Class: UnicornRelay::Teardown

Inherits:

Object

• Object
• UnicornRelay::Teardown

Defined in:

lib/unicorn_relay/teardown.rb

Overview

Before forking anew, kill the unicorn master process that belongs to the .oldbin PID. This enables 0 downtime deploys.

Instance Method Summary

• #initialize(server:, pid_file:) ⇒ Teardown constructor

  A new instance of Teardown.

• #perform ⇒ Object

  Peforms the teardown of the old unicorn master from one of the workers forked by the new master, if the new master has a different pid file.

Constructor Details

#initialize(server:, pid_file:) ⇒ Teardown

Returns a new instance of Teardown.

Parameters:

• server (Unicorn::HttpServer) —

  an instance of a unicorn server

• pid_file (String) —

  the path to the old unicorn master’s pid file (usually ending in “.oldbin”)

# File 'lib/unicorn_relay/teardown.rb', line 6

def initialize(server:, pid_file:)
  @server   = server
  @pid_file = pid_file
end

Instance Method Details

#perform ⇒ Object

Peforms the teardown of the old unicorn master from one of the workers forked by the new master, if the new master has a different pid file.

# File 'lib/unicorn_relay/teardown.rb', line 13

def perform
  server_has_new_pid_file? && pid and kill_pid
end