Since gardener node agent, docker is not required anymore

[majst01]

Description

All our deployed clusters have gardener node agent instead of cloud-config-downloader. This removes the hard requirement for docker to make bootstrapping possible.

Install containerd only.

Closes: #106

[robertvolkmann]

You downgrade containerd from 1.7.22 to 1.6.20 because you switched from containerd.io (Docker repository) to containerd (Debian repository).

Reproduce by:

$ docker run -it debian:bookworm
$ apt update
$ apt install --yes ca-certificates curl gnupg2
$ curl -fLsS https://download.docker.com/linux/debian/gpg | apt-key add -
$ echo "deb [arch=amd64] https://download.docker.com/linux/debian bookworm stable" > /etc/apt/sources.list.d/docker.list
$ apt update
$ apt info containerd
Package: containerd
Version: 1.6.20~ds1-1+b1
$ apt info runc
Package: runc
Version: 1.1.5+ds1-1+deb12u1
$ apt info docker-ce
Package: docker-ce
Version: 5:27.3.1-1~debian.12~bookworm
Priority: optional
Section: admin
Maintainer: Docker <support@docker.com>
Installed-Size: 111 MB
Depends: containerd.io (>= 1.6.24), docker-ce-cli, iptables, libseccomp2 (>= 2.3.0), libc6 (>= 2.34), libsystemd0
Recommends: apparmor, ca-certificates, docker-ce-rootless-extras, git, libltdl7, pigz, procps, xz-utils
Suggests: aufs-tools, cgroupfs-mount | cgroup-lite
$ apt info containerd.io
Package: containerd.io
Version: 1.7.22-1

[robertvolkmann]

Similar situation with Ubuntu:

$ docker run -it ubuntu:24.04
$ apt update
$ apt install --yes ca-certificates curl gnupg2
$ curl -fLsS https://download.docker.com/linux/ubuntu/gpg | apt-key add -
$ echo "deb [arch=amd64] https://download.docker.com/linux/ubuntu noble stable" > /etc/apt/sources.list.d/docker.list
$ apt update
$ apt info containerd
Package: containerd
Version: 1.7.12-0ubuntu4.1
$ apt info runc
Package: runc
Version: 1.1.12-0ubuntu3.1
$ apt info docker-ce
Package: docker-ce
Version: 5:27.3.1-1~ubuntu.24.04~noble
Priority: optional
Section: admin
Maintainer: Docker <support@docker.com>
Installed-Size: 111 MB
Depends: containerd.io (>= 1.6.24), docker-ce-cli, iptables, libseccomp2 (>= 2.3.0), libc6 (>= 2.34), libsystemd0
Recommends: apparmor, ca-certificates, docker-ce-rootless-extras, git, libltdl7, pigz, procps, xz-utils
Suggests: aufs-tools, cgroupfs-mount | cgroup-lite
$ apt info containerd.io
Package: containerd.io
Version: 1.7.22-1

[majst01]

Uuh, nice finding, will fix it thanks

[majst01]

You downgrade containerd from 1.7.22 to 1.6.20 because you switched from containerd.io (Docker repository) to containerd (Debian repository).

Reproduce by:

$ docker run -it debian:bookworm
$ apt update
$ apt install --yes ca-certificates curl gnupg2
$ curl -fLsS https://download.docker.com/linux/debian/gpg | apt-key add -
$ echo "deb [arch=amd64] https://download.docker.com/linux/debian bookworm stable" > /etc/apt/sources.list.d/docker.list
$ apt update
$ apt info containerd
Package: containerd
Version: 1.6.20~ds1-1+b1
$ apt info runc
Package: runc
Version: 1.1.5+ds1-1+deb12u1
$ apt info docker-ce
Package: docker-ce
Version: 5:27.3.1-1~debian.12~bookworm
Priority: optional
Section: admin
Maintainer: Docker <support@docker.com>
Installed-Size: 111 MB
Depends: containerd.io (>= 1.6.24), docker-ce-cli, iptables, libseccomp2 (>= 2.3.0), libc6 (>= 2.34), libsystemd0
Recommends: apparmor, ca-certificates, docker-ce-rootless-extras, git, libltdl7, pigz, procps, xz-utils
Suggests: aufs-tools, cgroupfs-mount | cgroup-lite
$ apt info containerd.io
Package: containerd.io
Version: 1.7.22-1

fixed now:

containerd --version
containerd containerd.io 1.7.22 7f7fdf5fed64eb6a7caf99b3e12efcf9d60e311c

Switched to containerd.io