Tuneling RDS through K8S

k8s-jumpbox.sh

#!/usr/bin/env bash

set -e

TEMP_POD_NAME=postgres-jump-server
LOCAL_PORT=5433
REMOTE_HOST=<postgres-host>
REMOTE_PORT=5432

function cleanup {
  echo ""
  kubectl delete pod/$TEMP_POD_NAME --grace-period 1 --wait=false
}
trap cleanup EXIT

kubectl run --restart=Never --image=alpine/socat $TEMP_POD_NAME -- -d -d tcp-listen:$REMOTE_PORT,fork,reuseaddr tcp-connect:$REMOTE_HOST:$REMOTE_PORT
kubectl wait --for=condition=Ready pod/$TEMP_POD_NAME
kubectl port-forward pod/$TEMP_POD_NAME $LOCAL_PORT:$REMOTE_PORT