Browse Source

Implement OpenStack Cinder driver for Vitastor

It can't delete snapshots yet because Vitastor layer merge isn't
implemented yet. You can only delete volumes with all snapshots.
This will be fixed in the near future.
pull/6/head
Vitaliy Filippov 3 months ago
parent
commit
e90bbe6385
  1. 948
      patches/cinder-vitastor.py
  2. 23
      patches/devstack-local.conf
  3. 287
      patches/nova-20.diff

948
patches/cinder-vitastor.py

@ -0,0 +1,948 @@
# Vitastor Driver for OpenStack Cinder
#
# --------------------------------------------
# Install as cinder/volume/drivers/vitastor.py
# --------------------------------------------
#
# Copyright 2020 Vitaliy Filippov
#
# 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.
"""Cinder Vitastor Driver"""
import binascii
import base64
import errno
import json
import math
import os
import tempfile
from castellan import key_manager
from oslo_config import cfg
from oslo_log import log as logging
from oslo_service import loopingcall
from oslo_concurrency import processutils
from oslo_utils import encodeutils
from oslo_utils import excutils
from oslo_utils import fileutils
from oslo_utils import units
import six
from six.moves.urllib import request
from cinder import exception
from cinder.i18n import _
from cinder.image import image_utils
from cinder import interface
from cinder import objects
from cinder.objects import fields
from cinder import utils
from cinder.volume import configuration
from cinder.volume import driver
from cinder.volume import volume_utils
VERSION = '0.6.4'
LOG = logging.getLogger(__name__)
VITASTOR_OPTS = [
cfg.StrOpt(
'vitastor_config_path',
default='/etc/vitastor/vitastor.conf',
help='Vitastor configuration file path'
),
cfg.StrOpt(
'vitastor_etcd_address',
default='',
help='Vitastor etcd address(es)'),
cfg.StrOpt(
'vitastor_etcd_prefix',
default='/vitastor',
help='Vitastor etcd prefix'
),
cfg.StrOpt(
'vitastor_pool_id',
default='',
help='Vitastor pool ID to use for volumes'
),
# FIXME exclusive_cinder_pool ?
]
CONF = cfg.CONF
CONF.register_opts(VITASTOR_OPTS, group = configuration.SHARED_CONF_GROUP)
class VitastorDriverException(exception.VolumeDriverException):
message = _("Vitastor Cinder driver failure: %(reason)s")
@interface.volumedriver
class VitastorDriver(driver.CloneableImageVD,
driver.ManageableVD, driver.ManageableSnapshotsVD,
driver.BaseVD):
"""Implements Vitastor volume commands."""
cfg = {}
_etcd_urls = []
def __init__(self, active_backend_id = None, *args, **kwargs):
super(VitastorDriver, self).__init__(*args, **kwargs)
self.configuration.append_config_values(VITASTOR_OPTS)
@classmethod
def get_driver_options(cls):
additional_opts = cls._get_oslo_driver_opts(
'reserved_percentage',
'max_over_subscription_ratio',
'volume_dd_blocksize'
)
return VITASTOR_OPTS + additional_opts
def do_setup(self, context):
"""Performs initialization steps that could raise exceptions."""
super(VitastorDriver, self).do_setup(context)
# Make sure configuration is in UTF-8
for attr in [ 'config_path', 'etcd_address', 'etcd_prefix', 'pool_id' ]:
val = self.configuration.safe_get('vitastor_'+attr)
if val is not None:
self.cfg[attr] = utils.convert_str(val)
self.cfg = self._load_config(self.cfg)
def _load_config(self, cfg):
# Try to load configuration file
try:
f = open(cfg['config_path'] or '/etc/vitastor/vitastor.conf')
conf = json.loads(f.read())
f.close()
for k in conf:
cfg[k] = cfg.get(k, conf[k])
except:
pass
if isinstance(cfg['etcd_address'], str):
cfg['etcd_address'] = cfg['etcd_address'].split(',')
# Sanitize etcd URLs
for i, etcd_url in enumerate(cfg['etcd_address']):
ssl = False
if etcd_url.lower().startswith('http://'):
etcd_url = etcd_url[7:]
elif etcd_url.lower().startswith('https://'):
etcd_url = etcd_url[8:]
ssl = True
if etcd_url.find('/') < 0:
etcd_url += '/v3'
if ssl:
etcd_url = 'https://'+etcd_url
else:
etcd_url = 'http://'+etcd_url
cfg['etcd_address'][i] = etcd_url
return cfg
def check_for_setup_error(self):
"""Returns an error if prerequisites aren't met."""
def _encode_etcd_key(self, key):
if not isinstance(key, bytes):
key = str(key).encode('utf-8')
return base64.b64encode(self.cfg['etcd_prefix'].encode('utf-8')+b'/'+key).decode('utf-8')
def _encode_etcd_value(self, value):
if not isinstance(value, bytes):
value = str(value).encode('utf-8')
return base64.b64encode(value).decode('utf-8')
def _encode_etcd_requests(self, obj):
for v in obj:
for rt in v:
if 'key' in v[rt]:
v[rt]['key'] = self._encode_etcd_key(v[rt]['key'])
if 'range_end' in v[rt]:
v[rt]['range_end'] = self._encode_etcd_key(v[rt]['range_end'])
if 'value' in v[rt]:
v[rt]['value'] = self._encode_etcd_value(v[rt]['value'])
def _etcd_txn(self, params):
if 'compare' in params:
for v in params['compare']:
if 'key' in v:
v['key'] = self._encode_etcd_key(v['key'])
if 'failure' in params:
self._encode_etcd_requests(params['failure'])
if 'success' in params:
self._encode_etcd_requests(params['success'])
body = json.dumps(params).encode('utf-8')
headers = {
'Content-Type': 'application/json'
}
err = None
for etcd_url in self.cfg['etcd_address']:
try:
resp = request.urlopen(request.Request(etcd_url+'/kv/txn', body, headers), timeout = 5)
data = json.loads(resp.read())
if 'responses' not in data:
data['responses'] = []
for i, resp in enumerate(data['responses']):
if 'response_range' in resp:
if 'kvs' not in resp['response_range']:
resp['response_range']['kvs'] = []
