Unlock Kubernetes Insights: Master Event Types, Monitoring, and Alerting

For modern engineering teams, alert fatigue is a real problem, and many open‑source and third‑party tools claim to solve it. One of the most effective alternatives is built right into the Kubernetes API: Kubernetes events.

Kubernetes events provide clear insight into cluster health and performance without overwhelming noise. This article covers event types, how to access and store them, and suggests useful alerts for teams of any size.

What are Kubernetes events? Types and examples

Kubernetes events are objects that describe what is happening in a cluster, node, pod, or container. They are generated by core components when changes occur and are recorded by the API server, usually accompanied by a log message but otherwise independent.

By default, events are deleted after a short period (typically within an hour), so important events must be observed and collected promptly.

Accessing events

kubectl get event

The output looks like this:

Many events are triggered by node state changes, each with a Reason field that helps identify the event type. Common categories include:

Failure events

Generated when creating containers or other resources fails (e.g., FailedToCreateContainer, FailedToStartContainer, FailedToPullImage, FailedToKillPod). Monitoring these is essential because they often cause application outages.

Eviction events

Occur when Kubernetes evicts rogue containers or pods that consume excessive resources. Frequent evictions indicate missing resource thresholds or mis‑configured eviction policies.

Node‑related events

Include NodeHasSufficientMemory, NodeHasSufficientPID, NodeReady, etc., and help trace instability back to node lifecycle changes.

Storage‑related events

Events such as FailedMount and FailedAttachVolume reveal problems mounting storage resources for pods.

Scheduling events

Scheduling failures (e.g., FailedScheduling) indicate insufficient CPU or memory for new pods.

Accessing Kubernetes events

To view events for a specific pod: kubectl describe <podname> To list non‑normal events:

kubectl get events --field-selector type!=Normal

For large‑scale analysis, export events as JSON: kubectl get events -o json This JSON can be imported into visualization tools for deeper insight.

How to collect and store events

Native watch and export

Continuously stream events to the terminal: kubectl get events --watch Pair this with a logging operator (e.g., Banzai Cloud) for analysis.

KubeWatch

KubeWatch is an open‑source tool that streams Kubernetes activity to third‑party services and webhooks, such as Slack or Prometheus.

Event Exporter

Kubernetes Event Exporter continuously watches events, extracts metrics (event count, unique event count), and provides basic monitoring.

EventRouter

EventRouter forwards Kubernetes events to multiple destinations but requires external storage and analysis tools for full functionality.

Common warning events

Focus on failure and scheduling events, as ignoring them can break applications. Eviction events can usually be set to low priority. Node‑ and storage‑related events should be selected manually for alerts.

Alerts can be sent via webhooks, Slack, or integrated with Prometheus Alertmanager. SaaS solutions like ContainIQ also offer advanced alerting and correlation with other metrics.

Summary

Kubernetes events are a powerful way to monitor cluster health and activity, especially when combined with a solid alerting strategy and a suite of tools for collection, storage, and analysis.

References

Banzai Cloud: https://github.com/banzaicloud/logging-operator

KubeWatch: https://github.com/bitnami-labs/kubewatch

Kubernetes Event Exporter: https://github.com/caicloud/event_exporter

EventRouter: https://github.com/heptiolabs/eventrouter

AlertManager: https://prometheus.io/docs/alerting/latest/alertmanager/

ContainIQ: https://www.containiq.com/kubernetes-monitoring