def attach(self, dbg, configuration):
uri = configuration['uri']
log.debug('{}: SR.attach: config={}, uri={}'.format(
dbg, configuration, uri))
nfs_uri = urlparse.urlsplit(uri)
if nfs_uri.scheme != 'nfs':
raise ValueError('Incorrect URI scheme')
nfs_server = '{0}:{1}'.format(nfs_uri.netloc, nfs_uri.path)
sr_uuid = configuration['sr_uuid']
mnt_path = self._mount_path(sr_uuid)
sr_dir = os.path.join(mnt_path, sr_uuid)
sr = urlparse.urlunsplit(('file', '', sr_dir, None, None))
if os.path.exists(mnt_path) and os.path.ismount(mnt_path):
log.debug("%s: SR.attach: uri=%s ALREADY ATTACHED" % (dbg, uri))
return sr
log.debug("%s: SR.attach: uri=%s NOT ATTACHED YET" % (dbg, uri))
# Mount the file system
mnt_path = self._mount(dbg, nfs_server, sr_uuid)
if not os.path.exists(sr_dir) or not os.path.isdir(sr_dir):
raise ValueError('SR directory doesn\'t exist')
# Start GC for this host
COWCoalesce.start_gc(dbg, 'nfs-ng', sr)
return sr
def attach(self, dbg, configuration):
uri = configuration['file-uri']
log.debug('{}: SR.attach: config={}, uri={}'.format(
dbg, configuration, uri))
sr = urlparse.urlparse(uri).path
# Start GC for this host
COWCoalesce.start_gc(dbg, 'filebased', sr)
return sr
def detach(self, dbg, sr):
# stop GC
try:
COWCoalesce.stop_gc(dbg, 'nfs-ng', sr)
except:
log.debug('GC already stopped')
# Unmount the FS
sr_path = urlparse.urlparse(sr).path
mnt_path = os.path.dirname(sr_path)
self._unmount(dbg, mnt_path)
os.rmdir(mnt_path)
def attach(self, dbg, configuration):
uri = configuration['device']
log.debug('{}: SR.attach: config={}, uri={}'.format(
dbg, configuration, uri))
dev_path = urlparse.urlparse(uri).path
sr = self._mount_path(configuration['sr_uuid'])
# SR.attach is idempotent
if os.path.ismount(sr):
log.debug('{}: SR.attach: already mounted on {}'.format(dbg, sr))
return sr
# Mount the ext4 filesystem
util.mkdir_p(sr)
ext4_mount(dbg, dev_path, sr)
log.debug('{}: SR.attach: mounted on {}'.format(dbg, sr))
# Start GC for this host
COWCoalesce.start_gc(dbg, 'ext4-ng', sr)
return sr
def _detach(self, dbg, sr):
# stop GC
try:
COWCoalesce.stop_gc(dbg, 'ext4-ng', sr)
except:
log.debug('GC already stopped')
def detach(self, dbg, sr):
# stop GC
try:
COWCoalesce.stop_gc(dbg, 'filebased', sr)
except:
log.debug('GC already stopped')