Can't get gitlab CI/runner to work

How to Use GitLab
1

Hey.

Somehow I can’t get GitLab CI to work. Just installed gitlab runner and no builds are starting. It’s a self-hosted installation.

When running gitlab-runner --debug run, it only reports:

Checking for builds... nothing                      runner=d99e4559
Feeding runners to channel                          builds=0
Checking for builds... nothing                      runner=d99e4559
Feeding runners to channel                          builds=0
Checking for builds... nothing                      runner=d99e4559

This never changes. /var/log/gitlab/nginx/gitlab_access.log contains:

XX.XX.XX.XX  - - [07/Nov/2016:19:10:48 +0000] "POST /ci/api/v1/builds/register.json HTTP/1.1" 204 0 "-" "gitlab-ci-multi-runner 1.7.1 (1-7-stable; go1.7.3; linux/amd64)"
XX.XX.XX.XX - - [07/Nov/2016:19:10:51 +0000] "POST /ci/api/v1/builds/register.json HTTP/1.1" 204 0 "-" "gitlab-ci-multi-runner 1.7.1 (1-7-stable; go1.7.3; linux/amd64)"

So apparently builds don’t get reported to the runner. I just can’t figure out why. The runner is correctly configured in Gitlab. It doesn’t matter whether I configure it to be shared or specific (enabled the project of course).

Used GitLab Runner version:

Version:      1.7.1
Git revision: f896af7
Git branch:   1-7-stable
GO version:   go1.7.3
Built:        Tue, 25 Oct 2016 16:57:56 +0000
OS/Arch:      linux/amd64

Any ideas?