Checked related metrics from Prometheus for 4.2 not fixed OCP build, client tag is not empty, see the following $ oc get clusterversion NAME VERSION AVAILABLE PROGRESSING SINCE STATUS version 4.2.0-0.nightly-2020-04-12-022832 True False 24m Cluster version is 4.2.0-0.nightly-2020-04-12-022832 apiserver_request_total{client="cluster-kube-apiserver-operator/v0.0.0 (linux/amd64) kubernetes/$Format",code="0",component="apiserver",contentType="application/json",endpoint="https",group="config.openshift.io",instance="...:6443",job="apiserver",namespace="default",resource="apiservers",scope="cluster",service="kubernetes",verb="WATCH",version="v1"} Verified with fixed OCP build 4.2.0-0.nightly-2020-05-07-194422, searched related metrics from Prometheus apiserver_request_count{code="200",component="apiserver",contentType="application/vnd.kubernetes.protobuf",endpoint="https",group="oauth.openshift.io",instance="...:8443",job="api",namespace="openshift-apiserver",pod="apiserver-lf9qz",resource="oauthclients",scope="cluster",service="api",verb="GET",version="v1"} apiserver_request_total{code="200",component="apiserver",contentType="application/json",endpoint="https",group="image.openshift.io",instance="...42:8443",job="api",namespace="openshift-apiserver",pod="apiserver-f9qp8",resource="imagestreams",scope="cluster",service="api",verb="LIST",version="v1"} Compared old 4.2 and latest 4.2 build about the apiserver_request_total and apiserver_request_count at the Prometheus metric, the label ‘client’ was gone, it is as expected.
Per https://bugzilla.redhat.com/show_bug.cgi?id=1798297#c6, closing this bug 1803084 as dup to avoid the same issue is dup tracked and verified in multiple bugs. *** This bug has been marked as a duplicate of bug 1798297 ***