nginx upstream status in your terminal...

lbwatch

#!/bin/bash -ue

domain="customer.com"
environment=$( facter -p customer_env )
proto="http"
lb_host="web1.${environment}.${domain}"
## uri of exposed nginx upstream status with format csv
nginx_upstream_uri="/lb?format=csv"
interval=1

function print_usage() {
  cat <<EOF
Usage: ${0} [-h|-H <lb_host>|-e <environment>|-n <seconds>|-p <proto>|-s <nginx upstream csv stub>]
  -h    Halp.
  -H    nginx lb host - host.example.com. Default: ${lb_host}
  -e    Environment. Default: ${environment}
  -n    Update interval. Default: ${interval}
  -p    Protocol. Default: ${proto}
  -s    Nginx upstream status stub in format csv. Default: ${nginx_upstream_uri}

Example:
  ${0}
  ${0} -n 5
EOF
}

while getopts hH:e: o
do
  case $o in
    h)
      print_usage ;;
    H)
      lb_host=$OPTARG ;;
    e)
      environment=$OPTARG ;;
    n)
      interval=$OPTARG ;;
    p)
      proto=$OPTARG ;;
  esac
done
shift $(($OPTIND-1))

case $environment in
  "dev"|"test"|"prod")
    header="${domain^} ${environment^} Environment: LB status" ;;
  *)
    echo "Unknown environment ${environment}. Exiting..."
    exit 1
    ;;
esac

while :; 
do
  # XXX: align fields properly...
  printf "%s\n" "${header:-}"
  printf "id\tpool\tserver:port\tstatus\trise\tfall\tport\n"
  curl -k -s ${proto}://${lb_host}${nginx_upstream_uri} | sed 's/,/\t/g'
  sleep ${interval}
  printf '\033c'
done