apiVersion: v1
kind: ConfigMap
metadata:
  name: prometheus-k8s-rules
  labels:
    role: prometheus-rulefiles
    prometheus: k8s
data:
  alertmanager.rules.yaml: |+
    groups:
    - name: alertmanager.rules
      rules:
      - alert: AlertmanagerConfigInconsistent
        expr: count_values("config_hash", alertmanager_config_hash) BY (service) / ON(service)
          GROUP_LEFT() label_replace(prometheus_operator_alertmanager_spec_replicas, "service",
          "alertmanager-$1", "alertmanager", "(.*)") != 1
        for: 5m
        labels:
          severity: critical
        annotations:
          description: The configuration of the instances of the Alertmanager cluster
            `{{$labels.service}}` are out of sync.
      - alert: AlertmanagerDownOrMissing
        expr: label_replace(prometheus_operator_alertmanager_spec_replicas, "job", "alertmanager-$1",
          "alertmanager", "(.*)") / ON(job) GROUP_RIGHT() sum(up) BY (job) != 1
        for: 5m
        labels:
          severity: warning
        annotations:
          description: An unexpected number of Alertmanagers are scraped or Alertmanagers
            disappeared from discovery.
      - alert: AlertmanagerFailedReload
        expr: alertmanager_config_last_reload_successful == 0
        for: 10m
        labels:
          severity: warning
        annotations:
          description: Reloading Alertmanager's configuration has failed for {{ $labels.namespace
            }}/{{ $labels.pod}}.
  etcd3.rules.yaml: |+
    groups:
    - name: ./etcd3.rules
      rules:
      - alert: InsufficientMembers
        expr: count(up{job="etcd"} == 0) > (count(up{job="etcd"}) / 2 - 1)
        for: 3m
        labels:
          severity: critical
        annotations:
          description: If one more etcd member goes down the cluster will be unavailable
          summary: etcd cluster insufficient members
      - alert: NoLeader
        expr: etcd_server_has_leader{job="etcd"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          description: etcd member {{ $labels.instance }} has no leader
          summary: etcd member has no leader
      - alert: HighNumberOfLeaderChanges
        expr: increase(etcd_server_leader_changes_seen_total{job="etcd"}[1h]) > 3
        labels:
          severity: warning
        annotations:
          description: etcd instance {{ $labels.instance }} has seen {{ $value }} leader
            changes within the last hour
          summary: a high number of leader changes within the etcd cluster are happening
      - alert: HighNumberOfFailedGRPCRequests
        expr: sum(rate(grpc_server_handled_total{grpc_code!="OK",job="etcd"}[5m])) BY (grpc_service, grpc_method)
          / sum(rate(grpc_server_handled_total{job="etcd"}[5m])) BY (grpc_service, grpc_method) > 0.01
        for: 10m
        labels:
          severity: warning
        annotations:
          description: '{{ $value }}% of requests for {{ $labels.grpc_method }} failed
            on etcd instance {{ $labels.instance }}'
          summary: a high number of gRPC requests are failing
      - alert: HighNumberOfFailedGRPCRequests
        expr: sum(rate(grpc_server_handled_total{grpc_code!="OK",job="etcd"}[5m])) BY (grpc_service, grpc_method)
          / sum(rate(grpc_server_handled_total{job="etcd"}[5m])) BY (grpc_service, grpc_method) > 0.05
        for: 5m
        labels:
          severity: critical
        annotations:
          description: '{{ $value }}% of requests for {{ $labels.grpc_method }} failed
            on etcd instance {{ $labels.instance }}'
          summary: a high number of gRPC requests are failing
      - alert: GRPCRequestsSlow
        expr: histogram_quantile(0.99, sum(rate(grpc_server_handling_seconds_bucket{job="etcd",grpc_type="unary"}[5m])) by (grpc_service, grpc_method, le))
          > 0.15
        for: 10m
        labels:
          severity: critical
        annotations:
          description: on etcd instance {{ $labels.instance }} gRPC requests to {{ $labels.grpc_method
            }} are slow
          summary: slow gRPC requests
      - alert: HighNumberOfFailedHTTPRequests
        expr: sum(rate(etcd_http_failed_total{job="etcd"}[5m])) BY (method) / sum(rate(etcd_http_received_total{job="etcd"}[5m]))
          BY (method) > 0.01
        for: 10m
        labels:
          severity: warning
        annotations:
          description: '{{ $value }}% of requests for {{ $labels.method }} failed on etcd
