Kubernetes Troubleshooting & Fix Guides

Fix the Helm 'UPGRADE FAILED: has no deployed releases' error when a previous install failed and left the release in a broken state.

Clean up Kubernetes evicted pods and fix the underlying disk pressure or resource exhaustion that causes pod evictions.

Resolve ImagePullBackOff and ErrImagePull errors in Kubernetes — fix registry credentials, image tags, and network access issues.

Diagnose and fix OOMKilled errors in Kubernetes pods — understand memory limits, identify leaks, and configure resource requests correctly.

A systematic approach to debugging CrashLoopBackOff in Kubernetes, covering the most common causes and the exact commands to diagnose each one.

Let me be direct with you: most Kubernetes clusters I audit are hemorrhaging money because of poorly configured resource requests. I've seen teams running...

Set up and manage a production Kubernetes cluster on Alibaba Cloud ACK (Container Service for Kubernetes). Covers cluster types, node pools, SLB ingress, RRSA workload identity, Container Registry, and Terraform configuration.

Step-by-step guide to launching a production-ready EKS cluster on AWS — node groups, IAM roles, VPC configuration, managed add-ons, kubeconfig setup, and cost optimization. Both eksctl and Terraform approaches covered.

Deploy a production AKS cluster on Azure — node pools, managed identities, Azure CNI, RBAC integration with Entra ID, ACR integration, autoscaling, monitoring with Azure Monitor, and Terraform setup.

Launch a production GKE cluster on Google Cloud Platform — Autopilot vs Standard mode, node pools, Workload Identity, Binary Authorization, GKE Dataplane V2, private clusters, and Terraform configuration.

Configure Jenkins to dynamically spin up Kubernetes pods as build agents. Covers the Kubernetes plugin, pod templates, JNLP agents, multi-container pods, resource limits, and RBAC — so you never manage static build nodes again.

Set up Vault's Kubernetes auth method so pods authenticate using their ServiceAccount tokens — then inject secrets via Vault Agent sidecar or the Vault Secrets Operator. Zero hardcoded credentials in your cluster.

How to use Istio's built-in observability — distributed tracing with Jaeger, Prometheus metrics, Kiali service graph — and enforce zero-trust access control with AuthorizationPolicies.

A practical guide to getting started with Istio — installing on Kubernetes, enabling automatic mTLS, configuring VirtualServices for traffic management, and understanding the sidecar injection model.

Deploy and operate production workloads on Alibaba Cloud Container Service for Kubernetes with autoscaling, SLB ingress, and ARMS monitoring.

Stand up a production-grade AKS cluster with autoscaling, RBAC, monitoring, and private networking in under 15 minutes.

Deploy production workloads on GKE Autopilot — serverless Kubernetes with automatic node management, security, and scaling.

Side-by-side comparison of ArgoCD and Flux for GitOps on Kubernetes — architecture differences, sync behavior, multi-cluster, and when to choose each.

Practical Helm chart best practices covering directory structure, versioning strategies, and templating patterns for production-grade charts.

Learn how to use Helm hooks for database migrations and pre-deploy tasks, and chart tests to validate releases in Kubernetes.

Use Helmfile to declaratively manage multiple Helm releases across environments, with layered values, dependencies, and GitOps-friendly workflows.

A hands-on guide to deploying and operating Kafka on Kubernetes using the Strimzi operator — covering cluster config, topic management, and TLS security.

How to implement zero-trust pod-to-pod communication in Kubernetes using NetworkPolicies — deny by default, allow explicitly, and validate it works.

Configure Prometheus Kubernetes service discovery to automatically scrape pods, services, and nodes — no manual target management.

A comprehensive guide to every Kubernetes deployment strategy — rolling updates, blue-green, canary, and progressive delivery with Argo Rollouts and Flagger.

Harden Kubernetes clusters for production with RBAC, network policies, pod security standards, secrets management, and admission controllers.

Build a production Prometheus and Grafana monitoring stack from scratch — service discovery, recording rules, alerting, and dashboards.

Security headers and configuration reference — copy-paste snippets for Nginx, Kubernetes Ingress, Cloudflare, and Helmet.js.

Install Istio on Kubernetes, understand the control plane architecture, deploy your first sidecar proxy, and configure namespace injection.

Inject HashiCorp Vault secrets into Kubernetes pods using the Agent Injector and CSI provider — with practical examples for database credentials and TLS certificates.

Configure ArgoCD Image Updater to automatically detect and deploy new container images to Kubernetes without manual manifest changes or CI triggers.

How to use Crossplane to provision and manage cloud infrastructure using Kubernetes-native APIs — one control plane to rule them all.

Deploy Kubecost for real-time Kubernetes cost monitoring with namespace-level showback, idle cost detection, and actionable Slack alerts.

A practical comparison of Kubernetes Ingress and Gateway API, with a migration strategy that won't take down your production traffic.

A deep dive into Kubernetes resource requests, limits, QoS classes, and why getting them wrong leads to OOM kills, throttling, and wasted money.

How to configure encryption at rest for Kubernetes secrets using KMS providers, because your secrets in etcd are stored in plaintext by default.

Deploy Grafana Loki and Promtail for cost-effective, scalable log aggregation — without indexing yourself into bankruptcy.

Deploy OPA Gatekeeper to enforce Kubernetes admission policies — block privileged containers, enforce labels, and prevent misconfigurations.

Deploy and configure the OpenTelemetry Collector to unify traces, metrics, and logs into a single pipeline — with production-tested patterns.

Use Mozilla SOPS to encrypt secrets in Git for secure GitOps workflows. Covers AGE, AWS KMS, and ArgoCD integration with real examples.

How to configure Kubernetes HPA with Prometheus custom metrics so your workloads scale on what actually matters — not just CPU and memory.

How to implement zero-trust networking in Kubernetes using NetworkPolicies — deny by default, allow by exception, and sleep better at night.

The kubectl quick reference — organized by task with copy-paste ready commands for pods, deployments, services, debugging, and more.

Learn everything about Kubernetes Pod Security Standards (PSS) and Pod Security Admission (PSA) — from baseline to restricted profiles with practical examples.

Practical ArgoCD patterns for managing dozens of applications — from App of Apps to ApplicationSets to multi-cluster rollouts. All in code, obviously.

Battle-tested patterns for writing Helm charts that survive production — covering values design, template structure, lifecycle hooks, and chart testing.

Implement least-privilege RBAC in Kubernetes to prevent lateral movement and privilege escalation — with real threat models and pipeline-ready examples.

Integrate HashiCorp Vault with Kubernetes to eliminate static secrets from your cluster — with working manifests, threat models, and pipeline automation.

A battle-tested guide to running Kubernetes workloads on spot instances — safely, reliably, and at 60-90% less than on-demand pricing.