应用背景

本项目在v0.1版本出来后，需要搭载在VPS上，但是问题在于此VPS不是一个人在用，存在别人不小心中断该进程的情况。所以为了防止这种以及其他意外中断的情况，在师兄的建议下，使用了supervisor这个软件。

软件介绍

supervisor是用python编写的，在之前我也想自己简单写一个适用于本项目的类似软件。师兄觉得时间可能会多一点，且没必要，现在看来，中间的坑浪费的时间足有两天，已经够我自己写了，但碰到坑，我总会扛到底，很是无奈。
supervisor由两部分构成（C/S结构），一个是server端的supervisord，另一个则是client端的supervisorctl。总体的配置是由supervisord来进行，具体的某个进程由supervisorctl进行单门的启动和关闭。

在本项目中的应用

由于本项目的要求即是自动运行某进程，使其在意外中断的情况进行重启，扮演守护进程的角色，所以只用到两个功能：
1.运行。
2.输出日志

配置环境

#
 uname -a
 Linux 2.6.32-042stab128.2 #1 SMP Thu Mar 22 10:58:36 MSK 2018 x86_64 x86_64 x86_64 GNU/Linux
 root@JAW8:/etc#   lsb_release -a
 No LSB modules are available.
 Distributor ID:    Ubuntu
 Description:   Ubuntu 14.04.5 LTS
 Release:   14.04
 Codename:  trusty

安装过程

我试过多种安装，主要分两种：
1.安装工具pip或apt-get或easy_install来安装

pip install supervisor

或者

easy_install supervisor

或者

apt-get install supervisor

2.通过下载安装

github上的搜索结果

我安装成功的是用了pip，注意是python2版本

配置过程

主要分两个步骤，第一个是修改整体配置文件，第二个则是创建单个进程的配置

第一步：修改并配置整体supervisord.conf

这里有两个坑，一定要注意
第一个：
需用到一条命令，这个是pip安装方式所特有的：

echo_supervisor > /etc/supervisord.conf

这样整体的配置文件就生成了，里面的每个模块，每个参数的具体意义，建议参照官方文档，别乱看教程
这是官方链接：http://supervisord.org/configuration.html

坑来了：

里面的/tmp目录都修改了，我的改法是：

[unix_http_server]
file=/var/run/supervisor.sock   ; the path to the socket file
;chmod=0700                 ; socket 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/log/supervisord.log ; main log file; default $CWD/supervisord.log
logfile_maxbytes=50MB        ; max main logfile bytes b4 rotation; default 50MB
logfile_backups=10           ; # of main logfile backups; 0 means none, default 10
loglevel=info                ; log level; default info; others: debug,warn,trace
pidfile=/var/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
[supervisorctl]
serverurl=unix:///var/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=你自己的用户名             ; should be same as in [*_http_server] if set
password=自己的密码               ; should be same as in [*_http_server] if set
;prompt=mysupervisor         ; cmd line prompt (default "supervisor")
;history_file=~/.sc_history  ; use readline history if available

; The sample program section below 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)
;startsecs=1                   ; # of secs prog must stay up to be running (def. 1)
;startretries=3                ; max # of serial start failures when starting (default 3)
;autorestart=unexpected        ; when to restart if exited after running (def: unexpected)
;exitcodes=0,2                 ; 'expected' exit codes used with autorestart (default 0,2)
;stopsignal=QUIT               ; signal used to kill process (default TERM)
;stopwaitsecs=10               ; max num secs to wait b4 SIGKILL (default 10)
;stopasgroup=false             ; send stop signal to the UNIX process group (default false)
;killasgroup=false             ; SIGKILL the UNIX process group (def false)
;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 (0 means none, 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 (0 means none, 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 sample eventlistener section below shows all possible eventlistener
; subsection values.  Create one or more 'real' eventlistener: sections to be
; able to handle event notifications sent by supervisord.

;[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)
;startsecs=1                   ; # of secs prog must stay up to be running (def. 1)
;startretries=3                ; max # of serial start failures when starting (default 3)
;autorestart=unexpected        ; autorestart if exited after running (def: unexpected)
;exitcodes=0,2                 ; 'expected' exit codes used with autorestart (default 0,2)
 ;stopsignal=QUIT               ; signal used to kill process (default TERM)
;stopwaitsecs=10               ; max num secs to wait b4 SIGKILL (default 10)
;stopasgroup=false             ; send stop signal to the UNIX process group (default false)
;killasgroup=false             ; SIGKILL the UNIX process group (def false)
;user=chrism                   ; setuid to this UNIX account to run the program
;redirect_stderr=false         ; redirect_stderr=true is not allowed for eventlisteners
;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 (0 means none, 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=10     ; # of stderr logfile backups (0 means none, 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 sample group section below 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 = relative/directory/*.ini
files = /etc/supervisor/*.conf

留意这些目录，一定要保证存在，没有就自己建。开始适用时，可以直接用

 supervisor -c /etc/supervisord.conf

来初步运行，-c是为了制定目录，你可以换目录存放，但一定要一致。
如果报已运行，或sock无法连接等，一般是初步运行的supervisor没有停止所以需要查看进程并将其关闭，具体方法如下：

ps -aux|grep supervisor
root     17177  0.0  0.3  54020  7048 ?        Ss   10:09   0:00 /usr/bin/python /usr/local/bin/supervisord -c /etc/supervisord.conf
root     17688  0.0  0.0   8820   780 pts/0    S+   11:16   0:00 grep --color=auto supervisor

最后一个不需要关，其他的都关掉

kill -9 PID

每次不行就可以尝试这些，反正就是关了开，配下，不行，再关，行了又想修改，再关。。
我之前在这些问题上纠结了很久

第二个坑：单个配置文件的加载目录由整体配置文件的最后一行决定，即

[include]
;files = relative/directory/*.ini
files = /etc/supervisor/*.conf

一定要将【include】前边的注释符去掉，这个把我整疯了

第二步：修改单个的配置

单个配置：
官方有，但我也给个自己的吧，不需要很复杂，具有自启动和输出日志即可

  #名字
[program:进程名]

directory=项目路径

command=/usr/bin/python3   /项目路径/程序.py
#supervisor
autostart=true


autorestart=true

startsecs=1

stderr_logfile=/run/Fanucpot/tmp_log/blog_stderr.log
stdout_logfile=/run/Fanucpot/tmp_log/blog_stdout.log

;user = 用户名（此处不用，注释了）
redirect_stderr = true

;stdout_logfile_maxbytes = 20M

;stdout_logfile_backups = 20

注意：不需要的就直接用；注释掉

收工

下来就是每个进程配一个配置，打开supervisorctl，有一些简单的命令，开启，关闭，查看单个进程的状态，此处不赘述

supervisorctl

即可进入客户端，做你想做的事情。