Supervisor进程控制系统

介绍

Supervisor是一个进程控制系统&＃xff0c;它的作用是&＃xff1a;你的Nginx&＃xff0c;Tomcat&＃xff0c;memcache&＃xff0c;Redis...会崩么&＃xff0c;不会&＃xff1f;好吧&＃xff0c;那你自己写的服务器监测脚本呢&＃xff1f;好吧&＃xff0c;不要再纠结了&＃xff0c;交给Supervisor吧&＃xff0c;它会帮你维护这些&＃xff0c;即使它们不小心崩了&＃xff0c;Supervisor会帮你看住它们&＃xff0c;维护它们。这种方式可以解决nginx、php_fpm在一个docker容器里开机自启动&＃xff0c;不需要人工操作

安装

1、yum -y install supervisor

配置文件解释

[unix_http_server]
file&＃61;/tmp/supervisor.sock ;UNIX socket 文件&＃xff0c;supervisorctl 会使用
;chmod&＃61;0700 ;socket文件的mode&＃xff0c;默认是0700
;chown&＃61;nobody:nogroup ;socket文件的owner&＃xff0c;格式&＃xff1a;uid:gid;[inet_http_server] ;HTTP服务器&＃xff0c;提供web管理界面
;port&＃61;127.0.0.1:9001 ;Web管理后台运行的IP和端口&＃xff0c;如果开放到公网&＃xff0c;需要注意安全性
;username&＃61;user ;登录管理后台的用户名
;password&＃61;123 ;登录管理后台的密码[supervisord]
logfile&＃61;/tmp/supervisord.log ;日志文件&＃xff0c;默认是 $CWD/supervisord.log
logfile_maxbytes&＃61;50MB ;日志文件大小&＃xff0c;超出会rotate&＃xff0c;默认 50MB&＃xff0c;如果设成0&＃xff0c;表示不限制大小
logfile_backups&＃61;10 ;日志文件保留备份数量默认10&＃xff0c;设为0表示不备份
loglevel&＃61;info ;日志级别&＃xff0c;默认info&＃xff0c;其它: debug,warn,trace
pidfile&＃61;/tmp/supervisord.pid ;pid 文件
nodaemon&＃61;false ;是否在前台启动&＃xff0c;默认是false&＃xff0c;即以 daemon 的方式启动
minfds&＃61;1024 ;可以打开的文件描述符的最小值&＃xff0c;默认 1024
minprocs&＃61;200 ;可以打开的进程数的最小值&＃xff0c;默认 200[supervisorctl]
serverurl&＃61;unix:///tmp/supervisor.sock ;通过UNIX socket连接supervisord&＃xff0c;路径与unix_http_server部分的file一致
;serverurl&＃61;http://127.0.0.1:9001 ; 通过HTTP的方式连接supervisord; [program:xx]是被管理的进程配置参数&＃xff0c;xx是进程的名称
[program:xx]
command&＃61;/opt/apache-tomcat-8.0.35/bin/catalina.sh run ; 程序启动命令
autostart&＃61;true ; 在supervisord启动的时候也自动启动
startsecs&＃61;10 ; 启动10秒后没有异常退出&＃xff0c;就表示进程正常启动了&＃xff0c;默认为1秒
autorestart&＃61;true ; 程序退出后自动重启,可选值&＃xff1a;[unexpected,true,false]&＃xff0c;默认为unexpected&＃xff0c;表示进程意外杀死后才重启
startretries&＃61;3 ; 启动失败自动重试次数&＃xff0c;默认是3
user&＃61;tomcat ; 用哪个用户启动进程&＃xff0c;默认是root
priority&＃61;999 ; 进程启动优先级&＃xff0c;默认999&＃xff0c;值小的优先启动
redirect_stderr&＃61;true ; 把stderr重定向到stdout&＃xff0c;默认false
stdout_logfile_maxbytes&＃61;20MB ; stdout 日志文件大小&＃xff0c;默认50MB
stdout_logfile_backups &＃61; 20 ; stdout 日志文件备份数&＃xff0c;默认是10
; stdout 日志文件&＃xff0c;需要注意当指定目录不存在时无法正常启动&＃xff0c;所以需要手动创建目录&＃xff08;supervisord 会自动创建日志文件&＃xff09;
stdout_logfile&＃61;/opt/apache-tomcat-8.0.35/logs/catalina.out
stopasgroup&＃61;false ;默认为false,进程被杀死时&＃xff0c;是否向这个进程组发送stop信号&＃xff0c;包括子进程
killasgroup&＃61;false ;默认为false&＃xff0c;向进程组发送kill信号&＃xff0c;包括子进程;包含其它配置文件
[include]
files &＃61; relative/directory/*.ini ;可以指定一个或多个以.ini结束的配置文件

