supervisor进程管理

一：什么是 supervisor

超级用户，监管员的意思，Supervisor是一个进程管理工具，当进程中断的时候Supervisor能自动重新启动它。可以运行在各种类unix的机器上，supervisor就是用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（守护进程），并监控进程状态，异常退出时能自动重启。

-supervisord：运行 Supervisor 时会启动一个进程 supervisord，它负责启动所管理的进程，并将所管理的进程作为自己的子进程来启动，而且可以在所管理的进程出现崩溃时自动重启。

- supervisorctl：是命令行管理工具，可以用来执行 stop、start、restart 等命令，来对这些子进程进行管理。

二：安装 supervisor 

CentOS Linux release 7.5.1804 (Core)

pip3 install supervisor  安装supervisor

pip3 list

supervisor安装成功后，会生成三个执行程序，分别为 supervisord（用于接收进程管理命令）、supervisorctl（用于接收客户端命令，和守护进程通信，发送管理进程的指令）、echo_supervisord_conf（生成初始配置文件的程序）

supervisor是一个C/S模型的程序，客户/服务端，supervisord是server端，supervisorctl是client端

在home下新建一个conf文件夹，可以通过运行echo_supervisord_conf程序生成supervisor的初始化配置文件

conf下多出了一个文件

vim看看配置文件的一些参数；开头的文件表示注释

; 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.
;  - Comments must have a leading space: "a=b ;comment" not "a=b;comment".
;  - Command will be truncated if it looks like a config file comment, e.g.
;    "command=bash -c 'foo ; bar'" will truncate to "command=bash -c 'foo ".
;
; Warning:
;  Paths throughout this example file use /tmp because it is available on most
;  systems.  You will likely need to change these to locations more appropriate
;  for your system.  Some systems periodically delete older files in /tmp.
;  Notably, if the socket file defined in the [unix_http_server] section below
;  is deleted, supervisorctl will be unable to connect to supervisord.

[unix_http_server]  # 系统配置
file=/tmp/supervisor.sock   ; the path to the socket file # 系统socket文件，supervisorctl会使用这个
;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)

; Security Warning:
;  The inet HTTP server is not enabled by default.  The inet HTTP server is
;  enabled by uncommenting the [inet_http_server] section below.  The inet
;  HTTP server is intended for use within a trusted environment only.  It
;  should only be bound to localhost or only accessible from within an
;  isolated, trusted network.  The inet HTTP server does not support any
;  form of encryption.  The inet HTTP server does not use authentication
;  by default (see the username= and password= options to add authentication).
;  Never expose the inet HTTP server to the public internet.

;[inet_http_server]         ; inet (TCP) server disabled by default # web管理页面
;port=127.0.0.1:9001        ; ip_address:port specifier, *:port for all iface  # web管理后台运行的IP和端口，可以开放到公网
;username=user              ; default is no username (open server) 
;password=123               ; default is no password (open server)

[supervisord] # 服务端
logfile=/tmp/supervisord.log ; main log file; default $CWD/supervisord.log # 默认日志文件
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=/tmp/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=supervisord            ; setuid to this UNIX account at startup; recommended 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 # 是否前台启动，默认是false,以deamon的方式启动
;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 rpcinterface:supervisor 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:x] sections.

[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface

; The supervisorctl section configures how supervisorctl will connect to
; supervisord.  configure it match the settings in either the unix_http_server
; or inet_http_server section.

