mirror of
https://github.com/funkypenguin/geek-cookbook/
synced 2025-12-13 09:46:23 +00:00
103 lines
3.8 KiB
Markdown
103 lines
3.8 KiB
Markdown
# Gitlab Runner
|
|
|
|
Some features of GitLab require a "[runner](https://docs.gitlab.com/runner/)" (_in the sense of a "gopher" or a "minion"_). A runner "registers" itself with a GitLab instance, and is given tasks to run. Tasks include running Continuous Integration (CI) builds, and building container images.
|
|
|
|
While a runner isn't strictly required to use GitLab, if you want to do CI, you'll need at least one. There are many ways to deploy a runner - this recipe focuses on the docker container model.
|
|
|
|
## Ingredients
|
|
|
|
1. [Docker swarm cluster](/ha-docker-swarm/design/) with [persistent shared storage](/ha-docker-swarm/shared-storage-ceph.md)
|
|
2. [GitLab](/ha-docker-swarm/gitlab) installation (see previous recipe)
|
|
|
|
## Preparation
|
|
|
|
### Setup data locations
|
|
|
|
We'll need several directories to bind-mount into our runner containers, so create them in /var/data/gitlab:
|
|
|
|
```
|
|
cd /var/data
|
|
mkdir gitlab
|
|
cd gitlab
|
|
mkdir -p {runners/1,runners/2}
|
|
```
|
|
|
|
### Setup Docker Swarm
|
|
|
|
Create a docker swarm config file in docker-compose syntax (v3), something like this:
|
|
|
|
!!! tip
|
|
I share (_with my [patreon patrons](https://www.patreon.com/funkypenguin)_) a private "_premix_" git repository, which includes necessary docker-compose and env files for all published recipes. This means that patrons can launch any recipe with just a ```git pull``` and a ```docker stack deploy``` 👍
|
|
|
|
```
|
|
version: '3'
|
|
|
|
services:
|
|
thing1:
|
|
image: gitlab/gitlab-runner
|
|
volumes:
|
|
- /var/data/gitlab/runners/1:/etc/gitlab-runner
|
|
networks:
|
|
- internal
|
|
|
|
thing2:
|
|
image: gitlab/gitlab-runner
|
|
volumes:
|
|
- /var/data/gitlab/runners/2:/etc/gitlab-runner
|
|
networks:
|
|
- internal
|
|
|
|
networks:
|
|
internal:
|
|
driver: overlay
|
|
ipam:
|
|
config:
|
|
- subnet: 172.16.23.0/24
|
|
```
|
|
|
|
|
|
### Configure runners
|
|
|
|
From your GitLab UI, you can retrieve a "token" necessary to register a new runner. To register the runner, you can either create config.toml in each runner's bind-mounted folder (example below), or just "docker exec" into each runner container and execute ```gitlab-runner register``` to interactively generate config.toml.
|
|
|
|
Sample runner config.toml:
|
|
|
|
```
|
|
concurrent = 1
|
|
check_interval = 0
|
|
|
|
[[runners]]
|
|
name = "myrunner1"
|
|
url = "https://gitlab.example.com"
|
|
token = "<long string here>"
|
|
executor = "docker"
|
|
[runners.docker]
|
|
tls_verify = false
|
|
image = "ruby:2.1"
|
|
privileged = false
|
|
disable_cache = false
|
|
volumes = ["/cache"]
|
|
shm_size = 0
|
|
[runners.cache]
|
|
```
|
|
|
|
## Serving
|
|
|
|
### Launch runners
|
|
|
|
Launch the mail server stack by running ```docker stack deploy gitlab-runner -c <path -to-docker-compose.yml>```
|
|
|
|
Log into your new instance at https://**YOUR-FQDN**, with user "root" and the password you specified in gitlab.env.
|
|
|
|
## Chef's Notes
|
|
|
|
1. You'll note that I setup 2 runners. One is locked to a single project (this cookbook build), and the other is a shared runner. I wanted to ensure that one runner was always available to run CI for this project, even if I'd tied up another runner on something heavy-duty, like a container build. Customize this to your use case.
|
|
2. Originally I deployed runners in the same stack as GitLab, but I found that they would frequently fail to start properly when I launched the stack. I think that this was because the runners started so quickly (and GitLab starts so slowly!), that they always started up reporting that the GitLab instance was invalid or unavailable. I had issues with CI builds stuck permanently in a "pending" state, which were only resolved by restarting the runner. Having the runners deployed in a separate stack to GitLab avoids this problem.
|
|
|
|
|
|
### Tip your waiter (donate) 👏
|
|
|
|
Did you receive excellent service? Want to make your waiter happy? (_..and support development of current and future recipes!_) See the [support](/support/) page for (_free or paid)_ ways to say thank you! 👏
|
|
|
|
### Your comments? 💬
|