[backup] How can I backup a Docker-container with its data-volumes?

If you want a complete backup, you will need to perform a few steps:

  1. Commit the container to an image
  2. Save the image
  3. Backup the container's volume by creating a tar file of the volume's mount point in the container.
  4. Repeat steps 1-3 for the database container as well.

Note that doing just a Docker commit of the container to an image does NOT include volumes attached to the container (ref: Docker commit documentation).

"The commit operation will not include any data contained in volumes mounted inside the container."

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