Cephadm
cephadm deploys and manages a Ceph cluster. It does this by connecting the
manager daemon to hosts via SSH. The manager daemon is able to add, remove, and
update Ceph containers. cephadm does not rely on external configuration
tools such as Ansible, Rook, and Salt.
cephadm manages the full lifecycle of a Ceph cluster. This lifecycle
starts with the bootstrapping process, when cephadm creates a tiny
Ceph cluster on a single node. This cluster consists of one monitor and
one manager. cephadm then uses the orchestration interface ("day 2"
commands) to expand the cluster, adding all hosts and provisioning all
Ceph daemons and services. Management of this lifecycle can be performed
either via the Ceph command-line interface (CLI) or via the dashboard (GUI).
cephadm is new in Ceph release v15.2.0 (Octopus) and does not support older
versions of Ceph.
- Compatibility and Stability
- Deploying a new Ceph cluster
- Converting an existing cluster to cephadm
- Host Management
- Service Management
- MON Service
- MGR Service
- OSD Service
- RGW Service
- MDS Service
- NFS Service
- iSCSI Service
- Custom Container Service
- Monitoring Services
- SNMP Gateway Service
- Service Status
- Daemon Status
- Service Specification
- Daemon Placement
- Extra Container Arguments
- Removing a Service
- Disabling automatic deployment of daemons
- Upgrading Ceph
- Cephadm operations
- Client Setup
- Troubleshooting
- Pausing or disabling cephadm
- Per-service and per-daemon events
- Checking cephadm logs
- Gathering log files
- Collecting systemd status
- List all downloaded container images
- Manually running containers
- ssh errors
- Failed to infer CIDR network error
- Accessing the admin socket
- Calling miscellaneous ceph tools
- Restoring the MON quorum
- Manually deploying a MGR daemon
- Analyzing core dumps
- Cephadm Feature Planning