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v1.7 to 1.8

The argocd-application-controller converted to StatefulSet

The argocd-application-controller has been converted to StatefulSet. That means you need to manually delete argocd-application-controller Deployment after upgrading. Similarly if you decided to rollback to v1.7 don't forget to delete argocd-application-controller StatefulSet.

Health assessement of CRD has been removed

The health assessement of CRD has been removed (see #3781 for more information). You might need to restore it if you are using app-of-apps pattern and orchestrating syncronization using sync waves. Add the following resource customization in argocd-cm ConfigMap:

apiVersion: v1
kind: ConfigMap
  name: argocd-cm
  namespace: argocd
  labels: argocd-cm argocd
  resource.customizations: |
      health.lua: |
        hs = {}
        hs.status = "Progressing"
        hs.message = ""
        if obj.status ~= nil then
          if ~= nil then
            hs.status =
            if ~= nil then
              hs.message =
        return hs

gRPC metrics are disabled by default

The gRPC metrics are not exposed by default by argocd-server and argocd-repo-server anymore. These metrics appear to be too expensive so we've decided to disable them by default. Metrics can be enabled using ARGOCD_ENABLE_GRPC_TIME_HISTOGRAM=true environment variable.

From here on you can follow the regular upgrade process.