script to test connectivity to all nodes in a mongodb cluster

ping_mongodb_cluster.sh

#!/usr/bin/env bash

readarray -t mongo_cluster <<< "$(dig +short srv _mongodb._tcp.example.com | awk '{print $4}')"

function ping_cluster() {
  a=("$@")
  for i in "${a[@]}"
  do
    nc -w 3 -z -v "$i" 27017
  done
}

ping_cluster "${mongo_cluster[@]}"