Implement lock flush function for clients
Uses a similar command pathway as the Ceph commands do, but in a different location (pending move of the Ceph commands to a similar location).
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@ -120,6 +120,46 @@ def is_migrated(zk_conn, domain):
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else:
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return False
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def flush_locks(zk_conn, domain):
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# Validate that VM exists in cluster
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dom_uuid = getDomainUUID(zk_conn, domain)
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if not dom_uuid:
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common.stopZKConnection(zk_conn)
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return False, 'ERROR: Could not find VM "{}" in the cluster!'.format(domain)
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# Verify that the VM is in a stopped state; freeing locks is not safe otherwise
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state = zkhandler.readdata(zk_conn, '/domains/{}/state'.format(dom_uuid))
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if state != 'stop':
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return False, 'ERROR: VM "{}" is not in stopped state; flushing RBD locks on a running VM is dangerous.'.format(domain)
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# Tell the cluster to create a new OSD for the host
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flush_locks_string = 'flush_locks {}'.format(dom_uuid)
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zkhandler.writedata(zk_conn, {'/cmd/domains': flush_locks_string})
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# Wait 1/2 second for the cluster to get the message and start working
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time.sleep(0.5)
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# Acquire a read lock, so we get the return exclusively
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lock = zkhandler.readlock(zk_conn, '/cmd/domains')
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with lock:
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try:
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result = zkhandler.readdata(zk_conn, '/cmd/domains').split()[0]
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if result == 'success-flush_locks':
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message = 'Flushed locks on VM "{}"'.format(domain)
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success = True
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else:
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message = 'ERROR: Failed to flush locks on VM "{}"; check node logs for details.'.format(domain)
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success = False
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except:
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message = 'ERROR: Command ignored by node.'
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success = False
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# Acquire a write lock to ensure things go smoothly
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lock = zkhandler.writelock(zk_conn, '/cmd/domains')
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with lock:
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time.sleep(0.5)
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zkhandler.writedata(zk_conn, {'/cmd/domains': ''})
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return success, message
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def define_vm(zk_conn, config_data, target_node, selector):
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# Parse the XML data
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try:
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