If you use Docker containers, and who doesn’t these times, you need to take care that Docker does not accumulate a lot of cruft.
remains of docker run
If you start a container via docker run,
and without the highly recommended option --rm,
the exited Docker container will still leave some remains on your system.
In my case oO…
❯ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c14c0bd0d850 jetbrains/youtrack:2020.3.12000 "/bin/bash /run.sh" 6 months ago Exited (0) 6 months ago youtrack
81aa523801b4 python:3.8-slim-buster "python3" 7 months ago Exited (0) 7 months ago intelligent_nobel
319b210462b7 python:3.8-slim-buster "python3" 7 months ago Exited (0) 7 months ago happy_wilbur
7eca121738aa positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-4.0p1…" 7 months ago Exited (255) 7 months ago relaxed_chaplygin
66d7a0c97f87 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-4.0p1…" 7 months ago Exited (255) 7 months ago jovial_williamson
7c4fb679cf7e positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-4.0p1…" 7 months ago Exited (255) 7 months ago amazing_franklin
ae4d0d88a412 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-8.0p1…" 7 months ago Exited (0) 7 months ago kind_einstein
0f678273bd4e positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-8.0p1…" 7 months ago Exited (0) 7 months ago awesome_khorana
327facd36000 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-8.0p1…" 7 months ago Exited (0) 7 months ago friendly_goldberg
f5ed4e767ece positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-8.0p1…" 7 months ago Exited (0) 7 months ago friendly_kowalevski
0b8fc88d22f1 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago hopeful_chaplygin
e4c1688e9863 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago wonderful_napier
60da4fd07a85 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago ecstatic_bohr
3ef736caa432 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago lucid_pare
f7a53057535a positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-8.0p1…" 7 months ago Exited (0) 7 months ago gallant_ritchie
f0a2a4733984 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago elastic_villani
9232a99320d9 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago goofy_johnson
4f6d726e1ca1 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago magical_shtern
856296da2b4a positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago laughing_cannon
20f7eda16e9d positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago intelligent_chaplygin
d3d244294e49 positronsecurity/ssh-audit-test-framework:3 "/usr/bin/tcpserver …" 7 months ago Exited (0) 7 months ago admiring_greider
d9a66f1961a8 positronsecurity/ssh-audit-test-framework:3 "/dropbear/dropbear-…" 7 months ago Exited (1) 7 months ago beautiful_benz
5ed520b3399b positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-8.0p1…" 7 months ago Exited (0) 7 months ago confident_bohr
843f75aa7d83 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-8.0p1…" 7 months ago Exited (0) 7 months ago upbeat_shaw
865ec1914303 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-8.0p1…" 7 months ago Exited (0) 7 months ago blissful_montalcini
bd20edc7842c positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago funny_kirch
03e92fe5df44 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago sharp_poincare
9670da0dba75 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago eager_elgamal
df9f2f1b0e10 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago happy_keldysh
506207c05a27 positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-5.6p1…" 7 months ago Exited (255) 7 months ago priceless_cartwright
bb3bccbef26a positronsecurity/ssh-audit-test-framework:3 "/openssh/sshd-4.0p1…" 7 months ago Exited (255) 7 months ago relaxed_shirley
25d1ac6f3d85 odoo "/entrypoint.sh odoo" 7 months ago Exited (0) 7 months ago odoo
af28c470db77 postgres:10 "docker-entrypoint.s…" 7 months ago Exited (0) 7 months ago db
a6d8dfc2b2ad plone "/docker-entrypoint.…" 15 months ago Exited (0) 15 months ago ppp
4ad4fd1802e2 plone "/docker-entrypoint.…" 15 months ago Exited (0) 15 months ago youthful_hoover
97deaec9f63e plone "/docker-entrypoint.…" 15 months ago Created objective_rubin
c5b24788ce3f plone "/docker-entrypoint.…" 15 months ago Exited (0) 15 months ago brave_newton
This cruft and much more can be cleaned up by running…
❯ docker system prune
WARNING! This will remove:
- all stopped containers
- all networks not used by at least one container
- all dangling images
- all dangling build cache
Are you sure you want to continue? [y/N]
old images
Do you always delete a Docker image when you do not need it any more?
It seems that I don’t do this!
❯ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
redis latest de974760ddb2 3 weeks ago 105MB
adminer latest 211f88f2c454 3 months ago 89.7MB
postgres 13.1 4ea2949e4cb8 3 months ago 314MB
shopyo latest be9ba0472b07 5 months ago 880MB
ubuntu latest f643c72bc252 5 months ago 72.9MB
jetbrains/youtrack 2020.3.12000 c5c1a2632420 7 months ago 596MB
python 3.8-slim-buster 62297c9f4e5c 7 months ago 113MB
postgres 10 e8abca8f194e 7 months ago 200MB
odoo latest f018911ebd84 7 months ago 1.2GB
plone latest bfe83a632704 15 months ago 619MB
jetblackpope/pybuntu 1.6.1-disco f208c0abcd07 18 months ago 94.7MB
positronsecurity/ssh-audit-test-framework 3 66b1bd47c052 20 months ago 190MB
alpine latest 055936d39205 24 months ago 5.53MB
danlynn/bat latest 0bfded85e55c 2 years ago 238MB
quay.io/python-devs/ci-image latest e4147b2d6ddc 2 years ago 1.67GB
python 3.5.1 a00e9008965a 4 years ago 698MB
python 3.5.0 de8fe124331e 5 years ago 689MB
I can’t even remember what for I used all those images, except Python 3.5, which I used to reproduce a problem reported on StackOverflow.
You can delete unused images with docker image rm <image name>.
e.g. docker image rm redis
thanks
I learned the first “trick” by one of Anthony’s videos.
Once more, thank you very much, Anthony!