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Chapter 2. Process Management
Each time you want to start, restart, and stop the Ceph daemons, you must specify the daemon type or the daemon instance.
2.1. Running Ceph as a systemd Service Copier lienLien copié sur presse-papiers!
In Red Hat Ceph Storage 2, all process management is done through the Systemd service.
2.1.1. Starting, Stopping, Restarting All Daemons Copier lienLien copié sur presse-papiers!
To start, stop, or restart all the Ceph daemons, execute the following commands from the local node running the Ceph daemons, and as root:
Start All Ceph Daemons
# systemctl start ceph.targetStop All Ceph Daemons
# systemctl stop ceph.targetRestart All Ceph Daemons
# systemctl restart ceph.target
2.1.2. Starting, Stopping, Restarting All Daemons by Type Copier lienLien copié sur presse-papiers!
To start, stop, or restart all Ceph daemons of a particular type, execute the following commands from the local node running the Ceph daemons, and as root:
All Monitor Daemons
Starting:
# systemctl start ceph-mon.targetStopping:
# systemctl stop ceph-mon.targetRestarting:
# systemctl restart ceph-mon.target
All OSD Daemons
Starting:
# systemctl start ceph-osd.targetStopping:
# systemctl stop ceph-osd.targetRestarting:
# systemctl restart ceph-osd.target
All RADOS Gateway Daemons
Starting:
# systemctl start ceph-radosgw.targetStopping:
# systemctl stop ceph-radosgw.targetRestarting:
# systemctl restart ceph-radosgw.target
2.1.3. Starting, Stopping, Restarting a Daemon by Instances Copier lienLien copié sur presse-papiers!
To start, stop, or restart a Ceph daemon of a particular type by instance, execute the following commands from the local node running the Ceph daemons, and as root:
Monitor Instance
Starting:
# systemctl start ceph-mon@<monitor_hostname>Stopping:
# systemctl stop ceph-mon@<monitor_hostname>Restarting:
# systemctl restart ceph-mon@<monitor_hostname>
OSD Instance
Starting:
# systemctl start ceph-osd@<OSD_number>Stopping:
# systemctl stop ceph-osd@<OSD_number>Restarting:
# systemctl restart ceph-osd@<OSD_number>
RADOS Gateway Instance
Starting:
# systemctl start ceph-radosgw@rgw.<gateway_hostname>Stopping:
# systemctl stop ceph-radosgw@rgw.<gateway_hostname>Restarting:
# systemctl restart ceph-radosgw@rgw.<gateway_hostname>