Tag: docker

Posted on

GitLab Runner unable to run Docker commands

I have a GitLab Runner using a Shell Executor that needs to build a Docker container. When it executes the first Docker command it gets this error:

docker.errors.DockerException: Error while fetching server API version: ('Connection aborted.', PermissionError(13, 'Permission denied'))

If I logon as the gitlab-runnner user and try to execute docker commands manually I get this error:

$ docker ps
permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.47/containers/json": dial unix /var/run/docker.sock: connect: permission denied

A quick Google and I need to add the gitlab-runner to the Docker group to grant it permission to execute Docker:

sudo usermod -a -G docker $USER
Posted on

GitLab – no runners for project

Setting up a new self-hosted GitLab, the pipeline for my project is stuck with this error:

… which looks like there are no runners available for the project. I know I have a runner available because I set one up yesterday, so taking a closer look.

In the CI/CD settings for my project, I think I see my shared runner:

Looking in the admin settings, it looks like when I set it up I used the tag ‘shared’:

The error says ‘no runners match all of the job’s tags: docker-test’, so I think what I need to do is change the tags on my runner to match. I edited the tags to remove ‘shared’ and replaced with ‘docker-test’ and now the job starts running! On to the next errors!

Posted on

Docker build fails during ‘apt-get install’ with 404 errors

While running ‘docker build’ for a new image using ubuntu:22.04 as the base, running apt-get install for certain packages is giving random 404s on some package dependencies.

For example:

#7 7.691 Err:1 http://ports.ubuntu.com/ubuntu-ports jammy-updates/main arm64 libpython3.10-minimal arm64 3.10.12-1~22.04.5
#7 7.691   404  Not Found [IP: 185.125.190.36 80]

If I run ubuntu:22.04 and then run the ‘apt-get install’ steps manually, they run as expected.

This post here has some tips that previously cached layers when building the image may be causing this, and to run ‘docker build –no-cache’ to avoid using the previously cached layers. Fixed!

Posted on

Setting user prompted values during apt-get install (e.g. tzdata)

Installing php-fpm on Ubuntu 22:04 prompts for some timezone values during install which makes it more difficult to install during a ‘docker build’ since passing -y to apt-get-install is not enough to respond to the prompts.

Here’s what I’m prompted for if I just run ‘apt-get install php-fpm’:

Configuring tzdata
------------------

Please select the geographic area in which you live. Subsequent configuration
questions will narrow this down by presenting a list of cities, representing
the time zones in which they are located.

  1. Africa   3. Antarctica  5. Arctic  7. Atlantic  9. Indian    11. US
  2. America  4. Australia   6. Asia    8. Europe    10. Pacific  12. Etc
Geographic area: 8

Please select the city or region corresponding to your time zone.

  1. Amsterdam    17. Guernsey     33. Monaco      49. Stockholm
  2. Andorra      18. Helsinki     34. Moscow      50. Tallinn
  3. Astrakhan    19. Isle_of_Man  35. Nicosia     51. Tirane
  4. Athens       20. Istanbul     36. Oslo        52. Tiraspol
  5. Belfast      21. Jersey       37. Paris       53. Ulyanovsk
  6. Belgrade     22. Kaliningrad  38. Podgorica   54. Uzhgorod
  7. Berlin       23. Kirov        39. Prague      55. Vaduz
  8. Bratislava   24. Kyiv         40. Riga        56. Vatican
  9. Brussels     25. Lisbon       41. Rome        57. Vienna
  10. Bucharest   26. Ljubljana    42. Samara      58. Vilnius
  11. Budapest    27. London       43. San_Marino  59. Volgograd
  12. Busingen    28. Luxembourg   44. Sarajevo    60. Warsaw
  13. Chisinau    29. Madrid       45. Saratov     61. Zagreb
  14. Copenhagen  30. Malta        46. Simferopol  62. Zaporozhye
  15. Dublin      31. Mariehamn    47. Skopje      63. Zurich
  16. Gibraltar   32. Minsk        48. Sofia
Time zone: 27


Current default time zone: 'Europe/London'
Local time is now:      Tue Sep 24 16:39:08 BST 2024.
Universal Time is now:  Tue Sep 24 15:39:08 UTC 2024.
Run 'dpkg-reconfigure tzdata' if you wish to change it.

From answers on this post, the easiest option (rather than setting values for the prompted values) is to run in non-interactive mode, and just default the tz to UTC, with:

DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get install php-fpm

Proudly powered by WordPress