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Keepalived+Nginx+Tomcat+Redis搭建高可用服务 Keepalived作用是检测服务器的状态，Nginx的作用是负载均衡，Tomcat提供web应用，redis提供session共享。 一、环境条件 名称 IP 端口 系统 版本 备注 Keepalived+Nginx 192.168.10.176 8080 Centos6.10 Keepalived v1.2.13+nginx/1.18.0 MASTER Keepalived+Nginx 192.168.10.177 8080 Centos6.10 Keepalived v1.2.13+nginx/1.18.0 BACKUP Tomcat+Redis 192.168.10.178 8086/6379 Centos6.10 Tomcat/7.0.53+Redis v3.2.12 Web Server1 Tomcat+Redis 192.168.10.179 8086/6379 Centos6.10 Tomcat/7.0.53+Redis v3.2.12 Web Server2 VIP 192.168.10.110 8080 Centos6.10 虚拟飘移IP 服务器ssh免密码登录配置 ssh-keygen ssh-copy-id -i ~root/.ssh/id_rsa.pub 192.168.10.176 ssh-copy-id -i ~root/.ssh/id_rsa.pub 192.168.10.177 ssh-copy-id -i ~root/.ssh/id_rsa.pub 192.168.10.178 ssh-copy-id -i ~root/.ssh/id_rsa.pub 192.168.10.179 二、Tomcat服务器配置 1.JDK安装 安装jdk、查看jdk版本 [root@server1 ~]# yum -y install java-1.7.0-openjdk [root@server1 ~]# java -version 2.SERVER1服务器配置 Tomcat部署比较简单，修改端口启动可以正常访问，开放WEB端口，修改server.xml如下 vim conf/server.xml # 多个Tomcat在同台服务器上需要修改 <Server port="8005" shutdown="SHUTDOWN"> # 修改访问端口 <Connector port="8086" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> # 多个Tomcat在同台服务器上需要修改 <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /> # 配置Engine节点的路由信息，session复制和负载均衡需要用 # 添加jvmRoute="Tomcat01"、每个tomcat都需要修改 <Engine name="Catalina" defaultHost="localhost" jvmRoute="Tomcat01"> # 去掉Cluster注释 <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/> 在访问的项目index.jsp页面加上以下代码 <% HttpSession session = request.getSession(); %> <%= session.getId() %> 3.SERVER2服务器配置 将配置好的tomcat发送到server2，修改jvmRoute=“Tomcat02” [root@server1 home]# scp -r apache-tomcat-7.0.53 192.168.3.179:/home/ Tomcat没有重启命令，每次修改后还需要关闭再启动，太麻烦，我将关闭和启动整合一下，变成重启，下面是重启脚本，将脚本保存到tomcat/bin/目录，重启直接执行./restart.sh #!/bin/bash # -*- coding: UTF-8 -*- # Filename: restart.sh # Description: 用于Tomcat重新启动 # Author: SERE LOGSDIR=../logs ./shutdown.sh &> /dev/null echo -e "\033[32mINFO: Tomcat close to finish\033[0m" echo -e "\033[32mINFO: Now restart tomcat\033[0m" nohup ./startup.sh &> /dev/null sleep 1 tail -f $LOGSDIR/catalina.out 4.测试web应用 分别启动tomcat进行访问 三、Nginx服务器配置 1.Nginx安装 Nginx yum 源地址： http://nginx.org/packages/centos/ [root@master ~]# yum -y install nginx # nginx -t ：测试配置文件是否有语法错误 [root@master ~]# nginx -v 2.Master服务器配置 Nginx转发配置 [root@master ~]# vim /etc/nginx/conf.d/cluster.conf upstream application { server 192.168.10.178:8086 weight=1; server 192.168.10.179:8086 weight=1; } server { listen 8080; # BACKUP改为：192.168.10.177 server_name 192.168.10.176; location / { root /var/www/html; index index.php index.html index.htm; proxy_pass http://application; } } 测试配置文件是否有语法错误 [root@master ~]# nginx -t [root@master ~]# service nginx restart 测试负载nginx转发web应用 http://192.168.3.176:8080/application/ 3.Backup服务器配置 将nginx转发配置文件发送到backup服务器 [root@master ~]# scp -r /etc/yum.repos.d/nginx.repo 192.168.10.177:/etc/yum.repos.d/ [root@master ~]# scp -r /etc/nginx/conf.d/cluster.conf 192.168.10.177:/etc/nginx/conf.d/ [root@backup ~]# nginx -t [root@backup ~]# service nginx restart 4.