负载均衡的综合部署练习（hproxy+keepalived和lvs-DR+keepalived+nginx+Tomcat）-CSDN博客

一、haproxy+keepalived

haproxy 2台

20.0.0.21

20.0.0.22

nginx 2台

20.0.0.23

20.0.0.24

客户机 1台

20.0.0.30

这里没有haproxy不是集群的概念他只是代理服务器。

访问他直接可以直接访问后端服务器

关闭防火墙

安装haproxy和环境

yum install -y pcre-devel bzip2-devel gcc gcc-c++ make

tar zxvf haproxy-1.5.19.tar.gz

cd haproxy-1.5.19/

make TARGET=linux2628 ARCH=x86_64

make install

Haproxy服务器配置:

创建haproxy目录复制haproxy.cfg文件到目录下

mkdir /etc/haproxy

cp /opt/haproxy-1.5.19/examples/haproxy.cfg /etc/haproxy/

vim /etc/haproxy/haproxy.cfg

 timeout http-request 10s

 timeout queue 1m

 timeout connect 10s

 timeout client 1m

 timeout server 1m

 timeout http-keep-alive 10s

 timeout check 10s

listen test 0.0.0.0:80

        option httpchk GET /index.html

        balance roundrobin

        server inst1 20.0.0.23:80 check inter 2000 fall 3 weight 3

        server inst2 20.0.0.24:80 check inter 2000 fall 3 weight 7

haproxy系统服务的添加

cp /opt/haproxy-1.5.19/examples/haproxy.init /etc/init.d/haproxy

chmod 777 /etc/init.d/haproxy

chkconfig --add /etc/init.d/haproxy

cd /etc/init.d

ln -s /usr/local/sbin/haproxy /usr/sbin

软连接一定要是绝对路径

systemctl restart haproxy

下载ipvsadm 和 keepalived

配置keepalived

keepalived不配置指向后端服务器由haproxy指向。keepalived只做主备切换

vim /etc/keepalived

备机scp远程复制keepalived改一下

id要改主备不能一致BACKUP改优先级改

先启动ipvsadm 在 启动keepalived

由于这里keepalived没有配置数据指向而是直接访问后端真实服务器ipvsadm -ln没有策略

vim /etc/sysctl.conf

net.ipv4.ip_forward = 0

net.ipv4.conf.all.send_redirects = 0

net.ipv4.conf.default.send_redirects = 0

net.ipv4.conf.ens33.send_redirects = 0

编写脚本检测haproxy控制keepalived

后端RS

后端RS nginx配置

后端RS启动nginx 改静态页面index.html

关闭nginx的keepalive_timeout

重启nginx

用客户机curl访问

模拟故障把主的haproxy服务停止

ip addr

vip到备用机上去了

客户机访问

故障恢复先启动主的keepalived再启动主的haproxy

ip addr vip回到主上

访问

二、LVS+DR模式+keepalived+nginx+tomcat

主20.0.0.21

备20.0.0.22

静态nginx 120.0.0.23

静态nginx 220.0.0.24

动态tomcat120.0.0.25

动态tomcat220.0.0.26

客户端 1

lvs-DR主备配置

20.0.0.21

20.0.0.22

安装keepalived

更改keepalived配置文件

vim /etc/keepalived/keepalived.conf.bak

ip addr查看vip

systemctl -p

net.ipv4.ip_forward = 0

net.ipv4.conf.all.send_redirects = 0

net.ipv4.conf.default.send_redirects = 0

net.ipv4.conf.ens33.send_redirects = 0

备用调度器远程复制略微修改

scp root@20.0.0.21:/etc/keepalived/keepalived.conf /etc/keepalived/

设置后端nginx

配置静态界面

创建虚拟ip

DEVICE=lo:0

IPADDR=20.0.0.100

NETMASK=255.255.255.255

ONBOOT=yes

重启网卡加入路由

ifup ifcfg-lo:0

route add -host 20.0.0.100 dev lo:0

vim /etc/sysctl.conf

net.ipv4.conf.lo.arp_ignore = 1

net.ipv4.conf.lo.arp_announce = 2

net.ipv4.conf.all.arp_ignore = 1

net.ipv4.conf.all.arp_announce = 2

去nginx里把连接保持关了

配置指向动态页面tomcat

重启nginx

客户机访问20.0.0.100检测静态页面

配置tomcat

解压安装Tomcat

rpm -ivh jdk-8u201-linux-x64.rpm

指定java脚本

vim /etc/profile.d/java.sh

export JAVA_HOME=/usr/java/jdk1.8.0_201-amd64

export CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar

export PATH=$JAVA_HOME/bin:$PATH

source /etc/profile.d/java.sh

检查java版本

java -version

安装Tomcat解压即可

tar -xf apache-tomcat-9.0.16.tar.gz

将软件剪切到local目录下面去

mv apache-tomcat-9.0.16 /usr/local/tomcat

进入/usr/local/tomcat

进入bin目录启动Tomcat

浏览器检验

创建动态页面

先创建test目录 再创建jsp文件

更改server.xml

148自带host删除

最后几行host更改复制进去要看有没有自动换行什么的

<Host name="localhost" appBase="webapps" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false">

        <Context docBase="/usr/local/tomcat/webapps/test" path="" reloadable="true" />

重启Tomcat

客户机访问

模拟故障将主的keepalived停了

vip跑到备上

访问

故障恢复将主的keepalived启动

vip回到主上

访问