Drone plugin for Helm 3

This plugin provides an interface between Drone and Helm 3:

• Lint your charts
• Deploy your service
• Delete your service

The plugin is inpsired by drone-helm, which fills the same role for Helm 2. It provides a comparable feature-set and the configuration settings are backwards-compatible.

Example configuration

The examples below give a minimal and sufficient configuration for each use-case. For a full description of each command's settings, see docs/parameter_reference.md.

Linting

steps:
  - name: lint
    image: pelotech/drone-helm3
    settings:
      helm_command: lint
      chart: ./

Installation

steps:
  - name: deploy
    image: pelotech/drone-helm3
    settings:
      helm_command: upgrade
      chart: ./
      release: my-project
    environment:
      API_SERVER: https://my.kubernetes.installation/clusters/a-1234
      KUBERNETES_TOKEN:
        from_secret: kubernetes_token

Uninstallation

steps:
  - name: uninstall
    image: pelotech/drone-helm3
    settings:
      helm_command: uninstall
      release: my-project
    environment:
      API_SERVER: https://my.kubernetes.installation/clusters/a-1234
      KUBERNETES_TOKEN:
        from_secret: kubernetes_token

Upgrading from drone-helm

drone-helm3 is largely backwards-compatible with drone-helm. There are some known differences:

• prefix must be supplied via the settings block, not environment.
• EKS is not supported. See #5 for more information.
• Several settings no longer have any effect:
  • purge -- this is the default behavior in Helm 3
  • recreate_pods
  • tiller_ns
  • upgrade
  • canary_image
  • client_only
  • stable_repo_url

Since helm 3 does not require Tiller, we also recommend switching to a service account with less-expansive permissions.