kubernetes basic commands

k8s

## List environments

kubectl exec $pod -- env

## Run bash interactive shell inside some pod

kubectl exec -ti $pod -- bash

## Services

1 - ClusterIP

This type exposes the service on internal IP. Only reachable from within the cluster.

2 - NodePort

Makes service available from outside the cluster using NodeIP:NodePort

3 - LoadBalancer

Creates a load balancer in current cloud and assigns a fixed exteranl IP to the service.

4 - ExternalName

Maps the service to the contents of `ExternalName` field by returning `CNAME` record with its value.