Kubernetes Troubleshooting Guide covers:

Introduction

• Why Kubernetes Troubleshooting is Critical

Pod and Container Issues

1. Pod Stuck in Pending / Not Starting (Scheduling Issues)
2. CrashLoopBackOff (Pod Constantly Restarting)
3. OOMKilled (Out Of Memory Killed, Exit Code 137)
4. ImagePullBackOff / ErrImagePull (Cannot Pull Container Image)
5. CreateContainerConfigError / CreateContainerError (Pod Cannot Be Created Properly)

Node and Cluster Issues

1. Node Not Ready (Node in NotReady State)
2. Node Resource Pressure & Pod Evictions (DiskPressure, MemoryPressure, PIDPressure)
3. Kubernetes Control Plane Connectivity (API Server or Authentication Issues)

Networking Issues

1. Pod Networking (Pods Cannot Reach Each Other or External Services)
2. Service is Not Accessible (ClusterIP / NodePort / LoadBalancer)
3. DNS Resolution Problems (Pods Can’t Resolve Names or External URLs)

Storage Issues

1. PersistentVolumeClaim Stuck in Pending
2. Volume Fails to Mount or Attach (ContainerCreating Due to Volume Issues)
3. Data Loss or Inconsistent Volume After Pod Rescheduling

Access and Resource Management

1. “Forbidden” Errors (RBAC Permission Denied)
2. Resource Quota Exceeded
3. Node Capacity Limits (Max Pods Per Node, IP Exhaustion, etc.)

Wrap-Up

• GET SET GO: Preparing for Production Readiness