Supervisor的使用

雨点打透心脏的1/2处 2022-05-22 23:57 244阅读 0赞

> 本文个人博客地址：[http://www.huweihuang.com/article/linux/supervisor-usage/][http_www.huweihuang.com_article_linux_supervisor-usage]

## 1. Supervisor简介 ##

Supervisord 是用 Python 实现的一款的进程管理工具，supervisord 要求管理的程序是非 daemon 程序，supervisord 会帮你把它转成 daemon 程序，因此如果用 supervisord 来管理进程，进程需要以非daemon的方式启动。

例如：管理nginx 的话，必须在 nginx 的配置文件里添加一行设置 daemon off 让 nginx 以非 daemon 方式启动。

## 2. Supervisor安装 ##

以centos系统为例，以下两种方式选择其一。

# yum install 的方式
    yum install -y supervisor
    
    # easy_install的方式
    yum install -y python-setuptools
    easy_install supervisor
    echo_supervisord_conf >/etc/supervisord.conf

## 3. Supervisor的配置 ##

### 3.1. supervisord.conf的配置 ###

如果使用`yum install -y supervisor`的命令安装，会生成默认配置`/etc/supervisord.conf`和目录`/etc/supervisord.d`，如果没有则自行创建。

在`/etc/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/supervisord.d
    mkdir conf log

修改`/etc/supervisord.conf`的`[include]`部分，即载入`/etc/supervisord.d/conf`目录下的所有配置。

vi /etc/supervisord.conf
    ...
    [include]
    files = supervisord.d/conf/*.conf
    ...

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`。

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)
    ...

### 3.2. 管理应用的配置 ###

进入到`/etc/supervisord.d/conf`目录，创建管理应用的配置，可以创建多个应用配置。

例如，创建`confd.conf`配置。

[program:confd]
    directory = /usr/local/bin ; 程序的启动目录
    command = /usr/local/bin/confd -config-file /etc/confd/confd.toml ; 启动命令，与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 = 5 ; 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 = 3 ; 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 = 20MB ; 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 = /etc/supervisord.d/log/confd.log ;日志统一放在log目录下
    ; 可以通过 environment 来添加需要的环境变量，一种常见的用法是修改 PYTHONPATH
    ; environment=PYTHONPATH=$PYTHONPATH:/path/to/somewhere

## 4. Surpervisor的启动 ##

# supervisord二进制启动
    supervisord -c /etc/supervisord.conf
    # 检查进程
    ps aux | grep supervisord

或者以systemd的方式管理

vi /etc/rc.d/init.d/supervisord

#!/bin/sh
    #
    # /etc/rc.d/init.d/supervisord
    #
    # Supervisor is a client/server system that
    # allows its users to monitor and control a
    # number of processes on UNIX-like operating
    # systems.
    #
    # chkconfig: - 64 36
    # description: Supervisor Server
    # processname: supervisord
    
    # Source init functions
    . /etc/rc.d/init.d/functions
    
    prog="supervisord"
    
    prefix="/usr"
    exec_prefix="${prefix}"
    prog_bin="${exec_prefix}/bin/supervisord"
    PIDFILE="/var/run/$prog.pid"
    
    start()
    {
           echo -n $"Starting $prog: "
           daemon $prog_bin --pidfile $PIDFILE -c /etc/supervisord.conf
           [ -f $PIDFILE ] && success $"$prog startup" || failure $"$prog startup"
           echo
    }
    
    stop()
    {
           echo -n $"Shutting down $prog: "
           [ -f $PIDFILE ] && killproc $prog || success $"$prog shutdown"
           echo
    }
    
    case "$1" in
    
     start)
       start
     ;;
    
     stop)
       stop
     ;;
    
     status)
           status $prog
     ;;
    
     restart)
       stop
       start
     ;;
    
     *)
       echo "Usage: $0 {start|stop|restart|status}"
     ;;
    
    esac

设置开机启动及systemd方式启动。

sudo chmod +x /etc/rc.d/init.d/supervisord
    sudo chkconfig --add supervisord
    sudo chkconfig supervisord on
    sudo service supervisord start

