• Ubuntu 18.04
• 通过 strace 查看 Unicorn 中开启的监控线程是否运行正常

1. 查看进程 ID

   $ ps -ef | grep unicorn
   notfound    20178  6419  2 11:22 ?        00:00:17 unicorn master -E production -c config/unicorn.rb -D
   notfound    20192 20178  0 11:22 ?        00:00:00 unicorn worker[0] -E production -c config/unicorn.rb -D
   notfound    20195 20178  0 11:22 ?        00:00:00 unicorn worker[1] -E production -c config/unicorn.rb -D
   notfound    20198 20178  0 11:22 ?        00:00:00 unicorn worker[2] -E production -c config/unicorn.rb -D
   

2. 查看进程和线程

   $ pstree -pt 20178
   bundle(20178)─┬─bundle(20192)─┬─{ruby-timer-thr}(20194)
                 │               └─{ruby_sampler}(20201)
                 ├─bundle(20195)─┬─{ruby-timer-thr}(20197)
                 │               └─{ruby_sampler}(20202)
                 ├─bundle(20198)─┬─{ruby-timer-thr}(20200)
                 │               └─{ruby_sampler}(20203)
                 ├─{ruby-timer-thr}(20199)
                 ├─{server.rb:293}(20212)
                 ├─{unicorn_sampler}(20190)
                 ├─{utils.rb:156}(20213)
                 └─{web_exporter}(20191)
   

3. 查看线程执行内容

   $ strace -p 20201
   

参考

• man strace
• man pstree

Last modified on 2020-05-29