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description
| description |
|---|
| Flagger is an Istio progressive delivery Kubernetes operator |
Introduction
Flagger is a Kubernetes operator that automates the promotion of canary deployments using Istio routing for traffic shifting and Prometheus metrics for canary analysis.
Flagger implements a control loop that gradually shifts traffic to the canary while measuring key performance indicators like HTTP requests success rate, requests average duration and pods health. Based on the KPIs analysis a canary is promoted or aborted and the analysis result is published to Slack.
Flagger can be configured with Kubernetes custom resources (canaries.flagger.app kind) and is compatible with any CI/CD solutions made for Kubernetes. Since Flagger is declarative and reacts to Kubernetes events, it can be used in GitOps pipelines together with Weave Flux or JenkinsX.