| Alertname | Severity | Type | Description |
|---|---|---|---|
| ApiServerUnreachableViaKubernetesService | critical | shoot | The Api server has been unreachable for 3 minutes via the kubernetes service in the shoot. |
| KubeKubeletNodeDown | warning | shoot | The kubelet {{ $labels.instance }} has been unavailable/unreachable for more than 1 hour. Workloads on the affected node may not be schedulable. |
| KubeletTooManyOpenFileDescriptorsShoot | warning | shoot | Shoot-kubelet ({{ $labels.kubernetes_io_hostname }}) is using {{ $value }}% of the available file/socket descriptors. Kubelet could be under heavy load. |
| KubeletTooManyOpenFileDescriptorsShoot | critical | shoot | Shoot-kubelet ({{ $labels.kubernetes_io_hostname }}) is using {{ $value }}% of the available file/socket descriptors. Kubelet could be under heavy load. |
| KubePodPendingShoot | warning | shoot | Pod {{ $labels.pod }} is stuck in "Pending" state for more than 1 hour. |
| KubePodNotReadyShoot | warning | shoot | Pod {{ $labels.pod }} is not ready for more than 1 hour. |
| NodeExporterDown | warning | shoot | The NodeExporter has been down or unreachable from Prometheus for more than 1 hour. |
| K8SNodeOutOfDisk | critical | shoot | Node {{ $labels.node }} has run out of disk space. |
| K8SNodeMemoryPressure | warning | shoot | Node {{ $labels.node }} is under memory pressure. |
| K8SNodeDiskPressure | warning | shoot | Node {{ $labels.node }} is under disk pressure |
| VMRootfsFull | critical | shoot | Root filesystem device on instance {{ $labels.instance }} is almost full. |
| VMConntrackTableFull | critical | shoot | The nf_conntrack table is {{ $value }}% full. |
| VPNProbeAPIServerProxyFailed | critical | shoot | The API Server proxy functionality is not working. Probably the vpn connection from an API Server pod to the vpn-shoot endpoint on the Shoot workers does not work. |