Supervisor

1|0一、简介

	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，并监控进程状态，异常退出时能自动重启。

1|11.1 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。
	supervisor是所有进程的父进程，管理着启动的子进展，supervisor以子进程的PID来管理子进程，当子进程异常退出时supervisor可以收到相应的信号量。

1|21.2 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。
	
	supervisorctl是supervisor的命令行客户端（command-line client），提供类似shell的命令 交互功能。supervisorctl通过使用UNIX域套接字或Internet（TCP）套接字与supervisord服务端进行通信

1|31.3 平台要求

1. 各种类unix的机器上可以正常运行，比如Linux（Ubuntu 9.10），Mac OS X（10.4 / 10.5 / 10.6）和Solaris（10 for Intel）和FreeBSD 6.1
2. 在任何版本的Windows下，Supervisor 都不会运行。
3. Supervisor 可以使用Python 2.4或更高版本，但不能在任何版本的Python 3下使用

2|0二、安装

2|12.1 yum or apt

$ yum install -y supervisor
$ apt-get install supervisor

2|22.2 pip （推荐）

	一般 linux 服务器 会自带 2.4版本以上的python，可以直接调用 pip，所以比较推荐这种安装方式

$ pip install supervisor

2|32.3 下载包安装

wget https://pypi.python.org/packages/source/s/supervisor/supervisor-3.1.3.tar.gz
tar zxvf supervisor-3.1.3.tar.gz
cd supervisor-3.1.3
python setup.py install

安装完成后，查看是否安装成功

echo_supervisord_conf

3|0三、配置

3|13.1 主配置文件

1. 如果使用 yum 或者 apt 安装，会生成生成 supervisor的主配置文件，路径在/etc/supervisor/supervisord.conf 或者/etc/supervisord.conf 。同时还会生成配置目录 /etc/supervisord.d。
2. 如果使用其他安装方式，需要手动添加。

$ mkdir /etc/supervisor
$ echo_supervisord_conf > /etc/supervisor/supervisord.conf

3|23.2 子进程配置文件

	supervisor的配置文件默认是不全的，子进程的配置文件需要另外指定（改主配置的话所有管理的子进程会一起改掉）

$ mkdir /etc/supervisor/supervisord.d/

	在`/etc/supervisor/supervisord.d`的目录下创建`conf`和`log`两个目录，`conf`用于存放管理进程的配置，`log`用于存放管理进程的日志。

$ cd /etc/supervisor/supervisord.d
$ mkdir conf log

3|33.3 修改主配置文件

$ vim /etc/supervisor/supervisord.conf

我们先修改supervisord.conf最后的[include]部分配置：

特别注意：原来[include] 和 files 前都有冒号，要去掉

[include]
files = /etc/supervisor/supervisord.d/conf/*.conf # 就是之前创建的子进程的配置目录

也可以修改supervisor应用日志的目录，默认日志路径为/var/log/supervisor/supervisord.log。（一般不改，直接改子进程配置项）

vi /etc/supervisord.conf
...
[supervisord]
logfile=/var/log/supervisor/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/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
...

4|0四、启动 supervisor

4|14.1 使用 pip 或者安装包安装

$ supervisord

supervisor 默认在以下路径查找配置文件：/usr/etc/supervisord.conf, /usr/supervisord.conf, supervisord.conf, etc/supervisord.conf, /etc/supervisord.conf, /etc/supervisor/supervisord.conf

如需指定主配置文件，则需要使用-c参数：

$ supervisord -c /etc/supervisor/supervisord.conf

启动时候碰到 Unlinking stale socket /tmp/supervisor.sock，解决办法如下：

sudo unlink /tmp/supervisor.sock 

查看安装的版本：

$ supervisord -v
3.3.4

然后查看supervisor的状态：

$ supervisorctl status

>>>
这时候不报错就行，因为还没有守护进程

注： supervisord是主进程，supervisorctl是给守护进程发送命令的客户端工具。

4|24.2 使用 yum 或者 apt 安装

$ /etc/init.d/supervisor start

5|0五、简单示例

	先创建一个脚本 `/tmp/echo_time.sh`

#/bin/bash

while true; do
    echo `date +%Y-%m-%d,%H:%m:%s`
    sleep 2
done

​ 在/etc/supervisor/supervisord.d/conf新增子进程配置文件 echo_time.conf：

[program:echo_time]
command=sh /tmp/echo_time.sh
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. 10)
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 before SIGKILL (default 10)
user=root                 ; setuid to this UNIX account to run the program
log_stdout=true
log_stderr=true             ; if true, log program stderr (def false)
logfile=/tmp/echo_time.log
logfile_maxbytes=1MB        ; max # logfile bytes b4 rotation (default 50MB)
logfile_backups=10          ; # of logfile backups (default 10)
stdout_logfile_maxbytes=20MB  ; stdout 日志文件大小，默认 50MB
stdout_logfile_backups=20     ; stdout 日志文件备份数
stdout_logfile=/etc/supervisor/supervisord.d/log/echo_time.stdout.log

