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Database creation fails​

Problem:

TASK [keystone : Creating keystone database] ***********************************
fatal: [testbed-node-0]: FAILED! => changed=false
  action: mysql_db
  msg: 'unable to find /var/lib/ansible/.my.cnf. Exception message: (2003, "Can''t connect to MySQL server on ''api-int.local'' ([Errno 111] Connection refused)")'

Solution:

Restart the kolla_toolbox container. in this case on the node testbed-node-0.

$ osism console testbed-node-0/
testbed-node-0>>> restart kolla_toolbox
kolla_toolbox
testbed-node-0>>>

Ceph connections not working​

  • Problem: auth: error parsing file or auth: failed to load

    $ docker exec -ti nova_compute ceph -k /etc/ceph/ceph.client.nova.keyring -n client.nova -s
    2024-06-28T06:43:05.660+0000 7d5df526b640 -1 auth: error parsing file /etc/ceph/ceph.client.nova.keyring: cannot parse buffer: Malformed input
    2024-06-28T06:43:05.660+0000 7d5df526b640 -1 auth: failed to load /etc/ceph/ceph.client.nova.keyring: (5) Input/output error
    2024-06-28T06:43:05.664+0000 7d5df526b640 -1 auth: error parsing file /etc/ceph/ceph.client.nova.keyring: cannot parse buffer: Malformed input
    2024-06-28T06:43:05.664+0000 7d5df526b640 -1 auth: failed to load /etc/ceph/ceph.client.nova.keyring: (5) Input/output error
    2024-06-28T06:43:05.664+0000 7d5df526b640 -1 auth: error parsing file /etc/ceph/ceph.client.nova.keyring: cannot parse buffer: Malformed input
    2024-06-28T06:43:05.664+0000 7d5df526b640 -1 auth: failed to load /etc/ceph/ceph.client.nova.keyring: (5) Input/output error
    2024-06-28T06:43:05.664+0000 7d5df526b640 -1 auth: error parsing file /etc/ceph/ceph.client.nova.keyring: cannot parse buffer: Malformed input
    2024-06-28T06:43:05.664+0000 7d5df526b640 -1 auth: failed to load /etc/ceph/ceph.client.nova.keyring: (5) Input/output error
    2024-06-28T06:43:05.664+0000 7d5df526b640 -1 monclient: keyring not found
    [errno 5] RADOS I/O error (error connecting to the cluster)

    Solution:

    Check your Ceph keyfiles. Probably a missing newline at the EOF.

Cinder volume create failure​

  • Problem: Volume creation is stuck after creation of the database object with no host assigned.

    Solution:

    Database objects are created by the API service for valid request while the host is assigned by the scheduler.

    • Check the scheduler logs for errors
    • If there is nothing wrong with the scheduler itself, check the communication between the services via oslo.messaging Usually this is done via rabbitmq:
      • Check cluster status on every node for status, alarms and network partitions 
        docker exec rabbitmq rabbitmqctl cluster_status
      • Check rabbitmq logs for errors
      • Check rabbitmq queues for errors or accumulated messages 
        docker exec rabbitmq rabbitmqctl list_queues name type state consumers messages | grep -E '^cinder'
    • If everything seems fine check network connectivity to rule out network issues 
      osism validate kolla-connectivity
    • If networking is fine then as a last resort a reset of rabbitmq may be considered Beware that this will destroy rabbitmq state which may result in inconsitent resource states 
      osism apply rabbitmq-reset-state