blue-green and helm reconciliation issues

[johanot]

Hi,

I have a service similar to the Helm example: https://github.com/argoproj/argo-rollouts/tree/master/examples/helm-blue-green

When running helm upgrade, Helm replaces my service-selector instead of "merging" it, meaning that rollouts-pod-template-hash disappears and subsequently the blue-green deployment is fast-tracked, due to: https://github.com/argoproj/argo-rollouts/blob/master/rollout/bluegreen.go#L121-L123

Has anyone in here experienced something similar?

[johanot]

It looks like it is related to upgrade to Helm v4 and ServerSideApply.. When I disable SSA, the service selector is not replaced, but instead merged.