service-ca-operator is using a 2s period for leader election {client="service-ca-operator/v0.0.0 (linux/amd64) kubernetes/$Format",resource="configmaps",verb="PUT"} 0.5 It should be using a much higher period, see defaults from library-go (I think we're at 15s or so). Once fixed this should be back ported to 4.1 because it increases base load.
Seems to be already fixed in https://github.com/openshift/service-ca-operator/pull/55
Verified on 4.2.0-0.nightly-2019-07-24-233914 {client="service-ca-operator/v0.0.0 (linux/amd64) kubernetes/$Format",code="200",component="apiserver",contentType="application/json",endpoint="https",instance="10.0.130.163:6443",job="apiserver",namespace="default",resource="configmaps",scope="namespace",service="kubernetes",verb="GET",version="v1"} 0.1 {client="service-ca-operator/v0.0.0 (linux/amd64) kubernetes/$Format",code="200",component="apiserver",contentType="application/json",endpoint="https",instance="10.0.157.229:6443",job="apiserver",namespace="default",resource="configmaps",scope="namespace",service="kubernetes",verb="GET",version="v1"} 0.29630288080475864 {client="service-ca-operator/v0.0.0 (linux/amd64) kubernetes/$Format",code="200",component="apiserver",contentType="application/vnd.kubernetes.protobuf",endpoint="https",instance="10.0.130.163:6443",job="apiserver",namespace="default",resource="configmaps",scope="namespace",service="kubernetes",verb="GET",version="v1"} 0.044444444444444446 {client="service-ca-operator/v0.0.0 (linux/amd64) kubernetes/$Format",code="200",component="apiserver",contentType="application/json",endpoint="https",instance="10.0.130.163:6443",job="apiserver",namespace="default",resource="configmaps",scope="namespace",service="kubernetes",verb="PUT",version="v1"} 0.1 {client="service-ca-operator/v0.0.0 (linux/amd64) kubernetes/$Format",code="200",component="apiserver",contentType="application/json",endpoint="https",instance="10.0.157.229:6443",job="apiserver",namespace="default",resource="configmaps",scope="namespace",service="kubernetes",verb="PUT",version="v1"} 0.3 {client="service-ca-operator/v0.0.0 (linux/amd64) kubernetes/$Format",code="200",component="apiserver",contentType="application/vnd.kubernetes.protobuf",endpoint="https",instance="10.0.157.229:6443",job="apiserver",namespace="default",resource="configmaps",scope="namespace",service="kubernetes",verb="PUT",version="v1"} 0.003703703703703704
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2019:2922