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22 changes: 11 additions & 11 deletions engine/admin/host_integration.md
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Expand Up @@ -59,40 +59,40 @@ a new service that will be started after the docker daemon service has started.
### systemd

[Unit]
Description=Redis container
Description=Docker Container %I
Requires=docker.service
After=docker.service

[Service]
Restart=always
ExecStart=/usr/bin/docker start -a redis_server
ExecStop=/usr/bin/docker stop -t 2 redis_server
ExecStart=/usr/bin/docker start -a %i
ExecStop=/usr/bin/docker stop -t 2 %i

[Install]
WantedBy=default.target

If you intend to use this as a system service, put the above contents in a file
in the `/etc/systemd/system` directory, e.g.
`/etc/systemd/system/docker-redis_server.service`.
`/etc/systemd/system/docker-container@.service`.

If you need to pass options to the redis container (such as `--env`),
then you'll need to use `docker run` rather than `docker start`. This will
create a new container every time the service is started, which will be stopped
and removed when the service is stopped. Make sure you don't use "`-d`" for
"detached mode". The command run from "`ExecStart`" needs to run in the foreground.

systemctl edit docker-container@redis_server.service

[Service]
...
ExecStart=/usr/bin/docker run --env foo=bar --name redis_server redis
ExecStop=/usr/bin/docker stop -t 2 redis_server
ExecStopPost=/usr/bin/docker rm -f redis_server
...
ExecStart=
ExecStart=/usr/bin/docker run --env foo=bar --name %i redis
ExecStopPost=/usr/bin/docker rm -f %i

To start using the service, reload systemd and start the service:

systemctl daemon-reload
systemctl start docker-redis_server.service
systemctl start docker-container@redis_server.service

To enable the service at system startup, execute:

systemctl enable docker-redis_server.service
systemctl enable docker-container@redis_server.service