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:


For some reason, resources are applied alphabetically. So fleet will fail to start the yaml called app-that-needs-sql.yaml, because it's missing the sql-details.yaml configmap, even though both are in the same folder in the gitops repo. I don't know how, but flux has no problem with such a thing, so I classify it as poor implementation rather than a limitation.

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