Package: docker.io Version: 20.10.5+dfsg1-1+deb11u2 Severity: important Dear Maintainer,
Installing docker.io rendered my server inoperable. Solely as a result of "apt-get install docker.io", it installed iptables rules which corrupted the network configuration rendering the network unusable. Stopping docker with "systemctl docker stop" did not restore the network state to operability. Uninstalling docker with "dpkg --purge docker.io" did not restore the network state to operability. Manually removing the iptables rules docker installed did not restore the network state to operability. It was a server running lots of vms, so it was a pain to reboot -- the solution which finally restored the network function. The problem was successfully worked around by adding a line to /etc/default/docker: DOCKER_OPTS=--iptables=false Merely installing a software package SHOULD NOT render the network unusable. Suggested correction: Either add iptables=false as default, or do not immediately start docker upon installation so that merely installing docker does not change the network configuration on the machine. -- System Information: Debian Release: 11.6 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'stable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.19.261-deb11 (SMP w/40 CPU threads; PREEMPT) Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /bin/bash Init: systemd (via /run/systemd/system) Versions of packages docker.io depends on: ii adduser 3.118 ii containerd 1.4.13~ds1-1~deb11u3 ii init-system-helpers 1.60 ii iptables 1.8.7-1 ii libc6 2.31-13+deb11u5 ii libdevmapper1.02.1 2:1.02.175-2.1 ii libsystemd0 247.3-7+deb11u1 ii lsb-base 11.1.0 ii runc 1.0.0~rc93+ds1-5+deb11u2 ii tini 0.19.0-1 Versions of packages docker.io recommends: ii apparmor 2.13.6-10 ii ca-certificates 20210119 ii cgroupfs-mount 1.4 ii git 1:2.30.2-1+deb11u2 ii needrestart 3.5-4+deb11u2 ii xz-utils 5.2.5-2.1~deb11u1 Versions of packages docker.io suggests: pn aufs-tools <none> ii btrfs-progs 5.10.1-2 ii debootstrap 1.0.123+deb11u1 pn docker-doc <none> ii e2fsprogs 1.46.2-2 pn rinse <none> pn rootlesskit <none> ii xfsprogs 5.10.0-4 pn zfs-fuse | zfsutils-linux <none> -- Configuration Files: /etc/default/docker changed: DOCKER_OPTS=--iptables=false -- no debconf information
