[Get elasticbeanstalk's ec2 private ip list]

find_eb_ec2_private_ip.sh

#!/usr/bin/env bash

beantalkEnvName="$1"

echo "target beanstalk env name: ${beantalkEnvName}"


## fetch ec2 list 
getEc2IpList () {
  ec2List=$(aws elasticbeanstalk describe-environment-resources --environment-name ${beantalkEnvName} | python -m json.tool | python -c 'import sys, json; li = json.load(sys.stdin)["EnvironmentResources"]["Instances"]; ec2List = [ dat.values() for dat in li ]; flat_list = [item for sublist in ec2List for item in sublist]; strlist = map(str, flat_list); print " ".join(strlist)')

  echo "${beantalkEnvName}'s ec2 id list"

  ipListStr=$(aws ec2 describe-instances --instance-ids $ec2List --query "Reservations[*].Instances[*].PrivateIpAddress")

  ipListWithDelimeter=$(echo $ipListStr | python -m json.tool | python -c 'import sys, json; li = json.load(sys.stdin); flat_list = [item for sublist in li for item in sublist]; strlist = map(str, flat_list); print ", ".join(strlist)')
  
  IFS=', ' read -r -a ip2Array <<< "$ipListWithDelimeter"

  for ec2ip in "${ip2Array[@]}"
  do
     :
     echo $ec2ip
     # do whatever on $i
  done
}

getEc2IpList



# ex) user@ip-192-31-35-19:~$ ./getPrivateIpList.sh dsp2
# target beanstalk env name: eb1
# eb1's ec2 id list
# 172.39.22.111