/lib/systemd/system/ceph-volume@.service:8: Unit configured to use KillMode=none. This is unsafe, as it disables systemd's process lifecycle management for the service. Please update your service to use a safer KillMode=, such as 'mixed' or 'control-group

• KillMode=none: No processes in the control group will be killed. This setting is rarely used because it can lead to orphaned processes that remain running after the service is stopped.
• KillMode=control-group: All processes in the control group of the service will be terminated when the service is stopped. This is aggressive and can sometimes cause issues if there are processes that should not be killed immediately or if there are dependencies that need a more graceful shutdown.
• KillMode=process: Only the main process of the service will be killed. This is less aggressive but can also leave orphaned child processes.
• KillMode=mixed: The main process will receive a SIGTERM signal to allow it to terminate gracefully, while all remaining processes in the control group will be terminated with SIGKILL if they do not exit within a timeout. This mode provides a balanced approach, giving the main process a chance to clean up properly while ensuring that any lingering processes are forcibly terminated after the grace period.

 

vim /lib/systemd/system/ceph-volume@.service

[Unit]
Description=Ceph Volume activation: %i
After=local-fs.target
Wants=local-fs.target

[Service]
Type=oneshot
KillMode=none
Environment=CEPH_VOLUME_TIMEOUT=10000
ExecStart=/bin/sh -c 'timeout $CEPH_VOLUME_TIMEOUT /usr/sbin/ceph-volume-systemd %i'
TimeoutSec=0

[Install]
WantedBy=multi-user.target

 

KillMode=none -> KillMode=mixed