Part II Cluster Operation #

When you have a running cluster, you may use the ceph tool to monitor it. Determining the cluster state typically involves checking the status of Ceph OSDs, Ceph Monitors, placement groups, and Metadata Servers.

To modify the configuration of an existing Ceph cluster, follow these steps:

You can operate Ceph services on a daemon, node, or cluster level. Depending on which approach you need, use cephadm or the systemctl command.

This chapter explains which parts of the Ceph cluster you should back up in order to be able to restore its functionality.

In SUSE Enterprise Storage 7, cephadm deploys a monitoring and alerting stack. Users need to either define the services (such as Prometheus, Alertmanager, and Grafana) that they want to deploy with cephadm in a YAML configuration file, or they can use the CLI to deploy them. When multiple services o…