ubuntu supervisor管理uwsgi+nginx

1、概述

superviosr是一個Linux/Unix系統上的進程監控工具，他/她upervisor是一個Python開發的通用的進程管理程序，能夠管理和監控Linux上面的進程，能將一個普通的命令行進程變爲後臺daemon，並監控進程狀態，異常退出時能自動重啓。不過同daemontools同樣，它不能監控daemon進程(也就是後臺進程)

 

2、安裝

apt-get install -y supervisor

 

安裝成功後，會在/etc/supervisor目錄下，生成supervisord.conf配置文件。

你也可使用echo_supervisord_conf > supervisord.conf命令，生成默認的配置文件（不建議，內容比較多）。

supervisord.conf示例配置：

; supervisor config file

[unix_http_server]
file=/var/run/supervisor.sock   ; (the path to the socket file)
chmod=0700                       ; sockef file mode (default 0700)

[supervisord]
logfile=/var/log/supervisor/supervisord.log ; (main log file;default $CWD/supervisord.log)
pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
childlogdir=/var/log/supervisor            ; ('AUTO' child log dir, default $TEMP)

; the below section must remain in the config file for RPC
; (supervisorctl/web interface) to work, additional interfaces may be
; added by defining them in separate rpcinterface: sections
[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface

[supervisorctl]
serverurl=unix:///var/run/supervisor.sock ; use a unix:// URL  for a unix socket

; The [include] section can just contain the "files" setting.  This
; setting can list multiple files (separated by whitespace or
; newlines).  It can also contain wildcards.  The filenames are
; interpreted as relative to this file.  Included files *cannot*
; include files themselves.

[include]
files = /etc/supervisor/conf.d/*.conf

進程配置會讀取/etc/supervisor/conf.d目錄下的*.conf配置文件

 

安裝完成以後，默認就啓動了supervisor

 

3、管理uwsgi

在上一篇文章中，連接以下：

http://www.javashuo.com/article/p-keoiahsf-o.html

 

已經配置好了uwsgi和nginx。這是2個比較關鍵的進程，任意一個進程死掉，都會致使網頁沒法訪問。

 

修改uwsgi配置

關閉後臺運行，爲何呢？由於supervisord沒法管理後臺進程

cd /www/mysite1/uwsgi
vim uwsgi.ini

 

註釋掉daemonize

[uwsgi]

# Django-related settings
# the base directory (full path)
chdir           = /www/mysite1
# Django's wsgi file
module          = mysite1.wsgi
# the virtualenv (full path)
home            = /virtualenvs/venv
# process-related settings
# master
master          = true
# maximum number of worker processes
processes       = 1
# pid file
pidfile         = /www/mysite1/uwsgi/uwsgi.pid
# socket file path (full path)
socket          = /www/mysite1/uwsgi/mysite1.sock
# clear environment on exit
vacuum          = true
#The process runs in the background and types the log to the specified log file
#daemonize       = /www/mysite1/uwsgi/uwsgi.log

 

關閉uwsgi

/virtualenvs/venv/bin/uwsgi --stop uwsgi.pid

 

新增uwsgi 進程配置文件

cd /etc/supervisor/conf.d
vim uwsgi.conf

內容以下：

[program:uwsgi]
directory = /www/mysite1 ;程序的啓動目錄
command= /virtualenvs/venv/bin/uwsgi --ini uwsgi/uwsgi.ini ;啓動命令
autostart = true     ; 在 supervisord 啓動的時候也自動啓動
startsecs = 5        ; 啓動 5 秒後沒有異常退出，就看成已經正常啓動了
autorestart = true   ; 程序異常退出後自動重啓
startretries = 3     ; 啓動失敗自動重試次數，默認是 3
user = root          ; 用哪一個用戶啓動
redirect_stderr = true  ; 把 stderr 重定向到 stdout，默認 false
stdout_logfile_maxbytes = 20MB  ; stdout 日誌文件大小，默認 50MB
stdout_logfile_backups = 20     ; stdout 日誌文件備份數

;stdout 日誌文件，須要注意當指定目錄不存在時沒法正常啓動，因此須要手動建立目錄(supervisord 會自動建立日誌文件)
stdout_logfile = /www/mysite1/logs/stdout.log
;輸出的錯誤文件
stderr_logfile = /www/mysite1/logs/stderr.log
;添加運行須要的環境變量, 這裏用了虛擬環境
;environment=PYTHONPATH=$PYTHONPATH:/virtualenvs/venv/bin/
;而後確保殺死主進程後，子進程也能夠中止
stopasgroup=true
killasgroup=true

