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kube-proxy iptables Rules Explained: Kubernetes Service Routing
Posted inK8s Blog Devops

How kube-proxy Works: Kubernetes Service Routing and iptables Rules Explained

You create a Kubernetes Service, curl its ClusterIP, and somehow traffic reaches one of your Pods. There is no process listening on the Service IP. The Service IP does not…
Posted by codefy June 13, 2026
chronyc Sources Shows Reach 0? Fix Chrony Not Syncing
Posted inLinux Blog Devops

chronyc Sources Shows Reach 0? How to Fix Chrony Not Syncing in Linux

Your Linux server appears healthy, chronyd is running, and the NTP servers are listed correctly. But one detail in the output refuses to improve: MS Name/IP address Stratum Poll Reach…
Posted by codefy June 10, 2026
ulimit Not Changing for systemd Service? Fix Linux Limits
Posted inLinux Blog Devops

ulimit Not Changing for systemd Service? How to Set Correct Limits in Linux

You increase the open-file limit, restart your application, and expect the problem to disappear. Your shell reports: ulimit -n 65535 But the service still fails with: Too many open files…
Posted by codefy June 8, 2026
Chrome No Usable Sandbox in Docker: Causes and Safe Fixes
Posted inLinux Blog Devops

No Usable Sandbox When Running Chrome or Chromium in Docker

You finally get your Docker image building. Puppeteer installs successfully. Chrome or Chromium is present. Your Node.js script starts. Then the container crashes with something like this: [ERROR:zygote_host_impl_linux.cc] No usable…
Posted by codefy June 8, 2026
Kubernetes Secret Updated but Pod Still Uses Old Value? Fix It
Posted inK8s Blog Devops

Why Kubernetes Pods Still Use Old Secret Values and How to Refresh Them

You rotate a database password, update the Kubernetes Secret, and confirm that the new value is present. Five minutes later, your application is still authenticating with the old password. This…
Posted by codefy June 6, 2026
kubernetes secret volume not updating subpath
Posted inK8s Blog Devops

Kubernetes Secret Not Updating with subPath: Causes, Fixes, and Safer Alternatives

You rotate a database password, update the Kubernetes Secret, and verify that the new value exists in the API. Then you enter the running container and find the old password…
Posted by codefy June 6, 2026
migrate Kubernetes Endpoints to EndpointSlices
Posted inK8s Blog Devops

Kubernetes Endpoints Deprecated: How to Migrate to EndpointSlices

You upgrade a cluster, run a familiar command, and suddenly Kubernetes warns you: Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice Nothing may be broken yet. Your Services…
Posted by codefy July 19, 2025

Recent Posts

  • How kube-proxy Works: Kubernetes Service Routing and iptables Rules Explained
  • chronyc Sources Shows Reach 0? How to Fix Chrony Not Syncing in Linux
  • ulimit Not Changing for systemd Service? How to Set Correct Limits in Linux
  • No Usable Sandbox When Running Chrome or Chromium in Docker
  • Why Kubernetes Pods Still Use Old Secret Values and How to Refresh Them

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Trending Posts

  • kube-proxy iptables Rules Explained: Kubernetes Service Routing
    How kube-proxy Works: Kubernetes Service Routing and iptables Rules Explained
    by codefy
    June 13, 2026
  • chronyc Sources Shows Reach 0? Fix Chrony Not Syncing
    chronyc Sources Shows Reach 0? How to Fix Chrony Not Syncing in Linux
    by codefy
    June 10, 2026
  • ulimit Not Changing for systemd Service? Fix Linux Limits
    ulimit Not Changing for systemd Service? How to Set Correct Limits in Linux
    by codefy
    June 8, 2026

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