Docker Container Time How To Solve This

Using -v etclocaltime:etclocaltime:ro (CentOS) sort of works.

Inside container command-line date returns date in the expected timezone format.

Why etclocaltime is a symlink to.usrsharezoneinfoUTC in built container.

The content of the UTC file in container is now the new timezone.

Apologies, this is jenkins specific but hopefully useful for some other jenkins users.

So it is possible to do this entirely from your Dockerfile.

RUN ln -snf usrsharezoneinfoTZ etclocaltime echo TZ etctimezone.

You can provide it in any other way you would ordinarily provide environment variables, such as the command line, docker-compose.yml, etc.

Take care that some base image, like ubuntu:16.04, does not have the tzdata package which should be added in Dockerfile.

Alpine image does require installation of tzdata package, which is preferred over harcoding configurations at build time unless the extra 3MB image payload cannot be tolerated:).

Not sure if High Sierra or a docker change caused this: docker: Error response from daemon: Mounts denied: The path etclocaltime is not shared from OS X and is not known to Docker.

You can configure shared paths from Docker - Preferences.

File Sharing. See docs.docker.comdocker-for-macosxfsnamespaces for more info.

Not to mention that youd mix the db file from the host with the one in the container.

That way you are using leaves it as the default value etcUTC.

RUN mkdir -p configetc mv etctimezone configetc ln -s configetctimezone etc.

Docker Container Time How To Solve This

This seems like such a convoluted mess, so I did some testing on my own idea of how to solve this and it seems to work great.

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