Data is lost when a postgres container is commit has a new image.

[cbadillac]

When I commit a container as a new image, and then I run this new image, all data that I saved in the original container are lost/erased.

How can I commit a container without to loss all data?

[wglambert]

Are you not mounting volumes?

If so, then you're looking to mount a volume for this https://github.com/docker-library/docs/tree/master/postgres#pgdata

Containers have a read/write layer that is temporary, when the container is 'stopped' it will retain data in that layer, when it's removed and started back up; you're doing so from the image which hasn't been modified. So you'd want volumes mounted from the host onto the container.

Given that the issue is more of a usability question, it would be more suited for the Docker Community Forums, the Docker Community Slack, or Stack Overflow.

[yosifkit]

Duplicate of #375,