            instance {{ $labels.instance }}'
          summary: a high number of HTTP requests are failing
      - alert: HighNumberOfFailedHTTPRequests
        expr: sum(rate(etcd_http_failed_total{job="etcd"}[5m])) BY (method) / sum(rate(etcd_http_received_total{job="etcd"}[5m]))
          BY (method) > 0.05
        for: 5m
        labels:
          severity: critical
        annotations:
          description: '{{ $value }}% of requests for {{ $labels.method }} failed on etcd
            instance {{ $labels.instance }}'
          summary: a high number of HTTP requests are failing
      - alert: HTTPRequestsSlow
        expr: histogram_quantile(0.99, rate(etcd_http_successful_duration_seconds_bucket[5m]))
          > 0.15
        for: 10m
        labels:
          severity: warning
        annotations:
          description: on etcd instance {{ $labels.instance }} HTTP requests to {{ $labels.method
            }} are slow
          summary: slow HTTP requests
      - alert: EtcdMemberCommunicationSlow
        expr: histogram_quantile(0.99, rate(etcd_network_peer_round_trip_time_seconds_bucket[5m]))
          > 0.15
        for: 10m
        labels:
          severity: warning
        annotations:
          description: etcd instance {{ $labels.instance }} member communication with
            {{ $labels.To }} is slow
          summary: etcd member communication is slow
      - alert: HighNumberOfFailedProposals
        expr: increase(etcd_server_proposals_failed_total{job="etcd"}[1h]) > 5
        labels:
          severity: warning
        annotations:
          description: etcd instance {{ $labels.instance }} has seen {{ $value }} proposal
            failures within the last hour
          summary: a high number of proposals within the etcd cluster are failing
      - alert: HighFsyncDurations
        expr: histogram_quantile(0.99, rate(etcd_disk_wal_fsync_duration_seconds_bucket[5m]))
          > 0.5
        for: 10m
        labels:
          severity: warning
        annotations:
          description: etcd instance {{ $labels.instance }} fync durations are high
          summary: high fsync durations
      - alert: HighCommitDurations
        expr: histogram_quantile(0.99, rate(etcd_disk_backend_commit_duration_seconds_bucket[5m]))
          > 0.25
        for: 10m
        labels:
          severity: warning
        annotations:
          description: etcd instance {{ $labels.instance }} commit durations are high
          summary: high commit durations
  general.rules.yaml: |+
    groups:
    - name: general.rules
      rules:
      - alert: TargetDown
        expr: 100 * (count(up == 0) BY (job) / count(up) BY (job)) > 10
        for: 10m
        labels:
          severity: warning
        annotations:
          description: '{{ $value }}% of {{ $labels.job }} targets are down.'
          summary: Targets are down
      - alert: DeadMansSwitch
        expr: vector(1)
        labels:
          severity: none
        annotations:
          description: This is a DeadMansSwitch meant to ensure that the entire Alerting
            pipeline is functional.
          summary: Alerting DeadMansSwitch
      - record: fd_utilization
        expr: process_open_fds / process_max_fds
      - alert: FdExhaustionClose
        expr: predict_linear(fd_utilization[1h], 3600 * 4) > 1
        for: 10m
        labels:
          severity: warning
        annotations:
          description: '{{ $labels.job }}: {{ $labels.namespace }}/{{ $labels.pod }} instance
            will exhaust in file/socket descriptors within the next 4 hours'
          summary: file descriptors soon exhausted
      - alert: FdExhaustionClose
        expr: predict_linear(fd_utilization[10m], 3600) > 1
        for: 10m
        labels:
          severity: critical
        annotations:
          description: '{{ $labels.job }}: {{ $labels.namespace }}/{{ $labels.pod }} instance
            will exhaust in file/socket descriptors within the next hour'
          summary: file descriptors soon exhausted
  kube-controller-manager.rules.yaml: |+
    groups:
    - name: kube-controller-manager.rules
      rules:
      - alert: K8SControllerManagerDown
        expr: absent(up{job="kube-controller-manager"} == 1)
        for: 5m
        labels:
          severity: critical
        annotations:
          description: There is no running K8S controller manager. Deployments and replication
            controllers are not making progress.
