@kodekloud: Can you debug a Kubernetes DNS failure in 2 commands? 👇 Most engineers can't. Here's the trick senior SREs use 👇 If your first instinct is to dive into CoreDNS logs — stop. There's a 2-command test that tells you exactly where the problem is before you waste 30 minutes debugging. Run these inside the broken pod: 1. nslookup kubernetes.default 2. nslookup google.com The pass/fail pattern is your map: 🔴 Both fail → cluster DNS or firewall issue 🟡 Internal works, external fails → CoreDNS forwarding broken 🟠 Internal fails, external works → wrong DNS server in /etc/resolv.conf 🟢 Both work but slow → DNS isn't broken, it's overloaded Also watch HOW it fails: - "No such host" = name doesn't exist - "Timeout" = never reached the DNS server Save this for your next K8s outage 🔖 Part 2 coming — when cluster DNS itself is dead. #kubernetes #k8s #devops #coredns #kubernetesdns #kubernetestutorial #devopsinterview #kubernetesinterview #cloudnative #sre #kubectl #cka #ckad #kubernetestips #devopsengineer #containerization #k8stutorial #cloudengineer #kubernetesshorts #kubernetestroubleshooting

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Thursday 28 May 2026 16:12:11 GMT