Package: docker.io Version: 1.8.3~ds1-2 Severity: normal Dear Maintainer,
When trying to install docker, if the group "docker" already exists, apt fails with the following error: $ sudo apt install docker.io Reading package lists... Done Building dependency tree Reading state information... Done docker.io is already the newest version (1.8.3~ds1-2). 0 upgraded, 0 newly installed, 0 to remove and 84 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue? [Y/n] Setting up docker.io (1.8.3~ds1-2) ... addgroup: The group `docker' already exists as a system group. Exiting. Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details. invoke-rc.d: initscript docker, action "start" failed. 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) Instead, I would have expected instead apt to ignore the return code of addgroup and proceed. Note: Docker was probably already installed in this system and later removed. -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (800, 'testing') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.5.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/bash Init: systemd (via /run/systemd/system) Versions of packages docker.io depends on: ii adduser 3.114 ii init-system-helpers 1.29 ii iptables 1.6.0-2 ii libapparmor1 2.10-4 ii libc6 2.22-7 ii libdevmapper1.02.1 2:1.02.122-1 ii libsqlite3-0 3.12.2-1 ii perl 5.22.1-10 Versions of packages docker.io recommends: ii ca-certificates 20160104 ii cgroupfs-mount 1.2 ii git 1:2.8.1-1 ii xz-utils 5.1.1alpha+20120614-2.1 Versions of packages docker.io suggests: pn aufs-tools <none> pn btrfs-tools <none> ii debootstrap 1.0.80 pn lxc <none> pn rinse <none> pn zfs-fuse | zfsutils <none> -- no debconf information