for kv in resp['response_range']['kvs']:
kv['key'] = base64.b64decode(kv['key'].encode('utf-8')).decode('utf-8')
if kv['key'].startswith(self.cfg['etcd_prefix']+'/'):
kv['key'] = kv['key'][len(self.cfg['etcd_prefix'])+1 : ]
kv['value'] = json.loads(base64.b64decode(kv['value'].encode('utf-8')))
if len(resp.keys()) != 1:
LOG.exception('unknown responses['+str(i)+'] format: '+json.dumps(resp))
else:
resp = data['responses'][i] = resp[list(resp.keys())[0]]
return data
except Exception as e:
LOG.exception('error calling etcd transaction: '+body.decode('utf-8')+'\nerror: '+str(e))
err = e
raise err
def _etcd_foreach(self, prefix, add_fn):
total = 0
batch = 1000
begin = prefix+'/'
while True:
resp = self._etcd_txn({ 'success': [
{ 'request_range': {
'key': begin,
'range_end': prefix+'0',
'limit': batch+1,
} },
] })
i = 0
while i < batch and i < len(resp['responses'][0]['kvs']):
kv = resp['responses'][0]['kvs'][i]
add_fn(kv)
i += 1
if len(resp['responses'][0]['kvs']) <= batch:
break
begin = resp['responses'][0]['kvs'][batch]['key']
return total
def _update_volume_stats(self):
location_info = json.dumps({
'config': self.configuration.vitastor_config_path,
'etcd_address': self.configuration.vitastor_etcd_address,
'etcd_prefix': self.configuration.vitastor_etcd_prefix,
'pool_id': self.configuration.vitastor_pool_id,
})
stats = {
'vendor_name': 'Vitastor',
'driver_version': self.VERSION,
'storage_protocol': 'vitastor',
'total_capacity_gb': 'unknown',
'free_capacity_gb': 'unknown',
# FIXME check if safe_get is required
'reserved_percentage': self.configuration.safe_get('reserved_percentage'),
'multiattach': True,
'thin_provisioning_support': True,
'max_over_subscription_ratio': self.configuration.safe_get('max_over_subscription_ratio'),
'location_info': location_info,
'backend_state': 'down',
'volume_backend_name': self.configuration.safe_get('volume_backend_name') or 'vitastor',
'replication_enabled': False,
}
try:
pool_stats = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'pool/stats/'+str(self.cfg['pool_id']) } }
] })
total_provisioned = 0
def add_total(kv):
nonlocal total_provisioned
if kv['key'].find('@') >= 0:
total_provisioned += kv['value']['size']
self._etcd_foreach('config/inode/'+str(self.cfg['pool_id']), lambda kv: add_total(kv))
stats['provisioned_capacity_gb'] = round(total_provisioned/1024.0/1024.0/1024.0, 2)
pool_stats = pool_stats['responses'][0]['kvs']
if len(pool_stats):
pool_stats = pool_stats[0]
stats['free_capacity_gb'] = round(1024.0*(pool_stats['total_raw_tb']-pool_stats['used_raw_tb'])/pool_stats['raw_to_usable'], 2)
stats['total_capacity_gb'] = round(1024.0*pool_stats['total_raw_tb'], 2)
stats['backend_state'] = 'up'
except Exception as e:
# just log and return unknown capacities
LOG.exception('error getting vitastor pool stats: '+str(e))
self._stats = stats
def _next_id(self, resp):
if len(resp['kvs']) == 0:
return (1, 0)
else:
return (1 + resp['kvs'][0]['value'], resp['kvs'][0]['mod_revision'])
def create_volume(self, volume):
"""Creates a logical volume."""
size = int(volume.size) * units.Gi
# FIXME: Check if convert_str is really required
vol_name = utils.convert_str(volume.name)
if vol_name.find('@') >= 0 or vol_name.find('/') >= 0:
raise exception.VolumeBackendAPIException(data = '@ and / are forbidden in volume and snapshot names')
LOG.debug("creating volume '%s'", vol_name)
self._create_image(vol_name, { 'size': size })
if volume.encryption_key_id:
self._create_encrypted_volume(volume, volume.obj_context)
volume_update = {}
return volume_update
def _create_encrypted_volume(self, volume, context):
"""Create a new LUKS encrypted image directly in Vitastor."""
vol_name = utils.convert_str(volume.name)
f, opts = self._encrypt_opts(volume, context)
# FIXME: Check if it works at all :-)
self._execute(
'qemu-img', 'convert', '-f', 'luks', *opts,
'vitastor:image='+vol_name.replace(':', '\\:')+self._qemu_args(),
'%sM' % (volume.size * 1024)
)
f.close()
def _encrypt_opts(self, volume, context):
encryption = volume_utils.check_encryption_provider(self.db, volume, context)
# Fetch the key associated with the volume and decode the passphrase
keymgr = key_manager.API(CONF)
key = keymgr.get(context, encryption['encryption_key_id'])
passphrase = binascii.hexlify(key.get_encoded()).decode('utf-8')
# Decode the dm-crypt style cipher spec into something qemu-img can use
cipher_spec = image_utils.decode_cipher(encryption['cipher'], encryption['key_size'])
tmp_dir = volume_utils.image_conversion_dir()
f = tempfile.NamedTemporaryFile(prefix = 'luks_', dir = tmp_dir)
f.write(passphrase)
f.flush()
return (f, [
'--object', 'secret,id=luks_sec,format=raw,file=%(passfile)s' % {'passfile': f.name},
'-o', 'key-secret=luks_sec,cipher-alg=%(cipher_alg)s,cipher-mode=%(cipher_mode)s,ivgen-alg=%(ivgen_alg)s' % cipher_spec,
])
def create_snapshot(self, snapshot):
"""Creates a volume snapshot."""
vol_name = utils.convert_str(snapshot.volume_name)
snap_name = utils.convert_str(snapshot.name)
if snap_name.find('@') >= 0 or snap_name.find('/') >= 0:
raise exception.VolumeBackendAPIException(data = '@ and / are forbidden in volume and snapshot names')
self._create_snapshot(vol_name, vol_name+'@'+snap_name)
def snapshot_revert_use_temp_snapshot(self):
"""Disable the use of a temporary snapshot on revert."""
return False
def revert_to_snapshot(self, context, volume, snapshot):
"""Revert a volume to a given snapshot."""
