def purge_backup(dsn, backup_id, ssh_user, keyfile):
"""Purge backups for a particular backup-id"""
nodes = query_ndb(dsn, query=['backupdatadir'])
for node in nodes:
query = nodes[node]
host = '%s@%s' % (ssh_user, node)
remote_path = os.path.join(query.backupdatadir,
'BACKUP',
'BACKUP-%d' % backup_id)
ssh(host,
'rm -fr %s' % list2cmdline([remote_path]),
keyfile=keyfile)
def archive_data_nodes(dsn,
backup_id,
ssh_user,
keyfile,
target_path):
"""Archive the backups specified by ``backup_id`` on the data nodes
:param dsn: connection string to use to query the data nodes involved
:param backup_id: backup_id of of the backup to archive on each node
:param ssh_user: ssh user to use when archiving data
:param keyfile: ssh keyfile to use for authentication
:raises: ClusterError on failure
"""
nodes = query_ndb(dsn, query=['nodegroup', 'nodeid', 'backupdatadir'])
results = []
for node in nodes:
query = nodes[node]
host = '%s@%s' % (ssh_user, node)
remote_path = os.path.join(query.backupdatadir,
'BACKUP',
'BACKUP-%d' % backup_id)
try:
ssh(host,
'ls -lah ' + list2cmdline([remote_path]),
keyfile=keyfile)
except ClusterCommandError, exc:
if exc.status != 255:
LOG.error("Error when checking Backup path. "
"Skipping backups for node %d", query.nodeid)
continue
# status == 255 errors are probably fatal
raise
rsync(host, keyfile, list2cmdline([remote_path]), target_path)
LOG.info("Archived node %s with backup id %d", node, backup_id)
results.append(query)
