Kubernetes DNS Not Working: How to Fix CoreDNS Failures in Production
Pods can't resolve hostnames? Getting NXDOMAIN or 'no such host' errors? Here's how to diagnose and fix CoreDNS issues in Kubernetes step by step.
In-depth guides on Docker, Kubernetes, AWS, CI/CD, AI/ML, and modern infrastructure — written by engineers, for engineers.
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Pods can't resolve hostnames? Getting NXDOMAIN or 'no such host' errors? Here's how to diagnose and fix CoreDNS issues in Kubernetes step by step.
AI agents are moving beyond alerting into autonomous incident detection, root cause analysis, and remediation. Here's why Agentic SRE will fundamentally change how we handle production incidents.
A step-by-step tutorial on setting up Crossplane to provision and manage cloud infrastructure directly from Kubernetes. Build a self-service platform where developers can request AWS, GCP, or Azure resources through kubectl.
ImagePullBackOff is one of the most common Kubernetes errors. This guide covers every root cause — wrong image names, missing auth, network issues, rate limits — with step-by-step debugging and fixes.
A comprehensive guide to software supply chain security in 2026 — covering SBOMs, the SLSA framework, artifact signing with Cosign and Sigstore, and how to implement it all in your CI/CD pipeline.
AWS CloudWatch is the central monitoring service for everything running on AWS. This guide covers metrics, logs, alarms, dashboards, Container Insights, and production best practices.
cert-manager Certificate stuck in a non-Ready state is a common Kubernetes TLS issue. This guide covers every root cause — DNS challenges, RBAC, rate limits, and issuer problems — with step-by-step fixes.
Deployment Frequency, Lead Time, MTTR, and Change Failure Rate are moving from nice-to-have to must-have. Here's why DORA metrics will define how engineering teams are evaluated in the next three years.
Flagger automates canary deployments on Kubernetes — progressively shifting traffic to new versions and rolling back automatically if metrics degrade. This step-by-step guide shows you how to set it up with Nginx Ingress.