⚙️ What Are Helm Jobs and How to Use Them When deploying applications in Kubernetes with Helm, sometimes you need to run a one-time task — like initializing a database, migrating data, or running cleanup scripts. That’s where Helm Jobs come in. 🧩 What Is a Helm Job? A Helm Job is just a regular Kubernetes Job resource defined inside a Helm chart. It runs once (or until success), unlike Deployments or StatefulSets that keep running. ...
Helm include vs template — What’s the Difference and When to Use Each Helm provides two commonly used functions for rendering reusable templates: template and include. At first glance, they seem similar — both insert one template inside another — but there’s a subtle and important difference. Let’s break it down simply and clearly. 🔍 Key Difference Fucnction Return Difference template Nothing (Renders the template directly into the output.) For direct insert of tempaltes include String more flexible — can modify output 📘 Example 1 template template function just inserts content of teplate in current output. ...
kube-apiserver Not Starting: Troubleshooting Guide The kube-apiserver is the heart of any Kubernetes cluster. If it doesn’t start, the entire control plane is effectively down — meaning kubectl and controllers won’t work. Let’s go through common causes and fixes. Symptoms kubectl commands fail with connection errors. In kubectl get pods -n kube-system, the kube-apiserver pod is CrashLoopBackOff or not running. Logs may contain messages like etcd connection refused, failed to listen on port 6443, or certificate errors. Common Causes and Fixes 1. Port Conflicts The API server binds to 6443 by default. If another process is already listening there, kube-apiserver won’t start. ...
Kubernetes Flag: max-endpoints-per-slice Explained When Kubernetes services scale to hundreds or thousands of pods, managing their network endpoints efficiently becomes critical. This is where EndpointSlices come in. And one of the key tuning knobs for EndpointSlices is the max-endpoints-per-slice flag. What Is max-endpoints-per-slice? By default, Kubernetes groups pod endpoints into EndpointSlices (instead of one big Endpoints object). Each slice holds up to N endpoints (default: 100). The flag --max-endpoints-per-slice defines that maximum number. In simple words: it controls how many pod addresses go into a single EndpointSlice. ...
What is NodePort in Kubernetes? When you deploy an application in Kubernetes, by default it’s only accessible inside the cluster. To make it available outside, you need to expose it. One of the simplest ways to do this is with a NodePort service. How NodePort Works Kubernetes opens a port (30000–32767) on each node of the cluster. Any request sent to <NodeIP>:<NodePort> is forwarded to the service and then to the pods. Under the hood, it still uses ClusterIP, but adds an external entry point. So you can access your app like: ...