## 5. supervisorctl&supervisord ##

Supervisord 安装完成后有两个可用的命令行 `supervisord` 和 `supervisorctl`，命令使用解释如下：

### 5.1. supervisorctl ###

*  `supervisorctl stop programxxx`，停止某一个进程(programxxx)，programxxx 为 \[program:beepkg\] 里配置的值，这个示例就是 beepkg。
 *  `supervisorctl start programxxx`，启动某个进程。
 *  `supervisorctl restart programxxx`，重启某个进程。
 *  `supervisorctl status`，查看进程状态。
 *  `supervisorctl stop groupworker` ，重启所有属于名为 groupworker 这个分组的进程(start,restart 同理)。
 *  `supervisorctl stop all`，停止全部进程，注：start、restart、stop 都不会载入最新的配置文件。
 *  `supervisorctl reload`，载入最新的配置文件，停止原有进程并按新的配置启动、管理所有进程。
 *  `supervisorctl update`，根据最新的配置文件，启动新配置或有改动的进程，配置没有改动的进程不会受影响而重启。

更多参考：

$ supervisorctl --help
    supervisorctl -- control applications run by supervisord from the cmd line.
    
    Usage: /usr/bin/supervisorctl [options] [action [arguments]]
    
    Options:
    -c/--configuration -- configuration file path (default /etc/supervisord.conf)
    -h/--help -- print usage message and exit
    -i/--interactive -- start an interactive shell after executing commands
    -s/--serverurl URL -- URL on which supervisord server is listening
         (default "http://localhost:9001").
    -u/--username -- username to use for authentication with server
    -p/--password -- password to use for authentication with server
    -r/--history-file -- keep a readline history (if readline is available)
    
    action [arguments] -- see below
    
    Actions are commands like "tail" or "stop".  If -i is specified or no action is
    specified on the command line, a "shell" interpreting actions typed
    interactively is started.  Use the action "help" to find out about available
    actions.

例如：

# supervisorctl status
    confd                            RUNNING   pid 31256, uptime 0:11:24
    twemproxy                        RUNNING   pid 31255, uptime 0:11:24

### 5.2. supervisord ###

*  supervisord，初始启动 Supervisord，启动、管理配置中设置的进程。

$ supervisord --help
    supervisord -- run a set of applications as daemons.
    
    Usage: /usr/bin/supervisord [options]
    
    Options:
    -c/--configuration FILENAME -- configuration file -n/--nodaemon -- run in the foreground (same as 'nodaemon true' in config file) -h/--help -- print this usage message and exit -v/--version -- print supervisord version number and exit -u/--user USER -- run supervisord as this user (or numeric uid) -m/--umask UMASK -- use this umask for daemon subprocess (default is 022) -d/--directory DIRECTORY -- directory to chdir to when daemonized -l/--logfile FILENAME -- use FILENAME as logfile path -y/--logfile_maxbytes BYTES -- use BYTES to limit the max size of logfile -z/--logfile_backups NUM -- number of backups to keep when max bytes reached -e/--loglevel LEVEL -- use LEVEL as log level (debug,info,warn,error,critical) -j/--pidfile FILENAME -- write a pid file for the daemon process to FILENAME -i/--identifier STR -- identifier used for this instance of supervisord -q/--childlogdir DIRECTORY -- the log directory for child process logs -k/--nocleanup -- prevent the process from performing cleanup (removal of                    old automatic child log files) at startup.
    -a/--minfds NUM -- the minimum number of file descriptors for start success -t/--strip_ansi -- strip ansi escape codes from process output --minprocs NUM -- the minimum number of processes available for start success --profile_options OPTIONS -- run supervisord under profiler and output                              results based on OPTIONS, which  is a comma-sep'd
                                 list of 'cumulative', 'calls', and/or 'callers',
                                 e.g. 'cumulative,callers')

## 6. Supervisor控制台 ##

在`/etc/supervisord.conf`中修改`[inet_http_server]`的参数，具体如下：

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

修改后重启supervisor进程，在浏览器访问 `http://<host-ip>:9001`。

具体如下：  
![这里写图片描述][70]

## 7. supervisor.conf详细配置 ##

cat /etc/supervisord.conf

; Sample supervisor config file.
    
    [unix_http_server]
    file=/var/run/supervisor/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/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)
    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/run/supervisor/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/conf/*.conf

参考：

[http://supervisord.org/][http_supervisord.org]

[http_www.huweihuang.com_article_linux_supervisor-usage]: http://www.huweihuang.com/article/linux/supervisor-usage/
[70]: /images/20220523/aff797d3aa1c47f1b493128c491c1c91.png
[http_supervisord.org]: http://supervisord.org/