Supervisor进程管理工具使用教程与讲解

夜雨闻铃

1.Supervisor工具作用?

Supervisor 是用Python开发的一套通用的进程管理程序,能将一个普通的命令行进程变为后台daemon,并监控进程状态,异常退出时能自动重启。

看之前先明确Supervisor有啥用,究竟能帮到我们什么呢?
1.可以将一些脚本设置为以守护进程的方式一直在后台运行。
2.监控进程的运行情况,面对突发情况能及时预警或者重启,防止出现进程挂掉,影响业务的正常运行

2.安装

安装方式:
1.pip 安装(需安装有pip)
pip install supervisor

2.yum安装 配置好yum源。
yum install -y supervisor

安装supervisor
提示找不到supervisor时,需要yum install epel-release先安装EPEL源)

安装好使用supervisord -v查看版本。
此处使用yum安装的3.4版本
image.png

3.使用

执行
echo_supervisord_conf > /etc/supervisord.conf
创建一个官方默认的配置文件(supervisord.conf 主配置文件)到etc目录下。

可以自己根据喜好修改配置文件的设置。
我自己修改了一些配置文件路径,日志路径等。可供大家参考

;Sample supervisor config file.
[unix_http_server]
file=/var/supervisor/run/supervisor.sock   ; (the path to the socket file)
;chmod=0700                 ; sockef file mode (default 0700)
;chown=nobody:nogroup       ; socket file uid:gid owner
;username=user              ; (default is no username (open server))
;password=123               ; (default is no password (open server))

;[inet_http_server]         ; inet (TCP) server disabled by default
;port=127.0.0.1:9001        ; (ip_address:port specifier, *:port for all iface)
;username=user              ; (default is no username (open server))
;password=123               ; (default is no password (open server))

[supervisord]
logfile=/var/supervisor/log/supervisord.log  ; (main log file;default $CWD/supervisord.log)
logfile_maxbytes=50MB       ; (max main logfile bytes b4 rotation;default 50MB)
logfile_backups=10          ; (num of main logfile rotation backups;default 10)
loglevel=info               ; (log level;default info; others: debug,warn,trace)
pidfile=/var/supervisor/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
nodaemon=false              ; (start in foreground if true;default false)
minfds=1024                 ; (min. avail startup file descriptors;default 1024)
minprocs=200                ; (min. avail process descriptors;default 200)
;umask=022                  ; (process file creation umask;default 022)
;user=chrism                 ; (default is current user, required if root)
;identifier=supervisor       ; (supervisord identifier, default is 'supervisor')
;directory=/tmp              ; (default is not to cd during start)
;nocleanup=true              ; (don't clean up tempfiles at start;default false)
;childlogdir=/tmp            ; ('AUTO' child log dir, default $TEMP)
;environment=KEY=value       ; (key value pairs to add to environment)
;strip_ansi=false            ; (strip ansi escape codes in logs; def. false)

; 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/supervisor/run/supervisor.sock ; use a unix:// URL  for a unix socket
;serverurl=http://127.0.0.1:9001 ; use an http:// url to specify an inet socket
;username=chris              ; should be same as http_username if set
;password=123                ; should be same as http_password if set
;prompt=mysupervisor         ; cmd line prompt (default "supervisor")
;history_file=~/.sc_history  ; use readline history if available

; The below sample program section shows all possible program subsection values,
; create one or more 'real' program: sections to be able to control them under
; supervisor.

;[program:theprogramname]
;command=/bin/cat              ; the program (relative uses PATH, can take args)
;process_name=%(program_name)s ; process_name expr (default %(program_name)s)
;numprocs=1                    ; number of processes copies to start (def 1)
;directory=/tmp                ; directory to cwd to before exec (def no cwd)
;umask=022                     ; umask for process (default None)
;priority=999                  ; the relative start priority (default 999)
;autostart=true                ; start at supervisord start (default: true)
;autorestart=true              ; retstart at unexpected quit (default: true)
;startsecs=10                  ; number of secs prog must stay running (def. 1)
;startretries=3                ; max # of serial start failures (default 3)
;exitcodes=0,2                 ; 'expected' exit codes for process (default 0,2)
;stopsignal=QUIT               ; signal used to kill process (default TERM)
;stopwaitsecs=10               ; max num secs to wait b4 SIGKILL (default 10)
;user=chrism                   ; setuid to this UNIX account to run the program
;redirect_stderr=true          ; redirect proc stderr to stdout (default false)
;stdout_logfile=/a/path        ; stdout log path, NONE for none; default AUTO
;stdout_logfile_maxbytes=1MB   ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups=10     ; # of stdout logfile backups (default 10)
;stdout_capture_maxbytes=1MB   ; number of bytes in 'capturemode' (default 0)
;stdout_events_enabled=false   ; emit events on stdout writes (default false)
;stderr_logfile=/a/path        ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes=1MB   ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups=10     ; # of stderr logfile backups (default 10)
;stderr_capture_maxbytes=1MB   ; number of bytes in 'capturemode' (default 0)
;stderr_events_enabled=false   ; emit events on stderr writes (default false)
;environment=A=1,B=2           ; process environment additions (def no adds)
;serverurl=AUTO                ; override serverurl computation (childutils)

; The below sample eventlistener section shows all possible
; eventlistener subsection values, create one or more 'real'
; eventlistener: sections to be able to handle event notifications
; sent by supervisor.

