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Docker containers return an exit code when they change their state from running.
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A non-zero exit code means that the container has crashed. All crashed containers remain in stopped mode
To view all the containers, including stopped ones, use the following command:
$ docker ps -a
- To view the log files of the crashed container, use the following command:
$ docker logs [container name or ID]
Note: Most crashes are generic and can be easily fixed by relaunching the container. Thus, it is a good practise to create a restart policy on failure of the container
Restart Policy on Failure
$ docker run --restart=on-failure:[Number of times to restart] [docker image]
Restart Policy - always restart on crash
$ docker run --restart=always [image name]
