Simple recipe to install StatsD and set it up with Librato Metrics backend.

cookbooks/main/recipes/default.rb

@@ -138,3 +138,6 @@
   # postgresql9_pg_buffercache "postgres"
   # postgresql9_pg_freespacemap "postgres"
 #end
+
+# uncomment to include the StatsD-Librato recipe
+# require_recipe "statsd-librato"

cookbooks/statsd-librato/README.md

@@ -0,0 +1,27 @@
+# StatsD with Librato Metrics backend
+
+## Overview
+
+This is a simple chef recipe that installs [StatsD](https://github.com/etsy/statsd) with [Librato Metrics](https://metrics.librato.com) backend.
+
+## Requirements
+
+* An active [Librato Metrics](https://metrics.librato.com/sign_up) account.
+
+## Configuration
+
+* Set your [Librato Metrics](https://metrics.librato.com) credentials in ```cookbooks/recipes/defatult.rb```.
+
+```ruby
+librato_email = "you@example.com"
+librato_token = "your-token-goes-here"
+```
+
+## Enabling
+
+* Enable the recipe in ```cookbooks/main/recipes/default.rb```.
+
+```ruby
+# uncomment to include the StatsD-Librato recipe
+require_recipe "statsd-librato"
+```

cookbooks/statsd-librato/recipes/default.rb

@@ -0,0 +1,73 @@
+#
+# Cookbook Name:: statsd-librato
+# Recipe:: default
+#
+
+# Set your Librato credentials
+librato_email = "you@example.com"
+librato_token = "your-token-goes-here"
+
+# Set your app name
+app_name = "your-app-name-goes-here"
+
+# Set install dir for statsd
+src_dir = "/usr/lib/statsd"
+
+statsd_port = 8126
+
+statsd_enabled_env = ['production'].include?(node[:environment][:framework_env])
+statsd_enabled_instance = ['app_master', 'app'].include?(node[:instance_role])
+
+if statsd_enabled_env && statsd_enabled_instance
+  execute "install statsd" do
+    command "git clone git://github.com/etsy/statsd.git"
+    cwd "/usr/lib"
+    not_if { File.exists?("#{src_dir}/.git/")}
+    user "root"
+  end
+
+  execute "install statsd-librato-backend" do
+    command "npm install statsd-librato-backend"
+    cwd "/usr/lib/statsd"
+    not_if { File.exists?("#{src_dir}/node_modules/statsd-librato-backend/package.json")}
+    user "root"
+  end
+
+  template "/data/#{app_name}/shared/config/statsd.js" do
+    owner node[:owner_name]
+    group node[:owner_name]
+    mode 0644
+    source "config.js.erb"
+    variables({
+      :statsd_port => port,
+      :librato_email => librato_email,
+      :librato_token => librato_token
+    })
+  end
+
+  template "/data/#{app_name}/shared/statsd" do
+    owner node[:owner_name]
+    group node[:owner_name]
+    mode 0744
+    source "statsd.erb"
+    variables({
+      :src_dir => src_dir,
+      :app_name => app_name
+    })
+  end
+
+  template "/etc/monit.d/statsd.monitrc" do
+    owner node[:owner_name]
+    group node[:owner_name]
+    mode 0644
+    source "monitrc.conf.erb"
+    variables({
+      :user => node[:owner_name],
+      :app_name => app_name
+    })
+  end
+
+  execute "monit reload" do
+    action :run
+  end
+end

cookbooks/statsd-librato/templates/default/config.js.erb

@@ -0,0 +1,8 @@
+{
+  port: <%= @statsd_port %>,
+  backends: [ "statsd-librato-backend" ],
+  librato: {
+    email: "<%= @librato_email %>",
+    token: "<%= @librato_token %>"
+  }
+}

cookbooks/statsd-librato/templates/default/monitrc.conf.erb

@@ -0,0 +1,5 @@
+check process statsd
+  with pidfile /data/<%= @app_name %>/shared/pids/statsd.pid
+  start = "/data/<%= @app_name %>/shared/statsd start" as uid <%= @user %> and gid <%= @user %>
+  stop = "/data/<%= @app_name %>/shared/statsd stop" as uid <%= @user %> and gid <%= @user %>
+  group statsd

cookbooks/statsd-librato/templates/default/statsd.erb

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+case $1 in
+  start)
+    echo $$ > /data/<%= @app_name %>/shared/pids/statsd.pid;
+    exec 2>&1 node <%= @src_dir %>/stats.js /data/<%= @app_name %>/shared/config/statsd.js
+    ;;
+  stop)
+    kill `cat /data/<%= @app_name %>/shared/pids/statsd.pid` ;;
+  *)
+  echo "usage: statsd {start|stop}" ;;
+
+esac
+exit 0