lvs-keepalived实现高可用
实验环境：ipvsadm-1.26-4.el6.x86_64
system:centos-6.6.x86_64
kernel:2.6.32-504.el6.x86_64
keepalived-1.2.13-4.el6.x86_64
配置DR：
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# sysctl -w net.ipv4.conf.all.send_redirects=0
net.ipv4.conf.all.send_redirects = 0
# sysctl -w net.ipv4.conf.default.send_redirects=0
net.ipv4.conf.default.send_redirects = 0
# sysctl -w net.ipv4.conf.eth2.send_redirects=0
net.ipv4.conf.eth2.send_redirects = 0
# service ipvsadm stop
# ipvsadm -A -t 192.168.150.200:80 -s rr
# ipvsadm -a -t 192.168.150.200:80 -r 192.168.150.129 -g -w 1
# ipvsadm -a -t 192.168.150.200:80 -r 192.168.150.142 -g -w 1
# iptables -I INPUT -p tcp --dport 80 -j ACCEPT
# service ipvsadm save
配置real server:
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# vim /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
# ifconfig lo:0 192.168.150.200/32
# route add -host 192.168.150.200 dev lo:0
# setenforce 0
# yum install httpd
# service httpd start
配置keepalived：
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global_defs {
notification_email {
acassen@firewall.loc
failover@firewall.loc
sysadmin@firewall.loc
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 220.181.12.11
smtp_connect_timeout 30
router_id haproxy_DEVEL
}
vrrp_instance VI_1 {
state MASTER #另一端为SLAVE
interface eth3 #根据自己网卡情况而定
virtual_router_id 51
priority 100 #另一端为80
advert_int 1
authentication {
auth_type PASS
auth_pass 1234
}
virtual_ipaddress {
192.168.150.200/24 dev eth3
}
}
virtual_server 192.168.150.200/24 80 {
delay_loop 6
lb_algo rr
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.150.129 80 {
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
real_server 192.168.150.142 80 {
weight 3
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}
# service keepalived start
检测结果：
查看是否正常调度：
查看MASTER，获得vip：192.168.150.200，及检查后端
查看SLAVE，及检查后端服务：
故障转移：
停掉MASTER的keepalived,查看SLAVE是否自动切换为MASTER
# service keepalived stop
检测后端检查：
停掉其中一台后端httpd
# service hdttp stop
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