Mar 12 18:52:24.937 - 58s E namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/firing severity/critical ALERTS
{alertname="KubeAPIErrorBudgetBurn", alertstate="firing", long="1h", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="critical", short="5m"}

We have many guards making sure that there are always at least two instances of the kube-apiserver. If we ever reach a single kube-apiserver and it causes disruption for the clients, other alerts such as KubeAPIErrorBudgetBurn will fire.
KubeAPIDown is here to make sure that Prometheus and really any client can reach the kube-apiserver, which they can even when there is only one instance of kube-apiserver running. If they can't or that availability is disrupted, `KubeAPIErrorBudgetBurn` will fire.
Comment 23058588 by Marcel Härri at 2023-09-19T06:57:07.949+0000

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 27m58s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 27m58s, firing for 0s:
Apr 23 21:09:18.233 - 1678s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 19m58s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 19m58s, firing for 0s:
Apr 23 09:13:16.659 - 1198s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 1h16m14s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 1h16m14s, firing for 0s:
Apr 22 21:19:57.407 - 4574s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 1h4m14s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 1h4m14s, firing for 0s:
Apr 22 09:13:45.366 - 3854s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 1h7m54s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 1h7m54s, firing for 0s:
Apr 25 09:15:19.153 - 4074s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 25m28s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 25m28s, firing for 0s:
Apr 24 21:13:56.748 - 1528s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 56m28s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 56m28s, firing for 0s:
Apr 24 09:13:04.962 - 3388s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 16m58s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 16m58s, firing for 0s:
Apr 19 21:14:05.222 - 1018s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 15m58s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 15m58s, firing for 0s:
Apr 18 21:10:48.731 - 958s  I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 6m58s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 6m58s, firing for 0s:
Apr 16 22:39:13.635 - 418s  I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}

# [bz-kube-apiserver][invariant] alert/KubeAPIErrorBudgetBurn should not be at or above pending
KubeAPIErrorBudgetBurn was at or above pending for at least 18m58s on platformidentification.JobType{Release:"4.16", FromRelease:"", Platform:"", Architecture:"s390x", Network:"ovn", Topology:"ha"} (maxAllowed=0s): pending for 18m58s, firing for 0s:
Apr 16 09:33:26.734 - 1138s I namespace/openshift-kube-apiserver alert/KubeAPIErrorBudgetBurn alertstate/pending severity/warning ALERTS{alertname="KubeAPIErrorBudgetBurn", alertstate="pending", long="3d", namespace="openshift-kube-apiserver", prometheus="openshift-monitoring/k8s", severity="warning", short="6h"}