LVS + KeepAlived实现高可用负载均衡

上文已经介绍了lvs和keepalived的基本概念和用法,下面直接做lvs和keepalived来实现高可用负载均衡

配置:

主机名 ip 系统 用途
client 172.16.147.1 mac 客户端
lvs-keepalived-master 172.16.147.154 centos7.5 分发器
lvs-keepalived-slave 172.16.147.155 centos7.5 分发器备
test-nginx1 172.16.147.153 centos7.5 web1
test-nginx2 172.16.147.156 centos7.5 web2
vip
  1. 主备调度器安装软件

    [root@lvs-keepalived-master ~]# yum -y install ipvsadm keepalived
    [root@lvs-keepalived-slave ~]# yum -y install ipvsadm keepalived
    2. Keepalived
    lvs-master
    [root@lvs-keepalived-master ~]# vim /etc/keepalived/keepalived.conf
    ! Configuration File for keepalived

    global_defs {
    router_id lvs-keepalived-master #辅助改为lvs-backup
    }

    vrrp_instance VI_1 {
    state MASTER
    interface ens33 #VIP绑定接口
    virtual_router_id 80 #VRID 同一组集群,主备一致
    priority 100 #本节点优先级,辅助改为50
    advert_int 1 #检查间隔,默认为1s
    authentication {
    auth_type PASS
    auth_pass 1111
    }
    virtual_ipaddress {
    172.16.147.101/24 # 可以写多个vip
    }
    }

    virtual_server 172.16.147.101 80 { #LVS配置
    delay_loop 3
    lb_algo rr #LVS调度算法
    lb_kind DR #LVS集群模式(路由模式)
    net_mask 255.255.255.0
    protocol TCP #健康检查使用的协议
    real_server 172.16.147.153 80 {
    weight 1
    inhibit_on_failure #当该节点失败时,把权重设置为0,而不是从IPVS中删除
    TCP_CHECK { #健康检查
    connect_port 80 #检查的端口
    connect_timeout 3 #连接超时的时间
    }
    }
    real_server 172.16.147.156 80 {
    weight 1
    inhibit_on_failure
    TCP_CHECK {
    connect_timeout 3
    connect_port 80
    }
    }
    }

  2. 备用机安装和配置

    [root@lvs-keepalived-slave ~]# vim /etc/keepalived/keepalived.conf
    ! Configuration File for keepalived

    global_defs {
    router_id lvs-keepalived-slave
    }

    vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    nopreempt #不抢占资源
    virtual_router_id 80
    priority 50
    advert_int 1
    authentication {
    auth_type PASS
    auth_pass 1111
    }
    virtual_ipaddress {
    172.16.147.101/24
    }
    }
    virtual_server 172.16.147.101 80 {
    delay_loop 3
    lb_algo rr
    lb_kind DR
    net_mask 255.255.255.0
    protocol TCP
    real_server 172.16.147.153 80 {
    weight 1
    inhibit_on_failure
    TCP_CHECK {
    connect_port 80
    connect_timeout 3
    }
    }
    real_server 172.16.147.156 80 {
    weight 1
    inhibit_on_failure
    TCP_CHECK {
    connect_timeout 3
    connect_port 80
    }
    }
    }

  3. 启动KeepAlived

    [root@lvs-keepalived-master ~]# systemctl start keepalived
    [root@lvs-keepalived-master ~]# systemctl enable keepalived

    [root@lvs-keepalived-master ~]# ipvsadm -Ln
    IP Virtual Server version 1.2.1 (size=4096)
    Prot LocalAddress:Port Scheduler Flags
    -> RemoteAddress:Port Forward Weight ActiveConn InActConn
    TCP 172.16.147.101:80 rr persistent 20
    -> 172.16.147.153:80 Route 1 0 0
    -> 172.16.147.156:80 Route 0 0 0

  4. 所有RS配置(nginx1,nginx2)

    [root@test-nginx1 ~]# yum install -y nginx
    [root@test-nginx2 ~]# yum install -y nginx
    [root@test-nginx1 ~]# echo "ip addr add dev lo 172.16.147.101/32" >> /etc/rc.local
    [root@test-nginx1 ~]# echo "net.ipv4.conf.all.arp_ignore = 1" >> /etc/sysctl.conf
    [root@test-nginx1 ~]# echo "net.ipv4.conf.all.arp_announce = 2" >> /etc/sysctl.conf
    [root@test-nginx1 ~]# sysctl -p
    [root@test-nginx1 ~]# echo "web1..." >> /usr/share/nginx/html/index.html
    [root@test-nginx1 ~]# systemctl start nginx
    [root@test-nginx1 ~]# chmod +x /etc/rc.local

上述步骤实现了两台机器的高可用并进行172.16.147.156和172.16.147.153的负载均衡

相关推荐
藥瓿亭43 分钟前
K8S认证|CKS题库+答案| 9. 网络策略 NetworkPolicy
linux·运维·docker·云原生·容器·kubernetes·cks
liuzhenghua661 小时前
Python任务调度模型
java·运维·python
黎相思1 小时前
应用层自定义协议与序列化
运维·服务器·网络
测试开发Kevin2 小时前
详解Jenkins Pipeline 中git 命令的使用方法
运维·jenkins
什么半岛铁盒2 小时前
Linux线程与进程关系及底层实现
java·linux·运维
langmeng1103 小时前
使用docker在3台服务器上搭建基于版本redis 6.x的一主两从模式
运维·redis·docker·容器·集群
jllllyuz3 小时前
如何为服务器生成TLS证书
运维·服务器·数据库
简朴-ocean3 小时前
如何删除linux空的文件夹
linux·运维·服务器
leblancAndSherry4 小时前
Gitlab + Jenkins 实现 CICD
linux·运维·docker·kubernetes·gitlab·jenkins
半桔5 小时前
【Linux手册】探秘系统世界:从用户交互到硬件底层的全链路工作之旅
linux·运维·服务器·面试·centos