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+---
+title: "Lvs 笔记"
+date: 2019-10-30T12:55:50+08:00
+lastmod: 2019-10-30T12:55:50+08:00
+tags: ["lvs", "负载均衡"]
+categories: ["ha/lb"]
+---
+
+# 环境
+角色 | 地址
+---- | ----
+负载分配服务器 | 192.168.1.209
+tomcat 服务器1 | 192.168.1.207
+tomcat 服务器2 | 192.168.1.208
+VIP | 192.168.1.250
+
+# LVS-DR
+- 配置负载分配服务器(192.168.1.209)
+    ```bash
+    #在与 tomcat 服务器连通的网卡(eth0)上配置虚拟 IP(192.168.1.250)
+    ip addr add 192.168.1.250/32 brd 192.168.1.250 dev eth0
+    ip route add 192.168.1.250 dev eth0
+    #开启转发
+    echo 1 > /proc/sys/net/ipv4/ip_forward
+    #安装 ipvsadm
+    yum install ipvsadm
+    ipvsadm -C
+    ipvsadm -A -t 192.168.1.250:80 -s rr
+    ipvsadm -a -t 192.168.1.250:80 -r 192.168.1.207:80 -g
+    ipvsadm -a -t 192.168.1.250:80 -r 192.168.1.208:80 -g
+    ```
+- 在两台 tomcat 服务器上都做如下配置
+    ```bash
+    #禁用 arp 响应
+    echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
+    echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
+    echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
+    echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
+    #添加虚拟 IP
+    ip addr add 192.168.1.250/32 brd 192.168.1.250 dev lo
+    ip route add 192.168.1.250 dev lo
+    #在个人浏览器中访问 http://192.168.1.250/webapp/
+    ```
+