解释

[group:tornadoes]
programs=tornado-16018,tornado-16019

[program:tornado-16018]
directory=/home/XXX/PycharmProjects/NLPXXX_build/main ; 程序的启动目录
command=python runServer.py --port=16018 ; 启动命令，可以看出与手动在命令行启动的命令是一样的
autostart = true ; 在 supervisord 启动的时候也自动启动
startsecs = 30 ; 启动 10 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 = 3 ; 启动失败自动重试次数，默认是 3
user = XXX ; 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=10 ; stdout 日志文件备份数
; stdout 日志文件，需要注意当指定目录不存在时无法正常启动，所以需要手动创建目录（supervisord 会自动创建日志文件）
stdout_logfile=/home/XXX/PycharmProjects/log/tornado_16018.log

[program:tornado-16019]
directory=/home/XXX/PycharmProjects/NLPXXX/main ; 程序的启动目录
command=python runServer.py --port=16018 ; 启动命令，可以看出与手动在命令行启动的命令是一样的
autostart = true ; 在 supervisord 启动的时候也自动启动
startsecs = 30 ; 启动 10 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 = 3 ; 启动失败自动重试次数，默认是 3
user = XXX ; 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=10 ; stdout 日志文件备份数
; stdout 日志文件，需要注意当指定目录不存在时无法正常启动，所以需要手动创建目录（supervisord 会自动创建日志文件）
stdout_logfile=/home/damao/PycharmProjects/log/tornado_16019.log

然后启动程序：

$ supervisorctl reread
$ supervisorctl update

​ 这两个命令分别代表重新读取配置、更新子进程组。

​ 执行 supervisorctl reread 后输出

$ echo_time: available

​ 执行 supervisorctl update 后输出：

$ echo_time: added process group

​ 这样刚才添加的echo_time脚本就常驻运行起来了。通过日志查看运行情况：

$ tail -100f /etc/supervisor/supervisord.d/log/echo_time.stdout.log

>>>
2021-03-09,20:03:1615291846
2021-03-09,20:03:1615291848
2021-03-09,20:03:1615291850
2021-03-09,20:03:1615291852
2021-03-09,20:03:1615291854
2021-03-09,20:03:1615291856
2021-03-09,20:03:1615291858
2021-03-09,20:03:1615291860
2021-03-09,20:03:1615291862
2021-03-09,20:03:1615291864
2021-03-09,20:03:1615291866
...

也可以使用supervisorctl status查看子进程运行情况：

$ supervisorctl  status
>>>
echo_time      RUNNING   pid 28206, uptime 0:00:11

6|0六、配置文件

6|16.1 主配置

	主配置文件名： `supervisord.conf`。可以通过运行 `echo_supervisord_conf` 获得配置。根据`章节3.2`，已经创建在 `/etc/supervisor/supervisord.conf`，这个配置文件一般情况下不需要更改，除了最后的`[include]`部分，其余保持默认即可。

; 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]
file=/tmp/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)

; 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
;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=/tmp/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=/tmp/supervisord.pid ; supervisord pidfile; default supervisord.pid
nodaemon=false               ; start in foreground if true; default false
silent=false                 ; no logs to stdout 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
;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]
serverurl=unix:///tmp/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 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]
;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                   ; '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=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

6|26.2 子进程配置文件

根据`章节3.2`设置，一般放在：`/etc/supervisor/supervisord.d/conf`目录 。一个脚本对应一个配置文件。

配置说明：

;*为必须填写项
;*[program:应用名称]
[program:cat]

;*命令路径,如果使用python启动的程序应该为 python /home/test.py, 
;不建议放入/home/user/, 对于非user用户一般情况下是不能访问
command=/bin/cat

;当numprocs为1时,process_name=%(program_name)s;
当numprocs>=2时,%(program_name)s_%(process_num)02d
process_name=%(program_name)s

;进程数量
numprocs=1

;执行目录,若有/home/supervisor_test/test1.py
;将directory设置成/home/supervisor_test
;则command只需设置成python test1.py
;否则command必须设置成绝对执行目录
directory=/tmp

