K8S Nginx Hot Reloader

Know-Why

• share-process-namespace
  • Processes are visible to other containers in the pod.
  • Container filesystems are visible to other containers in the pod through the /proc/$pid/root link.
• SideCar Container
• Go program
  • kill -HUP pid.
  • Watch nginx config dirs.
  • Event debounce.
• configmap updated automatically

How-Use

• example nginx-reloader.yml
• enable shareProcessNamespace
• TIME_AFTER_SECONDS, Event debounce default second.
• WATCH_DIRS, split by comma, like /etc/nginx,/etc/nginx/conf.d