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Flagger v1 - General Availability Release

I am thrilled to announce the v1.0.0 General Availability (GA) release of Flagger, the Progressive Deliver Operator for Kubernetes.

Thanks to all users who helped us in the past three months testing the release candidates.


After two years of development and in collaboration with the Cloud Native community, Flagger goes GA with builtin support for Istio, Linkerd, App Mesh, Gloo, Contour and NGINX Ingress.

Stable Kubernetes APIs

  • Canary CRD for configuring progressive traffic shifting, A/B testing and Blue/Green deployment.
  • MetricTemplate CRD for defining SLOs based on Prometheus, Datadog and AWS CloudWatch metrics.
  • AlertProvider CRD for configuring alerting on a per-canary basis for Slack, MS Teams, Discord and Rocket.

Flagger was designed to give developers confidence in automating production releases with progressive delivery techniques. It is made to reduce the risk of introducing a new software version in production by gradually shifting traffic to the new version while measuring metrics like HTTP/gRPC request success rate and latency.

Flagger is compatible with CI/CD solutions made for Kubernetes and due to its declarative APIs, it can be used in GitOps pipelines together with tools like Flux.

To find out more please visit