Troubleshooting network issues
Ceph storage depends highly upon the underlying network configuration and having a dedicated and reliable network connection. The network is one of the most important pieces in the cluster and is used by Ceph nodes in order to communicate with each other. An issue with the networking infrastructure can cause numerous issues on the Ceph cluster, from flapping OSDs (OSDs going down and up) to monitoring clock skew errors. Additionally, networking errors, such as packet loss or high latency, can cause stability and performance issues throughout the cluster.
How to do it...
If a cluster communication issue is suspected, here are some initial checks that can be undertaken:
- Verify that the
ceph.conf
file has the IP address values set forcluster_network
andpublic_network
. - Verify that the networking interface on the nodes is up. You can use a Linux utility, such as
ifconfig
orip address
, to view the state of the configured networking interfaces:

- Validate that all Ceph...