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Ceph Cookbook - Second Edition by Karan Singh, Michael Hackett, Vikhyat Umrao

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Starting and stopping all daemons by type

To start or stop all Ceph daemons by their types, perform the following set of commands:

Starting daemons by type:

  1. To start the Ceph monitor daemons on localhost, execute the systemd manager with the start command followed by the daemon type:
# systemctl start ceph-mon.target
  1. To start the Ceph monitor daemon on a remote host, execute the same command with the -H option and the specified hostname. To start mon.1 from ceph-node1 issue:
root@ceph-node1 # systemctl -H ceph-node2 start ceph-mon.target
  1. Similarly, you can start daemons of other types, that is osds, mds, and ceph-radosgw by issuing:
# systemctl start ceph-osd.target# systemctl start ceph-mds.target# systemctl start ceph-radosgw.target ...

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