None
if not vserver:
LOG.warning("Vserver not specified for share server being "
"deleted. Deletion of share server record will "
"proceed anyway.")
return
elif not self._client.vserver_exists(vserver):
LOG.warning("Could not find Vserver for share server being "
"deleted: %s. Deletion of share server "
"record will proceed anyway.", vserver)
return
self._delete_vserver(vserver, security_services=security_services)
@na_utils.trace
def _delete_vserver(self, vserver, security_services=None,
needs_lock=True):
"""Delete a Vserver plus IPspace and security services as needed."""
ipspace_name = self._client.get_vserver_ipspace(vserver)
vserver_client = self._get_api_client(vserver=vserver)
network_interfaces = vserver_client.get_network_interfaces()
interfaces_on_vlans = []
vlans = []
for interface in network_interfaces:
if '-' in interface['home-port']:
interfaces_on_vlans.append(interface)
vlans.append(interface['home-port'])
if vlans:
vlans = '-'.join(sorted(set(vlans))) if vlans else None
vlan_id = vlans.split('-')[-1]
else:
vlan_id = None
def _delete_vserver_without_lock():
# NOTE(dviroel): Attempt to delete all vserver peering
# created by replication
self._delete_vserver_peers(vserver)
self._client.delete_vserver(vserver,
vserver_client,
security_services=security_services)
if ipspace_name and not self._client.ipspace_has_data_vservers(
ipspace_name):
self._client.delete_ipspace(ipspace_name)
self._delete_vserver_vlans(interfaces_on_vlans)
@utils.synchronized('netapp-VLAN-%s' % vlan_id, external=True)
def _delete_vserver_with_lock():
_delete_vserver_without_lock()
if needs_lock:
return _delete_vserver_with_lock()
else:
return _delete_vserver_without_lock()
@na_utils.trace
def _delete_vserver_vlans(self, network_interfaces_on_vlans):
"""Delete Vserver's VLAN configuration from ports"""
for interface in network_interfaces_on_vlans:
try:
home_port = interface['home-port']
port, vlan = home_port.split('-')
node = interface['home-node']
self._client.delete_vlan(node, port, vlan)
except exception.NetAppException:
LOG.exception("Deleting Vserver VLAN failed.")
@na_utils.trace
def _delete_vserver_peers(self, vserver):
vserver_peers = self._get_vserver_peers(vserver=vserver)
for peer in vserver_peers:
self._delete_vserver_peer(peer.get('vserver'),
peer.get('peer-vserver'))
def get_configured_ip_versions(self):
versions = [4]
options = self._client.get_net_options()
if options['ipv6-enabled']:
versions.append(6)
return versions
@na_utils.trace
def create_replica(self, context, replica_list, new_replica,
access_rules, share_snapshots, share_server=None):
"""Creates the new replica on this backend and sets up SnapMirror.
It creates the peering between the associated vservers before creating
the share replica and setting up the SnapMirror.
"""
# 1. Retrieve source and destination vservers from both replicas,
# active and and new_replica
src_vserver, dst_vserver = self._get_vservers_from_replicas(
context, replica_list, new_replica)
# 2. Retrieve the active replica host's client and cluster name
src_replica = self.find_active_replica(replica_list)
src_replica_host = share_utils.extract_host(
src_replica['host'], level='backend_name')
src_replica_client = data_motion.get_client_for_backend(
src_replica_host, vserver_name=src_vserver)
# Cluster name is needed for setting up the vserver peering
src_replica_cluster_name = src_replica_client.get_cluster_name()
# 3. Retrieve new replica host's client
new_replica_host = share_utils.extract_host(
new_replica['host'], level='backend_name')
new_replica_client = data_motion.get_client_for_backend(
new_replica_host, vserver_name=dst_vserver)
new_replica_cluster_name = new_replica_client.get_cluster_name()
if (dst_vserver != src_vserver
and not self._get_vserver_peers(dst_vserver, src_vserver)):
# 3.1. Request vserver peer creation from new_replica's host
# to active replica's host
new_replica_client.create_vserver_peer(
dst_vserver, src_vserver,
peer_cluster_name=src_replica_cluster_name)
# 3.2. Accepts the vserver peering using active replica host's
# client (inter-cluster only)
if new_replica_cluster_name != src_replica_cluster_name:
src_replica_client.accept_vserver_peer(src_vserver,
dst_vserver)
return (super(NetAppCmodeMultiSVMFileStorageLibrary, self).
create_replica(context, replica_list, new_replica,
access_rules, share_snapshots))
def delete_replica(self, context, replica_list, replica, share_snapshots,
share_server=None):
"""Removes the replica on this backend and destroys SnapMirror.
Removes the replica, destroys the SnapMirror and delete the vserver
peering if needed.