[supervisorctl] # 客户端
serverurl=unix:///tmp/supervisor.sock ; use a unix:// URL  for a unix socket  # 通过unix socket连接 superviosrd，路径与unix_http_server相同
;serverurl=http://127.0.0.1:9001 ; use an http:// url to specify an inet socket
;username=chris              ; should be same as in [*_http_server] if set
;password=123                ; 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]  # 这里就是自己需要写的被管理进程的配置
;command=/bin/cat              ; the program (relative uses PATH, can take args) # 程序启动的命令
;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) # 进程启动的优先级，默认999，值越小，越先启动，几个进程的时候，先后顺序通过这个值控制。
;autostart=true                ; start at supervisord start (default: true) # 在supervisord启动的时候也自动启动
;startsecs=1                   ; # of secs prog must stay up to be running (def. 1) # 启动1秒后没有异常退出，就表示进程正常启动了，默认是1秒，这个值可以设置为10秒。
;startretries=3                ; max # of serial start failures when starting (default 3) # 启动失败自动重试次数
;autorestart=unexpected        ; when to restart if exited after running (def: unexpected) # 程序退出后自动启动，三个可选值[unexpected,true,false]，默认是是unexpected，表示进程意外杀死才重启。
;exitcodes=0                   ; 'expected' exit codes used with autorestart (default 0)
;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  # 用哪个用户启动进程，默认是chrism,一般修改为root
;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)
;stdout_syslog=false           ; send stdout to syslog with process name (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)
;stderr_syslog=false           ; send stderr to syslog with process name (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                   ; 'expected' exit codes used with autorestart (default 0)
;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)
;stdout_syslog=false           ; send stdout to syslog with process name (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)
;stderr_syslog=false           ; send stderr to syslog with process name (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

三：实际项目的配置 inout_manage.conf   /etc/supervisord.d/

[program: inoutctrl]  # 名称，supervisorctl 会显示这个名称
command=/usr/bin/python3 passcolony_manager.py ; 指定python解释器运行程序的命令
directory=/root/jgw/qlzy_platform/inOrOutCenter ; 命令执行的目录
autorestart=true ; 程序意外退出是否自动重启
autostart=true ; 是否自动启动
stderr_logfile=/var/log/inoutctrl_py.err.log ; 错误日志文件
stdout_logfile=/var/log/inoutctrl_py.out.log ; 输出日志文件
environment=ASPNETCORE_ENVIRONMENT=Production ; 进程环境变量
user=root ; 进程执行的用户身份
stopsignal=INT
startsecs=10 ; 自动重启间隔
stopwaitsecs = 600
priority=15

supervisord启动成功后，可以通过supervisorctl客户端控制进程，启动、停止、重启。运行supervisorctl命令，不加参数，会进入supervisor客户端的交互终端，并会列出当前所管理的所有进程。 

help查看，可以执行的指令

四：自己配置的supervisord启动方式

首先保证启动server端， supervisord -c /home/conf/supervisord.conf

这里是server客户端读取指定路径下的配置文件，默认是从/usr/local/etc/supervisord.conf, /usr/local/supervisord.conf, supervisord.conf, etc/supervisord.conf, /etc/supervisord.conf, /etc/supervisor/supervisord.conf，这几个路径去读取。因为在第二步，修改了supervisord.conf的路径，因此要指定路径去启动

启动server后，启动客户端，出现以上提示：查看supervisord.conf

;serverurl=http://127.0.0.1:9001 ; use an http:// url to specify an inet socket

这一项注释着，使用的socket进行启动的，还是指定路径进行启动

此时没有任何进程被指定

创建一个test.py的文件

import time

while 1:
　　print(1)

然后在 /home/conf/conf.d 创建一个文件夹 conf.d，在conf.d里面创建 test.ini

[program:test]
command=/usr/bin/python3 test.py
directory=/home
autorestart=true
autostart=true
environment=ASPNETCORE_ENVIRONMENT=Production
user=root
stopsignal=INT
startsecs=10
stopwaitsecs = 600
priority=15

然后修改  /home/conf/supervisord.conf  里面的include的file路径

[include]
files = /home/conf/conf.d/*.ini

 重启 supervisord

supervisord -c /home/conf/supervisord.conf

supervisorctl -c /home/conf/supervisord.conf

unix:///tmp/supervisor.sock no such file" 错误处理  ：http://www.cashqian.net/blog/001472975510127673ea63db9234c4e8293cf43cefcafde000

新添加一个 ini后，启动 supervisord报错

Error: Another program is already listening on a port that one of our HTTP servers is configured to use. Shut this program down first before starting supervisord.
For help, use /usr/local/bin/supervisord -h

解决办法：unlink /var/run/supervisor.sock

然后执行

supervisord -c /home/conf/supervisord.conf

supervisorctl -c /home/conf/supervisord.conf

六：supervisor管理celery定时任务

# TODO