带符号链接的独角兽working_directory

我们无法使用独角兽进行热部署。我们几乎使用规范unicorn.rb配置，将working_directory设置为指向符号链接的文件夹，但不知怎的，它在第一次启动时似乎停留在实际文件夹中，并且无法遵循符号链接。带符号链接的独角兽working_directory

# config/unicorn.rb 
if ENV['RAILS_ENV'] == 'production' 
    worker_processes 4 
else 
    worker_processes 2 
end 

working_directory "/var/local/project/symlinkfolder" 

# Listen on unix socket 
listen "/tmp/unicorn.sock", :backlog => 64 

pid "/var/run/unicorn/unicorn.pid" 

stderr_path "/var/log/unicorn/unicorn.log" 
stdout_path "/var/log/unicorn/unicorn.log" 

preload_app 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 
    if defined?(ActiveRecord::Base) 
    ActiveRecord::Base.connection.disconnect! 
    end 

    # Before forking, kill the master process that belongs to the .oldbin PID. 
    # This enables 0 downtime deploys. 
    old_pid = "/var/run/unicorn/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| 
    # the following is *required* for Rails + "preload_app true", 
    if defined?(ActiveRecord::Base) 
    ActiveRecord::Base.establish_connection 
    end 

    # this makes sure the logging-rails framework works when preload_app = true 
    Logging.reopen 
    # 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) 
end

当我们发起USR2，我们看到这麒麟日志：6版本

executing ["/var/local/project/project.d/6/vendor/bundle/ruby/1.9.1/bin/unicorn_rails", "-E", "staging", "-D", "-c", "/var/local/project/symlinkfolder/config/unicorn.rb"│· 
, {12=>#<Kgio::UNIXServer:fd 12>}] (in /var/local/project/project.d/8)

所以麒麟是某种“卡住”，而实际的符号链接文件夹是在8版本.. 。这个问题一旦我们删除文件夹的版本6后几个部署...

working_directory设置为symlink'd fol明镜
的符号链接指向的/var/local/project/project.d/[id]文件夹正确
我们之前发送USR2信号

什么，我们错过更新符号链接？

来源

2013-02-21 gingerlime

的解决方案是明确设置麒麟二进制路径，作为http://unicorn.bogomips.org/Sandbox.html

app_root = "/var/local/project/symlinkfolder" 
working_directory app_root 
# see http://unicorn.bogomips.org/Sandbox.html 
Unicorn::HttpServer::START_CTX[0] = "#{app_root}/vendor/bundle/ruby/1.9.1/bin/unicorn_rails"

解释（在有些混乱的方式），然后，我们需要发出unicorn reload（kill -HUP）命令，因此麒麟重新加载配置文件。从此，发出USR2信号正常工作。

来源

2013-02-25 16:10:46 gingerlime

带符号链接的独角兽working_directory

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