Unicorn Config

unicorn.rb

require 'dotenv'

worker_processes Integer(ENV['WEB_CONCURRENCY'] || 3)
timeout 15
preload_app true

stderr_path "/srv/#{application}/shared/log/"ENV['RAILS_ENV']".log"
stdout_path "/srv/#{application}/shared/log/"ENV['RAILS_ENV']".log"
pid "/srv/#{application}/shared/tmp/pids/#{application}.pid"

before_fork do |server, worker|
  f = File.open("#{server.config[:pid]}.lock", 'w')
  exit unless f.flock(File::LOCK_SH)

  Signal.trap 'TERM' do
    puts 'Unicorn master intercepting TERM and sending myself QUIT instead'
    Process.kill 'QUIT', Process.pid
  end
end

after_fork do |server, worker|
  Signal.trap 'TERM' do
    puts 'Unicorn worker intercepting TERM and doing nothing. Wait for master to send QUIT'
  end
end

Ok, how about something like this then? It would be ideal if we could keep this in the app repo (just like sidekiq.yml) because it's easier to make changes if need-be. Consider this a rough-draft...

require 'dotenv'

worker_processes Integer(ENV['UNICORN_CONCURRENCY'] || 3)
timeout Integer(ENV['UNICORN_TIMEOUT'] || 15)
preload_app true

stderr_path ENV['UNICORN_LOG'] if ENV['UNICORN_LOG']
stdout_path ENV['UNICORN_LOG'] if ENV['UNICORN_LOG']
pid ENV['UNICORN_LOG'] if ENV['UNICORN_PID']

before_fork do |server, worker|
  if ENV['UNICORN_PID']
    f = File.open("#{server.config[:pid]}.lock", 'w')
    exit unless f.flock(File::LOCK_SH)
  end

  Signal.trap 'TERM' do
    puts 'Unicorn master intercepting TERM and sending myself QUIT instead'
    Process.kill 'QUIT', Process.pid
  end
end

after_fork do |server, worker|
  Signal.trap 'TERM' do
    puts 'Unicorn worker intercepting TERM and doing nothing. Wait for master to send QUIT'
  end
end

looks awesome. However, can you explain what
stderr_path ENV['UNICORN_LOG'] if ENV['UNICORN_LOG']
stdout_path ENV['UNICORN_LOG'] if ENV['UNICORN_LOG']
pid ENV['UNICORN_LOG'] if ENV['UNICORN_PID']
does? That is confusing to me.