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DevOps · Concept

Runner

Actions Runner Controller (ARC) is a Kubernetes operator for GitHub Actions self-hosted runners. It creates runner scale sets that can add or remove temporary runner pods as workflow demand changes.

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Syntax

runs-on: <runner-scale-set-name-or-label>

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • AutoScalingRunnerSet
  • Runner ScaleSet Listener
  • EphemeralRunner Controller
  • runnerScaleSetName
  • runnerScaleSetLabels
  • self-hosted runners

Source: Actions Runner Controller - GitHub Docs. Checked 2026-11-03.