post rails metrics to datadog

README.md

rails-metrics-to-datadog

What's this project

This project provides an shell script that post rails metrics to datadog.

Usage

cd <path-to-rails>

env PROJECT=${PROJECT} DATADOG_API_KEY=${DATADOG_API_KEY} RAILS_ENV=${RAILS_ENV} rails_metrics_to_datadog.sh codestats
env PROJECT=${PROJECT} DATADOG_API_KEY=${DATADOG_API_KEY} RAILS_ENV=${RAILS_ENV} rails-metrics-to-datadog.sh dependent_gem_count
env PROJECT=${PROJECT} DATADOG_API_KEY=${DATADOG_API_KEY} RAILS_ENV=${RAILS_ENV} rails_metrics_to_datadog.sh bench_rails_runner

• via docker

- sudo docker run --rm -v ${PWD}/:<workdir>/ -e PROJECT=${PROJECT} -e DATADOG_API_KEY=${DATADOG_API_KEY} -e RAILS_ENV=${RAILS_ENV} ${AWS_ACCOUNT_ID}.dkr.ecr.ap-northeast-1.amazonaws.com/${ENV}-${PROJECT}-rails:${IMAGE_TAG} <workdir>/rails_metrics_to_datadog.sh codestats
- sudo docker run --rm -v ${PWD}/:<workdir>/ -e PROJECT=${PROJECT} -e DATADOG_API_KEY=${DATADOG_API_KEY} -e RAILS_ENV=${RAILS_ENV} ${AWS_ACCOUNT_ID}.dkr.ecr.ap-northeast-1.amazonaws.com/${ENV}-${PROJECT}-rails:${IMAGE_TAG} <workdir>y/rails_metrics_to_datadog.sh dependent_gem_count
- sudo docker run --rm -v ${PWD}/:<workdir>/ -e PROJECT=${PROJECT} -e DATADOG_API_KEY=${DATADOG_API_KEY} -e RAILS_ENV=${RAILS_ENV} ${AWS_ACCOUNT_ID}.dkr.ecr.ap-northeast-1.amazonaws.com/${ENV}-${PROJECT}-rails:${IMAGE_TAG} <workdir>/rails_metrics_to_datadog.sh bench_rails_runner

rails-metrics-to-datadog.sh

#!/bin/sh

post_metrics_datadog() {
  metrics="$1"
  val="$2"
  currenttime=$(date +%s)
  curl -s -X POST -H "Content-type: application/json" \
  -d "{ \"series\" :
          [{\"metric\":\"${metrics}\",
           \"points\":[[$currenttime, ${val}]],
           \"type\":\"gauge\",
           \"host\":\"${PROJECT}\"}]
     }" \
  "https://api.datadoghq.com/api/v1/series?api_key=${DATADOG_API_KEY}"
}

codestats() {
  r=$(bundle exec rake stats | awk -F\| 'NR>3{if($2!="") print $2,":",$3}' | sed 's| ||g')

  IFS='
  '
  for i in $(echo "${r}"); do
      key=$(echo "${i}" | awk -F: '{print $1}')
      val=$(echo "${i}" | awk -F: '{print $2}')
      echo "key: ${key} => val: ${val}"
      post_metrics_datadog "rails.codestats.${key}" "${val}"
  done
}

dependent_gem_count() {
  r=$(gem dependency | grep '^Gem' | wc -l | sed -e 's/[^0-9]//g')
  echo "$r"
  post_metrics_datadog "rails.dependency.count" $r
}

bench_rails_runner() {
  chmod +x ./bin/rails
  echo "=== Warming disk cache, ... ==="
  time ./bin/rails r '1;'
  echo "=== Benchmark of 'rails r' 3 times ! ==="
  for i in `seq 1 3`
  do
    # time の出力は std error 扱いの為、 標準出力へリダイレクト
    r=`(time -p ./bin/rails r '1;') 2>&1 | grep real | awk '{print $2}'`
    echo "load_time:$r"
    post_metrics_datadog "rails.runner.load_time" "$r"
  done
}

case "$1" in
  codestats ) codestats ;;
  dependent_gem_count ) dependent_gem_count ;;
  bench_rails_runner ) bench_rails_runner ;;
esac