Python gunicorn 在源更改时自动重新加载
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gunicorn autoreload on source change
提问by Paolo
Finally I migrated my development env from runserver to gunicorn/nginx.
最后，我将我的开发环境从 runserver 迁移到了 gunicorn/nginx。
It'd be convenient to replicate the autoreload feature of runserver to gunicorn, so the server automatically restarts when source changes. Otherwise I have to restart the server manually with kill -HUP.
将 runserver 的 autoreload 功能复制到 gunicorn 会很方便，因此服务器会在源更改时自动重新启动。否则我必须手动重新启动服务器kill -HUP。
Any way to avoid the manual restart?
有什么办法可以避免手动重启？
采纳答案by Dmitry Ziolkovskiy
回答by Dave Forgac
One option would be to use the --max-requeststo limit each spawned process to serving only one request by adding --max-requests 1to the startup options. Every newly spawned process should see your code changes and in a development environment the extra startup time per request should be negligible.
一种选择是使用--max-requests通过添加--max-requests 1到启动选项来限制每个产生的进程只提供一个请求。每个新生成的进程都应该看到您的代码更改，并且在开发环境中，每个请求的额外启动时间应该可以忽略不计。
回答by hobs
Bryan Helmigcame up with this and I modified it to use run_gunicorninstead of launching gunicorndirectly, to make it possible to just cut and paste these 3 commands into a shell in your django project root folder (with your virtualenv activated):
Bryan Helmig想出了这个，我修改了它以使用run_gunicorn而不是gunicorn直接启动，以便可以将这 3 个命令剪切并粘贴到 django 项目根文件夹中的 shell 中（激活 virtualenv）：
pip install watchdog -U
watchmedo shell-command --patterns="*.py;*.html;*.css;*.js" --recursive --command='echo "${watch_src_path}" && kill -HUP `cat gunicorn.pid`' . &
python manage.py run_gunicorn 127.0.0.1:80 --pid=gunicorn.pid
回答by user3628119
I use git push to deploy to production and set up git hooks to run a script. The advantage of this approach is you can also do your migration and package installation at the same time. https://mikeeverhart.net/2013/01/using-git-to-deploy-code/
我使用 git push 部署到生产环境并设置 git hooks 来运行脚本。这种方法的优点是您还可以同时进行迁移和软件包安装。 https://mikeeverhart.net/2013/01/using-git-to-deploy-code/
mkdir -p /home/git/project_name.git
cd /home/git/project_name.git
git init --bare
Then create a script /home/git/project_name.git/hooks/post-receive.
然后创建一个脚本/home/git/project_name.git/hooks/post-receive。
#!/bin/bash
GIT_WORK_TREE=/path/to/project git checkout -f
source /path/to/virtualenv/activate
pip install -r /path/to/project/requirements.txt
python /path/to/project/manage.py migrate
sudo supervisorctl restart project_name
Make sure to chmod u+x post-receive, and add user to sudoers. Allow it to run sudo supervisorctlwithout password. https://www.cyberciti.biz/faq/linux-unix-running-sudo-command-without-a-password/
确保chmod u+x post-receive将用户添加到 sudoers。允许它在sudo supervisorctl没有密码的情况下运行。 https://www.cyberciti.biz/faq/linux-unix-running-sudo-command-without-a-password/
From my local / development server, I set up git remotethat allows me to push to the production server
从我的本地/开发服务器，我设置git remote允许我推送到生产服务器
git remote add production ssh://user_name@production-server/home/git/project_name.git
# initial push
git push production +master:refs/heads/master
# subsequent push
git push production master
As a bonus, you will get to see all the prompts as the script is running. So you will see if there is any issue with the migration/package installation/supervisor restart.
作为奖励，您将在脚本运行时看到所有提示。所以你会看到迁移/包安装/主管重启是否有任何问题。
