如何優(yōu)雅的退出/關(guān)閉/重啟gunicorn進程

閱讀目錄(Content)

• 1. 尋找masterpid
• 2. 重啟Gunicorn任務
• 3. 退出Gunicorn任務

在工作中堪遂，會發(fā)現(xiàn)gunicorn啟動的web服務看蚜，無論怎么使用kill -9 進程號都是無法殺死gunicorn，經(jīng)過我一番百度和谷歌栗弟，發(fā)現(xiàn)想要刪除gunicorn進程其實很簡單吐葵。

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1. 尋找masterpid

通過執(zhí)行如下命令规揪，可以獲取Gunicorn進程樹：
pstree -ap|grep gunicorn

得到如下的結(jié)果。

|-grep,6194 --col gunicorn
  |   `-gunicorn,30080 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,4413 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,8030 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,8135 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,8137 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,11532 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,13460 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,19728 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,23585 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,23825 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,27921 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,28899 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,28900 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,28901 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,35637 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,36963 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,43074 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,43118 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,43232 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,43307 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,43308 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,44018 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,46996 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       |-gunicorn,47000 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py
  |       `-gunicorn,47650 /usr/local/bin/gunicorn collect:app -c collect_gunicorn.py

很顯然温峭，30080就是Gunicorn的主進程猛铅。

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2. 重啟Gunicorn任務

按照官方的推薦方法，很容易執(zhí)行命令：

kill -HUP 30080

執(zhí)行上述命令后凤藏，再次執(zhí)行“pstree -ap|grep gunicorn”奸忽，我們很容易發(fā)現(xiàn)，除了主進程揖庄，其他的Gunicorn進程都已經(jīng)銷毀栗菜，并新建了進程（進程ID發(fā)生了變化）。

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3. 退出Gunicorn任務

kill -9 30080