Public bug reported: When installing the docker.io package, it fails during installation with a message akin to the following:
stderr: addgroup: The group `docker' already exists and is not a system group. Exiting. dpkg: error processing package docker.io (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: docker.io E: Sub-process /usr/bin/dpkg returned an error code (1) This was originally discovered during charm development where a user can switch from the canonical docker package to the docker maintained package 'lxc-docker'. With the upstream package, they are not maintaining a docker-group in the charm, and allows for installation regardless of the presence of the group. While the docker.io package will halt installation in a panic if it exists - regardless if its a system group or not. Just the presence alone appears to be the key factor in the failure. I don't think this behavior is correct - as a user may have created a docker group themselves, and expect to install the docker.io package from the repository after removing the latest - due to a bug or any number of reasons. I'm linking the commit to the charm and the user stack trace for additional validation/investigation if required: https://github.com/chuckbutler/docker- charm/commit/59946a7bd6bfa3cc050de3b27e62d3207c71be47 https://gist.github.com/slatunje/735e1e5132de02a3ad1d ** Affects: docker.io (Ubuntu) Importance: Undecided Status: New ** Tags: papercut -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to docker.io in Ubuntu. https://bugs.launchpad.net/bugs/1407841 Title: docker.io package fails install if docker group is pre-existing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/docker.io/+bug/1407841/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
