* 参考 *
https://docs.k3s.io/architecture
https://ithelp.ithome.com.tw/users/20121071/ironman/2820?page=1
https://www.fullstaq.com/knowledge-hub/blogs/setting-up-your-own-k3s-home-cluster
K3S as Kubernetes distribution
MetalLB as load balancer
Rancher as cluster management
Traefik as ingress controller
Cert-Manager as certificate manager