Docker Swarm

This section describes the alerts for the Docker Swarm service.

• DockerSwarmNetworkUnhealthy

• DockerSwarmNodeFlapping

• DockerSwarmServiceReplicasDown

• DockerSwarmServiceReplicasFlapping

• DockerSwarmServiceReplicasOutage

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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

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 10 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.