supervisor管理集群（多个tomcat）#yyds干货盘点#
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官网：http://www.supervisord.org/
1简介
Supervisor ( http:/lsupervisord.orgL ) CIS架构的进程控制系统,是用Python开发的一个client/server服务，是Linux/Unix系统下的一个进程管理工具，基于linux操作系统的一款服务器管理工具，不支持Windows系统。用以监控服务器的运行，发现问题能立即自动预警及自动重启等功能。
Supervisor类似于monit ,monit和supervisor的一个比较大的差异是supervisor管理的进程必须由supervisor来启动，monit可以管理已经在运行的程序;supervisor还要求管理的程序是非daemon程序，supervisord会帮你把它转daemon程序，因此如果用supervisor来管理nginx的话，必须在nginx的配置文件里添加一行设置daemon offInginx以非
daemon方式启动。
因为Supervisor是Python开发的，安装前先检查一下系统否安装了Python2.4以上版本。下面以Cent0S7，Python2.7版本环境下，介绍Supervisor的安装与配置步聚:
2应用场景
公司服务器众多，项目多以tomcat为主，而且服务器上tomcat节点比较多，此时通过脚本管理tomcat已经非常棘手，就需要一个统一的进程管理工具去统一管理项目。因此选用supervisor来管理I
注意: supervisor只能管理前台进程。
3.安装
安装之前要确定你的虚拟机上是否有Python环境
3.1.安装supervisor
yum -y install supervisor
设置开启自启
systemctl enable supervisord
#常用supervisorctl命令
supervisorctl status
supervisorctl stop tomcat
supervisorctl start tomcat
supervisorctl restart tomcat
supervisorctl reread
supervisorctl update
3.2.通过supervisor管理tomcat,配置jdk环境
tar -zxvf jdk-8u60-linux-x64.tar.gz -C /usr/local/
chown -R root.root /usr/local/jdk1.8.0_60
cat>>/etc/profile<<\\EOF
###jdk环境###
export JAVA_HOME=/usr/local/jdk1.8.0_60
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH
export CLASSPATH=.$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib:$JAVA_HOME/lib/tools.jar
EOF
生效
source /etc/profile
java -version
3.3.安装tomcat
tar zxf apache-tomcat-8.5.29.tar.gz
mkdir -p /opt/app01
cp -a apache-tomcat-8.5.29/* /opt/app01/
#删除没有用的
rm -f NOTICE LICENSE RELEASE-NOTES RUNNING.txt
#启动tomcat
./bin/startup.sh
##查看一下有没有起来
ps -ef | grep java
#关闭tomcat
./bin/shutdown.sh
3.4.创建supervisor管理tomcat的子配置文件
[root@ c7-41 app01]# vim /etc/supervisord.d/app01.ini
[program:app01]
command=/opt/app01/bin/catalina.sh run
environment=JAVA_HOME="/usr/local/jdk1.8.0_60",JAVA_BIN="/usr/local/jdk1.8.0_60/bin"
directory=/opt/app01/bin/
numprocs=1
user = root
autostart = true
autorestart=true
startsecs = 5
3.5.启动supervisor，会把它下面的都给带起来
[root@ c7-41 app01]# systemctl status supervisord.service
● supervisord.service - Process Monitoring and Control Daemon
Loaded: loaded (/usr/lib/systemd/system/supervisord.service; enabled; vendor preset: disabled)
Active: inactive (dead)
[root@ c7-41 app01]# systemctl start supervisord.service
[root@ c7-41 app01]# ps -ef | grep java
root 3839 3838 67 15:19 ? 00:00:05 /usr/local/jdk1.8.0_60/bin/java -Djava.util.logging.config.file=/opt/app01/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dignore.endorsed.dirs= -classpath /opt/app01/bin/bootstrap.jar:/opt/app01/bin/tomcat-juli.jar -Dcatalina.base=/opt/app01 -Dcatalina.home=/opt/app01 -Djava.io.tmpdir=/opt/app01/temp org.apache.catalina.startup.Bootstrap start
root 3887 3380 0 15:19 pts/0 00:00:00 grep --color=auto java
3.6.bash终端管理
[root@ c7-41 app01]# supervisorctl status #命令行模式
app01 RUNNING pid 3839, uptime 0:02:09
[root@ c7-41 app01]# supervisorctl #交互模式
app01 RUNNING pid 3839, uptime 0:13:57
supervisor> help
default commands (type help <topic>):
=====================================
add exit open reload restart start tail
avail fg pid remove shutdown status update
clear maintail quit reread signal stop version
supervisor>
#ctrl+c退出
3.7.常用命令supervisorctl
[root@ c7-41 app01]# supervisorctl status app01
app01 RUNNING pid 3839, uptime 0:15:31
[root@ c7-41 app01]# supervisorctl start app01
app01: ERROR (already started)
supervisorctl stop app01
supervisorctl reload app01
3.8.看一下是否有问题
[root@ c7-41 app01]# curl -I 10.0.0.41:8080
HTTP/1.1 200
Content-Type: text/html;charset=UTF-8
Transfer-Encoding: chunked
Date: Mon, 20 Apr 2020 07:22:28 GMT
进入到主配置文件（ctrl+v可以删除多行，选中就好了）（按一下esc,然后ctrl+c，然后在i，添加完之后按一个esc）把注释去掉
3.9.启动一下
[root@ c7-41 ~]# systemctl restart supervisord
[root@ c7-41 ~]# supervisorctl start app01
app01: ERROR (already started)
[root@ c7-41 ~]# supervisorctl status app01
app01 RUNNING pid 4506, uptime 0:00:14
[root@ c7-41 ~]#
3.10.测试
怎么弄多个tomcat
[root@ c7-41 opt]# cp -a app01 app02
[root@ c7-41 conf]# vim server.xml
[root@ c7-41 conf]# pwd
/opt/app02/conf
修改一下端口号
创建supervisor管理tomcat的子配置文件
[root@ c7-41 app02]# cd /opt/app02/
[root@ c7-41 app02]# cd /etc/supervisord.d/
[root@ c7-41 supervisord.d]# ls
app01.ini
[root@ c7-41 supervisord.d]# cp app01.ini app02.ini
[root@ c7-41 supervisord.d]# vim app02
[root@ c7-41 supervisord.d]# vim app02.ini
[program:app02]
command=/opt/app02/bin/catalina.sh run
environment=JAVA_HOME="/usr/local/jdk1.8.0_60",JAVA_BIN="/usr/local/jdk1.8.0_60/bin"
directory=/opt/app02/bin/
numprocs=1
user = root
autostart = true
autorestart=true
startsecs = 5
更新（添加）启动
页面刷新一下
知识点
传统的将程序放置后台启动：
1
（1）、&放置后台启动；但是一般和nohup（不挂断运行命令）一起用；常用方法；nohup command &
（2）工具类：可以用supervisor等守护进程工具管理
2、
（1）nohup /opt/app01/bin/catalina.sh run & #后台启动
（2）nohup /opt/app01/bin/catalina.sh run #前台启动
3、cat /etc/supervisord.conf（这里面不用修改就是为了让你了解一下）
yum安装的supervisor的主配置文件详解
[root@ c7-41 app01]# cat /etc/supervisord.conf
; Sample supervisor config file.
[unix_http_server] #下面这个是supervisorctl和supervisord主程序通讯使用的
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] #supervisor自带UI界面有关; 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] #supervisord主程序的配置
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#在后台启动 ; (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 ; (dont 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] #supervisorctl命令行（客户端）
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
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