How can i persist my logs/data to local filesystem in docker

Question

have an application running inside docker container. the application writes log messages into local log files. how can i make the log file persistent in case the docker container stops or crashes?

Since the container are run time entity ,when i stop the image my logs/data is gone.

Thanks, Sohan

Answer 1

You can do this using docker volumes:

https://docs.docker.com/userguide/dockervolumes/

For example:

docker run -v /var/log/docker:/var/log your-image

will mount the log directory on your local file system. You can also get much fancier, creating containers just for data. It's all explained in the above link.