nginx，tomcat，redis，keepalived高可用实现

来源：互联网发布：网络维护要求编辑：程序博客网时间：2024/05/29 16:34

1.安装nginx，tomcat，redis。命令都为tar -zxvf ***，安装redis时，在redis根目录后要加 make 命令。安装keepalived，命令：yum -y keepalived

2.修改nginx的nginx.conf：

upstream nginx {
server 192.168.0.168:8080;
server 192.168.0.168:8090;

check interval=3000 rise=2 fall=5 timeout=1000 type=http;
check_http_send "HEAD / HTTP/1.0\r\n\r\n";
check_http_expect_alive http_2xx http_3xx;
}

server {
listen 80;
server_name localhost;

location / {
proxy_pass http://nginx;
}

location /status {
check_status;
}

error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}

check interval=3000 rise=2 fall=5 timeout=1000 type=http;
check_http_send "HEAD / HTTP/1.0\r\n\r\n";
check_http_expect_alive http_2xx http_3xx;
}

3.把jar包复制到tomcat中的lib文件夹：

commons-pool2-2.4.2.jar

jedis-2.8.0.jar

tomcat-redis-session-manager1.2.jar

修改另一个tomcat的端口号，保证正常启动两个tomcat

在conf目录下修改context.xml文件，在<context>里面加入：

修改tomcat中webapps/ROOT/index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

SessionID:<%=session.getId()%>

</br>

SessionIP:<%=request.getServerName()%>

</br>

<h1>tomcat1</h1>

</html>

4.修改redis的配置文件redis.conf

将bind的127.0.0.1修改为本机地址，否则只能本机访问

5.修改主nginx下/etc/keepalived/keepalived.conf文件

! Configuration File for keepalived

#全局配置
global_defs {
notification_email { #指定keepalived在发生切换时需要发送email到的对象，一行一个
XXX@XXX.com
}
notification_email_from XXX@XXX.com #指定发件人
#smtp_server XXX.smtp.com #指定smtp服务器地址
#smtp_connect_timeout 30 #指定smtp连接超时时间
router_id LVS_DEVEL #运行keepalived机器的一个标识
}

vrrp_instance VI_1 {
state MASTER #标示状态为MASTER 备份机为BACKUP
interface eth0 #设置实例绑定的网卡
virtual_router_id 51 #同一实例下virtual_router_id必须相同
priority 100 #MASTER权重要高于BACKUP 比如BACKUP为99
advert_int 1 #MASTER与BACKUP负载均衡器之间同步检查的时间间隔，单位是秒
authentication { #设置认证
auth_type PASS #主从服务器验证方式
auth_pass 8888
}
virtual_ipaddress { #设置vip
192.168.0.180 #可以多个虚拟IP，换行即可
}
}

6.依次重启即可运行

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