runner-deployment.yaml

# Self-hosted Github runner template
#
# You need to replace all values following the `<variable_name>` pattern
# see: 
#  - https://github.com/actions/actions-runner-controller/blob/master/docs/installing-arc.md
#  - https://github.com/actions/actions-runner-controller/blob/master/docs/authenticating-to-the-github-api.md#deploying-using-github-app-authentication
#  - https://github.com/actions/actions-runner-controller/blob/master/docs/deploying-arc-runners.md
---
apiVersion: v1
kind: Secret
metadata:
  name: <github_username>
stringData:
  github_app_id: '<github_app_id>'
  github_app_installation_id: '<github_app_installation_id>'
  github_app_private_key: |-
    <github_app_private_key>

---
apiVersion: actions.summerwind.dev/v1alpha1
kind: RunnerDeployment
metadata:
  name: <github_repository>
spec:
  template:
    spec:
      repository: <github_username>/<github_repository>
      githubAPICredentialsFrom:
        secretRef:
          name: <github_username>

---
apiVersion: actions.summerwind.dev/v1alpha1
kind: HorizontalRunnerAutoscaler
metadata:
  name: <github_repository>
spec:
  scaleDownDelaySecondsAfterScaleOut: 600
  githubAPICredentialsFrom:
    secretRef:
      name: <github_repository>
  scaleTargetRef:
    kind: RunnerDeployment
    name: <github_repository>
  minReplicas: 2
  maxReplicas: 4
  scaleUpTriggers:
  - githubEvent:
      workflowJob: {}
    duration: 30m
  # metrics:
  # - type: PercentageRunnersBusy
  #   scaleUpThreshold: '0.75'
  #   scaleDownThreshold: '0.25'
  #   scaleUpFactor: '2'
  #   scaleDownFactor: '0.5'