HAProxy stats to StackDriver using a shell script

hastats.sh

# run this every minute from cron as a quick and dirty solution to get some
# haproxy stats on each of your listeners over to stackdriver

instance=$(curl -s "http://169.254.169.254/latest/meta-data/instance-id")

# while [	1 ]; do
  cp /dev/null /tmp/hastats.json
  echo 'show stat' | socat - UNIX-CLIENT:/tmp/haproxy.sock \
    |while IFS=',' read pxname svname qcur qmax scur smax slim stot bin bout dreq \
        dresp ereq econ eresp wretr wredis status weight act bck chkfail chdown lastchg \
        downtime qlimit pid iid sid throttle lbtot tracked type rate rate_lim rate_max \
        check_status check_code check_duration hrsp_1xx hrsp_2xx hrsp_3xx hrsp_4xx \
        hrsp_5xx hrsp_other hanafail req_rate req_rate_max req_tot cli_abrt srv_abrt; do
      [ "$svname" != 'BACKEND' ] && continue
        echo '{"timestamp": '"$(date +%s)"', "proto_version": 1, "data": [
          { "name":"haproxy::'$pxname'::req_rate", "value":'${rate:-0}', "instance":"'${instance}'", "collected_at":'"$(date +%s)"' },
          { "name":"haproxy::'$pxname'::scur", "value":'${scur:-0}', "instance":"'${instance}'", "collected_at":'"$(date +%s)"' }
        ]}' >> /tmp/hastats.json

        echo $'Sending data'
        cat /tmp/hastats.json

        curl -X POST \
          -H "x-stackdriver-apikey: <your_key_here>" \
          -H "Content-Type: application/json" \
                --data @/tmp/hastats.json \
          https://custom-gateway.stackdriver.com/v1/custom

        echo $'\n'
    done

#  sleep 10

#done