Actions Runner Controller release 0.15.0

What Actions Runner Controller shipped

Back to changelog GitHub Actions Runner Controller 0.15.0 includes reliability, scalability, and observability improvements for runner scale sets. These updates help you operate larger runner fleets with fewer disruptions during upgrades and Kubernetes API updates.

Here’s what’s now available: Patch version upgrades now update resources in place, reducing disruption between autoscaling runner sets and ephemeral runner sets. Controller shutdown behavior is more reliable because terminationGracePeriodSeconds is configurable and now aligns with the controller manager graceful shutdown timeout.

What changed for builders in Actions Runner Controller

Runner scale sets can be reregistered when the recorded scale set no longer exists in the Actions service. See the full write-up from GitHub Changelog via the source link for quotes and complete context.

How to install or upgrade Actions Runner Controller

Controller updates now use patch requests instead of full update requests, reducing Kubernetes API payload size. Runner status aggregation has moved to metrics for EphemeralRunnerSet and AutoscalingRunnerSet, reducing status patch requests.

Gotchas and compatibility in Actions Runner Controller

Listener Kubernetes client rate limits are configurable through QPS and burst settings. Controller concurrency can now be configured globally and per controller with max-concurrent-reconciles flags.

What to watch after Actions Runner Controller

Controllers now filter incoming events so they perform fewer reconciliations than before. See the full write-up from GitHub Changelog via the source link for quotes and complete context.