 

建立日誌目錄

mkdir /www/mysite1/logs/

注意：supervisord不會自動幫你建立目錄，所以須要手動建立。

 

加載配置

supervisorctl reload

 

若是出現：

error: <class 'socket.error'>, [Errno 2] No such file or directory: file: /usr/lib/python2.7/socket.py line: 228

先要確認進程是否存在：ps -ef | grep supervisord 而後使用命令 supervisord -c /etc/supervisor/supervisord.conf 啓動。

 

查看狀態

 第一個查看，狀態爲STARTING，第二次查看時，狀態爲RUNNING  

root@ubuntu:/etc/supervisor/conf.d# supervisorctl status
uwsgi                            STARTING  
root@ubuntu:/etc/supervisor/conf.d# supervisorctl status
uwsgi                            RUNNING   pid 20367, uptime 0:00:12

 

kill進程

root@ubuntu:/etc/supervisor/conf.d# ps -aux|grep uwsgi
root     20367  0.3  0.8 102680 34832 ?        S    13:50   0:00 /virtualenvs/venv/bin/uwsgi --ini uwsgi/uwsgi.ini
root     20369  0.0  0.7 102680 28768 ?        S    13:50   0:00 /virtualenvs/venv/bin/uwsgi --ini uwsgi/uwsgi.ini
root     20377  0.0  0.0  15984   976 pts/1    S+   13:52   0:00 grep --color=auto uwsgi
root@ubuntu:/etc/supervisor/conf.d# killall -9 uwsgi
root@ubuntu:/etc/supervisor/conf.d# ps -aux|grep uwsgi
root     20379  0.0  0.8 102676 34844 ?        S    13:52   0:00 /virtualenvs/venv/bin/uwsgi --ini uwsgi/uwsgi.ini
root     20381  0.0  0.7 102676 28488 ?        S    13:52   0:00 /virtualenvs/venv/bin/uwsgi --ini uwsgi/uwsgi.ini
root     20383  0.0  0.0  15984   968 pts/1    S+   13:52   0:00 grep --color=auto uwsgi

 

以上信息，能夠發現。強制kill掉進程以後，supervisor會將uwsgi啓動。

 

4、管理Nginx

因爲supervisor不能監控後臺程序，

command = /usr/local/bin/nginx 這個命令默認是後臺啓動，
加上-g ‘daemon off;’這個參數可解決這問題，這個參數的意思是在前臺運行。

command = /usr/local/bin/nginx -g ‘daemon off;’

新增nginx 進程配置文件

cd /etc/supervisor/conf.d
vim nginx.conf

內容以下：

[program:nginx]
command = /usr/sbin/nginx -g 'daemon off;'
startsecs=0
autostart=true
autorestart=true
stdout_logfile=/var/log/nginx/stdout.log
stopasgroup=true
killasgroup=true

 

加載配置

supervisorctl reload

 

查看狀態

root@ubuntu:/etc/supervisor/conf.d# supervisorctl status
nginx                            RUNNING   pid 20409, uptime 0:00:00
uwsgi                            RUNNING   pid 20404, uptime 0:00:07

 

kill掉nginx進程

root@ubuntu:/etc/supervisor/conf.d# ps -aux|grep nginx
root     20441  0.2  0.2 125116  9832 ?        S    13:58   0:00 nginx: master process /usr/sbin/nginx -g daemon off;
www-data 20442  0.0  0.0 125440  3228 ?        S    13:58   0:00 nginx: worker process
root     20446  0.0  0.0  15984  1084 pts/1    S+   13:58   0:00 grep --color=auto nginx
root@ubuntu:/etc/supervisor/conf.d# killall -9 nginx
root@ubuntu:/etc/supervisor/conf.d# ps -aux|grep nginx
root     20448  0.0  0.2 125116  9792 ?        S    13:58   0:00 nginx: master process /usr/sbin/nginx -g daemon off;
www-data 20449  0.0  0.0 125440  3132 ?        S    13:58   0:00 nginx: worker process
root     20451  0.0  0.0  15984   936 pts/1    S+   13:58   0:00 grep --color=auto nginx

 

 

本文參考：

https://www.cnblogs.com/xishuai/p/ubuntu-install-supervisor.html

https://blog.csdn.net/qq_32402917/article/details/80169366

https://blog.csdn.net/genglei1022/article/details/81239900