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# Our own variable where we deploy this app to
deploy_to = "/srv/example.com"
current_path = "#{deploy_to}/current"
shared_path = "#{deploy_to}/shared"
shared_bundler_gems_path = "#{shared_path}/bundler_gems"
# See http://unicorn.bogomips.org/Sandbox.html
# Helps ensure the correct unicorn_rails is used when upgrading with USR2
Unicorn::HttpServer::START_CTX[0] = "#{shared_bundler_gems_path}/bin/unicorn_rails"
# Use at least one worker per core if you're on a dedicated server,
# more will usually help for _short_ waits on databases/caches.
worker_processes 2
# Help ensure your application will always spawn in the symlinked
# "current" directory that Capistrano sets up.
working_directory current_path
# listen on both a Unix domain socket and a TCP port,
# we use a shorter backlog for quicker failover when busy
listen "/tmp/.staging_unicorn_sock", :backlog => 64
#listen 8080, :tcp_nopush => true
# nuke workers after 30 seconds instead of 60 seconds (the default)
timeout 30
# feel free to point this anywhere accessible on the filesystem
# pid "/var/run/staging_unicorn.pid"
pid "#{shared_path}/pids/unicorn.pid"
# By default, the Unicorn logger will write to stderr.
# Additionally, some applications/frameworks log to stderr or stdout,
# so prevent them from going to /dev/null when daemonized here:
stderr_path "#{shared_path}/log/unicorn.stderr.log"
stdout_path "#{shared_path}/log/unicorn.stdout.log"
# combine REE with "preload_app true" for memory savings
# http://rubyenterpriseedition.com/faq.html#adapt_apps_for_cow
preload_app true
GC.respond_to?(:copy_on_write_friendly=) and
GC.copy_on_write_friendly = true
before_fork do |server, worker|
# the following is highly recomended for Rails + "preload_app true"
# as there's no need for the master process to hold a connection
defined?(ActiveRecord::Base) and
ActiveRecord::Base.connection.disconnect!
# The following is only recommended for memory/DB-constrained
# installations. It is not needed if your system can house
# twice as many worker_processes as you have configured.
#
# # This allows a new master process to incrementally
# # phase out the old master process with SIGTTOU to avoid a
# # thundering herd (especially in the "preload_app false" case)
# # when doing a transparent upgrade. The last worker spawned
# # will then kill off the old master process with a SIGQUIT.
old_pid = "#{server.config[:pid]}.oldbin"
if old_pid != server.pid
begin
sig = (worker.nr + 1) >= server.worker_processes ? :QUIT : :TTOU
Process.kill(sig, File.read(old_pid).to_i)
rescue Errno::ENOENT, Errno::ESRCH
end
end
# # *optionally* throttle the master from forking too quickly by sleeping
# sleep 1
log_env(:before_fork, server)
end
after_fork do |server, worker|
# worker.user('deployer', 'deployer') if Process.euid == 0
# per-process listener ports for debugging/admin/migrations
# addr = "127.0.0.1:#{9293 + worker.nr}"
# server.listen(addr, :tries => -1, :delay => 5, :tcp_nopush => true)
# the following is *required* for Rails + "preload_app true",
defined?(ActiveRecord::Base) and
ActiveRecord::Base.establish_connection
# if preload_app is true, then you may also want to check and
# restart any other shared sockets/descriptors such as Memcached,
# and Redis. TokyoCabinet file handles are safe to reuse
# between any number of forked children (assuming your kernel
# correctly implements pread()/pwrite() system calls)
# Reconnect memcached
Rails.cache.reset
end
before_exec do |server|
paths = (ENV["PATH"] || "").split(File::PATH_SEPARATOR)
paths.unshift "#{shared_bundler_gems_path}/bin"
ENV["PATH"] = paths.uniq.join(File::PATH_SEPARATOR)
ENV['GEM_HOME'] = ENV['GEM_PATH'] = shared_bundler_gems_path
ENV['BUNDLE_GEMFILE'] = "#{current_path}/Gemfile"
end
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