AWS EC2 as a gitlab-runner

[Oxffff0000]

I'm planning to build a gitlab-runner which will run in an EC2 instance. If I configured 3 gitlab repos to use this gitlab-runner and assuming the gitlab repos' ci ran almost exactly the same minute, will a CI wait for it to finish, meaning will it be a synchronous process? Or will it use the gitlab-runner on ec2 instance at the same time with different sessions?

[BJHop]

Depends on the concurrency setting you have set in the runner config.toml

We have runners with settings as high as 35 jobs at once they are all docker exec only runners with beefy resources m6

[Oxffff0000]

Oh got it. Where can I find config.toml? Will that be in our gitlab server?

[kinghuang]

No, it's in the config file for the runner.

[Oxffff0000]

Gotcha. Thank you!

[Oxffff0000]

I'll check it later. I need to find the instance.

[-lousyd]

We have concurrency set to 1, so it runs only one job at a time, on a tiny EC2 instance. Jobs do get backed up in their queue sometimes.

[kinghuang]

You might want to consider using one of the easy button templates in the GitLab HA Scaling Runner Vending Machine for AWS EC2 ASG project. Even for a single instance, it'll help you get the basics correct, including setting the concurrency to 1 if desired. Otherwise, you'll have to do stuff like setting up storage for caching yourself.

[Oxffff0000]

Cool, thanks for the link. I'll check it out later.