Practical articles on AI, DevOps, Cloud, Linux, and infrastructure engineering.
A node flips to NotReady and pods start disappearing. Here's the order we check things in, the usual culprits, and how to recover without making it worse.
Your cloud bill says $80k. Your cluster says nothing about which team burned it. Here's how OpenCost, Kubecost, and Cast AI actually split that number.
Hosted runners bill by the minute, and that meter never stops. Here's the break-even math on running your own, plus the tradeoffs nobody warns you about.
A pod can't reach a service by name, the app throws connection errors, and everyone blames the network. Usually it's DNS, and usually it's fixable.
A PVC stuck in Pending means nothing on the cluster can hand it a volume. Here's how we read the events and get it bound fast.
Spot cuts compute bills by 60-90%, but AWS can take the machine back in two minutes. Here's how we run real production on it without paging anyone.
Your pods are running, your Service exists, and nothing can reach it. Here's the exact order we check things when a Kubernetes Service goes dark.
A 502 from your ingress means no healthy backend to talk to. A 504 means the backend answered too slowly. Here's how to tell them apart and fix each.
A shared API key between two internal services proves nothing about who is calling. mTLS makes every service present a cryptographic identity instead.
Every crash loop leaves a number behind. Learn to read exit codes straight from kubectl describe and know the fix before you open the logs.
A pod stuck in CreateContainerConfigError means kubelet can't build the container config, almost always a ConfigMap or Secret reference that doesn't line up.
Evicted pods are the kubelet telling you a node ran out of something. Here's how to read the signal, stop the bleeding, and keep it from happening again.
