Commit a5335ad7 authored by Jason Yavorska's avatar Jason Yavorska Committed by Marcel Amirault

Add Agents vs. Runners docs

Add notes on shared fleet

Apply suggestion to doc/ci/jenkins/index.md

Make gitlab.com code to get past linter

Apply suggestion to doc/ci/jenkins/index.md

Add Agents vs. Runners docs

Add notes on shared fleet

Apply suggestion to doc/ci/jenkins/index.md

Make gitlab.com code to get past linter

Apply suggestion to doc/ci/jenkins/index.md

Remove duplicated section

Curse this linter

Apply suggestion to doc/ci/jenkins/index.md

Apply suggestion to doc/ci/jenkins/index.md
parent c925fbfd
...@@ -83,6 +83,29 @@ There are some high level differences between the products worth mentioning: ...@@ -83,6 +83,29 @@ There are some high level differences between the products worth mentioning:
own environment, which will be slower and may be less consistent. We have extensive docs on [how to use the Container Registry](../../user/packages/container_registry/index.md). own environment, which will be slower and may be less consistent. We have extensive docs on [how to use the Container Registry](../../user/packages/container_registry/index.md).
- Totally stuck and not sure where to turn for advice? The [GitLab community forum](https://forum.gitlab.com/) can be a great resource. - Totally stuck and not sure where to turn for advice? The [GitLab community forum](https://forum.gitlab.com/) can be a great resource.
## Agents vs. Runners
Both Jenkins agents and GitLab Runners are the hosts that run jobs. To convert the
Jenkins agent, simply uninstall it and then [install and register the runner](../runners/README.md).
Runners do not require much overhead, so you can size them similarly to the Jenkins
agents you were using.
There are some important differences in the way Runners work in comparison to agents:
- Runners can be set up as [shared across an instance, be added at the group level, or set up at the project level](../runners/README.md#shared-specific-and-group-runners).
They will self-select jobs from the scopes you've defined automatically.
- You can also [use tags](../runners/README.md#using-tags) for finer control, and
associate runners with specific jobs. For example, you can use a tag for jobs that
require dedicated, more powerful, or specific hardware.
- GitLab has [autoscaling for Runners](https://docs.gitlab.com/runner/configuration/autoscale.html)
which will let configure them to be provisioned as needed, and scaled down when not.
This is similar to ephemeral agents in Jenkins.
If you are using `gitlab.com`, you can take advantage of our [shared Runner fleet](../../user/gitlab_com/index.md#shared-runners)
to run jobs without provisioning your own Runners. We are investigating making them
[available for self-managed instances](https://gitlab.com/gitlab-org/customers-gitlab-com/issues/414)
as well.
## Groovy vs. YAML ## Groovy vs. YAML
Jenkins Pipelines are based on [Groovy](https://groovy-lang.org/), so the pipeline specification is written as code. Jenkins Pipelines are based on [Groovy](https://groovy-lang.org/), so the pipeline specification is written as code.
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