测试负载nginx转发web应用 http://192.168.10.177:8080/application/ 四、Redis服务器配置 1.Redis安装 上传jar包到tomcat/lib/目录 [root@server1 ~]# yum -y install redis 下载地址： https://github.com/jcoleman/tomcat-redis-session-manager https://download.csdn.net/download/SERE0211/12527300 找不到私信我 commons-pool2-2.2 jedis-2.5.2 tomcat-redis-session-manager-2.0.0 2.SERVER1服务器配置 将jar发送server2服务器 [root@server1 lib]# scp -r commons-pool2-2.2.jar jedis-2.5.2.jar tomcat-redis-session-manager-2.0.0.jar 192.168.10.179:/home/tomcat/lib/ 修改conf/context.xml [root@server1 lib]# vim ../conf/context.xml # 添加以下内容 <WatchedResource>WEB-INF/web.xml</WatchedResource> <WatchedResource>${catalina.base}/conf/web.xml</WatchedResource> <Valve className="com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve" /> <Manager className="com.orangefunction.tomcat.redissessions.RedisSessionManager" host="localhost" port="6379" database="0" maxInactiveInterval="60"/> # 一般是从23行开始添加 修改完成重启 [root@server1 ~]# service redis restart 3.SERVER2服务器配置 将context.xml发送server2服务器 [root@server1 bin]# scp ../conf/context.xml 192.168.10.179:/home/apache-tomcat-7.0.53/conf/ # 重启tomcat，redis也需要启动，否则访问报错 [root@server2 ~]# service redis restart 五、Keepalived服务器配置 1.Keepalived安装 [root@master ~]# yum -y install keepalived 2.Master服务器配置 [root@master ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { router_id hostname #机器标识 } vrrp_instance VI_1 { state MASTER #主备状态 interface eth0 #监听网卡 virtual_router_id 51 #虚拟路由id mcast_src_ip 192.168.10.176 #本机IP地址 priority 100 #权重 nopreempt #设置不抢占 advert_int 1 #同步检查时间设置 authentication { #认证配置 auth_type PASS #认证方式 auth_pass 1111 #认证密码 } track_script { chk_nginx #执行Nginx监控的服务# } virtual_ipaddress { #虚拟IP 192.168.10.110 #虚拟IP池MASTER&&BACKUP, 两个设置必须一样，虚拟ip，可以定义多个 } } 将master配置好的keepalived.conf发送到backup服务器 [root@master ~] service keepalived restart [root@master ~] scp /etc/keepalived/keepalived.conf 192.168.10.177:/etc/keepalived/keepalived.conf 1 2 3.Backup服务器配置 [root@master ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { router_id backup #机器标识 } vrrp_instance VI_1 { state MASTER #主备状态 interface eth0 #监听网卡 virtual_router_id 51 #虚拟路由id mcast_src_ip 192.168.10.177 #本机IP地址 priority 100 #权重 nopreempt #设置不抢占 advert_int 1 #同步检查时间设置 authentication { #认证配置 auth_type PASS #认证方式 auth_pass 1111 #认证密码 } track_script { chk_nginx #执行Nginx监控的服务# } virtual_ipaddress { #虚拟IP 192.168.10.110 #虚拟IP池MASTER&&BACKUP, 两个设置必须一样，虚拟ip，可以定义多个 } } # 我将（# priority 100）master和backup设置的是一样的，当一个节点故障，另个节点自动变成主节点 4.测试高可用服务 http://192.168.10.110:8080/application 常用命令： 查看本地IP地址：ip addr 五.参考文档 nginx官网： https://nginx.org/ redis官网： https://redis.io/ keepalived官网： https://www.keepalived.org/ (责任编辑：IT) |