Kubernetes Infrastructure Monitoring

Kubernetes Node
Monitoring

Disk Pressure, Memory Evictions & Kubelet Tracking

Keep the foundation of your Kubernetes cluster strong. BigBell monitors individual worker nodes, detecting disk pressure, memory exhaustion, and failing kubelets before they cause cascading pod failures.

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Overview

What is Kubernetes Node Monitoring?

Kubernetes Node monitoring focuses on the physical or virtual machines (EC2, VMs, bare metal) that make up your cluster. It tracks the standard OS metrics (CPU, Memory, Disk IO, Network) but specifically in the context of Kubernetes. It monitors the Node Condition statuses (Ready, DiskPressure, MemoryPressure, PIDPressure) and the health of the critical 'kubelet' agent running on the node.

Why Kubernetes Node Monitoring Matters

When a node fails, all pods running on it must be rescheduled, causing temporary application degradation. Worse, if a node experiences 'MemoryPressure' but doesn't fully crash, the kubelet will aggressively evict running pods to save the OS, causing chaotic application behavior. By monitoring nodes, you can detect a full disk (DiskPressure) or a memory leak in the OS before Kubernetes starts ruthlessly killing your application pods.

✓Stop random pod evictions by predicting MemoryPressure conditions
✓Detect full disks (DiskPressure) preventing new pod scheduling
✓Identify 'NotReady' nodes caused by network partitions or dead kubelets
✓Correlate noisy neighbor pods that are hogging a node's resources

Core Use Cases

Critical for teams managing on-premise Kubernetes or self-managed worker nodes in the cloud, where underlying hardware failures or OS-level misconfigurations are common causes of cluster instability.

Features

Complete Nodes Monitoring Capabilities

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Deep OS Metrics

Monitor exactly how much of a node's CPU and Memory is consumed by Kubernetes vs the underlying host OS.

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Storage Saturation

Track ephemeral storage usage and trigger alerts before DiskPressure stops image pulls and pod scheduling.

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Kubelet Health

Continuously ping the Kubelet API. If the Kubelet stops responding, the node will drop to a NotReady state.

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Node Condition Alerts

Instantly route critical Node Condition alerts (like NetworkUnavailable) directly to your infrastructure on-call team.

FAQ

Frequently Asked Questions

The kubelet begins an eviction process, aggressively terminating pods based on their QoS class (BestEffort pods die first) in an attempt to reclaim memory and prevent the entire node from crashing.

Usually, this means the Kubernetes control plane hasn't heard from the node's Kubelet in a while. This can be caused by a dead kubelet process, a network partition, or 100% CPU lockup on the node.

Yes, BigBell deploys a lightweight DaemonSet that runs on every node to collect deep OS metrics and container telemetry.

Master Your Nodes Metrics Today

Start monitoring nodes performance in minutes. Prevent downtime before it happens.