# FIXME Delete the image, then recreate it from the snapshot
def delete_snapshot(self, snapshot):
"""Deletes a snapshot."""
vol_name = utils.convert_str(snapshot.volume_name)
snap_name = utils.convert_str(snapshot.name)
# Find the snapshot
resp = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'index/image/'+vol_name+'@'+snap_name } },
] })
if len(resp['responses'][0]['kvs']) == 0:
raise exception.SnapshotNotFound(snapshot_id = snap_name)
inode_id = int(resp['responses'][0]['kvs'][0]['value']['id'])
pool_id = int(resp['responses'][0]['kvs'][0]['value']['pool_id'])
parents = {}
parents[(pool_id << 48) | (inode_id & 0xffffffffffff)] = True
# Check if there are child volumes
children = self._child_count(parents)
if children > 0:
raise exception.SnapshotIsBusy(snapshot_name = snap_name)
# FIXME: We can't delete snapshots because we can't merge layers yet
raise exception.VolumeBackendAPIException(data = 'Snapshot delete (layer merge) is not implemented yet')
def _child_count(self, parents):
children = 0
def add_child(kv):
nonlocal children
children += self._check_parent(kv, parents)
self._etcd_foreach('config/inode', lambda kv: add_child(kv))
return children
def _check_parent(self, kv, parents):
if 'parent_id' not in kv['value']:
return 0
parent_id = kv['value']['parent_id']
_, _, pool_id, inode_id = kv['key'].split('/')
parent_pool_id = pool_id
if 'parent_pool_id' in kv['value'] and kv['value']['parent_pool_id']:
parent_pool_id = kv['value']['parent_pool_id']
inode = (int(pool_id) << 48) | (int(inode_id) & 0xffffffffffff)
parent = (int(parent_pool_id) << 48) | (int(parent_id) & 0xffffffffffff)
if parent in parents and inode not in parents:
return 1
return 0
def create_cloned_volume(self, volume, src_vref):
"""Create a cloned volume from another volume."""
size = int(volume.size) * units.Gi
src_name = utils.convert_str(src_vref.name)
dest_name = utils.convert_str(volume.name)
if dest_name.find('@') >= 0 or dest_name.find('/') >= 0:
raise exception.VolumeBackendAPIException(data = '@ and / are forbidden in volume and snapshot names')
# FIXME Do full copy if requested (cfg.disable_clone)
if src_vref.admin_metadata.get('readonly') == 'True':
# source volume is a volume-image cache entry or other readonly volume
# clone without intermediate snapshot
src = self._get_image(src_name)
LOG.debug("creating image '%s' from '%s'", dest_name, src_name)
new_cfg = self._create_image(dest_name, {
'size': size,
'parent_id': src['idx']['id'],
'parent_pool_id': src['idx']['pool_id'],
})
return {}
clone_snap = "%s@%s.clone_snap" % (src_name, dest_name)
make_img = True
if (volume.display_name and
volume.display_name.startswith('image-') and
src_vref.project_id != volume.project_id):
# idiotic openstack creates image-volume cache entries
# as clones of normal VM volumes... :-X prevent it :-D
clone_snap = dest_name
make_img = False
LOG.debug("creating layer '%s' under '%s'", clone_snap, src_name)
new_cfg = self._create_snapshot(src_name, clone_snap, True)
if make_img:
# Then create a clone from it
new_cfg = self._create_image(dest_name, {
'size': size,
'parent_id': new_cfg['parent_id'],
'parent_pool_id': new_cfg['parent_pool_id'],
})
return {}
def create_volume_from_snapshot(self, volume, snapshot):
"""Creates a cloned volume from an existing snapshot."""
vol_name = utils.convert_str(volume.name)
snap_name = utils.convert_str(snapshot.name)
snap = self._get_image(vol_name+'@'+snap_name)
if not snap:
raise exception.SnapshotNotFound(snapshot_id = snap_name)
snap_inode_id = int(resp['responses'][0]['kvs'][0]['value']['id'])
snap_pool_id = int(resp['responses'][0]['kvs'][0]['value']['pool_id'])
size = snap['cfg']['size']
if int(volume.size):
size = int(volume.size) * units.Gi
new_cfg = self._create_image(vol_name, {
'size': size,
'parent_id': snap['idx']['id'],
'parent_pool_id': snap['idx']['pool_id'],
})
return {}
def _vitastor_args(self):
args = []
for k in [ 'config_path', 'etcd_address', 'etcd_prefix' ]:
v = self.configuration.safe_get('vitastor_'+k)
if v:
args.extend(['--'+k, v])
return args
def _qemu_args(self):
args = ''
for k in [ 'config_path', 'etcd_address', 'etcd_prefix' ]:
v = self.configuration.safe_get('vitastor_'+k)
kk = k
if kk == 'etcd_address':
# FIXME use etcd_address in qemu driver
kk = 'etcd_host'
if v:
args += ':'+kk+'='+v.replace(':', '\\:')
return args
def delete_volume(self, volume):
"""Deletes a logical volume."""
vol_name = utils.convert_str(volume.name)
# Find the volume and all its snapshots
range_end = b'index/image/' + vol_name.encode('utf-8')
range_end = range_end[0 : len(range_end)-1] + six.int2byte(range_end[len(range_end)-1] + 1)
resp = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'index/image/'+vol_name, 'range_end': range_end } },
] })
if len(resp['responses'][0]['kvs']) == 0:
# already deleted
LOG.info("volume %s no longer exists in backend", vol_name)
return
layers = resp['responses'][0]['kvs']
layer_ids = {}
for kv in layers:
inode_id = int(kv['value']['id'])
pool_id = int(kv['value']['pool_id'])
inode_pool_id = (pool_id << 48) | (inode_id & 0xffffffffffff)
layer_ids[inode_pool_id] = True
# Check if the volume has clones and raise 'busy' if so
children = self._child_count(layer_ids)
if children > 0:
raise exception.VolumeIsBusy(volume_name = vol_name)
# Clear data
for kv in layers:
args = [
'vitastor-rm', '--pool', str(kv['value']['pool_id']),
'--inode', str(kv['value']['id']), '--progress', '0',
*(self._vitastor_args())
]
try:
self._execute(*args)
except processutils.ProcessExecutionError as exc:
LOG.error("Failed to remove layer "+kv['key']+": "+exc)
raise exception.VolumeBackendAPIException(data = exc.stderr)
# Delete all layers from etcd
requests = []
for kv in layers:
requests.append({ 'request_delete_range': { 'key': kv['key'] } })
requests.append({ 'request_delete_range': { 'key': 'config/inode/'+str(kv['value']['pool_id'])+'/'+str(kv['value']['id']) } })
self._etcd_txn({ 'success': requests })
def retype(self, context, volume, new_type, diff, host):
"""Change extra type specifications for a volume."""
