Centos7 uses systemctl to start the docker container (container)

docker provides simple commands to manipulate containers. But his command to operate the container does not belong to the system.

Because it is too simple, there must be many shortcomings. For example, startup sequence, dependency check, failed service recovery, etc., all require a mature system service management software to complete.

This article uses redis as an example:
Step 1: Download the mirror

# docker pull docker.io/redis

Step 2: Start the mirror

# docker run -d --name redis_server -p 6379:6379 redis

Step 3: Enter the /etc/systemd/system/ directory and create the docker-container\@.service file

#cd /etc/systemd/system/
#vi /etc/systemd/system/docker-container\@.service

Note: Don't think that docker-container\@.service is missing something, his name is just this.

Copy the following content in

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

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

[Install]
WantedBy=default.target

Step 4: Set up boot (note: start docker first before booting the container)

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

Step 5: Check whether it can start normally

# systemctl start docker-container\@redis_server.service
# systemctl status docker-container\@redis_server.service

Step 5 docker-container\@ calledredis_server.service service is actually docker-container\@.service service. redis replaced %i in the third step

Finally try to restart.

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Self-use

systemctl enable docker-container\@dnmp_mysql.service

systemctl enable docker-container\@dnmp_phpfpm.service

systemctl enable docker-container\@dnmp_nginx.service

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