How to do it...

If a cluster communication issue is suspected, here are some initial checks that can be undertaken:

  1. Verify that the ceph.conf file has the IP address values set for cluster_network and public_network.
  2. Verify that the networking interface on the nodes is up. You can use a Linux utility, such as ifconfig or ip address, to view the state of the configured networking interfaces:
  1. Validate that all Ceph nodes are able to communicate via short hostnames. You can validate that the /etc/hosts file on each node is properly updated.

  1. Validate that the proper firewall ports are open for each component in the Ceph cluster. You can ...

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