# FIXME Maybe (in the future) support multiple pools as different types
return True, {}
def ensure_export(self, context, volume):
"""Synchronously recreates an export for a logical volume."""
pass
def create_export(self, context, volume, connector):
"""Exports the volume."""
pass
def remove_export(self, context, volume):
"""Removes an export for a logical volume."""
pass
def _create_image(self, vol_name, cfg):
pool_s = str(self.cfg['pool_id'])
image_id = 0
while image_id == 0:
# check if the image already exists and find a free ID
resp = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'index/image/'+vol_name } },
{ 'request_range': { 'key': 'index/maxid/'+pool_s } },
] })
if len(resp['responses'][0]['kvs']) > 0:
# already exists
raise exception.VolumeBackendAPIException(data = 'Volume '+vol_name+' already exists')
image_id, id_mod = self._next_id(resp['responses'][1])
# try to create the image
resp = self._etcd_txn({ 'compare': [
{ 'target': 'MOD', 'mod_revision': id_mod, 'key': 'index/maxid/'+pool_s },
{ 'target': 'VERSION', 'version': 0, 'key': 'index/image/'+vol_name },
{ 'target': 'VERSION', 'version': 0, 'key': 'config/inode/'+pool_s+'/'+str(image_id) },
], 'success': [
{ 'request_put': { 'key': 'index/maxid/'+pool_s, 'value': image_id } },
{ 'request_put': { 'key': 'index/image/'+vol_name, 'value': json.dumps({
'id': image_id, 'pool_id': self.cfg['pool_id']
}) } },
{ 'request_put': { 'key': 'config/inode/'+pool_s+'/'+str(image_id), 'value': json.dumps({
**cfg, 'name': vol_name,
}) } },
] })
if not resp.get('succeeded'):
# repeat
image_id = 0
def _create_snapshot(self, vol_name, snap_vol_name, allow_existing = False):
while True:
# check if the image already exists and snapshot doesn't
resp = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'index/image/'+vol_name } },
{ 'request_range': { 'key': 'index/image/'+snap_vol_name } },
] })
if len(resp['responses'][0]['kvs']) == 0:
raise exception.VolumeBackendAPIException(data = 'Volume '+vol_name+' does not exist')
if len(resp['responses'][1]['kvs']) > 0:
if allow_existing:
snap_idx = resp['responses'][1]['kvs'][0]['value']
resp = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'config/inode/'+str(snap_idx['pool_id'])+'/'+str(snap_idx['id']) } },
] })
if len(resp['responses'][0]['kvs']) == 0:
raise exception.VolumeBackendAPIException(data =
'Volume '+snap_vol_name+' is already indexed, but does not exist'
)
return resp['responses'][0]['kvs'][0]['value']
raise exception.VolumeBackendAPIException(
data = 'Volume '+snap_vol_name+' already exists'
)
vol_idx = resp['responses'][0]['kvs'][0]['value']
vol_idx_mod = resp['responses'][0]['kvs'][0]['mod_revision']
# get image inode config and find a new ID
resp = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'config/inode/'+str(vol_idx['pool_id'])+'/'+str(vol_idx['id']) } },
{ 'request_range': { 'key': 'index/maxid/'+str(self.cfg['pool_id']) } },
] })
if len(resp['responses'][0]['kvs']) == 0:
raise exception.VolumeBackendAPIException(data = 'Volume '+vol_name+' does not exist')
vol_cfg = resp['responses'][0]['kvs'][0]['value']
vol_mod = resp['responses'][0]['kvs'][0]['mod_revision']
new_id, id_mod = self._next_id(resp['responses'][1])
# try to redirect image to the new inode
new_cfg = {
**vol_cfg, 'name': vol_name, 'parent_id': vol_idx['id'], 'parent_pool_id': vol_idx['pool_id']
}
resp = self._etcd_txn({ 'compare': [
{ 'target': 'MOD', 'mod_revision': vol_idx_mod, 'key': 'index/image/'+vol_name },
{ 'target': 'MOD', 'mod_revision': vol_mod, 'key': 'config/inode/'+str(vol_idx['pool_id'])+'/'+str(vol_idx['id']) },
{ 'target': 'MOD', 'mod_revision': id_mod, 'key': 'index/maxid/'+str(self.cfg['pool_id']) },
{ 'target': 'VERSION', 'version': 0, 'key': 'index/image/'+snap_vol_name },
{ 'target': 'VERSION', 'version': 0, 'key': 'config/inode/'+str(self.cfg['pool_id'])+'/'+str(new_id) },
], 'success': [
{ 'request_put': { 'key': 'index/maxid/'+str(self.cfg['pool_id']), 'value': new_id } },
{ 'request_put': { 'key': 'index/image/'+vol_name, 'value': json.dumps({
'id': new_id, 'pool_id': self.cfg['pool_id']
}) } },
{ 'request_put': { 'key': 'config/inode/'+str(self.cfg['pool_id'])+'/'+str(new_id), 'value': json.dumps(new_cfg) } },
{ 'request_put': { 'key': 'index/image/'+snap_vol_name, 'value': json.dumps({
'id': vol_idx['id'], 'pool_id': vol_idx['pool_id']
}) } },
{ 'request_put': { 'key': 'config/inode/'+str(vol_idx['pool_id'])+'/'+str(vol_idx['id']), 'value': json.dumps({
**vol_cfg, 'name': snap_vol_name, 'readonly': True
}) } }
] })
if resp.get('succeeded'):
return new_cfg
def initialize_connection(self, volume, connector):
data = {
'driver_volume_type': 'vitastor',
'data': {
'config_path': self.configuration.vitastor_config_path,
'etcd_address': self.configuration.vitastor_etcd_address,
'etcd_prefix': self.configuration.vitastor_etcd_prefix,
'name': volume.name,
'logical_block_size': 512,
'physical_block_size': 4096,
}
}
LOG.debug('connection data: %s', data)
return data
def terminate_connection(self, volume, connector, **kwargs):
pass
def clone_image(self, context, volume, image_location, image_meta, image_service):
if image_location:
