Verify a GlusterFS cluster status¶

If you update or upgrade your MCP cluster, the kvm nodes that usually host the GlusterFS cluster require a reboot for the updates to be applied. In such cases, you have to verify the GlusterFS cluster status after reboot of every node before rebooting the next kvm node.

To verify a GlusterFS cluster status:

1. Log in to the Salt Master node.

2. Verify that the GlusterFS server status is healthy:

   salt -C 'I@glusterfs:server' cmd.run "gluster peer status"
   

   Example of system response:

   kvm01.cookied-cicd-bm-os-contrail40-maas.local:
   Number of Peers: 2
   
   Hostname: 10.167.8.243
   Uuid: 5ac8ee70-40a3-44c4-8ec8-967a0584a0d4
   State: Peer in Cluster (Connected)
   
   Hostname: 10.167.8.242
   Uuid: 8ce5fd88-2cae-47b5-a397-447874686406
   State: Peer in Cluster (Connected)
   
   kvm02.cookied-cicd-bm-os-contrail40-maas.local:
   Number of Peers: 2
   
   Hostname: 10.167.8.243
   Uuid: 5ac8ee70-40a3-44c4-8ec8-967a0584a0d4
   State: Peer in Cluster (Connected)
   
   Hostname: kvm01.cookied-cicd-bm-os-contrail40-maas.local
   Uuid: 6bf7eccb-69a2-42bd-b033-50d683120130
   State: Peer in Cluster (Connected)
   
   kvm03.cookied-cicd-bm-os-contrail40-maas.local:
   Number of Peers: 2
   
   Hostname: 10.167.8.242
   Uuid: 8ce5fd88-2cae-47b5-a397-447874686406
   State: Peer in Cluster (Connected)
   
   Hostname: kvm01.cookied-cicd-bm-os-contrail40-maas.local
   Uuid: 6bf7eccb-69a2-42bd-b033-50d683120130
   State: Peer in Cluster (Connected)
   

3. Verify that the GlusterFS client status is healthy:

   salt -C 'I@glusterfs:client and not I@glusterfs:server' test.ping
   

   Example of system response:

   cid03.cookied-cicd-bm-os-contrail40-maas.local:
       True
   cid02.cookied-cicd-bm-os-contrail40-maas.local:
       True
   cid01.cookied-cicd-bm-os-contrail40-maas.local:
       True
   ctl03.cookied-cicd-bm-os-contrail40-maas.local:
       True
   prx02.cookied-cicd-bm-os-contrail40-maas.local:
       True
   prx01.cookied-cicd-bm-os-contrail40-maas.local:
       True
   ctl01.cookied-cicd-bm-os-contrail40-maas.local:
       True
   ctl02.cookied-cicd-bm-os-contrail40-maas.local:
       True
   

4. If any of the above commands fail, refer to the GlusterFS official documentation to troubleshoot the required services.

5. Verify the GlusterFS volumes status as described in Verify the GlusterFS volumes status.