配置自己的文件

注意&＃xff1a;supervisor不能监控后台进程&＃xff0c;command 不能为后台运行命令
所以服务都只能放在前台运行&＃xff0c;不能再后台

1、vi /etc/supervisord.conf &＃xff08;只改后面的include就可以了&＃xff09;

; 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&＃61;b ;comment" not "a&＃61;b;comment".[unix_http_server]
file&＃61;/tmp/supervisor.sock ; (the path to the socket file)
;chmod&＃61;0700 ; socket file mode (default 0700)
;chown&＃61;nobody:nogroup ; socket file uid:gid owner
;username&＃61;user ; (default is no username (open server))
;password&＃61;123 ; (default is no password (open server));[inet_http_server] ; inet (TCP) server disabled by default
;port&＃61;127.0.0.1:9001 ; (ip_address:port specifier, *:port for all iface)
;username&＃61;user ; (default is no username (open server))
;password&＃61;123 ; (default is no password (open server))[supervisord]
logfile&＃61;/tmp/supervisord.log ; (main log file;default $CWD/supervisord.log)
logfile_maxbytes&＃61;50MB ; (max main logfile bytes b4 rotation;default 50MB)
logfile_backups&＃61;10 ; (num of main logfile rotation backups;default 10)
loglevel&＃61;info ; (log level;default info; others: debug,warn,trace)
pidfile&＃61;/tmp/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
nodaemon&＃61;false ; (start in foreground if true;default false)
minfds&＃61;1024 ; (min. avail startup file descriptors;default 1024)
minprocs&＃61;200 ; (min. avail process descriptors;default 200)
;umask&＃61;022 ; (process file creation umask;default 022)
;user&＃61;chrism ; (default is current user, required if root)
;identifier&＃61;supervisor ; (supervisord identifier, default is &＃39;supervisor&＃39;)
;directory&＃61;/tmp ; (default is not to cd during start)
;nocleanup&＃61;true ; (don&＃39;t clean up tempfiles at start;default false)
;childlogdir&＃61;/tmp ; (&＃39;AUTO&＃39; child log dir, default $TEMP)
;environment&＃61;KEY&＃61;"value" ; (key value pairs to add to environment)
;strip_ansi&＃61;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 &＃61; supervisor.rpcinterface:make_main_rpcinterface[supervisorctl]
serverurl&＃61;unix:///tmp/supervisor.sock ; use a unix:// URL for a unix socket
;serverurl&＃61;http://127.0.0.1:9001 ; use an http:// url to specify an inet socket
;username&＃61;chris ; should be same as http_username if set
;password&＃61;123 ; should be same as http_password if set
;prompt&＃61;mysupervisor ; cmd line prompt (default "supervisor")
;history_file&＃61;~/.sc_history ; use readline history if available; The below sample program section shows all possible program subsection values,
; create one or more &＃39;real&＃39; program: sections to be able to control them under
; supervisor.;[program:theprogramname]
;command&＃61;/bin/cat ; the program (relative uses PATH, can take args)
;process_name&＃61;%(program_name)s ; process_name expr (default %(program_name)s)
;numprocs&＃61;1 ; number of processes copies to start (def 1)
;directory&＃61;/tmp ; directory to cwd to before exec (def no cwd)
;umask&＃61;022 ; umask for process (default None)
;priority&＃61;999 ; the relative start priority (default 999)
;autostart&＃61;true ; start at supervisord start (default: true)
;startsecs&＃61;1 ; # of secs prog must stay up to be running (def. 1)
;startretries&＃61;3 ; max # of serial start failures when starting (default 3)
;autorestart&＃61;unexpected ; when to restart if exited after running (def: unexpected)
;exitcodes&＃61;0,2 ; &＃39;expected&＃39; exit codes used with autorestart (default 0,2)
;stopsignal&＃61;QUIT ; signal used to kill process (default TERM)
;stopwaitsecs&＃61;10 ; max num secs to wait b4 SIGKILL (default 10)
;stopasgroup&＃61;false ; send stop signal to the UNIX process group (default false)
;killasgroup&＃61;false ; SIGKILL the UNIX process group (def false)
;user&＃61;chrism ; setuid to this UNIX account to run the program