          runbook: https://coreos.com/tectonic/docs/latest/troubleshooting/controller-recovery.html#recovering-a-controller-manager
          summary: Controller manager is down
  kube-scheduler.rules.yaml: |+
    groups:
    - name: kube-scheduler.rules
      rules:
      - record: cluster:scheduler_e2e_scheduling_latency_seconds:quantile
        expr: histogram_quantile(0.99, sum(scheduler_e2e_scheduling_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.99"
      - record: cluster:scheduler_e2e_scheduling_latency_seconds:quantile
        expr: histogram_quantile(0.9, sum(scheduler_e2e_scheduling_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.9"
      - record: cluster:scheduler_e2e_scheduling_latency_seconds:quantile
        expr: histogram_quantile(0.5, sum(scheduler_e2e_scheduling_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.5"
      - record: cluster:scheduler_scheduling_algorithm_latency_seconds:quantile
        expr: histogram_quantile(0.99, sum(scheduler_scheduling_algorithm_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.99"
      - record: cluster:scheduler_scheduling_algorithm_latency_seconds:quantile
        expr: histogram_quantile(0.9, sum(scheduler_scheduling_algorithm_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.9"
      - record: cluster:scheduler_scheduling_algorithm_latency_seconds:quantile
        expr: histogram_quantile(0.5, sum(scheduler_scheduling_algorithm_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.5"
      - record: cluster:scheduler_binding_latency_seconds:quantile
        expr: histogram_quantile(0.99, sum(scheduler_binding_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.99"
      - record: cluster:scheduler_binding_latency_seconds:quantile
        expr: histogram_quantile(0.9, sum(scheduler_binding_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.9"
      - record: cluster:scheduler_binding_latency_seconds:quantile
        expr: histogram_quantile(0.5, sum(scheduler_binding_latency_microseconds_bucket)
          BY (le, cluster)) / 1e+06
        labels:
          quantile: "0.5"
      - alert: K8SSchedulerDown
        expr: absent(up{job="kube-scheduler"} == 1)
        for: 5m
        labels:
          severity: critical
        annotations:
          description: There is no running K8S scheduler. New pods are not being assigned
            to nodes.
          runbook: https://coreos.com/tectonic/docs/latest/troubleshooting/controller-recovery.html#recovering-a-scheduler
          summary: Scheduler is down
  kube-state-metrics.rules.yaml: |+
    groups:
    - name: kube-state-metrics.rules
      rules:
      - alert: DeploymentGenerationMismatch
        expr: kube_deployment_status_observed_generation != kube_deployment_metadata_generation
        for: 15m
        labels:
          severity: warning
        annotations:
          description: Observed deployment generation does not match expected one for
            deployment {{$labels.namespaces}}/{{$labels.deployment}}
          summary: Deployment is outdated
      - alert: DeploymentReplicasNotUpdated
        expr: ((kube_deployment_status_replicas_updated != kube_deployment_spec_replicas)
          or (kube_deployment_status_replicas_available != kube_deployment_spec_replicas))
          unless (kube_deployment_spec_paused == 1)
        for: 15m
        labels:
          severity: warning
        annotations:
          description: Replicas are not updated and available for deployment {{$labels.namespaces}}/{{$labels.deployment}}
          summary: Deployment replicas are outdated
      - alert: DaemonSetRolloutStuck
        expr: kube_daemonset_status_number_ready / kube_daemonset_status_desired_number_scheduled
          * 100 < 100
        for: 15m
        labels:
          severity: warning
        annotations:
          description: Only {{$value}}% of desired pods scheduled and ready for daemon
            set {{$labels.namespaces}}/{{$labels.daemonset}}
          summary: DaemonSet is missing pods
      - alert: K8SDaemonSetsNotScheduled
        expr: kube_daemonset_status_desired_number_scheduled - kube_daemonset_status_current_number_scheduled
          > 0
        for: 10m
        labels:
          severity: warning
        annotations:
          description: A number of daemonsets are not scheduled.
