{{- /*
Generated from 'kubernetes-system-kubelet' group from https://raw.githubusercontent.com/prometheus-operator/kube-prometheus/master/manifests/kubernetes-prometheusRule.yaml
Do not change in-place! In order to change this file first read following link:
https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack/hack
*/ -}}
{{- $kubeTargetVersion := default .Capabilities.KubeVersion.GitVersion .Values.kubeTargetVersionOverride }}
{{- if and (semverCompare ">=1.14.0-0" $kubeTargetVersion) (semverCompare "<9.9.9-9" $kubeTargetVersion) .Values.defaultRules.create .Values.defaultRules.rules.kubernetesSystem }}
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: {{ printf "%s-%s" (include "kube-prometheus-stack.fullname" .) "kubernetes-system-kubelet" | trunc 63 | trimSuffix "-" }}
  namespace: {{ template "kube-prometheus-stack.namespace" . }}
  labels:
    app: {{ template "kube-prometheus-stack.name" . }}
{{ include "kube-prometheus-stack.labels" . | indent 4 }}
{{- if .Values.defaultRules.labels }}
{{ toYaml .Values.defaultRules.labels | indent 4 }}
{{- end }}
{{- if .Values.defaultRules.annotations }}
  annotations:
{{ toYaml .Values.defaultRules.annotations | indent 4 }}
{{- end }}
spec:
  groups:
  - name: kubernetes-system-kubelet
    rules:
    - alert: KubeNodeNotReady
      annotations:
        description: '{{`{{`}} $labels.node {{`}}`}} has been unready for more than 15 minutes.'
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubenodenotready
        summary: Node is not ready.
      expr: kube_node_status_condition{job="kube-state-metrics",condition="Ready",status="true"} == 0
      for: 15m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeNodeUnreachable
      annotations:
        description: '{{`{{`}} $labels.node {{`}}`}} is unreachable and some workloads may be rescheduled.'
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubenodeunreachable
        summary: Node is unreachable.
      expr: (kube_node_spec_taint{job="kube-state-metrics",key="node.kubernetes.io/unreachable",effect="NoSchedule"} unless ignoring(key,value) kube_node_spec_taint{job="kube-state-metrics",key=~"ToBeDeletedByClusterAutoscaler|cloud.google.com/impending-node-termination|aws-node-termination-handler/spot-itn"}) == 1
      for: 15m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletTooManyPods
      annotations:
        description: Kubelet '{{`{{`}} $labels.node {{`}}`}}' is running at {{`{{`}} $value | humanizePercentage {{`}}`}} of its Pod capacity.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubelettoomanypods
        summary: Kubelet is running at capacity.
      expr: |-
        count by(node) (
          (kube_pod_status_phase{job="kube-state-metrics",phase="Running"} == 1) * on(instance,pod,namespace,cluster) group_left(node) topk by(instance,pod,namespace,cluster) (1, kube_pod_info{job="kube-state-metrics"})
        )
        /
        max by(node) (
          kube_node_status_capacity{job="kube-state-metrics",resource="pods"} != 1
        ) > 0.95
      for: 15m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeNodeReadinessFlapping
      annotations:
        description: The readiness status of node {{`{{`}} $labels.node {{`}}`}} has changed {{`{{`}} $value {{`}}`}} times in the last 15 minutes.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubenodereadinessflapping
        summary: Node readiness status is flapping.
      expr: sum(changes(kube_node_status_condition{status="true",condition="Ready"}[15m])) by (node) > 2
      for: 15m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletPlegDurationHigh
      annotations:
        description: The Kubelet Pod Lifecycle Event Generator has a 99th percentile duration of {{`{{`}} $value {{`}}`}} seconds on node {{`{{`}} $labels.node {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletplegdurationhigh
        summary: Kubelet Pod Lifecycle Event Generator is taking too long to relist.
      expr: node_quantile:kubelet_pleg_relist_duration_seconds:histogram_quantile{quantile="0.99"} >= 10
      for: 5m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletPodStartUpLatencyHigh
      annotations:
        description: Kubelet Pod startup 99th percentile latency is {{`{{`}} $value {{`}}`}} seconds on node {{`{{`}} $labels.node {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletpodstartuplatencyhigh
        summary: Kubelet Pod startup latency is too high.
      expr: histogram_quantile(0.99, sum(rate(kubelet_pod_worker_duration_seconds_bucket{job="kubelet", metrics_path="/metrics"}[5m])) by (instance, le)) * on(instance) group_left(node) kubelet_node_name{job="kubelet", metrics_path="/metrics"} > 60
      for: 15m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletClientCertificateExpiration
      annotations:
        description: Client certificate for Kubelet on node {{`{{`}} $labels.node {{`}}`}} expires in {{`{{`}} $value | humanizeDuration {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletclientcertificateexpiration
        summary: Kubelet client certificate is about to expire.
      expr: kubelet_certificate_manager_client_ttl_seconds < 604800
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletClientCertificateExpiration
      annotations:
        description: Client certificate for Kubelet on node {{`{{`}} $labels.node {{`}}`}} expires in {{`{{`}} $value | humanizeDuration {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletclientcertificateexpiration
        summary: Kubelet client certificate is about to expire.
      expr: kubelet_certificate_manager_client_ttl_seconds < 86400
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletServerCertificateExpiration
      annotations:
        description: Server certificate for Kubelet on node {{`{{`}} $labels.node {{`}}`}} expires in {{`{{`}} $value | humanizeDuration {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletservercertificateexpiration
        summary: Kubelet server certificate is about to expire.
      expr: kubelet_certificate_manager_server_ttl_seconds < 604800
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletServerCertificateExpiration
      annotations:
        description: Server certificate for Kubelet on node {{`{{`}} $labels.node {{`}}`}} expires in {{`{{`}} $value | humanizeDuration {{`}}`}}.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletservercertificateexpiration
        summary: Kubelet server certificate is about to expire.
      expr: kubelet_certificate_manager_server_ttl_seconds < 86400
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletClientCertificateRenewalErrors
      annotations:
        description: Kubelet on node {{`{{`}} $labels.node {{`}}`}} has failed to renew its client certificate ({{`{{`}} $value | humanize {{`}}`}} errors in the last 5 minutes).
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletclientcertificaterenewalerrors
        summary: Kubelet has failed to renew its client certificate.
      expr: increase(kubelet_certificate_manager_client_expiration_renew_errors[5m]) > 0
      for: 15m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
    - alert: KubeletServerCertificateRenewalErrors
      annotations:
        description: Kubelet on node {{`{{`}} $labels.node {{`}}`}} has failed to renew its server certificate ({{`{{`}} $value | humanize {{`}}`}} errors in the last 5 minutes).
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletservercertificaterenewalerrors
        summary: Kubelet has failed to renew its server certificate.
      expr: increase(kubelet_server_expiration_renew_errors[5m]) > 0
      for: 15m
      labels:
        severity: warning
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
{{- if .Values.prometheusOperator.kubeletService.enabled }}
    - alert: KubeletDown
      annotations:
        description: Kubelet has disappeared from Prometheus target discovery.
        runbook_url: {{ .Values.defaultRules.runbookUrl }}alert-name-kubeletdown
        summary: Target disappeared from Prometheus target discovery.
      expr: absent(up{job="kubelet", metrics_path="/metrics"} == 1)
      for: 15m
      labels:
        severity: critical
{{- if .Values.defaultRules.additionalRuleLabels }}
{{ toYaml .Values.defaultRules.additionalRuleLabels | indent 8 }}
{{- end }}
{{- end }}
{{- end }}