# Note: image_location[0] is glance image direct_url.
# image_location[1] contains the list of all locations (including
# direct_url) or None if show_multiple_locations is False in
# glance configuration.
if image_location[1]:
url_locations = [location['url'] for location in image_location[1]]
else:
url_locations = [image_location[0]]
# iterate all locations to look for a cloneable one.
for url_location in url_locations:
if url_location and url_location.startswith('cinder://'):
# The idea is to use cinder://<volume-id> Glance volumes as base images
base_vol = self.db.volume_get(context, url_location[len('cinder://') : ])
if not base_vol or base_vol.volume_type_id != volume.volume_type_id:
continue
size = int(volume.size) * units.Gi
dest_name = utils.convert_str(volume.name)
# Find or create the base snapshot
snap_cfg = self._create_snapshot(base_vol.name, base_vol.name+'@.clone_snap', True)
# Then create a clone from it
new_cfg = self._create_image(dest_name, {
'size': size,
'parent_id': snap_cfg['parent_id'],
'parent_pool_id': snap_cfg['parent_pool_id'],
})
return ({}, True)
return ({}, False)
def copy_image_to_encrypted_volume(self, context, volume, image_service, image_id):
self.copy_image_to_volume(context, volume, image_service, image_id, encrypted = True)
def copy_image_to_volume(self, context, volume, image_service, image_id, encrypted = False):
tmp_dir = volume_utils.image_conversion_dir()
with tempfile.NamedTemporaryFile(dir = tmp_dir) as tmp:
image_utils.fetch_to_raw(
context, image_service, image_id, tmp.name,
self.configuration.volume_dd_blocksize, size = volume.size
)
out_format = [ '-O', 'raw' ]
if encrypted:
key_file, opts = self._encrypt_opts(volume, context)
out_format = [ '-O', 'luks', *opts ]
dest_name = utils.convert_str(volume.name)
self._try_execute(
'qemu-img', 'convert', '-f', 'raw', tmp.name, *out_format,
'vitastor:image='+dest_name.replace(':', '\\:')+self._qemu_args()
)
if encrypted:
key_file.close()
def copy_volume_to_image(self, context, volume, image_service, image_meta):
tmp_dir = volume_utils.image_conversion_dir()
tmp_file = os.path.join(tmp_dir, volume.name + '-' + image_meta['id'])
with fileutils.remove_path_on_error(tmp_file):
vol_name = utils.convert_str(volume.name)
self._try_execute(
'qemu-img', 'convert', '-f', 'raw',
'vitastor:image='+vol_name.replace(':', '\\:')+self._qemu_args(),
'-O', 'raw', tmp_file
)
# FIXME: Copy directly if the destination image is also in Vitastor
volume_utils.upload_volume(context, image_service, image_meta, tmp_file, volume)
os.unlink(tmp_file)
def _get_image(self, vol_name):
# find the image
resp = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'index/image/'+vol_name } },
] })
if len(resp['responses'][0]['kvs']) == 0:
return None
vol_idx = resp['responses'][0]['kvs'][0]['value']
vol_idx_mod = resp['responses'][0]['kvs'][0]['mod_revision']
# get image inode config
resp = self._etcd_txn({ 'success': [
{ 'request_range': { 'key': 'config/inode/'+str(vol_idx['pool_id'])+'/'+str(vol_idx['id']) } },
] })
if len(resp['responses'][0]['kvs']) == 0:
return None
vol_cfg = resp['responses'][0]['kvs'][0]['value']
vol_cfg_mod = resp['responses'][0]['kvs'][0]['mod_revision']
return {
'cfg': vol_cfg,
'cfg_mod': vol_cfg_mod,
'idx': vol_idx,
'idx_mod': vol_idx_mod,
}
def extend_volume(self, volume, new_size):
"""Extend an existing volume."""
vol_name = utils.convert_str(volume.name)
while True:
vol = self._get_image(vol_name)
if not vol:
raise exception.VolumeBackendAPIException(data = 'Volume '+vol_name+' does not exist')
# change size
size = int(new_size) * units.Gi
if size == vol['cfg']['size']:
break
resp = self._etcd_txn({ 'compare': [ {
'target': 'MOD',
'mod_revision': vol['cfg_mod'],
'key': 'config/inode/'+str(vol['idx']['pool_id'])+'/'+str(vol['idx']['id']),
} ], 'success': [
{ 'request_put': {
'key': 'config/inode/'+str(vol['idx']['pool_id'])+'/'+str(vol['idx']['id']),
'value': json.dumps({ **vol['cfg'], 'size': size }),
} },
] })
if resp.get('succeeded'):
break
LOG.debug(
"Extend volume from %(old_size)s GB to %(new_size)s GB.",
{'old_size': volume.size, 'new_size': new_size}
)
def _add_manageable_volume(self, kv, manageable_volumes, cinder_ids):
cfg = kv['value']
if kv['key'].find('@') >= 0:
# snapshot
return
image_id = volume_utils.extract_id_from_volume_name(cfg['name'])
image_info = {
'reference': {'source-name': image_name},
'size': int(math.ceil(float(cfg['size']) / units.Gi)),
'cinder_id': None,
'extra_info': None,
}
if image_id in cinder_ids:
image_info['cinder_id'] = image_id
image_info['safe_to_manage'] = False
image_info['reason_not_safe'] = 'already managed'
else:
image_info['safe_to_manage'] = True
image_info['reason_not_safe'] = None
manageable_volumes.append(image_info)
def get_manageable_volumes(self, cinder_volumes, marker, limit, offset, sort_keys, sort_dirs):
manageable_volumes = []
cinder_ids = [resource['id'] for resource in cinder_volumes]
# List all volumes
# FIXME: It's possible to use pagination in our case, but.. do we want it?
self._etcd_foreach('config/inode/'+str(self.cfg['pool_id']),
lambda kv: self._add_manageable_volume(kv, manageable_volumes, cinder_ids))
return volume_utils.paginate_entries_list(
manageable_volumes, marker, limit, offset, sort_keys, sort_dirs)
def _get_existing_name(existing_ref):
if not isinstance(existing_ref, dict):
existing_ref = {"source-name": existing_ref}
if 'source-name' not in existing_ref:
reason = _('Reference must contain source-name element.')
raise exception.ManageExistingInvalidReference(existing_ref=existing_ref, reason=reason)
src_name = utils.convert_str(existing_ref['source-name'])
if not src_name:
reason = _('Reference must contain source-name element.')
raise exception.ManageExistingInvalidReference(existing_ref=existing_ref, reason=reason)
return src_name
def manage_existing_get_size(self, volume, existing_ref):
"""Return size of an existing image for manage_existing.
:param volume: volume ref info to be set
:param existing_ref: {'source-name': <image name>}
"""
src_name = self._get_existing_name(existing_ref)
vol = self._get_image(src_name)
if not vol:
raise exception.VolumeBackendAPIException(data = 'Volume '+src_name+' does not exist')
return int(math.ceil(float(vol['cfg']['size']) / units.Gi))
def manage_existing(self, volume, existing_ref):
"""Manages an existing image.
Renames the image name to match the expected name for the volume.
