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OKD - cluster is shown as 'stale'

Openshift and OKD send telemetry back to redhat by default which allows insights and recommendations to be generated. Depending on the stability of your connection, the telemetry-client might not be able to phone back home and mark the cluster as 'stale', here's one way to fix it on openshift-4.12 / okd-4.12:

Check if all nodes are available:
 $ oc get nodes -o wide  
 $ oc adm top node  
Check the openshoft-monitoring namespace for any failed pods:
 $ oc -n openshift-monitoring get pods  
Next, check the telemetry-client logs:
 $ oc -n openshift-monitoring logs --tail=4 pods/telemeter-client-7fcf756fb9-5hvzv  
Output:
 level=error caller=forwarder.go:276 ts=2023-04-13T12:54:24.193722974Z component=forwarder/worker msg="unable to forward results" err="Post \"https://infogw.api.openshift.com/upload\": dial tcp: lookup infogw.api.openshift.com on 172.30.0.10:53: read udp 10.131.0.27:32903->172.30.0.10:53: i/o timeout"  
 level=error caller=forwarder.go:276 ts=2023-04-13T12:55:34.293997924Z component=forwarder/worker msg="unable to forward results" err="Post \"https://infogw.api.openshift.com/upload\": dial tcp: lookup infogw.api.openshift.com on 172.30.0.10:53: server misbehaving"  
 level=error caller=forwarder.go:276 ts=2023-04-14T21:16:54.094485696Z component=forwarder/worker msg="unable to forward results" err="Post \"https://infogw.api.openshift.com/upload\": dial tcp: lookup infogw.api.openshift.com on 172.30.0.10:53: server misbehaving"  
 level=error caller=forwarder.go:276 ts=2023-04-14T21:18:04.199631411Z component=forwarder/worker msg="unable to forward results" err="Post \"https://infogw.api.openshift.com/upload\": dial tcp: lookup infogw.api.openshift.com on 172.30.0.10:53: read udp 10.131.0.27:36950->172.30.0.10:53: i/o timeout"  
In my case, my very unstable internet connection in the last few days (thanks ISP) was at fault, so just delete the pod and wait until kubernetes re-creates it:
 $ oc -n openshift-monitoring delete pods telemeter-client-7fcf756fb9-5hvzv  
Feel free to comment and / or suggest a topic

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