kubectl port-forward script

kubectl-port-forward.sh

SVC=<service-name>
S_PORT=8000
D_PORT=8000

kubectl port-forward deployment/${SVC} $S_PORT:$D_PORT &
PID_PORTF=$!

# Wait for $S_PORT to become available
# This is required as port-forwarding is not instant
while ! nc -vz localhost "$S_PORT" > /dev/null 2>&1 ; do
    echo "Waiting for $S_PORT:$D_PORT port-forwaring to be up..."
    sleep 1
done

# Kill port-foward regardless of how script exits
trap '{
  echo "Stopping port-forwading and killing PID $PID_PORTF"
  kill $PID_PORTF
}' EXIT