          summary: Daemonsets are not scheduled correctly
      - alert: DaemonSetsMissScheduled
        expr: kube_daemonset_status_number_misscheduled > 0
        for: 10m
        labels:
          severity: warning
        annotations:
          description: A number of daemonsets are running where they are not supposed
            to run.
          summary: Daemonsets are not scheduled correctly
      - alert: PodFrequentlyRestarting
        expr: increase(kube_pod_container_status_restarts_total[1h]) > 5
        for: 10m
        labels:
          severity: warning
        annotations:
          description: Pod {{$labels.namespaces}}/{{$labels.pod}} is was restarted {{$value}}
            times within the last hour
          summary: Pod is restarting frequently
  kubelet.rules.yaml: |+
    groups:
    - name: kubelet.rules
      rules:
      - alert: K8SNodeNotReady
        expr: kube_node_status_condition{condition="Ready",status="true"} == 0
        for: 1h
        labels:
          severity: warning
        annotations:
          description: The Kubelet on {{ $labels.node }} has not checked in with the API,
            or has set itself to NotReady, for more than an hour
          summary: Node status is NotReady
      - alert: K8SManyNodesNotReady
        expr: count(kube_node_status_condition{condition="Ready",status="true"} == 0)
          > 1 and (count(kube_node_status_condition{condition="Ready",status="true"} ==
          0) / count(kube_node_status_condition{condition="Ready",status="true"})) > 0.2
        for: 1m
        labels:
          severity: critical
        annotations:
          description: '{{ $value }}% of Kubernetes nodes are not ready'
      - alert: K8SKubeletDown
        expr: count(up{job="kubelet"} == 0) / count(up{job="kubelet"}) * 100 > 3
        for: 1h
        labels:
          severity: warning
        annotations:
          description: Prometheus failed to scrape {{ $value }}% of kubelets.
      - alert: K8SKubeletDown
        expr: (absent(up{job="kubelet"} == 1) or count(up{job="kubelet"} == 0) / count(up{job="kubelet"}))
          * 100 > 1
        for: 1h
        labels:
          severity: critical
        annotations:
          description: Prometheus failed to scrape {{ $value }}% of kubelets, or all Kubelets
            have disappeared from service discovery.
          summary: Many Kubelets cannot be scraped
      - alert: K8SKubeletTooManyPods
        expr: kubelet_running_pod_count > 100
        for: 10m
        labels:
          severity: warning
        annotations:
          description: Kubelet {{$labels.instance}} is running {{$value}} pods, close
            to the limit of 110
          summary: Kubelet is close to pod limit
  kubernetes.rules.yaml: |+
    groups:
    - name: kubernetes.rules
      rules:
      - record: pod_name:container_memory_usage_bytes:sum
        expr: sum(container_memory_usage_bytes{container_name!="POD",pod_name!=""}) BY
          (pod_name)
      - record: pod_name:container_spec_cpu_shares:sum
        expr: sum(container_spec_cpu_shares{container_name!="POD",pod_name!=""}) BY (pod_name)
      - record: pod_name:container_cpu_usage:sum
        expr: sum(rate(container_cpu_usage_seconds_total{container_name!="POD",pod_name!=""}[5m]))
          BY (pod_name)
      - record: pod_name:container_fs_usage_bytes:sum
        expr: sum(container_fs_usage_bytes{container_name!="POD",pod_name!=""}) BY (pod_name)
      - record: namespace:container_memory_usage_bytes:sum
        expr: sum(container_memory_usage_bytes{container_name!=""}) BY (namespace)
      - record: namespace:container_spec_cpu_shares:sum
        expr: sum(container_spec_cpu_shares{container_name!=""}) BY (namespace)
      - record: namespace:container_cpu_usage:sum
        expr: sum(rate(container_cpu_usage_seconds_total{container_name!="POD"}[5m]))
          BY (namespace)
      - record: cluster:memory_usage:ratio
        expr: sum(container_memory_usage_bytes{container_name!="POD",pod_name!=""}) BY
          (cluster) / sum(machine_memory_bytes) BY (cluster)
      - record: cluster:container_spec_cpu_shares:ratio
