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clone-zadara-volume.py
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clone-zadara-volume.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import os
import time
import logging
import logging.config
import logging.handlers
import yaml
from zadarest import ZConsoleClient
from zadarest import ZVpsaClient
logger = None
def setup_logging( log_conf=None ):
if log_conf is None:
logging.basicConfig( level=logging.DEBUG )
else:
logging.config.dictConfig( dict( log_conf ) )
logging.info( 'start logging for %s at %s' %
( __name__, time.strftime( "%y%m%d-%H%M", time.localtime() ) ) )
def read_config( config_file_path ):
with open( config_file_path, 'r' ) as ymlfile:
config = yaml.load( ymlfile )
# some validation of config
if 'zadara_cloud_console' not in config.keys() or 'url' not in config['zadara_cloud_console'].keys():
logger.critical('missing zadara CLOUD CONSOLE URL config')
exit( 1 )
if 'zadara_vpsa' not in config.keys() or 'volume_export_path' not in config['zadara_vpsa'].keys():
logger.critical('missing zadara volume EXPORT PATH config')
exit( 1 )
if 'logging' not in config.keys():
config['logging'] = None
return config
def get_value_from_env_or_user_input( env_var_name, msg="enter your value: " ):
value = None
if env_var_name in os.environ:
value = os.environ[ env_var_name ]
while not value:
value = str( raw_input( msg ) )
return value
def setup_zadara_console_client():
token = get_value_from_env_or_user_input(
'ZADARA_CONSOLE_ACCESS_TOKEN',
'enter your zadara CONSOLE access token: ' )
zcon = ZConsoleClient( cfg['zadara_cloud_console']['url'], token )
logger.debug('set zconsole for url(%s)' % cfg['zadara_cloud_console']['url'] )
logger.debug('zconsole object is (%s)' % zcon )
return zcon
def setup_zadara_vpsa_client( z_console_client, vpsa_id ):
token = get_value_from_env_or_user_input(
'ZADARA_VPSA_ACCESS_TOKEN',
'enter your zadara VPSA token: ' )
zvpsa = ZVpsaClient( z_console_client, vpsa_token=token, vpsa_id=vpsa_id )
logger.debug('set zvpsa for id (%d)' % vpsa_id )
logger.debug('zvpsa object is (%s)' % zvpsa )
return zvpsa
def setup_zadara_client():
zcon = setup_zadara_console_client()
vpsa_token = get_value_from_env_or_user_input(
'ZADARA_VPSA_ACCESS_TOKEN',
'enter your zadara VPSA token: ' )
os.environ['ZADARA_VPSA_ACCESS_TOKEN'] = vpsa_token
vpsa = zcon.vpsa_by_export_path( cfg['zadara_vpsa']['volume_export_path'], vpsa_token )
if vpsa is None:
logger.critical(
'vpsa with export_path(%s) not found; maybe it is hibernated?' %
cfg['zadara_vpsa']['volume_export_path'] )
exit( 1 )
logger.debug('found vpsa with export_path (%s)! it has id (%d)' % (
cfg['zadara_vpsa']['volume_export_path'], vpsa['id']) )
zcli = setup_zadara_vpsa_client( zcon, vpsa['id'] )
return zcli
def print_snapshot_list_from_volume( cli, volume ):
snapshots = {}
snap_list = cli.get_snapshots_for_cgroup( volume['cg_name'] )
if snap_list is None or 0 == len( snap_list ):
logger.critical(
'no snapshots available for volume with export_path(%s)' %
volume['nfs_export_path'] )
exit( 1 )
logger.debug('return from snapshot list has (%d) elements' % len( snap_list ) )
i = 1
print 'available snapshots for volume with export_path(%s):' % volume['nfs_export_path']
for s in snap_list:
print '%d: %s [%s]' % ( i, s['modified_at'], s['display_name'] )
snapshots[i] = s
i += 1
return snapshots
def clone_from_snapshot( cli, volume, snapshot_id ):
timestamp = time.strftime( "%y%m%d_%H%M", time.localtime() )
#clone_volume_display_name = 'clone_snap_%s_on_%s' % ( snapshot_id.replace('-', '_'), timestamp )
