apiVersion: addons.projectcapsule.dev/v1alpha1
kind: ChangeWindow
metadata:
  name: development-nights
spec:
  namespaceSelectors:
    - matchLabels:
        environment: development
  schedules:
    - name: nights
      cron: "0 19 * * 1-5"
      timeZone: Europe/Zurich
      duration: 12h
  targets:
    - name: apps
      apiVersion: apps/v1
      kind: Deployment
      selector:
        matchLabels:
          downscaling: enabled
  serviceAccount:
    namespace: schedule-action-controller-system
    name: change-window-executor
  actions:
    - name: downscale
      targets: [apps]
      capture:
        replicas:
          subresource: scale
          path: /spec/replicas
      onStart:
        apply:
          subresource: scale
          force: true
          template: |
            spec:
              replicas: 0
      onEnd:
        apply:
          subresource: scale
          template: |
            spec:
              replicas: {{ .captured.replicas }}
  admission:
    - name: freeze-scaling
      targets: [apps]
      operations: [UPDATE]
      subresources: ["", scale]
      when: Active
      audience:
        include:
          - kind: Group
            name: developers
      matchConditions:
        - name: replicas-changed
          expression: "object.spec.replicas != oldObject.spec.replicas"
      message: "Replica changes are frozen during maintenance."
  config:
    admission:
      warnings:
        - name: upcoming
          targets: [apps]
          operations: [CREATE, UPDATE, DELETE]
          subresources: ["", scale]
          when: BeforeStart
          within: 1h
          message: "Maintenance starts at {{ .window.start }}."