:param volume: volume ref info to be set
:param existing_ref: {'source-name': <image name>}
"""
from_name = self._get_existing_name(existing_ref)
to_name = utils.convert_str(volume.name)
self._rename(from_name, to_name)
def _rename(self, from_name, to_name):
while True:
vol = self._get_image(from_name)
if not vol:
raise exception.VolumeBackendAPIException(data = 'Volume '+from_name+' does not exist')
to = self._get_image(to_name)
if to:
raise exception.VolumeBackendAPIException(data = 'Volume '+to_name+' already exists')
resp = self._etcd_txn({ 'compare': [
{ 'target': 'MOD', 'mod_revision': vol['idx_mod'], 'key': 'index/image/'+vol['cfg']['name'] },
{ 'target': 'MOD', 'mod_revision': vol['cfg_mod'], 'key': 'config/inode/'+str(vol['idx']['pool_id'])+'/'+str(vol['idx']['id']) },
{ 'target': 'VERSION', 'version': 0, 'key': 'index/image/'+to_name },
], 'success': [
{ 'request_delete_range': { 'key': 'index/image/'+vol['cfg']['name'] } },
{ 'request_put': { 'key': 'index/image/'+to_name, 'value': json.dumps(vol['idx']) } },
{ 'request_put': { 'key': 'config/inode/'+str(vol['idx']['pool_id'])+'/'+str(vol['idx']['id']),
'value': json.dumps({ **vol['cfg'], 'name': to_name }) } },
] })
if resp.get('succeeded'):
break
def unmanage(self, volume):
pass
def _add_manageable_snapshot(self, kv, manageable_snapshots, cinder_ids):
cfg = kv['value']
dog = kv['key'].find('@')
if dog < 0:
# snapshot
return
image_name = kv['key'][0 : dog]
snap_name = kv['key'][dog+1 : ]
snapshot_id = volume_utils.extract_id_from_snapshot_name(snap_name)
snapshot_info = {
'reference': {'source-name': snap_name},
'size': int(math.ceil(float(cfg['size']) / units.Gi)),
'cinder_id': None,
'extra_info': None,
'safe_to_manage': False,
'reason_not_safe': None,
'source_reference': {'source-name': image_name}
}
if snapshot_id in cinder_ids:
# Exclude snapshots already managed.
snapshot_info['reason_not_safe'] = ('already managed')
snapshot_info['cinder_id'] = snapshot_id
elif snap_name.endswith('.clone_snap'):
# Exclude clone snapshot.
snapshot_info['reason_not_safe'] = ('used for clone snap')
else:
snapshot_info['safe_to_manage'] = True
manageable_snapshots.append(snapshot_info)
def get_manageable_snapshots(self, cinder_snapshots, marker, limit, offset, sort_keys, sort_dirs):
"""List manageable snapshots in Vitastor."""
manageable_snapshots = []
cinder_snapshot_ids = [resource['id'] for resource in cinder_snapshots]
# List all volumes
# FIXME: It's possible to use pagination in our case, but.. do we want it?
self._etcd_foreach('config/inode/'+str(self.cfg['pool_id']),
lambda kv: self._add_manageable_volume(kv, manageable_snapshots, cinder_snapshot_ids))
return volume_utils.paginate_entries_list(
manageable_snapshots, marker, limit, offset, sort_keys, sort_dirs)
def manage_existing_snapshot_get_size(self, snapshot, existing_ref):
"""Return size of an existing image for manage_existing.
:param snapshot: snapshot ref info to be set
:param existing_ref: {'source-name': <name of snapshot>}
"""
vol_name = utils.convert_str(snapshot.volume_name)
snap_name = self._get_existing_name(existing_ref)
vol = self._get_image(vol_name+'@'+snap_name)
if not vol:
raise exception.ManageExistingInvalidReference(
existing_ref=snapshot_name, reason='Specified snapshot does not exist.'
)
return int(math.ceil(float(vol['cfg']['size']) / units.Gi))
def manage_existing_snapshot(self, snapshot, existing_ref):
"""Manages an existing snapshot.
Renames the snapshot name to match the expected name for the snapshot.
Error checking done by manage_existing_get_size is not repeated.
:param snapshot: snapshot ref info to be set
:param existing_ref: {'source-name': <name of snapshot>}
"""
vol_name = utils.convert_str(snapshot.volume_name)
snap_name = self._get_existing_name(existing_ref)
from_name = vol_name+'@'+snap_name
to_name = vol_name+'@'+utils.convert_str(snapshot.name)
self._rename(from_name, to_name)
def unmanage_snapshot(self, snapshot):
"""Removes the specified snapshot from Cinder management."""
pass
def _dumps(self, obj):
return json.dumps(obj, separators=(',', ':'), sort_keys=True)

23
patches/devstack-local.conf

@ -0,0 +1,23 @@
# Devstack configuration for bridged networking
[[local|localrc]]
ADMIN_PASSWORD=secret
DATABASE_PASSWORD=$ADMIN_PASSWORD
RABBIT_PASSWORD=$ADMIN_PASSWORD
SERVICE_PASSWORD=$ADMIN_PASSWORD
HOST_IP=10.0.2.15
Q_USE_SECGROUP=True
FLOATING_RANGE="10.0.2.0/24"
IPV4_ADDRS_SAFE_TO_USE="10.0.5.0/24"
Q_FLOATING_ALLOCATION_POOL=start=10.0.2.50,end=10.0.2.100
PUBLIC_NETWORK_GATEWAY=10.0.2.2
PUBLIC_INTERFACE=ens3
Q_USE_PROVIDERNET_FOR_PUBLIC=True
Q_AGENT=linuxbridge
Q_ML2_PLUGIN_MECHANISM_DRIVERS=linuxbridge
LB_PHYSICAL_INTERFACE=ens3
PUBLIC_PHYSICAL_NETWORK=default
LB_INTERFACE_MAPPINGS=default:ens3
Q_SERVICE_PLUGIN_CLASSES=
Q_ML2_PLUGIN_TYPE_DRIVERS=flat
Q_ML2_PLUGIN_EXT_DRIVERS=

287
patches/nova-20.diff

@ -0,0 +1,287 @@
diff --git a/nova/virt/image/model.py b/nova/virt/image/model.py
index 971f7e9c07..70ed70d5e2 100644
--- a/nova/virt/image/model.py
+++ b/nova/virt/image/model.py
@@ -129,3 +129,22 @@ class RBDImage(Image):
self.user = user
self.password = password
self.servers = servers
+
+
+class VitastorImage(Image):
+ """Class for images in a remote Vitastor cluster"""
+
+ def __init__(self, name, etcd_address = None, etcd_prefix = None, config_path = None):
+ """Create a new Vitastor image object
+
+ :param name: name of the image
+ :param etcd_address: etcd URL(s) (optional)
+ :param etcd_prefix: etcd prefix (optional)
+ :param config_path: path to the configuration (optional)
+ """
+ super(RBDImage, self).__init__(FORMAT_RAW)
+
+ self.name = name
+ self.etcd_address = etcd_address
+ self.etcd_prefix = etcd_prefix
+ self.config_path = config_path
diff --git a/nova/virt/images.py b/nova/virt/images.py
index 5358f3766a..ebe3d6effb 100644
--- a/nova/virt/images.py
+++ b/nova/virt/images.py
@@ -41,7 +41,7 @@ IMAGE_API = glance.API()
def qemu_img_info(path, format=None):
"""Return an object containing the parsed output from qemu-img info."""
