沉寂许久，来一个工具——supervisor

Posted 2021-02-16

注意由于supervisor不能监控后台程序,所以command执行的命令都需要放前台执行，比如nginx：command = /usr/local/bin/nginx -g ‘daemon off;’

说下这个工具的好处：
管理你的进程，异常终止自动重启服务进程
机器关机，开机也自动启动服务进程
集中管理，可以批量重启服务进程
安装supervisor

yum install epel-release
yum install -y supervisor

systemctl enable supervisord 开机启动
systemctl start supervisord 启动服务

编辑配置文件/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=0.0.0.0:9001        ; (ip_address:port specifier, *:port for all iface)——修改侦听端口，可以web管理
username=root            ; (default is no username (open server))——web管理用户名
password=123               ; (default is no password (open server))——web管理密码

[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.
[program:redis]     ——添加一个redis启动服务
directory = /root/redis-2.8.17/
command = /root/redis-2.8.17/src/./redis-server /root/redis-2.8.17/redis.conf
autostart = true                                               ;在supervisord启动的时候也启动
startsecs = 5                                                   ;启动5秒后没有异常退出，就当作已经正常启动了
priority=200                           **;优先级   数字越小，越先执行**
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                                                      ;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_logfile = /etc/supervisord.d/redis.log——输出日志

[program:logjar]——启动jar包  注意java 环境变量问题，使用jdk指定目录
directory = /root/
command = /usr/local/java/jdk1.8.0_171/bin/java -jar /root/log-api-imp-0.0.1-SNAPSHOT.jar
autostart = true                                               ;在supervisord启动的时候也启动
startsecs = 5                                                   ;启动5秒后没有异常退出，就当作已经正常启动了
priority=300
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                                                      ;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_logfile = /etc/supervisord.d/logjar.log

[program:zookeeper]
directory = /root/zookeeper/bin/
command = /root/zookeeper/bin/zkServer.sh start-foreground ——加上此参数，然zookeeper到前台运行，否则报错
autostart = true                                               ;在supervisord启动的时候也启动
startsecs = 5                                                   ;启动5秒后没有异常退出，就当作已经正常启动了
priority=100
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                                                      ;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_logfile = /etc/supervisord.d/zookeeper.log
environment=JAVA_HOME="/usr/local/java/jdk1.8.0_171"——指向javahome环境变量

;[include]
;files = /etc/supervisord.d/*.ini

踩坑：
1.注意;分号是注释，一开始配置没搞明白，发现怎么都无法登陆web管理
2.zookeeper 执行需要环境变量
3.使用[include]无法识别配置文件，我把redis、jar、zookeeper三个配置文件拷贝到/etc/supervisord.conf下，才执行成功，启动服务的时候是用的这个配置文件，下图

web管理页面

supervisor也可以使用命令管理
supervisorctl

status #查看程序状态
stop name #关闭name程序
start name #启动name程序
restart name # 重启name程序
reread ＃读取有更新的配置文件，不会启动新添加的程序
update #重启配置文件修改过的程序