ssh via EC2 Instance Name tag

ssh_via.sh

#!/usr/bin/env bash
set -euo pipefail
IFS=$'\n\t'

function find_ip () {
  aws --region us-west-2 \
    ec2 describe-instances --filters \
      "Name=tag:Name,Values=${1}" \
      "Name=instance-state-name,Values=running" | \
  jq -rc '.Reservations | map(.Instances) | map(map(.PrivateIpAddress)) | flatten | flatten | .[0]'
}

JUMP_BOX_IP=$(find_ip ${1})
if [ "${JUMP_BOX_IP}" == "null" ]; then
  echo "No instance by the name \"${1}\" exists. Are you using the right account?" > /dev/stderr
  exit 1
fi
shift
ssh -t $JUMP_BOX_IP "$@"