Setting up syslog logging on Heroku with Sinatra 1.2.x

README.md

Setting up syslog logging on Heroku with Sinatra 1.2.x

1. Update your Gemfile to include:

gem 'remote_syslog_logger'

2. Add the file remote_syslog.rb below to your Sinatra app as lib/remote_syslog.rb.

3. Modify your config.ru to match the example one below.

4. Setup REMOTE_SYSLOG_URI environment variable

$ heroku config:add REMOTE_SYSLOG_URI=syslog://host.name.com:port

If you don't have a syslog target, get one for free from Papertrail.

That's it

On your next deploy you will be logging to that syslog host. Logs will use the hostname format: {APP_NAME}-{DYNO_NAME}.

config.ru

require "rubygems"
require "bundler"

Bundler.require

if ENV['REMOTE_SYSLOG_URI']
  require 'lib/remote_syslog'

  logger = RemoteSyslog.new(ENV['REMOTE_SYSLOG_URI'])
  use Rack::CommonLogger, logger
end

require "hello-world"
run HelloWorld::Application

remote_syslog.rb

require 'uri'

class RemoteSyslog
  def initialize(uri)
    uri = URI.parse(uri)
    @logger = RemoteSyslogLogger.
      new(uri.host, uri.port,
          :local_hostname => "#{ENV['APP_NAME']}-#{ENV['PS']}")
  end

  def write(str)
    @logger.info(str)
  end
end