In the last recipe, we learned about Ceph service management using sysvinit; in this recipe, we will understand managing Ceph as a service, that is, using the Linux service command. Starting from the Ceph Argonaut release, we can manage Ceph daemons using the Linux service command with the following syntax:
service ceph [options] [command] [daemons]
To start or stop all Ceph daemons, perform the following set of commands.
Let's see how to start and stop all Ceph daemons:
- To start your Ceph cluster, execute Ceph with the
startcommand. This command will start all Ceph services that you have deployed for all the hosts mentioned in theceph.conffile. Once you start Ceph with the-aoption, Ceph should begin operating:# service ceph -a start - To stop your Ceph cluster, execute Ceph with the
stopcommand. This command will stop all Ceph services that you have deployed for all the hosts mentioned in theceph.conffile. Once you stop Ceph using the-aoption, Ceph should shut down:# service ceph -a stop
To start or stop all Ceph daemons by their types, perform the following set of commands.
Let's see how to start and stop daemons by type.
- To start the Ceph monitor daemons on localhost, execute the Ceph service with the
startcommand followed by the daemon type:# service ceph start mon - To start the Ceph monitor daemons on all the hosts, execute the same command with the
-aoption:# service ceph -a start mon - Similarly, you can start daemons of other types, that is,
osd,mds, andceph-radosgw:# service ceph start osd # service ceph start mds # service ceph start ceph-radosgw
- To stop the Ceph monitor daemons on localhost, execute
service cephwith thestopcommand followed by the daemon type:# service ceph stop mon - To stop the Ceph monitor daemons on all the hosts, execute the same command with the
-aoption:# service ceph -a stop mon - Similarly, you can stop daemons of other types, that is,
osd,mds, andceph-radosgw:# service ceph stop osd # service ceph stop mds # service ceph stop ceph-radosgw
Let's see how to start and stop specific daemons.
To start a specific daemon on localhost, execute Ceph with the start command followed by {daemon_type}.{instance}, for example:
- Start the
mon.0daemon:# service ceph start mon.ceph-node1 - Similarly, you can start other daemons and their instances:
# service ceph start osd.1 # service ceph -a start mds.ceph-node2 # service ceph start ceph-radosgw.gateway1
To stop a specific Ceph daemon on localhost, execute Ceph with the stop command followed by {daemon_type}.{instance}, for example:
- Stop the
mon.0daemon:# service ceph start mon.ceph-node1 - Similarly, you can stop other daemons and their instances:
# service ceph stop osd.1 # service ceph -a stop mds.ceph-node2 # service ceph stop ceph-radosgw.gateway1