For all distributions that support systemd (CentOS 7, Fedora, Debian Jessie 8 and later, SUSE), ceph daemons are now managed using native systemd files instead of the legacy sysvinit scripts. For example:
sudo systemctl start ceph.target # start all daemons
sudo systemctl status ceph-osd@12 # check status of osd.12
To list the Ceph systemd units on a node, execute:
sudo systemctl status ceph\*.service ceph\*.target
To start all daemons on a Ceph Node (irrespective of type), execute the following:
sudo systemctl start ceph.target
To stop all daemons on a Ceph Node (irrespective of type), execute the following:
sudo systemctl stop ceph\*.service ceph\*.target
To start all daemons of a particular type on a Ceph Node, execute one of the following:
sudo systemctl start ceph-osd.target
sudo systemctl start ceph-mon.target
sudo systemctl start ceph-mds.target
To stop all daemons of a particular type on a Ceph Node, execute one of the following:
sudo systemctl stop ceph-mon\*.service ceph-mon.target
sudo systemctl stop ceph-osd\*.service ceph-osd.target
sudo systemctl stop ceph-mds\*.service ceph-mds.target
To start a specific daemon instance on a Ceph Node, execute one of the following:
sudo systemctl start ceph-osd@{id}
sudo systemctl start ceph-mon@{hostname}
sudo systemctl start ceph-mds@{hostname}
For example:
sudo systemctl start ceph-osd@1
sudo systemctl start ceph-mon@ceph-server
sudo systemctl start ceph-mds@ceph-server
To stop a specific daemon instance on a Ceph Node, execute one of the following:
sudo systemctl stop ceph-osd@{id}
sudo systemctl stop ceph-mon@{hostname}
sudo systemctl stop ceph-mds@{hostname}
For example:
sudo systemctl stop ceph-osd@1
sudo systemctl stop ceph-mon@ceph-server
sudo systemctl stop ceph-mds@ceph-server
原文：https://www.cnblogs.com/weifeng1463/p/13744124.html