如何優雅的退出/關閉/重啓gunicorn進程

閱讀目錄(Content)

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

在工做中，會發現gunicorn啓動的web服務，不管怎麼使用kill -9 進程號都是沒法殺死gunicorn，通過我一番百度和谷歌，發現想要刪除gunicorn進程其實很簡單。

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1. 尋找masterpid

經過執行以下命令，能夠獲取Gunicorn進程樹：
pstree -ap|grep gunicorn

獲得以下的結果。

|-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，30080就是Gunicorn的主進程。

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2. 重啓Gunicorn任務

按照官方的推薦方法，很容易執行命令：

kill -HUP 30080

執行上述命令後，再次執行「pstree -ap|grep gunicorn」，咱們很容易發現，除了主進程，其餘的Gunicorn進程都已經銷燬，並新建了進程（進程ID發生了變化）。

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3. 退出Gunicorn任務

kill -9 30080