• Discribtion
• Kubernetes architecture
• How to deploy
• How to upgrade

Infrastructure is deployed in kubbernetes consist from 3 server

1. kubernetes
2. reverse proxy
3. nfs

  admin-app   : containin admin application (pod) 
  backend-api : contain backend api application (pod)  
  database    : contain sql server database version 17
  kube-system : contain k8s pod itself
  nfs-storage : for nfs provision storage
  traefik     : for ingress controller
  portal      : contain portal appplication

• Master : manage kuberneets cluster and contain system component

• Worker01 : for deploying applications (pod) on it

• Reverse proxy + nfs : contain haproyx as reverse proxy to forward traffic from outside into k8s cluster it's configuration resides in /etc/haproxy/haproxy.cfg if you wat to add mode nodes you can do it through backend sections

• Nfs Storage : on the same reverse proxy server the data located in /srv/kubernetes/ you can display exposed folder by running command : exportfs -v or showmount -e

• traefik : to redirect traffic from reverse cluster to the application in a pod each application deployed in k8s cluster have ingress rule and also (admin + portal + api ) have ingress rule ingress rule is namespaced for example if you want to get ingress rule for admin by running this command : kubectl get ingress

the applications are deployed by Helm Charts so you can edit values.yaml to change the tag of the image to new one

• to install application in k8s and run this command: helm install (Release name) -n (name space)
• to upgrade application by helm helm upgrade (Release name) -n (name space)
• to remove application by helm helm uninstall (Release name) -n (name space)