;掩码:--- -w- -w-, 转换后rwx r-x w-x
umask=022

;优先级,值越高,最后启动,最先被关闭,默认值999
priority=999

;如果是true,当supervisor启动时,程序将会自动启动
autostart=true

;*自动重启
autorestart=true

;启动延时执行,默认1秒
startsecs=10

;启动尝试次数,默认3次
startretries=3

;当退出码是0,2时,执行重启,默认值0,2
exitcodes=0,2

;停止信号,默认TERM
;中断:INT(类似于Ctrl+C)(kill -INT pid),退出后会将写文件或日志(推荐)
;终止:TERM(kill -TERM pid)
;挂起:HUP(kill -HUP pid),注意与Ctrl+Z/kill -stop pid不同
;从容停止:QUIT(kill -QUIT pid)
;KILL, USR1, USR2其他见命令(kill -l),说明1
stopsignal=TERM

stopwaitsecs=10

;*以root用户执行
user=root

;重定向
redirect_stderr=false

stdout_logfile=/a/path
stdout_logfile_maxbytes=1MB
stdout_logfile_backups=10
stdout_capture_maxbytes=1MB
stderr_logfile=/a/path
stderr_logfile_maxbytes=1MB
stderr_logfile_backups=10
stderr_capture_maxbytes=1MB

;环境变量设置
environment=A="1",B="2"

serverurl=AUTO

简化模板

[program:echo_time]
command=sh /tmp/echo_time.sh
autostart=true
autorestart=true
startsecs=10
startretries=3 
exitcodes=0,2
stopsignal=QUIT
stopwaitsecs=10
user=root
log_stdout=true
log_stderr=true
logfile=/tmp/echo_time.log
logfile_maxbytes=1MB
logfile_backups=10 
stdout_logfile_maxbytes=20MB 
stdout_logfile_backups=20 
stdout_logfile=/tmp/echo_time.stdout.log

如果上面的模板里增加下面两句：

process_name=%(process_num)02d
numprocs=3

执行supervisorctl update后会启动三个进程：

$ supervisorctl status
echo_time:00     RUNNING   pid 26762, uptime 2:06:12
echo_time:01     RUNNING   pid 26866, uptime 2:06:02
echo_time:02     RUNNING   pid 27975, uptime 2:05:52

这对于需要多进程消费的场景非常有用。

7|0七、命令行程序

7|17.1 supervisord

supervisord 是主进程，通过supervisord -h可以查看帮助说明。示例：

-c/--configuration FILENAME ;指定配置文件
-n/--nodaemon ;运行在前台（调试用）
-v/--version ;打印版本信息

-u/--user USER ;以指定用户（或用户ID）运行
-m/--umask UMASK ;指定子进程的umask，默认是022
-l/--logfile FILENAME ;指定日志文件
-e/--loglevel LEVEL ;指定日志级别

7|27.2 supervisorctl

supervisorctl 是客户端程序，用于向supervisord发起命令。

通过supervisorctl -h可以查看帮助说明。我们主要关心的是其action命令：

$ supervisorctl  help

default commands (type help <topic>):
=====================================
add    exit      open  reload  restart   start   tail   
avail  fg        pid   remove  shutdown  status  update 
clear  maintail  quit  reread  signal    stop    version

这些命令对于控制子进程非常重要。示例:

注意：示例中的<name> 为[program:name]的 name

reread ;重新加载配置文件
update ;将配置文件里新增的子进程加入进程组，如果设置了autostart=true则会启动新新增的子进程
status ;查看所有进程状态
status <name> ;查看指定进程状态
start all; 启动所有子进程
start <name>; 启动指定子进程
restart all; 重启所有子进程
restart <name>; 重启指定子进程
stop all; 停止所有子进程
stop <name>; 停止指定子进程
reload ;重启supervisord
add <name>; 添加子进程到进程组
reomve <name>; 从进程组移除子进程，需要先stop。注意：移除后，需要使用reread和update才能重新运行该进程

supervisord 有进程组process group的概念：只有子进程在进程组，才能被运行。

supervisorctl也支持交互式命令行：

$ supervisorctl
echo_time                        RUNNING   pid 27188, uptime 0:05:09
supervisor> version
3.3.4
supervisor> 

8|0八、web界面操作

需要开启supervisord.conf注释掉的这4行：

[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)

端口默认是监听127.0.0.1:9001，这里方便测试（使所有机器都能访问），修改为：

port=*:9001 

8|1注意：

Supervisor只能管理非daemon的进程，也就是说Supervisor不能管理守护进程。否则提示Exited too quickly (process log may have details)异常。例子中的Tomcat默认是以守护进程启动的，所以我们改成了catalina.sh run，以前台进程的方式运行。