- if not os.path.exists(path) and not path.startswith('rbd:'):
+ if not os.path.exists(path) and not path.startswith('rbd:') and not path.startswith('vitastor:'):
raise exception.DiskNotFound(location=path)
info = nova.privsep.qemu.unprivileged_qemu_img_info(path, format=format)
@@ -50,7 +50,7 @@ def qemu_img_info(path, format=None):
def privileged_qemu_img_info(path, format=None, output_format='json'):
"""Return an object containing the parsed output from qemu-img info."""
- if not os.path.exists(path) and not path.startswith('rbd:'):
+ if not os.path.exists(path) and not path.startswith('rbd:') and not path.startswith('vitastor:'):
raise exception.DiskNotFound(location=path)
info = nova.privsep.qemu.privileged_qemu_img_info(path, format=format)
diff --git a/nova/virt/libvirt/config.py b/nova/virt/libvirt/config.py
index f9475776b3..51573fe41d 100644
--- a/nova/virt/libvirt/config.py
+++ b/nova/virt/libvirt/config.py
@@ -1060,6 +1060,8 @@ class LibvirtConfigGuestDisk(LibvirtConfigGuestDevice):
self.driver_iommu = False
self.source_path = None
self.source_protocol = None
+ self.source_query = None
+ self.source_config = None
self.source_name = None
self.source_hosts = []
self.source_ports = []
@@ -1186,7 +1188,8 @@ class LibvirtConfigGuestDisk(LibvirtConfigGuestDevice):
elif self.source_type == "mount":
dev.append(etree.Element("source", dir=self.source_path))
elif self.source_type == "network" and self.source_protocol:
- source = etree.Element("source", protocol=self.source_protocol)
+ source = etree.Element("source", protocol=self.source_protocol,
+ query=self.source_query, config=self.source_config)
if self.source_name is not None:
source.set('name', self.source_name)
hosts_info = zip(self.source_hosts, self.source_ports)
diff --git a/nova/virt/libvirt/driver.py b/nova/virt/libvirt/driver.py
index 391231c527..34dc60dcdd 100644
--- a/nova/virt/libvirt/driver.py
+++ b/nova/virt/libvirt/driver.py
@@ -179,6 +179,7 @@ VOLUME_DRIVERS = {
'local': 'nova.virt.libvirt.volume.volume.LibvirtVolumeDriver',
'fake': 'nova.virt.libvirt.volume.volume.LibvirtFakeVolumeDriver',
'rbd': 'nova.virt.libvirt.volume.net.LibvirtNetVolumeDriver',
+ 'vitastor': 'nova.virt.libvirt.volume.vitastor.LibvirtVitastorVolumeDriver',
'nfs': 'nova.virt.libvirt.volume.nfs.LibvirtNFSVolumeDriver',
'smbfs': 'nova.virt.libvirt.volume.smbfs.LibvirtSMBFSVolumeDriver',
'fibre_channel': 'nova.virt.libvirt.volume.fibrechannel.LibvirtFibreChannelVolumeDriver', # noqa:E501
@@ -385,10 +386,10 @@ class LibvirtDriver(driver.ComputeDriver):
# This prevents the risk of one test setting a capability
# which bleeds over into other tests.
- # LVM and RBD require raw images. If we are not configured to
+ # LVM, RBD, Vitastor require raw images. If we are not configured to
# force convert images into raw format, then we _require_ raw
# images only.
- raw_only = ('rbd', 'lvm')
+ raw_only = ('rbd', 'lvm', 'vitastor')
requires_raw_image = (CONF.libvirt.images_type in raw_only and
not CONF.force_raw_images)
requires_ploop_image = CONF.libvirt.virt_type == 'parallels'
@@ -775,12 +776,12 @@ class LibvirtDriver(driver.ComputeDriver):
# Some imagebackends are only able to import raw disk images,
# and will fail if given any other format. See the bug
# https://bugs.launchpad.net/nova/+bug/1816686 for more details.
- if CONF.libvirt.images_type in ('rbd',):
+ if CONF.libvirt.images_type in ('rbd', 'vitastor'):
if not CONF.force_raw_images:
msg = _("'[DEFAULT]/force_raw_images = False' is not "
- "allowed with '[libvirt]/images_type = rbd'. "
+ "allowed with '[libvirt]/images_type = rbd' or 'vitastor'. "
"Please check the two configs and if you really "
- "do want to use rbd as images_type, set "
+ "do want to use rbd or vitastor as images_type, set "
"force_raw_images to True.")
raise exception.InvalidConfiguration(msg)
@@ -2603,6 +2604,16 @@ class LibvirtDriver(driver.ComputeDriver):
if connection_info['data'].get('auth_enabled'):
username = connection_info['data']['auth_username']
path = f"rbd:{volume_name}:id={username}"
+ elif connection_info['driver_volume_type'] == 'vitastor':
+ volume_name = connection_info['data']['name']
+ path = 'vitastor:image='+volume_name.replace(':', '\\:')
+ for k in [ 'config_path', 'etcd_address', 'etcd_prefix' ]:
+ if k in connection_info['data']:
+ kk = k
+ if kk == 'etcd_address':
+ # FIXME use etcd_address in qemu driver
+ kk = 'etcd_host'
+ path += ":"+kk+"="+connection_info['data'][k].replace(':', '\\:')
else:
path = 'unknown'
raise exception.DiskNotFound(location='unknown')
@@ -2827,8 +2838,8 @@ class LibvirtDriver(driver.ComputeDriver):
image_format = CONF.libvirt.snapshot_image_format or source_type
- # NOTE(bfilippov): save lvm and rbd as raw
- if image_format == 'lvm' or image_format == 'rbd':
+ # NOTE(bfilippov): save lvm and rbd and vitastor as raw
+ if image_format == 'lvm' or image_format == 'rbd' or image_format == 'vitastor':
image_format = 'raw'
metadata = self._create_snapshot_metadata(instance.image_meta,
@@ -2899,7 +2910,7 @@ class LibvirtDriver(driver.ComputeDriver):
expected_state=task_states.IMAGE_UPLOADING)
# TODO(nic): possibly abstract this out to the root_disk
- if source_type == 'rbd' and live_snapshot:
+ if (source_type == 'rbd' or source_type == 'vitastor') and live_snapshot:
