def handler(domain_name, node_from, node_to, starsst, end, info,
success, error):
logger.info('Migrated status: %s - %s' % (domain_name, success))
# Migration failed
if success == False:
print 'Error - migration failed, checking if domain still exists...'
_, lv_connection = util.find_domain(domain)
if lv_connection is not None:
logger.info('Retrying migration: %s -> %s' % (domain, target_node))
reactor.callFromThread(lambda: allocation.migrateDomain(domain, lv_connection.getHostname(),
target_node, handler))
# Retry
return
else:
print 'Error - Fatal - Could not retry migration, domain is not active in the infrastructure'
# Trigger defer callback - for successful and unsuccessful migrations
reactor.callFromThread(lambda: dret.callback(domain_name))
def start_and_migrate(domain, target_node):
'''
Start domain and migrate it to the target node
'''
# Get libivrt connection
_, lv_connection = util.find_domain(domain)
# Lookup libvirt domain object
lv_domain = lv_connection.lookupByName(domain)
# Launch domain
print 'Starting domain: %s' % domain
started = False
while not started:
try:
lv_domain.create()
started = True
except:
print 'ERROR while starting domain'
print sys.exc_info()[0]
print 'retrying...'
# Create a deferred to return
dret = defer.Deferred()
# Migration callback handler
def handler(domain_name, node_from, node_to, starsst, end, info,
success, error):
logger.info('Migrated status: %s - %s' % (domain_name, success))
# Migration failed
if success == False:
print 'Error - migration failed, checking if domain still exists...'
_, lv_connection = util.find_domain(domain)
if lv_connection is not None:
logger.info('Retrying migration: %s -> %s' % (domain, target_node))
reactor.callFromThread(lambda: allocation.migrateDomain(domain, lv_connection.getHostname(),
target_node, handler))
# Retry
return
else:
print 'Error - Fatal - Could not retry migration, domain is not active in the infrastructure'
# Trigger defer callback - for successful and unsuccessful migrations
reactor.callFromThread(lambda: dret.callback(domain_name))
# Check if migration is necessary
if lv_connection.getHostname().find(target_node) == -1:
# Migration is neccessary
logger.info('Migrating: %s -> %s from %s' % (domain, target_node, lv_connection.getHostname()))
allocation.migrateDomain(domain, lv_connection.getHostname(),
target_node, handler)
else:
# Migration is NOT necessary
logger.info('Skipping: %s -> %s from %s' % (domain, target_node, lv_connection.getHostname()))
# reactor.callLater(3, lambda: dret.callback(domain))
return domain
# Return deferred object that will be called after the migration
return dret
