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這期內(nèi)容當(dāng)中小編將會給大家?guī)碛嘘P(guān)LVS-DR群集模式+keepalived怎么實現(xiàn)高可用,文章內(nèi)容豐富且以專業(yè)的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
條件:五臺虛擬機:
(主)負(fù)載調(diào)度器:
創(chuàng)建映射端口(VIP)
優(yōu)化環(huán)境:(/etc/sysctl.conf)
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.eth0.send_redirects = 0
sysctl -p
加載ip_vs模塊
modprobe ip_vs
查看ipvs
cat /proc/net/ip_vs
安裝IPVS
yum install -y ipvsadm
查看版本:
ipvsadm -v
設(shè)置負(fù)載調(diào)度器設(shè)置模式
ipvsadm -A -t 192.168.115.100:80 -s rr
ipvsadm -a -t 192.168.115.100:80 -r 192.168.115.173:80 -g(173和176分別指向兩個RS)
ipvsadm -a -t 192.168.115.100:80 -r 192.168.115.176:80 -g
查看:
ipvsadm -Ln
安裝keepalived
yum install -y gcc* kernel-devel openssl-devel popt-devel ipvsadm
tar -xvf keepalived-1.2.7.tar.gz
./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
配置keepalived文件:
啟動服務(wù):
service keepalived start
chkconfig keepalived on
共享資源服務(wù)器:
搭建NFS給RS掛在使用
RS1:
安裝Apache服務(wù)
配置本地回環(huán)端口映射:
設(shè)置一條路由:
route add -host 192.168.115.100 dev lo:0
優(yōu)化環(huán)境:
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
RS2:
安裝Apache服務(wù),將內(nèi)容從NFS服務(wù)器上面掛在過來:
mount -t nfs 192.168.115.177:/share /var/www/html
設(shè)置映射網(wǎng)卡:
優(yōu)化環(huán)境:
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.default.arp_announce = 2
net.ipv4.conf.default.arp_ignore = 1
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
設(shè)置路由:
設(shè)置一條路由:
route add -host 192.168.115.100 dev lo:0
測試機訪問:
每刷新一次,內(nèi)容一次輪詢:
下面搭建基于keepalived的LVS-DR
增加一個虛擬機作為從負(fù)載調(diào)度器:
加載ip_vs模塊
modprobe ip_vs
查看ipvs
cat /proc/net/ip_vs
安裝IPVS
yum install -y ipvsadm
查看版本:
ipvsadm -v
設(shè)置負(fù)載調(diào)度器設(shè)置模式
ipvsadm -A -t 192.168.115.100:80 -s rr
ipvsadm -a -t 192.168.115.100:80 -r 192.168.115.173:80 -g(173和176分別指向兩個RS)
ipvsadm -a -t 192.168.115.100:80 -r 192.168.115.176:80 -g
查看:
ipvsadm -Ln
優(yōu)化環(huán)境:
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.eth0.send_redirects = 0
安裝keepalived
yum install -y gcc* kernel-devel openssl-devel popt-devel ipvsadm
tar -xvf keepalived-1.2.7.tar.gz
./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
service keepalived start
chkconfig keepalived on
測試機測試:
從服務(wù)器成功接替工作:實驗成功:
配置文件模板:
! Configuration File for keepalived
global_defs {
router_id LVS_R1
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.115.100
}
}
virtual_server 192.168.115.100 80 {
delay_loop 6
lb_algo rr
lb_kind DR
protocol TCP
real_server 192.168.115.173 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.115.176 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
}
在做從負(fù)載調(diào)度器的時候,因為有兩個網(wǎng)卡公用一個地址,這樣啟動網(wǎng)卡的時候會報錯
解決辦法:
vim /etc/sysconfig/network-scripts/ifup-eth
將圖示內(nèi)容注釋即可
然后再重啟網(wǎng)卡
上述就是小編為大家分享的LVS-DR群集模式+keepalived怎么實現(xiàn)高可用了,如果剛好有類似的疑惑,不妨參照上述分析進(jìn)行理解。如果想知道更多相關(guān)知識,歡迎關(guān)注億速云行業(yè)資訊頻道。
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