[tech] Purge docker from motsugo?

[Nick Bannon]

docker's been hanging around on motsugo since before we had Proxmox,
and been mostly idle. (and more recently, broken?)

motsugo# docker ps
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is
the docker daemon running?

It shows up as one of the (several!) things failing and holding up motsugo
at boot time on the console (and `systemd-analyze blame`), and is one
of the reasons we have a more than the ideal number of upgrade-risking
extra repos ( /etc/apt/sources.list.d/docker.list ) even though any actual
functionality we could use is almost certainly in Debian main by now.

Anything here worth keeping?

# ls /var/lib/docker/containers/
12ff4da646f72cf7c4e1c238ae83f532fd99674c7b5f2a22a9e81af1e137d155
5d9c5f2a51655affe0ff981068c4e0523ae780405a5f49cd284821bde916dc65
6d050e60850bf443b6c69e6d32f7e25b8fae27a43c6e374b8d02453ad8d8c93f
8cfc511908a9d6f3011ea7f2ff47f5dee4ca9006ada39c576dd0c21e12f63178
b94c88c7b8980cee0766577e90530885f7489966c387f31b8ef113fade90963d
d1d3a574a02cb19a4379b5cec3c393271537c2825162188363e5cf6e596e4ee9

cockpit, maybe? but I suspect it may be better to use/repair/enhance
netdata and prometheus/grafana.

$ dpkg --get-selections |grep -i docker
docker-buildx-plugin                            install
docker-ce                                       install
docker-ce-cli                                   install
docker-ce-rootless-extras                       install
docker-compose-plugin                           install
docker-scan-plugin                              install
docker.io                                       deinstall
golang-docker-credential-helpers                install
python3-docker                                  install
python3-dockerpty                               install
python3-dockerpycreds                           install

Nick.

-- 
   Nick Bannon   | "I made this letter longer than usual because
nick-sig at rcpt.to | I lack the time to make it shorter." - Pascal