create a proxy and do port forward on top of kubernetes/openshift

portforward

#!/bin/bash

doPortForward() {
    ns=$1
    ip=$2
    port=$3
    listen_port=`awk -F ':' '{print $1}' <<< "$port"`
    container_port=`awk -F ':' '{print $2}' <<< "$port"`
    container_port=${container_port:-$listen_port}
    target_port=$4 || `shuf -i 2000-65000 -n 1`
    ipescaped=`echo $ip | sed 's/\./-/g'`
    oc login --username mhewedy
    oc project apps-tamt-$ns
    cat <<EOF | oc apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: socat-$ipescaped-$container_port
spec:
  containers:
  - name: socat-$ipescaped-$container_port
    image: alpine/socat
    command: ["socat", "-dd", "tcp4-listen:$container_port,fork,reuseaddr", "tcp4:$ip:$listen_port"]
    ports:
      - containerPort: $container_port
EOF
    oc port-forward socat-$ipescaped-$container_port $target_port:$container_port

}


case $1 in
  dbdev)
    doPortForward dev 100.3.66.9 1433 11433
    ;;
  dbqa)
    doPortForward qa 120.3.193.14 1433 11433
    ;;

  *)
    if [ "$#" -ne 4 ]; then
      echo -e "Usage \n$(basename $0) <dbdev|dbqa>"
      echo "$(basename $0) - <ns> <ip> <port>"
      echo "$(basename $0) - <ns> <ip> <listen_port>:<container_port>"
      exit -1
    fi

    doPortForward $2 $3 $4
    ;;
esac