"""
vserver, peer_vserver = self._get_vservers_from_replicas(
context, replica_list, replica)
super(NetAppCmodeMultiSVMFileStorageLibrary, self).delete_replica(
context, replica_list, replica, share_snapshots)
# Check if there are no remaining SnapMirror connections and if a
# vserver peering exists and delete it.
snapmirrors = self._get_snapmirrors(vserver, peer_vserver)
snapmirrors_from_peer = self._get_snapmirrors(peer_vserver, vserver)
peers = self._get_vserver_peers(peer_vserver, vserver)
if not (snapmirrors or snapmirrors_from_peer) and peers:
self._delete_vserver_peer(peer_vserver, vserver)
def manage_server(self, context, share_server, identifier, driver_options):
"""Manages a vserver by renaming it and returning backend_details."""
new_vserver_name = self._get_vserver_name(share_server['id'])
old_vserver_name = self._get_correct_vserver_old_name(identifier)
if new_vserver_name != old_vserver_name:
self._client.rename_vserver(old_vserver_name, new_vserver_name)
backend_details = {'vserver_name': new_vserver_name}
return new_vserver_name, backend_details
def unmanage_server(self, server_details, security_services=None):
pass
def get_share_server_network_info(
self, context, share_server, identifier, driver_options):
"""Returns a list of IPs for each vserver network interface."""
vserver_name = self._get_correct_vserver_old_name(identifier)
vserver, vserver_client = self._get_vserver(vserver_name=vserver_name)
interfaces = vserver_client.get_network_interfaces()
allocations = []
for lif in interfaces:
allocations.append(lif['address'])
return allocations
def _get_correct_vserver_old_name(self, identifier):
# In case vserver_name includes the template, we check and add it here
if not self._client.vserver_exists(identifier):
return self._get_vserver_name(identifier)
return identifier
def _get_snapmirrors(self, vserver, peer_vserver):
return self._client.get_snapmirrors(
source_vserver=vserver, source_volume=None,
destination_vserver=peer_vserver, destination_volume=None)
def _get_vservers_from_replicas(self, context, replica_list, new_replica):
active_replica = self.find_active_replica(replica_list)
dm_session = data_motion.DataMotionSession()
vserver = dm_session.get_vserver_from_share(active_replica)
peer_vserver = dm_session.get_vserver_from_share(new_replica)
return vserver, peer_vserver
def _get_vserver_peers(self, vserver=None, peer_vserver=None):
return self._client.get_vserver_peers(vserver, peer_vserver)
def _create_vserver_peer(self, context, vserver, peer_vserver):
self._client.create_vserver_peer(vserver, peer_vserver)
def _delete_vserver_peer(self, vserver, peer_vserver):
self._client.delete_vserver_peer(vserver, peer_vserver)
def create_share_from_snapshot(self, context, share, snapshot,
share_server=None, parent_share=None):
# NOTE(dviroel): If both parent and child shares are in the same host,
# they belong to the same cluster, and we can skip all the processing
# below.
if parent_share['host'] != share['host']:
# 1. Retrieve source and destination vservers from source and
# destination shares
new_share = copy.deepcopy(share.to_dict())
new_share['share_server'] = share_server.to_dict()
dm_session = data_motion.DataMotionSession()
src_vserver = dm_session.get_vserver_from_share(parent_share)
dest_vserver = dm_session.get_vserver_from_share(new_share)
# 2. Retrieve the source share host's client and cluster name
src_share_host = share_utils.extract_host(
parent_share['host'], level='backend_name')
src_share_client = data_motion.get_client_for_backend(
src_share_host, vserver_name=src_vserver)
# Cluster name is needed for setting up the vserver peering
src_share_cluster_name = src_share_client.get_cluster_name()
# 3. Retrieve new share host's client
dest_share_host = share_utils.extract_host(
new_share['host'], level='backend_name')
dest_share_client = data_motion.get_client_for_backend(
dest_share_host, vserver_name=dest_vserver)
dest_share_cluster_name = dest_share_client.get_cluster_name()
# If source and destination shares are placed in a different
# clusters, we'll need the both vserver peered.
if src_share_cluster_name != dest_share_cluster_name:
if not self._get_vserver_peers(dest_vserver, src_vserver):
# 3.1. Request vserver peer creation from new_replica's
# host to active replica's host
dest_share_client.create_vserver_peer(
dest_vserver, src_vserver,
peer_cluster_name=src_share_cluster_name)
# 3.2. Accepts the vserver peering using active replica
# host's client
src_share_client.accept_vserver_peer(src_vserver,
dest_vserver)
return (super(NetAppCmodeMultiSVMFileStorageLibrary, self)
.create_share_from_snapshot(
context, share, snapshot, share_server=share_server,
parent_share=parent_share))