ArgoCD - custom action on deployment

argocd-cm.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  labels:
    app.kubernetes.io/component: server
    app.kubernetes.io/name: argocd-cm
    app.kubernetes.io/part-of: argocd
  name: argocd-cm
  namespace: argocd
data:
  resource.customizations.actions.apps_Deployment: |
    discovery.lua: |
      actions = {}
      actions["restart-100%-in-1-batch"] = {}
      return actions
    
    definitions:
      - name: restart-100%-in-1-batch
        action.lua: |
          local os = require("os")

          if obj.spec.template.metadata == nil then
            obj.spec.template.metadata = {}
          end

          if obj.spec.template.metadata.annotations == nil then
            obj.spec.template.metadata.annotations = {}
          end

          if obj.spec.strategy.rollingUpdate == nil then
            obj.spec.strategy.rollingUpdate = {}
          end

          obj.spec.strategy.rollingUpdate.maxSurge = "100%"
          obj.spec.template.metadata.annotations["kubectl.kubernetes.io/restartedAt"] = os.date("!%Y-%m-%dT%XZ")

          return obj