架构图
环境说明
- 所有主机基于centos 6.5
- 后端主机:ha111 IP: 192.168.61.139 安装tomcat
- 后端主机:ha222 IP: 192.168.61.140 安装tomcat
- 负载均衡调度主机：rs1 IP: 192.168.61.131 安装nginx
ha111主机配置
1. jdk安装，可以用sun或openjdk,这里用sun的
- 下载地址，下载linuxx64 rpm安装包即可
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
- 安装
rpm -ivh jdk-8u65-linux-x64.rpm
- 环境变量设置
vim /etc/profile.d/java.sh
export JAVA_HOME=/usr/java/latest
export PATH=$JAVA_HOME/bin:$PATH
- 生效
source /etc/profile.d/java.sh
2.tomcat 安装
- 下载地址，这里用8.0的，apache-tomcat-8.0.28.tar.gz
http://tomcat.apache.org/download-80.cgi
- 安装
tar xvzf apache-tomcat-8.0.28.tar.gz -C /usr/local/
ln -sv /usr/local/apache-tomcat-8.0.28/ /usr/local/tomcat
- 环境变量设置
vim /etc/profile.d/tomcat.sh
export CATALINA_HOME=/usr/local/tomcat
export PATH=$CATALINA_HOME/bin:$PATH
- 立即生效
source /etc/profile.d/tomcat.sh
- 添加系统服务
vim /etc/init.d/tomcat
#!/bin/sh
# Tomcat init scriptfor Linux.
#
# chkconfig: 2345 96 14
# description: TheApache Tomcat servlet/JSP container.
# JAVA_OPTS=‘-Xms64m-Xmx128m‘
JAVA_HOME=/usr/java/latest #注意这些路径是否正确
CATALINA_HOME=/usr/local/tomcat #注意这些路径是否正确
exportJAVA_HOME CATALINA_HOME #这句不加也可以，前面环境都设置好了就行case $1 in
start)
exec $CATALINA_HOME/bin/catalina.sh start ;;
stop)
exec $CATALINA_HOME/bin/catalina.sh stop;;
restart)
$CATALINA_HOME/bin/catalina.sh stop
sleep 2
exec $CATALINA_HOME/bin/catalina.sh start ;;
*)
echo "Usage: `basename $0`{start|stop|restart}"
exit 1
;;
esac
- 修改默认监听的8080端口为80
vim /usr/local/tomcat/conf/server.xml
<Connector port="8080" protocol="HTTP/1.1" 改为
<Connector port="80" protocol="HTTP/1.1"chmod +x /etc/init.d/tomcat
chkconfig --add tomcat
service tomcat start 启动服务 - 建立测试站点
cd /usr/local/tomcat/webapp
mkdir -pv testapp/{WEB-INF,classes,META-INF,lib}
- 建立首页
vim testapp/index.jsp
<%@ page language="java" %>
<html>
<head><title>TomcatA</title></head>
<body>
<h1><fontcolor="red">Tomcat.ha111</font></h1>
<tableborder="1">
<tr>
<td>Session ID</td>
<%session.setAttribute("dx.com","dx.com"); %>
<td><%= session.getId()%></td>
</tr>
<tr>
<td>Created on</td>
<td><%=session.getCreationTime() %></td>
</tr>
</table>
</body>
</html> - 测试curl http://localhost:8080/testapp/index.jsp
3. ha222主机配置和ha111一样
4 .nginx负载均衡调度器rs1配置
- 安装包
下载最新稳定版nginx-1.8.0
http://nginx.org/en/download.html
- 安装依赖
yum -y install pcre-devel openssl-devel
tar xvzf nginx-1.8.0.tar -C /root/
- sticky模块
wget https://nginx-sticky-module.googlecode.com/files/nginx-sticky-module-1.1.tar.gz
tar xvzf nginx-sticky-module-1.1.tar.gz -C /root/
- 解压后编译安装
- ./configure --prefix=/usr/local/nginx--conf-path=/etc/nginx/nginx.conf --user=nginx --group=nginx--error-log-path=/var/log/nginx/error.log--http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx/nginx.pid--lock-path=/var/lock/nginx.lock --with-http_ssl_module--with-http_stub_status_module --with-http_gzip_static_module--with-http_flv_module --with-http_mp4_module--http-client-body-temp-path=/var/tmp/nginx/client--http-proxy-temp-path=/var/tmp/nginx/proxy--http-fastcgi-temp-path=/var/tmp/nginx/fastcgi--http-uwsgi-temp-path=/var/tmp/nginx/uwsgi --add-module=../nginx-sticky-module-1.1
make && make install
注意：如果需要开启sticky session功能，需要加上上面红色这句，nginx-sticky-module-1.1为模块文件所在位置，这里nginx的源文件与sticky模块源文件在同一目录创建上面指定的目录，不然启动时会报错
mkdir -pv /var/tmp/nginx/{client,proxy,fastcgi,uwsgi}
- 修改配置文件
vim /etc/nginx/nginx.conf
添加下面内容：
upstream testapp {
sticky; #开启 session sticky
server 192.168.61.139:80;
server 192.168.61.140:80;
}server {
listen 80;
server_name 192.168.61.131;
location / {
proxy_pass http://testapp;
index index.jsp index.html index.htm;
}error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
}
至此全部配置完成，只要访问http://192.168.61.131/testapp/index.jsp即可实现基于cookie的session sticky lnmt