Kubernetes system

This section lists the alerts for the Kubernetes system.

• KubeNodeNotReady

• KubeStateMetricsTargetDown

• KubeVersionMismatch

• KubeletTargetDown

• KubeletTargetsOutage

• KubeClientErrors

• KubeContainerScrapeError

• KubeDNSTargetsOutage

• KubeletTooManyPods

• cAdvisorTargetDown

• cAdvisorTargetsOutage

• KubeAPIDown

• KubeAPIOutage

• KubeAPIErrorsHighMajor

• KubeAPIErrorsHighWarning

• KubeAPIResourceErrorsHighMajor

• KubeAPIResourceErrorsHighWarning

• KubeClientCertificateExpirationInSevenDays

• KubeClientCertificateExpirationInOneDay

• KubeAPICertExpirationMajor

• KubeAPICertExpirationWarning

• KubernetesApiserverTargetsOutage

• KubernetesMasterAPITargetsOutage

---

KubeNodeNotReady

Severity	Warning
Summary	Node {{ $labels.node }} is not ready.
Description	The {{ $labels.node }} Kubernetes has been unready for more than an hour.

KubeStateMetricsTargetDown

Severity	Critical
Summary	kube-state-metrics Prometheus target is down.
Description	Prometheus fails to scrape metrics from the kube-state-metrics endpoint(s) (more than 1/10 failed scrapes).

KubeVersionMismatch

Severity	Warning
Summary	Kubernetes components version mismatch.
Description	There are {{ $value }} different semantic versions of Kubernetes components running.

KubeletTargetDown

Severity	Critical
Summary	Kubelet Prometheus target is down.
Description	Prometheus fails to scrape metrics from kubelet on the {{ $labels.node }} node (more than 1/10 failed scrapes).

KubeletTargetsOutage

Severity	Critical
Summary	Kubelet Prometheus targets outage.
Description	Prometheus fails to scrape metrics from kubelet on all nodes (more than 1/10 failed scrapes).

KubeClientErrors

Severity	Warning
Summary	Kubernetes API client has more than 1% of error requests.
Description	The {{ $labels.instance }} Kubernetes API server client has {{ printf "%0.0f" $value }}% errors.

KubeContainerScrapeError

Severity	Warning
Summary	Failure to get Kubernetes container metrics.
Description	cAdvisor was not able to scrape metrics from some containers on the {{ $labels.node }} Kubernetes node.

KubeDNSTargetsOutage

Severity	Critical
Summary	CoreDNS Prometheus targets outage.
Description	Prometheus fails to scrape metrics from all CoreDNS endpoints (more than 1/10 failed scrapes).

KubeletTooManyPods

Severity	Warning
Summary	kubelet reached 90% of Pods limit.
Description	The kubelet container on the {{ $labels.node }} Node is running {{ $value }} Pods, nearly 90% of possible allocation.

cAdvisorTargetDown

Severity	Major
Summary	cAdvisor Prometheus target is down.
Description	Prometheus fails to scrape metrics from cAdvisor on the {{ $labels.node }} node (more than 1/10 failed scrapes).

cAdvisorTargetsOutage

Severity	Critical
Summary	cAdvisor Prometheus targets outage.
Description	Prometheus fails to scrape metrics from cAdvisor on all nodes (more than 1/10 failed scrapes).

KubeAPIDown

Severity	Critical
Summary	A Kubernetes API endpoint is down.
Description	The {{ $labels.node }} Kubernetes API endpoint is not accessible for the last 3 minutes.

KubeAPIOutage

Severity	Critical
Summary	Kubernetes API is down.
Description	The Kubernetes API is not accessible for the last 30 seconds.

KubeAPIErrorsHighMajor

Severity	Major
Summary	API server is returning errors for more than 3% of requests.
Description	The {{ $labels.instance }} API server is returning errors for {{ $value }}% of requests.

KubeAPIErrorsHighWarning

Severity	Warning
Summary	API server is returning errors for more than 1% of requests.
Description	The API server is returning errors for {{ $value }}% of requests.

KubeAPIResourceErrorsHighMajor

Severity	Major
Summary	API server is returning errors for 10% of requests.
Description	The {{ $labels.instance }} API server is returning errors for {{ $value }}% of requests for {{ $labels.resource }} {{ $labels.subresource }}.

KubeAPIResourceErrorsHighWarning

Severity	Warning
Summary	API server is returning errors for 5% of requests.
Description	The {{ $labels.instance }} API server is returning errors for {{ $value }}% of requests for {{ $labels.resource }} {{ $labels.subresource }}.

KubeClientCertificateExpirationInSevenDays

Severity	Warning
Summary	Client certificate expires in 7 days.
Description	The client certificate used to authenticate to the API server expires in less than 7 days.

KubeClientCertificateExpirationInOneDay

Severity	Critical
Summary	Client certificate expires in 24 hours.
Description	The client certificate used to authenticate to the API server expires in less than 24 hours.

KubeAPICertExpirationMajor

Severity	Major
Summary	Kubernetes API certificate expires in less than 10 days.
Description	The SSL certificate for Kubernetes API expires in less than 10 days.

KubeAPICertExpirationWarning

Severity	Warning
Summary	Kubernetes API certificate expires in less than 30 days.
Description	The SSL certificate for Kubernetes API expires in less than 30 days.

KubernetesApiserverTargetsOutage

Severity	Critical
Summary	Kubernetes API server Prometheus targets outage.
Description	Prometheus fails to scrape metrics from 2/3 of Kubernetes API server endpoints (more than 1/10 failed scrapes).

KubernetesMasterAPITargetsOutage

Severity	Critical
Summary	Kubernetes master API Prometheus targets outage.
Description	Prometheus fails to scrape metrics from 2/3 of Kubernetes master API nodes (more than 1/10 failed scrapes).