33 posts tagged with "Kubernetes"

Your pod gets killed with OOMKilled and you have no idea why. Or your app crawls because Kubernetes is throttling its CPU to a fraction of what it needs. Resource management is one of the most misunderstood areas in Kubernetes, and getting it wrong means wasted money, poor performance, or unexpected crashes.

Your Kubernetes manifests live in a Git repository. Your CI pipeline builds images and updates tags. But who applies those manifests to the cluster? If the answer is "someone runs kubectl apply" or "the CI pipeline has cluster credentials," you have a deployment process that is fragile, hard to audit, and impossible to roll back cleanly. GitOps fixes all of this by making Git the single source of truth for your entire deployment state.

Your pod shows Running status, but the app inside crashed five minutes ago. Users get 502 errors while Kubernetes happily reports everything is fine. Without health probes, Kubernetes has no idea whether your application is actually working — it only knows the process is alive.

Your app works locally, but the moment you deploy to Kubernetes, the frontend cannot reach the backend. You run curl from inside a pod and get nothing. DNS resolution fails. Network policies silently drop traffic. Kubernetes networking is powerful, but if you do not understand the fundamentals, you will spend hours debugging what should be a five-minute fix.

Your cluster is running in production. Three teams share it. A junior developer accidentally deletes a Deployment in the production namespace. Sound familiar? This is what happens when everyone has cluster-admin. RBAC exists to make sure every user and every service account has exactly the permissions they need — and nothing more.

You just deployed an NGINX ingress controller with one Helm command and it provisioned a Deployment, a Service, a ConfigMap, an IngressClass, RBAC roles, and a ServiceAccount — all wired together correctly. Imagine writing those 400+ lines of YAML by hand. That is the problem Helm solves.