# Standard snapshot uses qemu-img convert from RBD which is
# not safe to run with live_snapshot.
live_snapshot = False
@@ -4099,7 +4110,7 @@ class LibvirtDriver(driver.ComputeDriver):
# cleanup rescue volume
lvm.remove_volumes([lvmdisk for lvmdisk in self._lvm_disks(instance)
if lvmdisk.endswith('.rescue')])
- if CONF.libvirt.images_type == 'rbd':
+ if CONF.libvirt.images_type == 'rbd' or CONF.libvirt.images_type == 'vitastor':
filter_fn = lambda disk: (disk.startswith(instance.uuid) and
disk.endswith('.rescue'))
rbd_utils.RBDDriver().cleanup_volumes(filter_fn)
@@ -4356,6 +4367,8 @@ class LibvirtDriver(driver.ComputeDriver):
# TODO(mikal): there is a bug here if images_type has
# changed since creation of the instance, but I am pretty
# sure that this bug already exists.
+ if CONF.libvirt.images_type == 'vitastor':
+ return 'vitastor'
return 'rbd' if CONF.libvirt.images_type == 'rbd' else 'raw'
@staticmethod
@@ -4764,10 +4777,10 @@ class LibvirtDriver(driver.ComputeDriver):
finally:
# NOTE(mikal): if the config drive was imported into RBD,
# then we no longer need the local copy
- if CONF.libvirt.images_type == 'rbd':
+ if CONF.libvirt.images_type == 'rbd' or CONF.libvirt.images_type == 'vitastor':
LOG.info('Deleting local config drive %(path)s '
- 'because it was imported into RBD.',
- {'path': config_disk_local_path},
+ 'because it was imported into %(type).',
+ {'path': config_disk_local_path, 'type': CONF.libvirt.images_type},
instance=instance)
os.unlink(config_disk_local_path)
diff --git a/nova/virt/libvirt/utils.py b/nova/virt/libvirt/utils.py
index da2a6e8b8a..52c02e72f1 100644
--- a/nova/virt/libvirt/utils.py
+++ b/nova/virt/libvirt/utils.py
@@ -340,6 +340,10 @@ def find_disk(guest: libvirt_guest.Guest) -> ty.Tuple[str, ty.Optional[str]]:
disk_path = disk.source_name
if disk_path:
disk_path = 'rbd:' + disk_path
+ elif not disk_path and disk.source_protocol == 'vitastor':
+ disk_path = disk.source_name
+ if disk_path:
+ disk_path = 'vitastor:' + disk_path
if not disk_path:
raise RuntimeError(_("Can't retrieve root device path "
@@ -354,6 +358,8 @@ def get_disk_type_from_path(path: str) -> ty.Optional[str]:
return 'lvm'
elif path.startswith('rbd:'):
return 'rbd'
+ elif path.startswith('vitastor:'):
+ return 'vitastor'
elif (os.path.isdir(path) and
os.path.exists(os.path.join(path, "DiskDescriptor.xml"))):
return 'ploop'
diff --git a/nova/virt/libvirt/volume/vitastor.py b/nova/virt/libvirt/volume/vitastor.py
new file mode 100644
index 0000000000..0256df62c1
--- /dev/null
+++ b/nova/virt/libvirt/volume/vitastor.py
@@ -0,0 +1,75 @@
+# Copyright (c) 2021+, Vitaliy Filippov <vitalif@yourcmc.ru>
+#
+# 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.
+
+from os_brick import exception as os_brick_exception
+from os_brick import initiator
+from os_brick.initiator import connector
+from oslo_log import log as logging
+
+import nova.conf
+from nova import utils
+from nova.virt.libvirt.volume import volume as libvirt_volume
+
+
+CONF = nova.conf.CONF
+LOG = logging.getLogger(__name__)
+
+
+class LibvirtVitastorVolumeDriver(libvirt_volume.LibvirtBaseVolumeDriver):
+ """Driver to attach Vitastor volumes to libvirt."""
+ def __init__(self, host):
+ super(LibvirtVitastorVolumeDriver, self).__init__(host, is_block_dev=False)
+
+ def connect_volume(self, connection_info, instance):
+ pass
+
+ def disconnect_volume(self, connection_info, instance):
+ pass
+
+ def get_config(self, connection_info, disk_info):
+ """Returns xml for libvirt."""
+ conf = super(LibvirtVitastorVolumeDriver, self).get_config(connection_info, disk_info)
+ conf.source_type = 'network'
+ conf.source_protocol = 'vitastor'
+ conf.source_name = connection_info['data'].get('name')
+ conf.source_query = connection_info['data'].get('etcd_prefix') or None
+ conf.source_config = connection_info['data'].get('config_path') or None
+ conf.source_hosts = []
+ conf.source_ports = []
+ addresses = connection_info['data'].get('etcd_address', '')
+ if addresses:
+ if not isinstance(addresses, list):
+ addresses = addresses.split(',')
+ for addr in addresses:
+ if addr.startswith('https://'):
+ raise NotImplementedError('Vitastor block driver does not support SSL for etcd communication yet')
+ if addr.startswith('http://'):
+ addr = addr[7:]
+ addr = addr.rstrip('/')
+ if addr.endswith('/v3'):
+ addr = addr[0:-3]
+ p = addr.find('/')
+ if p > 0:
+ raise NotImplementedError('libvirt does not support custom URL paths for Vitastor etcd yet. Use /etc/vitastor/vitastor.conf')
+ p = addr.find(':')
+ port = '2379'
+ if p > 0:
+ port = addr[p+1:]
+ addr = addr[0:p]
+ conf.source_hosts.append(addr)
+ conf.source_ports.append(port)
+ return conf
+
+ def extend_volume(self, connection_info, instance, requested_size):
+ raise NotImplementedError
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