richo · May 12, 2011 23:47 · May 13, 2011 · Oct 9, 2009 · Oct 9, 2009
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -1,9 +1,10 @@
 # unicorn_rails -c /data/github/current/config/unicorn.rb -E production -D
 
+# Set by set_env anyway
 rails_env = ENV['RAILS_ENV'] || 'production'
 
-# 16 workers and 1 master
-worker_processes (rails_env == 'production' ? 16 : 4)
+# 4 workers in testing and 1 master
+worker_processes (rails_env == 'production' ? 4 : 1)
 
 # Load rails+github.git into the master before forking workers
 # for super-fast worker spawn times
@@ -13,16 +14,9 @@
 timeout 30
 
 # Listen on a Unix data socket
-listen '/data/github/current/tmp/sockets/unicorn.sock', :backlog => 2048
-
-
-##
-# REE
-
-# http://www.rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
-if GC.respond_to?(:copy_on_write_friendly=)
-  GC.copy_on_write_friendly = true
-end
+# # XXX Hardcoded socket name??
+# To be generated by Deploy Scripts I guess..
+listen '/tmp/testing_pro.sock', :backlog => 2048
 
 
 before_fork do |server, worker|
@@ -79,7 +73,8 @@
     if RAILS_ENV == 'development'
       STDERR.puts "couldn't change user, oh well"
     else
-      raise e
+      STDERR.puts "Couldn't drop privelidges, proceed anyway."
+      #raise e
     end
   end
-end
+end
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -2,7 +2,7 @@
 
 rails_env = ENV['RAILS_ENV'] || 'production'
 
-# 8 workers and 1 master
+# 16 workers and 1 master
 worker_processes (rails_env == 'production' ? 16 : 4)
 
 # Load rails+github.git into the master before forking workers

diff --git a/gistfile1.rb b/gistfile1.rb
@@ -0,0 +1,85 @@
+# unicorn_rails -c /data/github/current/config/unicorn.rb -E production -D
+
+rails_env = ENV['RAILS_ENV'] || 'production'
+
+# 8 workers and 1 master
+worker_processes (rails_env == 'production' ? 16 : 4)
+
+# Load rails+github.git into the master before forking workers
+# for super-fast worker spawn times
+preload_app true
+
+# Restart any workers that haven't responded in 30 seconds
+timeout 30
+
+# Listen on a Unix data socket
+listen '/data/github/current/tmp/sockets/unicorn.sock', :backlog => 2048
+
+
+##
+# REE
+
+# http://www.rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
+if GC.respond_to?(:copy_on_write_friendly=)
+  GC.copy_on_write_friendly = true
+end
+
+
+before_fork do |server, worker|
+  ##
+  # When sent a USR2, Unicorn will suffix its pidfile with .oldbin and
+  # immediately start loading up a new version of itself (loaded with a new
+  # version of our app). When this new Unicorn is completely loaded
+  # it will begin spawning workers. The first worker spawned will check to
+  # see if an .oldbin pidfile exists. If so, this means we've just booted up
+  # a new Unicorn and need to tell the old one that it can now die. To do so
+  # we send it a QUIT.
+  #
+  # Using this method we get 0 downtime deploys.
+
+  old_pid = RAILS_ROOT + '/tmp/pids/unicorn.pid.oldbin'
+  if File.exists?(old_pid) && server.pid != old_pid
+    begin
+      Process.kill("QUIT", File.read(old_pid).to_i)
+    rescue Errno::ENOENT, Errno::ESRCH
+      # someone else did our job for us
+    end
+  end
+end
+
+
+after_fork do |server, worker|
+  ##
+  # Unicorn master loads the app then forks off workers - because of the way
+  # Unix forking works, we need to make sure we aren't using any of the parent's
+  # sockets, e.g. db connection
+
+  ActiveRecord::Base.establish_connection
+  CHIMNEY.client.connect_to_server
+  # Redis and Memcached would go here but their connections are established
+  # on demand, so the master never opens a socket
+
+
+  ##
+  # Unicorn master is started as root, which is fine, but let's
+  # drop the workers to git:git
+
+  begin
+    uid, gid = Process.euid, Process.egid
+    user, group = 'git', 'git'
+    target_uid = Etc.getpwnam(user).uid
+    target_gid = Etc.getgrnam(group).gid
+    worker.tmp.chown(target_uid, target_gid)
+    if uid != target_uid || gid != target_gid
+      Process.initgroups(user, target_gid)
+      Process::GID.change_privilege(target_gid)
+      Process::UID.change_privilege(target_uid)
+    end
+  rescue => e
+    if RAILS_ENV == 'development'
+      STDERR.puts "couldn't change user, oh well"
+    else
+      raise e
+    end
+  end
+end