• 利用Supervisor来守护我们自己的进程


    Supervisor

    安装supervisor

    • 利用python的pip或者easy_install来安装
    easy_install supervisor
    或者
    pip installsupervisor
    

    生成默认配置文件

    echo_supervisord_conf > /etc/supervisord.conf
    

    启动准备

    • 创建配置文件来存放自己的多个配置文件
    mkdir /etc/supervisord.conf.d
    
    • 修改默认配置
    #include区段修改为
    [include]
    files =/etc/supervisord.conf.d/*.conf
    
    • 网页访问
    #如需要访问web控制界面,inet_http_server区段修改为
    [inet_http_server]
    port=0.0.0.0:9001
    username=username ; 你的用户名
    password=password ; 你的密码
    
    • 注意事项
    1. 每个需要管理的进程分别写在一个文件里面,放在/etc/supervisord.conf.d/目录下,便于管理。例如:test.conf

    将supervisord加入系统服务

    vim /etc/init.d/supervisord
    

    • 启动脚本如下
    # 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/init.d/functions
    RETVAL=0
    prog="supervisord"
    pidfile="/tmp/supervisord.pid"
    lockfile="/var/lock/subsys/supervisord"
    start()
    {       
            echo -n $"Starting $prog: "
            daemon --pidfile $pidfile supervisord -c /etc/supervisord.conf
            RETVAL=$?
            echo
            [ $RETVAL -eq 0 ] && touch ${lockfile}
    }
    stop()
    {       
            echo -n $"Shutting down $prog: "
            killproc -p ${pidfile} /usr/bin/supervisord
            RETVAL=$?
            echo 
            if [ $RETVAL -eq 0 ] ; then
                    rm -f ${lockfile} ${pidfile}
            fi
    }
    case "$1" in
      start)
        start
      ;;
      stop)
        stop
      ;;
      status)
            status $prog
      ;;
      restart)
        stop
        start
      ;;
      *)
        echo "Usage: $0 {start|stop|restart|status}"
      ;;
    esac
    
    • 添加执行权限
    chmod +x /etc/init.d/supervisord
    
    • 启动
    chkconfig supervisordon
    service supervisord start
    

    配置文件实例,主要为末尾部分

          ; 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".
            ;  - Comments must have a leading space: "a=b ;comment" not "a=b;comment".
    
            [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))
    
            ;[inet_http_server]         ; inet (TCP) server disabled by default
            ;port=0.0.0.0:9001    #修改可以访问的ip地址,一般为全部可以访问      ; (ip_address:port specifier, *:port for all iface)
            ;username=root              ; (default is no username (open server))
            ;password=test              ; (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           ; (num of main logfile rotation backups;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=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:///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 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)
            ;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 (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)
            ;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 (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 (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 = files = /etc/supervisord.conf.d/*.conf  ##修改的地方
            #添加以下内容在第一个节点上,其他节点只需要最后的;storm supervisor
            ; storm nimbus
            [program:storm-nimbus]
            command=/data/dmp/storm/bin/nimbus-start.sh
            directory=/data/dmp/storm
            autorestart=true
            autostart=true
            startsecs=5
            startretries=20
            stopsignal=QUIT
            user=root
    
            ; storm ui
            [program:storm-ui]
            command=/data/dmp/storm/bin/ui-start.sh
            directory=/data/dmp/storm
            autorestart=true
            autostart=true
            startsecs=5
            startretries=20
            user=root
    
            ;storm supervisor
            [program:storm-supervisor]
            command=/data/dmp/storm/bin/supervisor-start.sh
            directory=/data/dmp/storm
            autorestart=true
            autostart=true
            startsecs=5
            startretries=20
            user=root
    

    配置文件说明

    ;*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
    

    常用信号说明

    信号名称 数字表示 说明
    SIGHUP 1 终端挂起或控制进程终止。当用户退出Shell时,由该进程启动的所有进程都会收到这个信号,默认动作为终止进程。
    SIGINT 2 键盘中断。当用户按下组合键时,用户终端向正在运行中的由该终端启动的程序发出此信号。默认动作为终止进程。
    SIGQUIT 3 键盘退出键被按下。当用户按下或组合键时,用户终端向正在运行中的由该终端启动的程序发出此信号。默认动作为退出程序。
    SIGFPE 8 发生致命的运算错误时发出。不仅包括浮点运算错误,还包括溢出及除数为0等所有的算法错误。默认动作为终止进程并产生core文件。
    SIGKILL 9 无条件终止进程。进程接收到该信号会立即终止,不进行清理和暂存工作。该信号不能被忽略、处理和阻塞,它向系统管理员提供了可以杀死任何进程的方法。
    SIGALRM 14 定时器超时,默认动作为终止进程。
    SIGTERM 15 程序结束信号,可以由 kill 命令产生。与SIGKILL不同的是,SIGTERM 信号可以被阻塞和终止,以便程序在退出前可以保存工作或清理临时文件等。
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  • 原文地址:https://www.cnblogs.com/forsaken627/p/6511325.html
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