keepalived+LVS高可用的負載平衡

 

1.安裝keepalived在兩台調度伺服器上安裝）
vim /etc/yum.repo.d/rhel.repo
[local-cdrom]
name=local from cdrom
baseurl=file:///mnt/
enable=1
gpgcheck=0

yum -y install kernel-devel openssl-devel popt-devel
rpm -ivh /mnt/Packgets/ipvsadm-1.25-9.el6.i686.rpm
tar zxvf keepalived-1.2.2.tar.gz -C /usr/src/
cd /usr/src/keepalived-1.2.2/
./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.32-131.0.15.el6.i686
make &&make install
chkconfig --add keepalived
chkconfig keepalived on
2.配置調度器主：192.168.13.95，備：192.168.13.96，漂移ip：192.168.13.100）web伺服器集區節點1:192.168.13.41、節點2:192.168.13.47）
1）、配置主HA調度伺服器
cd /etc/keepalived/
cp keepalived.conf keepalived.conf.bak
vi /etc/keepalived/keepalived.conf
#################全域配置#################33
global_defs {
    router_id LVS_HA_R1
}
##################高可用HA的設定##############
vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_route_id 1
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123123
            }
    virtual_ipaddress {
        192.168.13.100
        }
}
###################伺服器集區的配置######################
virtual_server 192.168.13.100 80 {
    delay_loop 15
    lb_algo rr
    lb_kind DR
    protocol TCP
    real_server 192.168.13.41 80 {
        weight 1
        TCP_CHECK {
            connect_port 80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 4               
            }   
                    }
    real_server 192.168.13.41 80 {
        weight 1
        TCP_CHECK {
            connect_port 80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 4               
            }   
                    }       
}

modprobe ip_vs
lsmod |grep ip_vs
echo "modprobe ip_vs" >>/etc/rc.local
/etc/init.d/keepalived restart
chkconfig ipvsadm off
ip addr show dev eth0
2）、配置HA從調度伺服器
cd /etc/keepalived/
cp keepalived.conf keepalived.conf.bak
vi /etc/keepalived/keepalived.conf
#################全域配置#################33
global_defs {
    router_id LVS_HA_R2
}
##################高可用HA的設定##############
vrrp_instance VI_1 {
    state SLAVE
    interface eth0
    virtual_route_id 1
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123123
            }
    virtual_ipaddress {
        192.168.13.100
        }
}
###################伺服器集區的配置######################
virtual_server 192.168.13.100 80 {
    delay_loop 15
    lb_algo rr
    lb_kind DR
    protocol TCP
    real_server 192.168.13.41 80 {
        weight 1
        TCP_CHECK {
            connect_port 80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 4               
            }   
                    }
    real_server 192.168.13.47 80 {
        weight 1
        TCP_CHECK {
            connect_port 80
            connect_timeout 3
            nb_get_retry 3
            delay_before_retry 4               
            }   
                    }       
}

modprobe ip_vs
lsmod |grep ip_vs
echo "modprobe ip_vs" >>/etc/rc.local
/etc/init.d/keepalived restart
chkconfig ipvsadm off
ip addr show dev eth0
######設定防火牆和selinux此處為測試）#########
iptables -F
setenforce 0

3.配置Web節點伺服器DR工作模式的配置，分別在節點伺服器上做如下設定）
cd /etc/sysconfig/network-script/
cp ifcfg-lo ifcfg-lo:0
vi ifcfg-lo:0
DEVICE=lo:0
IPADDR=192.168.13.100
NETMASK=255.255.255.255
ONBOOT=yes

echo "route add -host 192.168.13.100 dev lo:0" >>/etc/rc.local
route add -host 192.168.13.100 dev lo:0
ip addr show dev lo

vi /etc/sysctl.conf
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

sysctl -p
yum install -y httpd
vi /var/www/html/index.html
test page!!!!

/etc/init.d/httpd start
chkconfig httpd on
iptables -F
setenforce 0

4.測試lvs+Keepalived高可用叢集
在客戶機瀏覽器訪問192.168.13.100，調度伺服器可用壞一個，節點伺服器至少要有一個是好的。
通過/var/log/message記錄檔，跟蹤故障切換過程。使用ipvsadm -Ln查看LVS。