;[eventlistener:theeventlistenername]
;command=/bin/eventlistener    ; the program (relative uses PATH, can take args)
;process_name=%(program_name)s ; process_name expr (default %(program_name)s)
;numprocs=1                    ; number of processes copies to start (def 1)
;events=EVENT                  ; event notif. types to subscribe to (req'd)
;buffer_size=10                ; event buffer queue size (default 10)
;directory=/tmp                ; directory to cwd to before exec (def no cwd)
;umask=022                     ; umask for process (default None)
;priority=-1                   ; the relative start priority (default -1)
;autostart=true                ; start at supervisord start (default: true)
;autorestart=unexpected        ; restart at unexpected quit (default: unexpected)
;startsecs=10                  ; number of secs prog must stay running (def. 1)
;startretries=3                ; max # of serial start failures (default 3)
;exitcodes=0,2                 ; 'expected' exit codes for process (default 0,2)
;stopsignal=QUIT               ; signal used to kill process (default TERM)
;stopwaitsecs=10               ; max num secs to wait b4 SIGKILL (default 10)
;user=chrism                   ; setuid to this UNIX account to run the program
;redirect_stderr=true          ; redirect proc stderr to stdout (default false)
;stdout_logfile=/a/path        ; stdout log path, NONE for none; default AUTO
;stdout_logfile_maxbytes=1MB   ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups=10     ; # of stdout logfile backups (default 10)
;stdout_events_enabled=false   ; emit events on stdout writes (default false)
;stderr_logfile=/a/path        ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes=1MB   ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups        ; # of stderr logfile backups (default 10)
;stderr_events_enabled=false   ; emit events on stderr writes (default false)
;environment=A=1,B=2           ; process environment additions
;serverurl=AUTO                ; override serverurl computation (childutils)

; The below sample group section shows all possible group values,
; create one or more 'real' group: sections to create "heterogeneous"
; process groups.

;[group:thegroupname]
;programs=progname1,progname2  ; each refers to 'x' in [program:x] definitions
;priority=999                  ; the relative start priority (default 999)

; 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 = supervisord.d/*.ini
files = /var/supervisor/conf/*.conf

我的配置文件中,需要在/var/supervisor中创建3个文件夹,分别是conf,log,run.

run文件夹下有supervisord.pid和supervisor.sock

conf文件夹放配置文件(次配置文件存放目录)。

log文件夹放日志文件。
image.png

这样可以统一管理superviosr.

改好配置文件后。
如果启动呢?
安装superviosr会自动在/usr/bin目录下生成两个命令
image.png

使用supervisord命令即可启动
supervisord -c /etc/supervisord.conf

然后去/var/supervisor/conf目录下,添加对应的子进程配置文件。我的子配置文件如下,写了具体的注释,可以根据自己需求修改对应的配置项目。

[program:time] ;项目名称
directory = /home/wwwroor/test/public ; 程序的启动目录,项目根目录的上一级
command = /usr/local/php/bin/php index.php api/task/test ; 启动命令 
process_name=%(program_name)s_%(process_num)02d
numprocs = 1         ; 开启的进程数量
autostart = true     ; 在 supervisord 启动的时候也自动启动
startsecs = 15        ; 启动 5 秒后没有异常退出,就当作已经正常启动了
autorestart = true   ; 程序异常退出后自动重启
startretries = 300     ; 启动失败自动重试次数,默认是 3
user = root          ; 用哪个用户启动
redirect_stderr = true  ; 把 stderr 重定向到 stdout,默认 false
stdout_logfile_maxbytes = 50MB  ; stdout 日志文件大小,默认 50MB
stdout_logfile_backups = 20     ; stdout 日志文件备份数
; stdout 日志文件,需要手动创建目录(supervisord 会自动创建日志文件)
stdout_logfile = /var/supervisor/log/test.log
loglevel=info

其中主要的就是command配置,写的需要变成守护进程的命令。

然后重新加载配置

$ supervisorctl reread
$ supervisorctl update

查看子进程运行情况
supervisorctl status

image.png

这样就某些脚本以后守护进程的方式跑起来了,并且监控了它。
好啦,这样就有了监控的机制,项目的运行就稳定多啦,先分享到这,以后有新的经验在写啦。

本文为夜雨闻铃原创文章,转载无需和我联系,但请注明文章出处。文章出处:夜雨闻铃的思否文章 https://segmentfault.com/a/11...

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分享和记录自己成长之路遇到学习到的经验和遇到的坑(偏php和go)。为了更好更活跃的社区,尽一份自己的微...

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