c12s-kubespray/examples/kubernetes/expose-services

Examples how to expose k8s services

Exposing dashboard via frontend and externalIPs

• Edit kubernetes-dashboard.yaml and update externalIPs to the list of external IPs of your k8s minions

• Run:

kubectl create -f kubernetes-dashboard.yaml --namespace=kube-system

• Access:

curl $ANY_MINION_EXTERNAL_IP:9090

Exposing dashboard via nodePort

• Get nodePort of the service:

echo $(kubectl --namespace=kube-system get svc/kubernetes-dashboard -o go-template='{{(index .spec.ports 0).nodePort}}')

• NAT on your router/jump-box to any k8s minion public IP and nodePort to provide external access:

iptables -t nat -I PREROUTING -p tcp --dport 9090 -j DNAT --to-destination 10.210.0.12:32005
iptables -t nat -I POSTROUTING -d 10.210.0.12 ! -s 10.210.0.0/24 -j MASQUERADE
iptables -I FORWARD -d 10.210.0.12 -j ACCEPT

Where 10.210.0.12 is public IP of one of your k8s minions and 32005 is nodePort of kubernetes-dashboard service.

• Access:

curl 10.210.0.12:9090