Docker restart policies.

Policies:

• no - this is defualt value
• no-failure - restart container if it returns an error exit code. It also supports maximum numbers of times Docker will try.
• unless-stopped - only restart container if it is running after reboot or restart docker service
• always - Always keep the container running

Setting restart policy using docker run

docker run -d --name container_name --restart always image_name
docker run -d --name container_name --restart on-failure:5 image_name

Updating exist contianer

docker update --restart=always container_name

Reference: Ensuring Containers Are Always Running with Docker’s Restart Policy

Written on April 10, 2017