GitLab-CI: Cannot link to a non running container

Question

I've tried to get my setup work with gitlab-ci. I have a simple gitlab-ci.yml file

build_ubuntu:
  image: ubuntu:14.04
  services:
    - rikorose/gcc-cmake:gcc-5
  stage: build
  script:
    - apt-get update
    - apt-get install -y python3 build-essential curl
    - cmake --version
  tags:
    - linux

I want to get a ubuntu 14.04 LTS with gcc and cmake (apt-get version is to old) installed. If i use it locally (via docker --link command) everything works, but when the gitlab-ci-runner will process it i get the following waring (which is in my case an error)

Running with gitlab-ci-multi-runner 9.2.0 (adfc387)
on xubuntuci1 (19c6d3ce)
Using Docker executor with image ubuntu:14.04 ...
Starting service rikorose/gcc-cmake:gcc-5 ...
Pulling docker image rikorose/gcc-cmake:gcc-5 ...
Using docker image rikorose/gcc-cmake:gcc-5 
ID=sha256:ef2ac00b36e638897a2046c954e89ea953cfd5c257bf60103e32880e88299608 
for rikorose/gcc-cmake service...
Waiting for services to be up and running...

*** WARNING: Service runner-19c6d3ce-project-54-concurrent-0-rikorose__gcc-
cmake probably didn't start properly.

Error response from daemon: Cannot link to a non running container: /runner-
19c6d3ce-project-54-concurrent-0-rikorose__gcc-cmake AS /runner-19c6d3ce-
project-54-concurrent-0-rikorose__gcc-cmake-wait-for-service/runner-
19c6d3ce-project-54-concurrent-0-rikorose__gcc-cmake

Does anybody know how i can fix this?

Thanks in advance Tonka

Answer 1

You must start the gitlab-runner container with

--privileged true

but that is not enough. Any runner containers that are spun up by gitlab after registering need to be privileged too. So you need to mount the gitlab-runner

docker exec -it runner /bin/bash
nano /etc/gitlab-runner/config.toml

and change privileged flag from false into true:

privileged = true

That will solve the problem!