Prometheus remote-write-reciever - kube-prometheus-stack

[Siradj Eddine Fisli]

I used kube-prometheus-stack chart version 55.5.1 , but i got a problem when i tried to enable the remote-write-reciever option in the centralized prometheus instance. 
I passed these values to the values.yaml:

prometheus:
   prometheusSpec:
       enableRemoteWriteReceiver: true
       enableFeatures: 
           - remote-write-receiver

but when i check the flags in prometheus ui i find it false, also when i try to curl using post to the endpoint i get this error " remote write receiver needs to be enabled with --web.enable-remote-write-receiver"
any suggestions ?

[Brian Candler]

I presume you're looking in the web UI at /prometheus/flags (Status > Command-Line Flags). You say this shows "false", but do you actually mean it's empty? That's different.

Can you get a shell inside the container, run "ps auxwww" and see what flags have been passed to prometheus?

I note that the documentation says 

--enable-feature=remote-write-receiver

but the error message you get says you need

--web.enable-remote-write-receiver

 The source code explains what's going on:

./cmd/prometheus/main.go: level.Warn(logger).Log("msg", "Remote write receiver enabled via feature flag remote-write-receiver. This is DEPRECATED. Use --web.enable-remote-write-receiver.")

So it *should* still work to supply --enable-feature=remote-write-receiver, and you need to confirm whether that flag is actually being passed to prometheus. I guess most likely it's not, in which case either it's a bug in the helm chart, or the way you're invoking it.