runs-on is too strict in workflow files

[RJWadley]

Area with issue?

JSON Schema

✔️ Expected Behavior

runs-on should accept any valid label, or any valid list of labels without requiring the 'self-hosted' label

❌ Actual Behavior

Thanks to GitHubs new larger runners feature, github-hosted runners can now be given any custom label.

When using this custom label to refer in runs-on in a workflow syntax the schema insists I add "self-hosted" to the list of labels. This, while correct in the past, would no longer address the correct runner. As far as I can tell, there currently is no way to address a specific larger runner within the bounds of the schema.

Documentation for this is available here: https://docs.github.com/en/actions/using-github-hosted-runners/using-larger-runners#using-labels-to-control-where-jobs-are-run

YAML or JSON file that does not work.

# in this example, a github-hosted runner has been created with the label 'example-runner-label' 

name: Hello World
on: [push]
jobs: 
  hello_world_job:
    runs-on: example-runner-label
    steps:
      - name: Hello world action step
        run: echo "Hello World"

IDE or code editor.

No response

Are you making a PR for this?

No, someone else must create the PR.

[GerryFerdinandus]

The schema enforce the recommendation self-hosted label as described in the documentation.
Nothing wrong with enforcing the recommendation/best practice

What's wrong here is that the present schema lacks support for group: and labels:

name: learn-github-actions
on: [push]
jobs:
  check-bats-version:
    runs-on:
      group: ubuntu-runners
      labels: ubuntu-20.04-16core
    steps:
      - uses: actions/checkout@v3

Or list of labels

runs-on:
  group: my-group
  labels: [ self-hosted, label-1 ]

[AndrewGable]

Echoing @RJWadley - It seems like this should be valid:

jobs:
  e2e-tests:
    name: "Run e2e performance regression tests"
    runs-on: ubuntu-20.04-64core

ubuntu-20.04-64core is a custom name for a large runner.

[aktech]

By the way, if you want a no-maintenance method to achieve that, you can use cirun.io for the same.