Port usage

This document includes the port used by system components, so we can avoid port collisions.

See also pkg/wellknownports/wellknownports.go

Port	Description
22	SSH
443	Kubernetes API
179	Calico
2380	etcd main peering
2381	etcd events peering
3988	kops controller serving port
3989	node local dns health check
3990	Kube API health check
3991	etcd-manager - cilium - grpc
3992	etcd-manager - cilium - quarantined
3993	dns gossip - dns-controller - memberlist
3994	etcd-manager - main - quarantined
3995	etcd-manager - events - quarantined
3996	etcd-manager - main - grpc
3997	etcd-manager - events - grpc
3998	dns gossip - protokube - weave mesh
3999	dns gossip - dns-controller - weave mesh
4000	protokube gossip member list
4001	etcd main client
4002	etcd events client
4789	VXLAN
6942	Cilium operator prometheus port
9090	Cilium prometheus port
9091	Cilium hubble prometheus port