File.read（）在我的Capistrano任务中失败（文件*确实存在）

Question

我的Capistrano任务失败

No such file or directory @ rb_sysopen - /home/blog/pids/grantb.blog.staging.pid`

以下是我的命令提示符：

证明该文件确实存在的证据

[blog@grantb current]$ ls /home/blog/pids/grantb.blog.staging.pid
/home/blog/pids/grantb.blog.staging.pid

[blog@grantb current]$ irb
2.1.0 :001 > File.read("/home/blog/pids/grantb.blog.staging.pid").to_i
 => 936

这是部分任务：

desc 'Restart application'
task :restart do
  on roles(:app), in: :sequence, wait: 5 do
    pid_file = fetch(:pid_file)

    puts "PID_FILE name: #{pid_file}"
      # outputs 'PID_FILE name: /home/blog/pids/grantb.blog.staging.pid'
    execute "/bin/ls #{pid_file}"  
      # outputs '/home/blog/pids/grantb.blog.staging.pid'
    execute "/bin/ls #{pid_file}"  
      # outputs '936'

    pid = File.read(pid_file).to_i
    # Exception while executing on host x.x.x.x: No such file or directory @ rb_sysopen - /home/blog/pids/grantb.blog.staging.pid
    # WHAT THE HELL!

谁能告诉我哪里出错？

Answer 1

想出来。

File.read()正在我的本地计算机上执行，而不是在远程计算机上执行。啊。

我需要做的是这样的事情：

within release_path do
  execute "cat #{pid_file}"
end

我的实际任务是：

desc 'Restart application'
task :restart do
  on roles(:app), in: :sequence, wait: 5 do
    pid_file = fetch(:pid_file)

    within release_path do
      execute "((ls #{pid_file} && ps -p `cat #{pid_file}`) && kill -9 `cat #{pid_file}`) || true"
      execute "(ls #{pid_file} && /bin/rm #{pid_file}) || true"

      # RESTART COMMAND GOES HERE
    end
  end
end