GitHub Actions Runner

Custom GitHub Actions runner images for Plyo.

Docker Images

Available images on Docker Hub: https://hub.docker.com/r/plyo/github-actions-runner/tags

Build Pipeline

The Docker build workflow runs two parallel jobs:

• build-arc-runners — Builds and pushes the main ARC runners image (Dockerfile.new)
• build-arc-runners-tests — Builds and pushes the tests image (Dockerfile.tests.new)

Both jobs run in parallel to reduce build time.

Kubernetes Deployment (plyo-infra repo)

The runners are deployed to Kubernetes clusters using Terraform. The deployment includes:

Namespaces

• arc-systems — Hosts the Actions Runner Controller
• arc-runners — Hosts the runner scale sets and secrets

Secrets

• github-app — GitHub App credentials (ID, installation ID, and private key)

Runner Scale Sets

Four different runner scale sets are deployed:

• arc-runners — Standard runners (uses arc-runners.yaml)
• arc-runners-dind — Runners with Docker-in-Docker support (uses arc-runners-dind.yaml)
• arc-runners-tests — Test runners (uses arc-runners-tests.yaml)
• arc-runners-tests-dind — Test runners with Docker-in-Docker (uses arc-runners-tests-dind.yaml)

All runners use the gha-runner-scale-set Helm chart and are configured via value files in the values/ directory.