mikhailov

namespace :log do

  desc "A pinch of tail"
  task :tailf, :roles => :app do
    run "tail -n 10000 -f #{shared_path}/log/#{rails_env}.log" do |channel, stream, data|
      puts "#{data}"
      break if stream == :err
    end
  end

mikhailov

class ActiveRecord::ConnectionAdapters::Mysql2Adapter

private
  alias_method :configure_connection_without_strict_mode, :configure_connection

  def configure_connection
    configure_connection_without_strict_mode
    strict_mode = "SQL_MODE='STRICT_ALL_TABLES'"
    execute("SET #{strict_mode}", :skip_logging)
  end

mikhailov

# Nginx+Unicorn best-practices congifuration guide. Heartbleed fixed.
# We use latest stable nginx with fresh **openssl**, **zlib** and **pcre** dependencies.
# Some extra handy modules to use: --with-http_stub_status_module --with-http_gzip_static_module
#
# Deployment structure
#
# SERVER:
#  /etc/init.d/nginx                             (1. nginx)
#  /home/app/public_html/app_production/current  (Capistrano directory)
#

mikhailov

# Nginx can serve FLV/MP4 files by pseudo-streaming way without any specific media-server software. 
# To do the custom build we use 2 modules: --with-http_secure_link_module --with-http_flv_module
# This module "secure-link" helps you to protect links from stealing away.
#
# NOTE: see more details at coderwall: http://coderwall.com/p/3hksyg

cd /usr/src
wget http://nginx.org/download/nginx-1.5.13.tar.gz
tar xzvf ./nginx-1.5.13.tar.gz && rm -f ./nginx-1.5.13.tar.gz

mikhailov

# standard capistrano config goes here....
# Put the maintenance screen if DB migrations take in place only

before "deploy",                 "deploy:delayed_job:stop"
before "deploy:migrations",      "deploy:delayed_job:stop"

after  "deploy:update_code",     "deploy:symlink_shared", "deploy:assets_compress"
before "deploy:migrate",         "deploy:web:disable",    "deploy:db:backup"

after  "deploy",                 "newrelic:notice_deployment", "deploy:cleanup", "deploy:delayed_job:restart"

mikhailov

#!/bin/sh

ip route |grep default # default via 10.235.9.1 dev eth0
ip route change default via `ip route| awk '/^def/{print $3}'` dev eth0 initcwnd 16
ip route |grep default # default via 10.235.9.1 dev eth0 initcwnd 16

sysctl -w net.ipv4.tcp_slow_start_after_idle=0
sysctl -a |grep net.ipv4.tcp_slow_start_after_idle

mikhailov

# This the bash script to handle up-and-runnig VM created through Vagrant
#!/usr/bin/env bash


# PRIVATE: error level message
error_message () {
  echo "$(tput setaf 1)ERROR: $1$(tput sgr0)"
}

mikhailov

net.inet.tcp.sack=1
net.inet.tcp.rfc1323=1
net.inet.tcp.recvspace=1048576
net.inet.udp.recvspace=1048576
net.inet.tcp.sendspace=1048576
net.inet.tcp.mssdflt=1460
net.inet.tcp.win_scale_factor=8

mikhailov

echo 'events {
    worker_connections            1024;
}

error_log                         /usr/local/Cellar/nginx/1.5.8/error.log;

http {
  include                         mime.types;
  default_type                    application/octet-stream;
  sendfile                        on;

mikhailov

events {
  worker_connections  1024;
}

http {
  default_type       text/html;
  access_log         /dev/stdout;
  sendfile           on;
  keepalive_timeout  65;