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flux2/docs/components/helm/controller.md
stefanprodan 24418370f1 Add helm-controller docs
2020-07-14 09:33:52 +03:00

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Helm Controller

The Helm Controller is a Kubernetes operator, allowing one to declaratively manage Helm chart releases with Kubernetes manifests.

The desired state of a Helm release is described through a Kubernetes Custom Resource named HelmRelease. Based on the creation, mutation or removal of a HelmRelease resource in the cluster, Helm actions are performed by the controller.

Features:

  • Watches for HelmRelease objects and generates HelmChart objects
  • Fetches artifacts produced by source-controller from HelmChart objects
  • Watches HelmChart objects for revision changes (semver ranges)
  • Performs Helm v3 actions including Helm tests as configured in the HelmRelease objects
  • Runs Helm install/upgrade in a specific order, taking into account the depends-on relationship
  • Prunes Helm releases removed from cluster (garbage collection)
  • Reports Helm releases status (alerting provided by notification-controller)

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