My biggest problem with Rancher fleet currently is that when something doesn't work, it's very hard to locate an error message telling you what actually is holding things up. You might see the fleet agent giving a 401, or a bunch of resources in state "missing", while they are definitely in the gitops repo.

But to list some others:


Their solution for this is JSON diff blocks, that tell fleet to ignore changes to a specific part of the yaml. This however is super anti-gitops, because it's not the repo telling the cluster what the state should be. It's the cluster (fleet-agent) telling a human what the repo should be. Moreover, this is impossible to predict for an arbitrary resource, and so is antithetical to automating management/generation of the gitops repo.

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