1、Supervisor 安装

1）easy_install 安装 supervisor

wget https://pypi.io/packages/source/s/setuptools/setuptools-33.1.1.zip  
unzip setuptools-33.1.1.zip  
cd setuptools-33.1.1  
python setup.py install  
easy_install supervisor

2）pip 安装 supervisor

pip install supervisor 

3）CentOS或Debian/Ubuntu 安装

CentOS：

yum install -y epel-release
yum -y install supervisor

Debian/Ubuntu：

apt-get install supervisor

2、配置Supervisor

1）初始化配置文件

使用echo_supervisord_conf命令生成Supervisor的配置文件。

mkdir /etc/supervisord.d  
echo_supervisord_conf >/etc/supervisord.conf 

2）修改配置文件

配置文件内容比较多，需要修改内容如下，

#修改socket文件的mode，默认是0700  
sed -i 's/;chmod=0700/chmod=0766/g'/etc/supervisord.conf     
#在配置文件最后添加以下两行内容来包含/etc/supervisord目录  
sed -i '$a [include] \  
files =/etc/supervisord.d/*.conf' /etc/supervisord.conf 

内容如下：

; 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 ".

[unix_http_server]
file=/var/run/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=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/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=/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 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:///var/run/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=0,2                 ; '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 (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)
;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)
;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=0,2                 ; '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 (0 means none, 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 (0 means none, 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 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 = /etc/supervisor/conf.d/*.conf

3）添加被管理应用nginx和tomcat配置文件 

 vim /etc/supervisord.d/tomcat.conf  

[program:tomcat-app]#程序唯一名称  
directory=/usr/local/tomcat                             #程序路径  
command=/usr/local/tomcat/bin/catalina.sh run           #运行程序的命令  
autostart=true#是否在supervisord启动后tomcat也启动  
startsecs=10#启动10秒后没有异常退出，就表示进程正常启动了，默认为1秒  
autorestart=true#程序退出后自动重启,可选值：[unexpected,true,false]，默认为unexpected，表示进程意外杀死后才重启；意思为如果不是supervisord来关闭的该进程则认为不正当关闭，supervisord会再次把该进程给启动起来，只能使用该supervisorctl来进行关闭、启动、重启操作  
startretries=3#启动失败自动重试次数，默认是3  
user=root                                               #用哪个用户启动进程，默认是root  
priority=999#进程启动优先级，默认999，假如Supervisord需要管理多个进程，那么值小的优先启动 
stopsignal=INT  
redirect_stderr=true#把stderr重定向到stdout标准输出，默认false  
stdout_logfile_maxbytes=200MB#stdout标准输出日志文件大小，日志文件大小到200M后则进行切割，切割后的日志文件会标示为catalina.out1,catalina.out2,catalina.out3...，默认50MB 
stdout_logfile_backups =100#stdout标准输出日志文件备份数，保存100个200MB的日志文件，超过100个后老的将被删除，默认为10保存10个 
stdout_logfile=/usr/local/tomcat/logs/catalina.out#标准日志输出位置，如果输出位置不存在则会启动失败  
stopasgroup=false#默认为false,进程被杀死时，是否向这个进程组发送stop信号，包括子进程  
killasgroup=false#默认为false，向进程组发送kill信号，包括子进程 

[program:nginx-app]
user=root
command = /bin/nginx -g 'daemon off;'
stderr_logfile=/tmp/nginxapp.err.log
stdout_logfile=/tmp/nginxapp.out.log

注意：通过 fork/exec 的方式把这些被管理的进程当作supervisor的子进程来启动，如此只要在supervisor的配置文件中，把要管理的进程的可执行文件的路径写进去即可。也实现当子进程挂掉的时候，父进程可以准确获取子进程挂掉的信息的，可以选择是否自己启动和报警。supervisor还提供了一个功能，可以为supervisord或者每个子进程，设置一个非root的user，这个user就可以管理它对应的进程。

3、启动supervisord

使用supervisord管理启动后，当使用/usr/local/tomcat/shutdown.sh或者kill $PID时，supervisord都当是意外关闭，会自动再次把进程启动，除非是使用supervisord命令关闭。

supervisord -c /etc/supervisord.conf  

注意：启动supervisord后，配置文件中设置了 autostart=true 参数，配置的应用也会随之启动。

1）单个程序管理命令

supervisorctl status tomcat-app                            
supervisorctl stop tomcat-app                                 
supervisorctl start tomcat-app                                
supervisorctl restart tomcat-app                             
supervisorctl reoload tomcat-app

注意：tomcat-app是配置文件中名字。

2）所有程序管理命令

supervisorctl stop all                                 
supervisorctl start all                                
supervisorctl restart all                             
supervisorctl reoload all                        

4、配置开机启动

1）添加服务文件

vim /usr/lib/systemd/system/supervisord.service  

添加文件内容如下：

[Unit]  
Description=ProcessMonitoringandControlDaemon  
After=rc-local.service nss-user-lookup.target  
[Service] 
Type=forking  
ExecStart=/usr/bin/supervisord -c /etc/supervisord.conf  
[Install]  
WantedBy=multi-user.target  

2）设置开机启动

systemctl enable supervisord  
systemctl is-enabled supervisord