Monitoring of Docker containers with systemd

_readme.md

Monitoring of Docker containers with systemd

Service

• create service file /etc/systemd/system/docker_redis.service

[Unit]
Description=docker redis
After=docker.service
Requires=docker.service

[Service]
TimeoutStartSec=0
Restart=always
RestartSec=10s
Type=notify
NotifyAccess=all

# run - basic
ExecStart=/usr/bin/docker start -a redis
ExecStop=/usr/bin/docker stop -t 2 redis




[Install]
WantedBy=multi-user.target

It will monitor and restart docker container named 'redis'.

Service with Systemd-docker

This is a wrapper for docker run so that you can sanely run Docker containers under systemd. https://github.com/ibuildthecloud/systemd-docker

• Build systemd-docker from https://github.com/ibuildthecloud/systemd-docker

Use go to build systemd-docker

go get github.com/ibuildthecloud/systemd-docker

• copy systemd-docker to /opt/bin/systemd-docker

Systemd service for Docker container running with systemd-docker

• create service file /etc/systemd/system/docker_redis.service

[Unit]
Description=docker redis
After=docker.service
Requires=docker.service

[Service]
TimeoutStartSec=0
Restart=always
RestartSec=10s
Type=notify
NotifyAccess=all

# run using system-docker
ExecStart=/opt/bin/systemd-docker run --name redis
#ExecStop=/opt/bin/systemd-docker stop redis



[Install]
WantedBy=multi-user.target

It will start container named 'redis'. The container 'redis' must be created before. It will not build an image and will not create a container from image.

If you want to create and run container from image, use this command:

ExecStart=/opt/bin/systemd-docker run --rm --name redis redis

It will build image 'redis' and run a container from the image.

Systemd service

• enable service

sudo systemctl enable docker_redis

• run service

sudo systemctl start docker_redis

• check the container is running

sudo docker ps -a | grep redis

• stop the container

sudo docker stop redis

• wait until the container is running again

Read more:

• http://container-solutions.com/running-docker-containers-with-systemd/

systemd-docker looks not maintained nowadays.

I've built my own solution to manage Docker containers as systemd services: https://github.com/rpavlyuk/systemdock
Allows you to provide additional options to the container when started as a service.