;redirect_stderr&＃61;true ; redirect proc stderr to stdout (default false)
;stdout_logfile&＃61;/a/path ; stdout log path, NONE for none; default AUTO
;stdout_logfile_maxbytes&＃61;1MB ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups&＃61;10 ; # of stdout logfile backups (default 10)
;stdout_capture_maxbytes&＃61;1MB ; number of bytes in &＃39;capturemode&＃39; (default 0)
;stdout_events_enabled&＃61;false ; emit events on stdout writes (default false)
;stderr_logfile&＃61;/a/path ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes&＃61;1MB ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups&＃61;10 ; # of stderr logfile backups (default 10)
;stderr_capture_maxbytes&＃61;1MB ; number of bytes in &＃39;capturemode&＃39; (default 0)
;stderr_events_enabled&＃61;false ; emit events on stderr writes (default false)
;environment&＃61;A&＃61;"1",B&＃61;"2" ; process environment additions (def no adds)
;serverurl&＃61;AUTO ; override serverurl computation (childutils); The below sample eventlistener section shows all possible
; eventlistener subsection values, create one or more &＃39;real&＃39;
; eventlistener: sections to be able to handle event notifications
; sent by supervisor.;[eventlistener:theeventlistenername]
;command&＃61;/bin/eventlistener ; the program (relative uses PATH, can take args)
;process_name&＃61;%(program_name)s ; process_name expr (default %(program_name)s)
;numprocs&＃61;1 ; number of processes copies to start (def 1)
;events&＃61;EVENT ; event notif. types to subscribe to (req&＃39;d)
;buffer_size&＃61;10 ; event buffer queue size (default 10)
;directory&＃61;/tmp ; directory to cwd to before exec (def no cwd)
;umask&＃61;022 ; umask for process (default None)
;priority&＃61;-1 ; the relative start priority (default -1)
;autostart&＃61;true ; start at supervisord start (default: true)
;startsecs&＃61;1 ; # of secs prog must stay up to be running (def. 1)
;startretries&＃61;3 ; max # of serial start failures when starting (default 3)
;autorestart&＃61;unexpected ; autorestart if exited after running (def: unexpected)
;exitcodes&＃61;0,2 ; &＃39;expected&＃39; exit codes used with autorestart (default 0,2)
;stopsignal&＃61;QUIT ; signal used to kill process (default TERM)
;stopwaitsecs&＃61;10 ; max num secs to wait b4 SIGKILL (default 10)
;stopasgroup&＃61;false ; send stop signal to the UNIX process group (default false)
;killasgroup&＃61;false ; SIGKILL the UNIX process group (def false)
;user&＃61;chrism ; setuid to this UNIX account to run the program
;redirect_stderr&＃61;false ; redirect_stderr&＃61;true is not allowed for eventlisteners
;stdout_logfile&＃61;/a/path ; stdout log path, NONE for none; default AUTO
;stdout_logfile_maxbytes&＃61;1MB ; max # logfile bytes b4 rotation (default 50MB)
;stdout_logfile_backups&＃61;10 ; # of stdout logfile backups (default 10)
;stdout_events_enabled&＃61;false ; emit events on stdout writes (default false)
;stderr_logfile&＃61;/a/path ; stderr log path, NONE for none; default AUTO
;stderr_logfile_maxbytes&＃61;1MB ; max # logfile bytes b4 rotation (default 50MB)
;stderr_logfile_backups&＃61;10 ; # of stderr logfile backups (default 10)
;stderr_events_enabled&＃61;false ; emit events on stderr writes (default false)
;environment&＃61;A&＃61;"1",B&＃61;"2" ; process environment additions
;serverurl&＃61;AUTO ; override serverurl computation (childutils); The below sample group section shows all possible group values,
; create one or more &＃39;real&＃39; group: sections to create "heterogeneous"
; process groups.;[group:thegroupname]
;programs&＃61;progname1,progname2 ; each refers to &＃39;x&＃39; in [program:x] definitions
;priority&＃61;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 &＃61; /etc/supervisord.d/*.conf

