Self-Healing Containers with Restart Policies

Container restart policies are a simple form of self-healing that allows the local Docker Engine to automatically restart failed containers.

Restart policies

We apply restart policies per container, and Docker supports the following four policies:

• no (default)
• on-failure
• always
• unless-stopped

The following table shows how each policy reacts to different scenarios. A “Y” indicates the policy will attempt a container restart, whereas an “N” indicates it won’t.