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Mirantis Kubernetes Engine

This section describes the alerts for the Mirantis Kubernetes Engine (MKE) cluster, including the Docker Swarm service.

For troubleshooting guidelines, see Troubleshoot Mirantis Kubernetes Engine alerts.

• DockerSwarmNetworkUnhealthy

• DockerSwarmNodeFlapping

• DockerSwarmServiceReplicasDown

• DockerSwarmServiceReplicasFlapping

• DockerSwarmServiceReplicasOutage

• MKEAPICertExpirationHigh

• MKEAPICertExpirationMedium

• MKEAPIDown

• MKEAPIOutage

• MKEContainersUnhealthy

• MKEManagerAPITargetsOutage

• MKEMetricsControllerTargetsOutage

• MKEMetricsEngineTargetDown

• MKEMetricsEngineTargetsOutage

• MKENodeDiskFullCritical

• MKENodeDiskFullWarning

• MKENodeFlapping

• MKENodeDown

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DockerSwarmNetworkUnhealthy

Severity	Warning
Summary	Docker Swarm network unhealthy.
Description	The qLen size and NetMsg showed unexpected output for the last 10 minutes. Verify the NetworkDb Stats output for the qLen size and NetMsg using journalctl -d docker. Note For the DockerNetworkUnhealthy alert, StackLight collects metrics from logs. Therefore, this alert is available only if logging is enabled.

DockerSwarmNodeFlapping

Replaced with MKENodeFlapping in MOSK 25.1 and MOSK management 2.29.0

Severity	Major
Summary	Docker Swarm node is flapping.
Description	The {{ $labels.node_name }} Docker Swarm node (ID: {{ $labels.node_id }}) state flapped more than 3 times for the last 10 minutes.

DockerSwarmServiceReplicasDown

Severity	Major
Summary	Docker Swarm replica is down.
Description	The {{ $labels.service_name }} Docker Swarm {{ $labels.service_mode }} service replica is down for 5 minutes.

DockerSwarmServiceReplicasFlapping

Severity	Major
Summary	Docker Swarm service is flapping.
Description	The {{ $labels.service_name }} Docker Swarm {{ $labels.service_mode }} service replica is flapping for longer than 30 minutes.

DockerSwarmServiceReplicasOutage

Severity	Critical
Summary	Docker Swarm service outage.
Description	All {{ $labels.service_name }} Docker Swarm {{ $labels.service_mode }} service replicas are down for 2 minutes.

MKEAPICertExpirationHigh

Severity	Critical
Summary	MKE API certificate expires on {{ $value | humanizeTimestamp }}
Description	The SSL certificate for MKE API expires on {{ $value | humanizeTimestamp }}, less than 10 days are left.

MKEAPICertExpirationMedium

Severity	Major
Summary	MKE API certificate expires on {{ $value | humanizeTimestamp }}
Description	The SSL certificate for MKE API expires on {{ $value | humanizeTimestamp }}, less than 30 days are left.

MKEAPIDown

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

MKEAPIOutage

Severity	Critical
Summary	MKE API is down.
Description	The MKE API (port 443) is not accessible for the last 1 minute.

MKEContainersUnhealthy

Severity	Major
Summary	MKE containers are Unhealthy.
Description	{{ $value }} MKE {{ $labels.name }} containers are Unhealthy.

MKEManagerAPITargetsOutage

Severity	Critical
Summary	MKE manager API cluster Prometheus targets outage.
Description	Prometheus fails to scrape metrics from 2/3 of MKE manager API nodes.

MKEMetricsControllerTargetsOutage

Severity	Critical
Summary	MKE metrics controller Prometheus targets outage.
Description	Prometheus fails to scrape metrics from all MKE metrics controller endpoints.

MKEMetricsEngineTargetDown

Severity	Major
Summary	MKE metrics engine Prometheus target is down.
Description	Prometheus fails to scrape metrics from the MKE metrics engine on the {{ $labels.node }} node.

MKEMetricsEngineTargetsOutage

Severity	Critical
Summary	MKE metrics engine Prometheus targets outage.
Description	Prometheus fails to scrape metrics from the MKE metrics engine on all nodes.

MKENodeDiskFullCritical

Severity	Critical
Summary	MKE node disk is 95% full.
Description	The {{ $labels.node }} MKE node disk is 95% full.

MKENodeDiskFullWarning

Severity	Warning
Summary	MKE node disk is 85% full.
Description	The {{ $labels.node }} MKE node disk is 85% full.

MKENodeFlapping

Available since MOSK 25.1 and MOSK management 2.29.0

Severity	Major
Summary	MKE node is flapping.
Description	The {{ $labels.node }} MKE node state flapped more than 3 times for the last 10 minutes.

MKENodeDown

Severity	Critical
Summary	MKE node is down.
Description	The {{ $labels.node }} MKE node is down.