Celery 4.3.0 使用supervisor 配置后台运行

参考文献

thomassileo.name/blog/2012/0…

前言

Supervisor是一个使你的进程能够在unix进程后台运行的python库。

本篇章的相关软件版本以下：

• Celery 4.3.0
• supervisor 4.0.4

安装

pip3 install supervisor
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安装完毕后，查看版本以下：

[root@server01 ~]# pip3 list | grep su
supervisor              4.0.4   
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这时候使用pip的安装方式其实并无设置好supervisor的环境变量，还须要查看一下supervisor安装后的二进制可执行文件在哪里。

• 搜索在 / 目录下，先后模糊查询名称为 supervi 的文件，以下：

[root@server01 performance]# find / -name "*supervi*" -ls | grep python3 | grep bin
405327    4 -rwxr-xr-x   1 root     root          242 Oct 12 18:42 /usr/local/python3/bin/supervisorctl
405325    4 -rwxr-xr-x   1 root     root          237 Oct 12 18:42 /usr/local/python3/bin/echo_supervisord_conf
405328    4 -rwxr-xr-x   1 root     root          240 Oct 12 18:42 /usr/local/python3/bin/supervisord

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• 将 supervisorctl、echo_supervisord_conf 和 supervisord 添加软链到执行目录下/usr/bin

ln -s /usr/local/python3/bin/echo_supervisord_conf /usr/bin/echo_supervisord_conf
ln -s /usr/local/python3/bin/supervisord /usr/bin/supervisord
ln -s /usr/local/python3/bin/supervisorctl /usr/bin/supervisorctl
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此时算是安装好了。

进入django项目目录，建立配置文件

cd /path/to/your/project # django项目目录
echo_supervisord_conf > supervisord.conf # 建立配置文件
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执行以下：

# 进入django项目目录
[root@server01 ~]# cd /work/performance/ 
[root@server01 performance]# ls
apps  celery_tasks  db  docs  manage.py  performance  README.en.md  README.md  requirements.txt  start_celery.sh  static  templates  utils
[root@server01 performance]# 
# 建立配置文件
[root@server01 performance]# echo_supervisord_conf > supervisord.conf
[root@server01 performance]# 
[root@server01 performance]# cat supervisord.conf 
; Sample supervisor config file.
;
; For more information on the config file, please see:
; http://supervisord.org/configuration.html
;
; Notes:
;  - Shell expansion ("~" or "$HOME") is not supported.  Environment
;    variables can be expanded using this syntax: "%(ENV_HOME)s".
;  - Quotes around values are not supported, except in the case of
;    the environment= options as shown below.
...
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下一步追加Celery配置到supervisord.conf文件中

示例配置以下：

[program:celeryd]
command=/home/thomas/virtualenvs/yourvenv/bin/celery worker --app=myapp -l info 
stdout_logfile=/path/to/your/logs/celeryd.log
stderr_logfile=/path/to/your/logs/celeryd.log
autostart=true
autorestart=true
startsecs=10
stopwaitsecs=600
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command : 你要执行的 celery 命令， autostart ：自启动

个人配置以下：

[program:celeryd]
command=/usr/bin/celery -A celery_tasks worker -l info                         
stdout_logfile=/work/performance/logs/celeryd.log
stderr_logfile=/work/performance/logs/celeryd.log
autostart=true
autorestart=true
startsecs=10
stopwaitsecs=600
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启动示例

只须要在django项目的路径下，执行supervisord便可。

$ supervisord
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执行以下：

[root@server01 performance]# supervisord
/usr/local/python3/lib/python3.7/site-packages/supervisor/options.py:471: UserWarning: Supervisord is running as root and it is searching for its configuration file in default locations (including its current working directory); you probably want to specify a "-c" argument specifying an absolute path to a configuration file for improved security.
  'Supervisord is running as root and it is searching '
[root@server01 performance]# 
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这里默认启动会提示直接根据当前路径查找配置文件supervisord.conf，固然也能够使用-c参数指定配置文件。

supervisorctl 命令

在启动后台执行以后，能够使用supervisorctl命令查看后台的日志信息，以及重启服务。

$ supervisorctl tail celeryd # 查看最后的日志
$ supervisorctl tail -f celeryd # 持续
$ supervisorctl restart celeryd
$ supervisorctl status celeryd
$ supervisorctl start celeryd
$ supervisorctl stop celeryd
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执行以下：

• 执行supervisorctl tail celeryd 能够看到打印一下日志就结束了，无法持续观察日志

[root@server01 performance]# supervisorctl tail celeryd
/usr/local/python3/lib/python3.7/site-packages/celery/platforms.py:801: RuntimeWarning: You're running the worker with superuser privileges: this is absolutely not recommended! Please specify a different user using the --uid option. User information: uid=0 euid=0 gid=0 egid=0 uid=uid, euid=euid, gid=gid, egid=egid, [2019-10-13 22:30:20,858: INFO/MainProcess] Connected to redis://127.0.0.1:6379/8 [2019-10-13 22:30:20,871: INFO/MainProcess] mingle: searching for neighbors [2019-10-13 22:30:21,893: INFO/MainProcess] mingle: all alone [2019-10-13 22:30:21,906: WARNING/MainProcess] /usr/local/python3/lib/python3.7/site-packages/celery/fixups/django.py:202: UserWarning: Using settings.DEBUG leads to a memory leak, never use this setting in production environments! warnings.warn('Using settings.DEBUG leads to a memory leak, never ' [2019-10-13 22:30:21,907: INFO/MainProcess] celery@server01 ready. [root@server01 performance]# 复制代码

• 增长 -f 参数，持续查看日志信息

[root@server01 performance]# supervisorctl tail -f celeryd
==> Press Ctrl-C to exit <==
.tasks.send_pressure_report_mail
  . celery_tasks.tasks.stop_apiservers_nmon
  . celery_tasks.tasks.stop_locust

/usr/local/python3/lib/python3.7/site-packages/celery/platforms.py:801: RuntimeWarning: You're running the worker with superuser privileges: this is absolutely not recommended! Please specify a different user using the --uid option. User information: uid=0 euid=0 gid=0 egid=0 uid=uid, euid=euid, gid=gid, egid=egid, [2019-10-13 22:38:10,078: INFO/MainProcess] Connected to redis://127.0.0.1:6379/8 [2019-10-13 22:38:10,089: INFO/MainProcess] mingle: searching for neighbors [2019-10-13 22:38:11,111: INFO/MainProcess] mingle: all alone [2019-10-13 22:38:11,126: WARNING/MainProcess] /usr/local/python3/lib/python3.7/site-packages/celery/fixups/django.py:202: UserWarning: Using settings.DEBUG leads to a memory leak, never use this setting in production environments! warnings.warn('Using settings.DEBUG leads to a memory leak, never ' [2019-10-13 22:38:11,126: INFO/MainProcess] celery@server01 ready. 复制代码

• 重启服务

[root@server01 performance]# supervisorctl restart celeryd
celeryd: stopped
celeryd: started
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• 查看运行状态

[root@server01 performance]# supervisorctl status celeryd
celeryd                          RUNNING   pid 3533, uptime 0:10:05
[root@server01 performance]# 
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