clone_volume_display_name = 'clone_on_%s' % timestamp
logger.debug( 'cloning volume (%s) with display_name (%s), from snapshot_id (%s)' %
( volume['cg_name'], clone_volume_display_name, snapshot_id ) )
clone = cli.clone_volume(
cgroup=volume['cg_name'],
clone_name=clone_volume_display_name,
snap_id=snapshot_id )
timeout_in_sec = 5
max_checks = 5
i = 0
while clone is None and i < max_checks:
time.sleep( timeout_in_sec )
clone = cli.get_volume_by_display_name( clone_volume_display_name )
i += 1
if i == max_checks and clone is None:
logger.critical('error cloning volume')
exit( 1 )
logger.debug( 'cloned volume object is (%s)' % clone )
return clone
def shift_export_paths( cli, source_volume, clone_volume ):
timestamp = time.strftime( "%y%m%d-%H%M", time.localtime() )
de_facto_export_path = source_volume['nfs_export_path']
inactive_export_path = '%s_%s' % ( source_volume['nfs_export_path'], timestamp )
logger.debug('preparing to shift export paths: (%s)-->(%s)-->X(%s)' %
( inactive_export_path, de_facto_export_path, clone_volume['nfs_export_path'] ) )
src_servers = cli.detach_volume_from_all_servers( source_volume['name'] )
src_volume_name = cli.update_export_name_for_volume(
source_volume['name'],
os.path.basename( inactive_export_path ) )
logger.debug('detached source_volume from all servers (%s)' % src_servers )
clone_volume_name = cli.update_export_name_for_volume(
clone_volume['name'],
os.path.basename( de_facto_export_path ) )
clone_servers = cli.attach_volume_to_servers( clone_volume['name'], src_servers )
logger.debug('attached all servers to clone volume (%s)' % clone_servers )
logger.debug('src_volume_name(%s) and clone_volume_name(%s)' % ( src_volume_name,
clone_volume_name ) )
return ( src_volume_name, clone_volume_name )
def copy_snapshot_policies( cli, source_volume, clone_volume ):
src_policies = cli.get_snapshot_policies_for_cgroup( source_volume['cg_name'] )
logger.debug('policies from src_volume (%s)' % src_policies )
for p in src_policies:
cli.attach_snapshot_policy_to_cgroup( clone_volume['cg_name'], p['name'] )
logger.debug('policies now attached to clone_volume as well...')
return src_policies
if __name__ == '__main__':
cfg = read_config( 'config.yml' )
setup_logging( cfg['logging'] )
logger = logging.getLogger( __name__ )
logger.info('STEP 1. logging configured!')
logger.info('STEP 2. setting up zadara client...')
zcli = setup_zadara_client()
logger.info('STEP 3. finding volume to be clone by export_path (%s)' %
cfg['zadara_vpsa']['volume_export_path'])
volume_to_clone_info = zcli.get_volume_by_export_path( cfg['zadara_vpsa']['volume_export_path'] )
logger.info('STEP 4. volume found (%s); printing snapshots available',
volume_to_clone_info['display_name'] )
snapshots = print_snapshot_list_from_volume( zcli, volume_to_clone_info )
s_index = None
while not s_index and s_index not in snapshots.keys():
s_index = int( raw_input('which snapshot to clone? [1..%d]: ' % len( snapshots ) ) )
logger.info('STEP 5. snapshot picked (%s), cloning...' % snapshots[ s_index
]['display_name'] )
clone_info = clone_from_snapshot(
zcli,
volume_to_clone_info,
snapshots[ s_index ]['name'] )
logger.info('STEP 6. cloned as volume (%s); changing export_paths...' %
clone_info['display_name'] )
( src_path, clone_path ) = shift_export_paths(
zcli,
volume_to_clone_info,
clone_info )
logger.info('STEP 7. attaching snapshot policies...')
p_list = copy_snapshot_policies(
zcli,
volume_to_clone_info,
clone_info )
logger.info('STEP 8. remount shared storage in mh nodes and we are done.')