ceph

Check cluster health status

$ ceph status

$ ceph df

$ ceph pg dump --format [plain]

$ ceph osd pool create [pool_name] [page_number]

$ ceph osd pool delete [pool_name]

$ ceph osd pool rename [current_name] [new_name]

$ ceph pg repair [pool_name]

ceph [options] command

ceph is the command-line interface for managing Ceph distributed storage clusters. Ceph provides unified object, block, and file storage with automatic data replication, self-healing, and no single point of failure.
The command communicates with the Ceph monitor daemons to perform cluster administration tasks including checking health status, managing OSDs (Object Storage Daemons), configuring placement groups, and handling authentication. It serves as the primary tool for day-to-day cluster operations and troubleshooting.
Ceph organizes data into pools, which contain placement groups that map to OSDs across the cluster. The `ceph status` command provides a quick overview of cluster health, while more specific subcommands allow fine-grained control over individual components.

-s, --status

Show cluster status

Output format: json, plain

Use alternate config file

/etc/ceph/ceph.conf

Main cluster configuration including monitor addresses, authentication settings, and OSD parameters.

Admin authentication keyring for cluster access.

status

Show cluster health and status

Show cluster disk usage

Manage Object Storage Daemons

Manage placement groups

Manage monitor daemons

Manage metadata servers

Manage authentication

Requires proper Ceph configuration and authentication. Cluster operations may take time to complete. Some commands require specific permissions.

cephadm(8), rbd(8), rados(8)