We are running Kong with the Ingress Controller, db-less. When we tried upgrading to Kong 3.4, KIC 2.28, we see a “failed posting new config” error (see below). The generic question is: How do we find the root cause when we see such an error? There is no indication for what is wrong.
level=error msg="could not update kong admin" error="performing update for https://localhost:8444 failed: failed posting new config to /config: got status code 400" subsystem=dataplane-synchronizer