        expr: sum(container_spec_cpu_shares{container_name!="POD",pod_name!=""}) / 1000
          / sum(machine_cpu_cores)
      - record: cluster:container_cpu_usage:ratio
        expr: sum(rate(container_cpu_usage_seconds_total{container_name!="POD",pod_name!=""}[5m]))
          / sum(machine_cpu_cores)
      - record: apiserver_latency_seconds:quantile
        expr: histogram_quantile(0.99, rate(apiserver_request_latencies_bucket[5m])) /
          1e+06
        labels:
          quantile: "0.99"
      - record: apiserver_latency:quantile_seconds
        expr: histogram_quantile(0.9, rate(apiserver_request_latencies_bucket[5m])) /
          1e+06
        labels:
          quantile: "0.9"
      - record: apiserver_latency_seconds:quantile
        expr: histogram_quantile(0.5, rate(apiserver_request_latencies_bucket[5m])) /
          1e+06
        labels:
          quantile: "0.5"
      - alert: APIServerLatencyHigh
        expr: apiserver_latency_seconds:quantile{quantile="0.99",subresource!="log",verb!~"^(?:WATCH|WATCHLIST|PROXY|CONNECT)$"}
          > 1
        for: 10m
        labels:
          severity: warning
        annotations:
          description: the API server has a 99th percentile latency of {{ $value }} seconds
            for {{$labels.verb}} {{$labels.resource}}
      - alert: APIServerLatencyHigh
        expr: apiserver_latency_seconds:quantile{quantile="0.99",subresource!="log",verb!~"^(?:WATCH|WATCHLIST|PROXY|CONNECT)$"}
          > 4
        for: 10m
        labels:
          severity: critical
        annotations:
          description: the API server has a 99th percentile latency of {{ $value }} seconds
            for {{$labels.verb}} {{$labels.resource}}
      - alert: APIServerErrorsHigh
        expr: rate(apiserver_request_count{code=~"^(?:5..)$"}[5m]) / rate(apiserver_request_count[5m])
          * 100 > 2
        for: 10m
        labels:
          severity: warning
        annotations:
          description: API server returns errors for {{ $value }}% of requests
      - alert: APIServerErrorsHigh
        expr: rate(apiserver_request_count{code=~"^(?:5..)$"}[5m]) / rate(apiserver_request_count[5m])
          * 100 > 5
        for: 10m
        labels:
          severity: critical
        annotations:
          description: API server returns errors for {{ $value }}% of requests
      - alert: K8SApiserverDown
        expr: absent(up{job="apiserver"} == 1)
        for: 20m
        labels:
          severity: critical
        annotations:
          description: No API servers are reachable or all have disappeared from service
            discovery
    
      - alert: K8sCertificateExpirationNotice
        labels:
          severity: warning
        annotations:
          description: Kubernetes API Certificate is expiring soon (less than 7 days)
        expr: sum(apiserver_client_certificate_expiration_seconds_bucket{le="604800"}) > 0
    
      - alert: K8sCertificateExpirationNotice
        labels:
          severity: critical
        annotations:
          description: Kubernetes API Certificate is expiring in less than 1 day
        expr: sum(apiserver_client_certificate_expiration_seconds_bucket{le="86400"}) > 0
  node.rules.yaml: |+
    groups:
    - name: node.rules
      rules:
      - record: instance:node_cpu:rate:sum
        expr: sum(rate(node_cpu{mode!="idle",mode!="iowait",mode!~"^(?:guest.*)$"}[3m]))
          BY (instance)
      - record: instance:node_filesystem_usage:sum
        expr: sum((node_filesystem_size{mountpoint="/"} - node_filesystem_free{mountpoint="/"}))
          BY (instance)
      - record: instance:node_network_receive_bytes:rate:sum
        expr: sum(rate(node_network_receive_bytes[3m])) BY (instance)
      - record: instance:node_network_transmit_bytes:rate:sum
        expr: sum(rate(node_network_transmit_bytes[3m])) BY (instance)
      - record: instance:node_cpu:ratio
        expr: sum(rate(node_cpu{mode!="idle"}[5m])) WITHOUT (cpu, mode) / ON(instance)
          GROUP_LEFT() count(sum(node_cpu) BY (instance, cpu)) BY (instance)
      - record: cluster:node_cpu:sum_rate5m
        expr: sum(rate(node_cpu{mode!="idle"}[5m]))
      - record: cluster:node_cpu:ratio
