Docker considers any containers to exit with a non-zero exit code to have crashed. By default a crashed container will remain stopped.
We've created a special container which outputs a message and then exits with code 1 to simulate a crash.
You can launch an instance using
docker run -d --name restart-default scrapbook/docker-restart-example
If you list all the containers, including stopped, you will see the container has crashed
docker ps -a
While the logs will output our message, which in real-life would hopefully indicate information to help us diagnose the issue.
docker logs restart-default