Tomcat多实例配置多实例（多进程）

：同一个程序启动多次，分为两种情况:

第一种：一台机器跑多个站点；

第二种：一个机器跑一个站点多个实例，配合负载均衡

1、复制程序文件

[root@localhost ~]# cd /usr/local [root@localhost local]# cp -r tomcat/ tomcat_2 [root@localhost local]# ls bin games java lib64 sbin src tomcat_2 etc include lib libexec share tomcat 修改端口，以启动多实例。多实例之间端口不能一致 [root@localhost local]# sed -i 's#8005#8011#;s#8080#8081#' tomcat/conf/server.xml [root@localhost local]# sed -i 's#8005#8012#;s#8080#8082#' tomcat_2/conf/server.xml [root@localhost local]# sed -i 's#8009#8019#' tomcat/conf/server.xml [root@localhost local]# sed -i 's#8009#8029#' tomcat_2/conf/server.xml [root@localhost local]# diff tomcat/conf/server.xml tomcat_2/conf/server.xml #对比文件不同之处 22c22 < <Server port="8011" shutdown="SHUTDOWN"> --- > <Server port="8012" shutdown="SHUTDOWN"> 67c67 < Define a non-SSL/TLS HTTP/1.1 Connector on port 8081 --- > Define a non-SSL/TLS HTTP/1.1 Connector on port 8082 69c69 < <Connector port="8081" protocol="HTTP/1.1" --- > <Connector port="8082" protocol="HTTP/1.1" 75c75 < port="8081" protocol="HTTP/1.1" --- > port="8082" protocol="HTTP/1.1" 115,116c115,116 < <!-- Define an AJP 1.3 Connector on port 8019 --> < <Connector port="8019" protocol="AJP/1.3" redirectPort="8443" /> --- > <!-- Define an AJP 1.3 Connector on port 8029 --> > <Connector port="8029" protocol="AJP/1.3" redirectPort="8443" />

启动tomcat多实例

修改两台tomcat主页头文件信息，便于区分 [root@localhost local]# vim tomcat/webapps/ROOT/index.jsp [root@localhost local]# vim tomcat_2/webapps/ROOT/index.jsp 启动配置如下： [root@localhosts local]# cd /usr/local/tomcat/bin/ [root@localhosts bin]# vim start.sh #!/bin/bash #tomcat export CATALINA_BASE="/usr/local/tomcat" case "$1" in start) $CATALINA_BASE/bin/startup.sh ;; stop) $CATALINA_BASE/bin/shutdown.sh esac [root@localhost bin]# chmod +x start.sh #修改catalina.sh ---添加如下内容 [root@localhost bin]# vim catalina.sh CATALINA_HOME=/usr/local/tomcat #添加的环境变量注意修改 ---------------------------------------------------------- [root@localhost bin]# cd /usr/local/tomcat_2/bin/ [root@localhost bin]# vim start.sh #!/bin/bash #tomcat export CATALINA_BASE="/usr/local/tomcat_2" case "$1" in start) $CATALINA_BASE/bin/startup.sh ;; stop) $CATALINA_BASE/bin/shutdown.sh esac [root@localhost bin]# chmod +x start.sh [root@localhost bin]# vim catalina.sh CATALINA_HOME=/usr/local/tomcat_2 # 如果多实例部署使用JDK版本不同，修改catalina.sh再这里定义java JAVA_HOME= JRE_HOME=

启动: [root@localhost ~]# /usr/local/tomcat/bin/start.sh start [root@localhost ~]# /usr/local/tomcat_2/bin/start.sh start 检查端口查看是否启动:

[root@localhost local]# netstat -lntp | grep java tcp6 0 0 127.0.0.1:8011 :::* LISTEN 1729/java tcp6 0 0 127.0.0.1:8012 :::* LISTEN 1783/java tcp6 0 0 :::8081 :::* LISTEN 1729/java tcp6 0 0 :::8082 :::* LISTEN 1783/java tcp6 0 0 :::8019 :::* LISTEN 1729/java tcp6 0 0 :::8029 :::* LISTEN 1783/java

2、在浏览器访问，进行测试

检查多实例的启动

http://192.168.204.131:8081

http://192.168.204.131:8082

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tomcat反向代理集群

1、负载均衡器说明

#关闭防火墙和selinux

yum安装nginx [root@nginx-proxy ~]# cd /etc/yum.repos.d/ [root@nginx-proxy yum.repos.d]# vim nginx.repo [nginx-stable] name=nginx stable repo baseurl=http://nginx.org/packages/centos/$releasever/$basearch/ gpgcheck=0 enabled=1 [root@nginx-proxy yum.repos.d]# yum install yum-utils -y [root@nginx-proxy yum.repos.d]# yum install nginx -y

2、配置负载均衡器

备份原配置文件并修改

[root@nginx-proxy ~]# cd /etc/nginx/conf.d/ [root@nginx-proxy conf.d]# cp default.conf default.conf.bak [root@nginx-proxy conf.d]# vim default.conf server { listen 80; server_name localhost; access_log /var/log/nginx/proxy.access.log main; location / { proxy_pass http://testweb; proxy_set_header Host $host:$server_port; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } error_page 500 502 503 504 /50x.html; location = /50x.html { root /usr/share/nginx/html; } } 创建upstream配置文件: [root@nginx-proxy conf.d]# vim upstream.conf upstream testweb { server 192.168.204.131:8081 weight=1 max_fails=1 fail_timeout=2s; server 192.168.204.131:8082 weight=1 max_fails=1 fail_timeout=2s; }

启动nginx

[root@nginx-proxy ~]# systemctl start nginx

3、使用命令进行访问测试

使用curl 命令进行测试，tail进行关键字提取

[root@nginx-proxy ~]# curl -s 192.168.204.134 | tail -1 8082 [root@nginx-proxy ~]# curl -s 192.168.204.134 | tail -1 8081

4、在浏览器上进行访问测试

#使用负载均衡器那台的ip进行访问 http://192.168.204.134