        expr: cluster:node_cpu:rate5m / count(sum(node_cpu) BY (instance, cpu))
      - alert: NodeExporterDown
        expr: absent(up{job="node-exporter"} == 1)
        for: 10m
        labels:
          severity: warning
        annotations:
          description: Prometheus could not scrape a node-exporter for more than 10m,
            or node-exporters have disappeared from discovery
      - alert: NodeDiskRunningFull
        expr: predict_linear(node_filesystem_free[6h], 3600 * 24) < 0
        for: 30m
        labels:
          severity: warning
        annotations:
          description: device {{$labels.device}} on node {{$labels.instance}} is running
            full within the next 24 hours (mounted at {{$labels.mountpoint}})
      - alert: NodeDiskRunningFull
        expr: predict_linear(node_filesystem_free[30m], 3600 * 2) < 0
        for: 10m
        labels:
          severity: critical
        annotations:
          description: device {{$labels.device}} on node {{$labels.instance}} is running
            full within the next 2 hours (mounted at {{$labels.mountpoint}})
  prometheus.rules.yaml: |+
    groups:
    - name: prometheus.rules
      rules:
      - alert: PrometheusConfigReloadFailed
        expr: prometheus_config_last_reload_successful == 0
        for: 10m
        labels:
          severity: warning
        annotations:
          description: Reloading Prometheus' configuration has failed for {{$labels.namespace}}/{{$labels.pod}}
      - alert: PrometheusNotificationQueueRunningFull
        expr: predict_linear(prometheus_notifications_queue_length[5m], 60 * 30) > prometheus_notifications_queue_capacity
        for: 10m
        labels:
          severity: warning
        annotations:
          description: Prometheus' alert notification queue is running full for {{$labels.namespace}}/{{
            $labels.pod}}
      - alert: PrometheusErrorSendingAlerts
        expr: rate(prometheus_notifications_errors_total[5m]) / rate(prometheus_notifications_sent_total[5m])
          > 0.01
        for: 10m
        labels:
          severity: warning
        annotations:
          description: Errors while sending alerts from Prometheus {{$labels.namespace}}/{{
            $labels.pod}} to Alertmanager {{$labels.Alertmanager}}
      - alert: PrometheusErrorSendingAlerts
        expr: rate(prometheus_notifications_errors_total[5m]) / rate(prometheus_notifications_sent_total[5m])
          > 0.03
        for: 10m
        labels:
          severity: critical
        annotations:
          description: Errors while sending alerts from Prometheus {{$labels.namespace}}/{{
            $labels.pod}} to Alertmanager {{$labels.Alertmanager}}
      - alert: PrometheusNotConnectedToAlertmanagers
        expr: prometheus_notifications_alertmanagers_discovered < 1
        for: 10m
        labels:
          severity: warning
        annotations:
          description: Prometheus {{ $labels.namespace }}/{{ $labels.pod}} is not connected
            to any Alertmanagers
      - alert: PrometheusTSDBReloadsFailing
        expr: increase(prometheus_tsdb_reloads_failures_total[2h]) > 0
        for: 12h
        labels:
          severity: warning
        annotations:
          description: '{{$labels.job}} at {{$labels.instance}} had {{$value | humanize}}
            reload failures over the last four hours.'
          summary: Prometheus has issues reloading data blocks from disk
      - alert: PrometheusTSDBCompactionsFailing
        expr: increase(prometheus_tsdb_compactions_failed_total[2h]) > 0
        for: 12h
        labels:
          severity: warning
        annotations:
          description: '{{$labels.job}} at {{$labels.instance}} had {{$value | humanize}}
            compaction failures over the last four hours.'
          summary: Prometheus has issues compacting sample blocks
      - alert: PrometheusTSDBWALCorruptions
        expr: tsdb_wal_corruptions_total > 0
        for: 4h
        labels:
          severity: warning
        annotations:
          description: '{{$labels.job}} at {{$labels.instance}} has a corrupted write-ahead
            log (WAL).'
          summary: Prometheus write-ahead log is corrupted