linux CentOS7 keepalived+LVS(DR)搭建部署

news2024/12/25 1:24:27

一、服务器准备

二、操作步骤

1.部署web服务器

2.部署LVS主备调度器

测试

部署NFS共享服务器

一、服务器准备

.准备6台虚拟机，2台做LVS主备调度器，2台做web服务器，1台做存储，1台客户机验证

1.LVS主调度器（master）：192.168.1.12

2.LVS备调度器（backup）：192.168.1.133

3.web1：192.168.1.134

4.web2：192.168.1.135

5.存储（nfs）：192.168.1.138

6.客户机（cli）：192.168.1.139

虚拟ip：192.168.1.222

二、操作步骤

1.部署web服务器

[root@web1 ~] vim /etc/sysctl.conf    # 调整web1与web2的ARP参数
net.ipv4.conf.all.arp_ignore=1 
net.ipv4.conf.all.arp_announce=2 
net.ipv4.conf.default.arp_ignore=1 
net.ipv4.conf.default.arp_announce = 2 
net.ipv4.conf.lo.arp_ignore = 1 
net.ipv4.conf.lo.arp_announce=2
[root@web1 ~] yum -y install httpd     #web1与web2安装 http
[root@web1 ~] echo "skl111" > /var/www/html/index.html    # web1与web2分别写一个index.html用于测试（/var/www/html/ ）httpd的网站根目录
[root@web1 ~]# cd /etc/sysconfig/network-scripts/     
[root@web1 network-scripts] cp ifcfg-lo ifcfg-lo:0     # web1与web2创建虚拟ip
[root@web1 network-scripts] vim ifcfg-lo:0
[root@web1 network-scripts] systemctl restart network
[root@web1 network-scripts] ifconfig 
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.135  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::10ee:1215:db1e:47e5  prefixlen 64  scopeid 0x20<link>
        inet6 fe80::d6d9:dbed:4ad1:b012  prefixlen 64  scopeid 0x20<link>
        inet6 fe80::b938:12f9:f741:d867  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:52:40:87  txqueuelen 1000  (Ethernet)
        RX packets 207440  bytes 24892876 (23.7 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6970  bytes 583107 (569.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo:0: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536          #创建完毕
        inet 192.168.1.222  netmask 255.255.255.255
        loop  txqueuelen 1000  (Local Loopback)
[root@web1 network-scripts] route add -host 192.168.1.222/32 dev lo:0   #web1与web2添加回环路由
[root@web1 network-scripts] systemctl start httpd    #启动web服务

2.部署LVS主备调度器

[root@master ~] vim /etc/sysctl1.conf  #调整master和backup的ARP参数（一致）
[root@backup ~] vim /etc/sysctl1.conf
net.ipv4.conf.all.send_redirects = 0 
net.ipv4.conf.default.send_redirects=0
net.ipv4.conf.ens33.send_redirects = 0          

[root@master ~] yum -y install keepalived ipvsadm  #master和backup安装keepalived ipvsadm
[root@master ~] vim /etc/sysconfig/ipvsadm-config    #配置keepalived master
global_defs {
   router_id LVS_DEVEL1
}
vrrp_instance master {
    state MASTER
    interface ens33
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
    192.168.1.222          #虚拟IP        
    }
}
virtual_server 192.168.1.222 {   #虚拟IP
    delay_loop 6
    lb_algo rr
    lb_kind DR
    #persistence_timeout 50
    protocol TCP
    real_server 192.168.1.134  {   #web1
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
    real_server 192.168.1.135 80 {  #web2
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
[root@backup ~] vim /etc/sysconfig/ipvsadm-config   #配置keepalived backup
global_defs {
   router_id LVS_DEVEL2
}
vrrp_instance backup {
    state BACKUP
    interface ens33
    virtual_router_id 51
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
    192.168.1.222       
    }
}
virtual_server 192.168.1.222 80 {
    delay_loop 6
    lb_algo rr
    lb_kind DR
    #persistence_timeout 50
    protocol TCP
    real_server 192.168.1.134 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
    real_server 192.168.1.135 80 {
        weight 1
        HTTP_GET {
            url {
              path /
            }
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}

启动master和backup的keepalived与ipvsadm


[root@master ~] systemctl start keepalived
[root@master ~]# touch /etc/sysconfig/ipvsadm
[root@master ~] systemctl start ipvsadm.service 
[root@master ~] modprobe ip_vs    #master和backup加载ip_vs模块
[root@master ~] ipvsadm -ln     #查看lvs节点状态
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.1.222:80 rr
  -> 192.168.1.134:80             Route   1      0          0         
  -> 192.168.1.135:80             Route   1      0          0

测试

[root@master ~]# curl 192.168.1.222
web2
[root@master ~]# curl 192.168.1.222
web1

[root@master ~]# systemctl stop keepalived.service

部署NFS共享服务器

存储配置文件

[root@nfs network-scripts] yum -y install nfs-utils
[root@nfs network-scripts] vim /etc/exports
/data/www/html/ 192.168.1.0/24(rw)
[root@nfs ] mkdir  -p /data/www/html
[root@nfs ] echo "web 1 2" >/data/www/html/index.html
[root@nfs ] systemctl start nfs
[root@master ~] mount 192.168.1.138:/data/www/html /var/www/html/
[root@backup ~] mount 192.168.1.138:/data/www/html /var/www/html/