Kubernetes Infrastructure Monitoring

Kubernetes StatefulSet
Monitoring

Persistent Volumes, Databases & Ordered Pod Rollouts

Run databases on K8s with confidence. BigBell monitors StatefulSets, tracking Persistent Volume Claims (PVCs), ordered deployment rollouts, and the health of your stateful applications.

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Kubernetes StatefulSet Monitoring Dashboard

Overview

What is Kubernetes StatefulSet Monitoring?

Kubernetes StatefulSet monitoring tracks the controllers designed to manage stateful applications—like databases (MySQL, MongoDB) or message queues (Kafka). Unlike standard Deployments, StatefulSets require strict tracking of unique pod identities (e.g., web-0, web-1), ordered startup/shutdown sequences, and the binding of Persistent Volume Claims (PVCs) to ensure data is not lost across restarts.

Why Kubernetes StatefulSet Monitoring Matters

Running databases on K8s is risky without deep monitoring. If a StatefulSet pod crashes and restarts, it must successfully re-attach its EBS volume. If the Persistent Volume (PV) fails to mount due to cloud provider limits, the database node goes offline permanently. Furthermore, StatefulSets scale and update synchronously (one at a time). If pod 'web-1' fails to become ready, 'web-2' will never update, stalling the rollout completely.

✓Monitor the health of highly critical databases running in K8s
✓Detect failing Persistent Volume Claims (PVCs) stalling pod creation
✓Track the strict, ordered rollout sequence of StatefulSets
✓Ensure stable network identities are resolving correctly

Core Use Cases

Essential for Data Engineering teams running Kafka or Elasticsearch clusters inside Kubernetes, who need strict guarantees on disk attachment and pod startup ordering.

Features

Complete StatefulSets Monitoring Capabilities

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PVC Attachment Tracking

Alert if a StatefulSet pod is stuck in 'Pending' because its required Persistent Volume Claim cannot be provisioned or mounted.

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Ordered Rollouts

Monitor the exact progress of StatefulSet updates, catching stalls where pod 'N' fails, blocking pod 'N-1'.

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Volume Capacity

Track the disk usage of the attached Persistent Volumes to alert before your database runs out of disk space.

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Quorum Alerts

Set alerts for when the number of Ready Replicas drops, endangering the quorum of distributed databases like Zookeeper.

FAQ

Frequently Asked Questions

Most often, it is waiting for a Persistent Volume. BigBell tracks PVC events to show you if the cloud provider (e.g., AWS EBS) failed to provision the disk or if it's attached to the wrong node.

StatefulSets scale strictly in order. If you scale from 2 to 3, pod-2 must be completely Running and Ready before K8s will even attempt to create pod-3.

BigBell monitors the K8s infrastructure out-of-the-box. To monitor the specific database (e.g., MySQL queries), you deploy a sidecar exporter, which BigBell natively ingests.

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