下面是配置Tomcat进程的一个例子：

[program:tomcat]
command=/opt/apache-tomcat-8.0.35/bin/catalina.sh run
stdout_logfile=/opt/apache-tomcat-8.0.35/logs/catalina.out
autostart=true
autorestart=true
startsecs=5
priority=1
stopasgroup=true
killasgroup=true

9|0九、cesi集群监控

supervisor不支持跨机器的进程监控，一个supervisord只能监控本机上的程序，大大限制了supervisor的使用。

不过由于supervisor本身支持xml-rpc，因此也有一些基于supervisor二次开发的多机器进程管理工具。比如：

• Django-Dashvisor Web-based dashboard written in Python. Requires Django 1.3 or 1.4.
• Nodervisor Web-based dashboard written in Node.js.
• Supervisord-Monitor Web-based dashboard written in PHP.
• SupervisorUI Another Web-based dashboard written in PHP.
• cesi cesi is a web interface provides manage supervizors from same interface.

安装 CeSi 有三个依赖：Python3，Flask，sqlite3
从 Python 2.5 开始 sqlite3 已经在标准库内置了，所以也不需要安装 sqlite3 模块了； 另外很多 Linux 发行版已经自带 sqlite3，所以无需另外安装；
只需要安装 flask web 框架即可；

具体的安装直接看github README.md 即可

GitHub - gamegos/cesi: CeSI is a web interface for managing multiple supervisors from the same place.

$ export CESI_SETUP_PATH=~/cesi
$ mkdir ${CESI_SETUP_PATH}
$ cd ${CESI_SETUP_PATH}

$ # Download the project to ~/cesi directory
$ wget https://github.com/gamegos/cesi/releases/download/v2.7.1/cesi-extended.tar.gz -O cesi.tar.gz
$ tar -xvf cesi.tar.gz

$ # Create virtual environment and install requirement packages
$ python3 -m venv venv
$ source venv/bin/activate
(venv) $ pip3 install -r requirements.txt

$ # Run with command line
(venv) $ python3 ${CESI_SETUP_PATH}/cesi/run.py --config-file ${CESI_SETUP_PATH}/defaults/cesi.conf.toml

但是这里有个坑，官网建议的python版本为 python3.4，我用的是3.6版本，而在 requirements.txt 里面，已经把版本写死了：

flask==1.1.2
flask-sqlalchemy==2.4.3
psycopg2-binary==2.8.5
pymysql==0.9.3
tomlkit==0.5.11

在首次登录的时候，发现一直提示密码错误，在翻看了github 的 issues 后返现不止一个人碰到这个问题，解决方法为升级flask-sqlalchemy版本：

pip3 uninstall flask-sqlalchemy
pip3 install flask-sqlalchemy

配置文件地址${CESI_SETUP_PATH}/defaults/cesi.conf.toml：

# This is the main CeSI toml configuration file. It contains CeSI web application and
# supervisord information to connect

# This is the CeSI's own configuration.
[cesi]
# Database Uri
database = "sqlite:///users.db"                         # Relative path
# Etc
#database = "sqlite:////opt/cesi/< version >/users.db"  # Absolute path
#database = "postgres://<user>:<password>@localhost:5432/<database_name>"
#database = "mysql+pymysql://<user>:<password>@localhost:3306/<database_name>"
activity_log = "activity.log"   # File path for CeSI logs
admin_username = "admin"        # Username of admin user
admin_password = "admin"        # Password of admin user

# This is the definition section for new supervisord node.
# [[nodes]]
# name = "api"          # (String) Unique name for supervisord node.
# environment = ""      # (String) The environment name provides logical grouping of supervisord nodes. It can be used as filtering option in the UI.
# username = ""         # (String) Username of the XML-RPC interface of supervisord Set nothing if no username is configured
# password = ""         # (String) Password of the XML-RPC interface of supervisord. Set nothing if no username is configured
# host = "127.0.0.1"    # (String) Host of the XML-RPC interface of supervisord
# port = "9001"         # (String) Port of the XML-RPC interface of supervisord

# Default supervisord nodes
 [[nodes]]
 name = "products-server"
 environment = ""
 username = "tester"
 password = "t@987654321"
 host = "192.168.8.129"
 port = "9001"

# [[nodes]]
# name = "analysis-server"
# environment = ""
# username = "user123"
# password = "pass123"
# host = "analysis.example.com"
# port = "9001"

# [[nodes]]
# name = "monitoring-server"
# environment = ""
# username = ""
# password = ""
# host = "monitoring.example.com"
# port = "9001"

参考：

1、Supervisor使用教程 - 飞鸿影 - 博客园 (cnblogs.com)

__EOF__

本文作者：😎
本文链接：https://www.cnblogs.com/dongye95/p/14507350.html
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