方式一&＃xff1a;
监控nginx:
[root&＃64;docker etc]# cat /etc/supervisord.d/nginx.conf
[program:nginx]
command&＃61;nginx -g "daemon off;"
user&＃61;root
stdout_logfile&＃61;/tmp/nginx.log
autostart&＃61;true
autorestart&＃61;true
startsecs&＃61;5
stopasgroup&＃61;true
ikillasgroup&＃61;true
startretries&＃61;1
redirect_stderr&＃61;true

监听php:
[root&＃64;docker etc]# cat /etc/supervisord.d/php.conf
[program:php-fpm]
command&＃61;php-fpm
user&＃61;root
stdout_logfile&＃61;/tmp/php-fpm.log
autostart&＃61;true
autorestart&＃61;true
startsecs&＃61;10
stopasgroup&＃61;true
ikillasgroup&＃61;true
startretries&＃61;1
redirect_stderr&＃61;true

1、启动服务&＃xff1a;/usr/bin/python /usr/bin/supervisord -c /etc/supervisord.conf
2、若是后续更改了配置文件&＃xff1a;supervisorctl update 或者supervisorctl reload 即可

验证&＃xff1a;

方式二&＃xff1a;写脚本监听

[root&＃64;docker shell]# cat check_nginx.sh

#!/bin/bash
#日志文件
logfile&＃61;"/data/logs/nginx.log"
#检测本机nginx_php服务是否停止
check_nginx(){local nginxstat&＃61;&＃96;netstat -nutlp| grep "0.0.0.0:80" | wc -l&＃96;if [ ${nginxstat} -ne 1 ];thenecho "&＃96;date&＃96;" >> ${logfile}echo "nginx服务已停止" >> ${logfile}echo "nginx服务开始前台启动" >> ${logfile}nginx -g "daemon off;"if [ $? -eq 0 ];thenecho "nginx服务已启动" >> ${logfile}elseecho "nginx服务启动失败" >> ${logfile}fifi
}while :
docheck_nginxsleep 10
done

[root&＃64;docker shell]# cat check_php.sh

#!/bin/bash
#日志文件
logfile&＃61;"/data/logs/php-fpm.log"
#检测本机php-fpm服务是否停止check_php(){local phpstat&＃61;&＃96;netstat -nutlp| grep "127.0.0.1:9000" | wc -l&＃96;if [ "$phpstat" -ne 1 ];thenecho "&＃96;date&＃96;" >> ${logfile}echo "php-fpm服务已停止" >> ${logfile}echo "php-fpm服务开始前台启动" >> ${logfile}php-fpmif [ $? -eq 0 ];thenecho "php-fpm服务已启动" >> ${logfile}elseecho "php-fpm服务启动失败" >> ${logfile}fifi
}while :
docheck_phpsleep 10
done

1、更新配置文件
supervisorctl reload

2、验证

修改了nginx/php-fpm配置文件&＃xff0c;需要重新加载
1、nginx -s reload
2、pkill php-fpm 等10s&＃xff0c;再查看php-fpm有无启动即可

常用命令

supervisorctl 是 supervisord的命令行客户端工具&＃xff1a;supervisorctl status&＃xff1a;查看所有进程的状态
supervisorctl stop es&＃xff1a;停止es
supervisorctl start es&＃xff1a;启动es
supervisorctl restart es: 重启es
supervisorctl update &＃xff1a;配置文件修改后可以使用该命令加载新的配置
supervisorctl reload: 重新启动配置中的所有程序