campfire-streaming-chef-role.rb

name "cf-stream"
description "CF Streaming API"
recipes "rails::apps"

default_attributes :active_groups => {:app => {:enabled => true}},
                   :active_applications => { "campfire" => { "env" => "production" }},
                   :rails => {:web_server => "nginx", :app_server => "thin"},
                   :sysctl => {
                     :settings => {
                       # General gigabit tuning:
                       "net.core.rmem_max" => "16777216",
                       "net.core.wmem_max" => "16777216",
                       "net.ipv4.tcp_rmem" =>  "4096 87380 16777216",
                       "net.ipv4.tcp_wmem" =>  "4096 65536 16777216",
                       "net.ipv4.tcp_syncookies" => 1,
                       # this gives the kernel more memory for tcp
                       # which you need with many (100k+) open socket connections
                       "net.ipv4.tcp_mem" => "50576 64768 98152",
                       "net.core.netdev_max_backlog" => "2500"
                     }
                   }

override_attributes :nginx => {:worker_processes => 12, :worker_connections => 2048}