Shulou(Shulou.com)06/03 Report--

LVS (DR) + Keepalived server cluster LVS polling server can guarantee normal access to Keepalived highly available servers when a website server is down. It can be guaranteed when LVS is down. Can still work and build server cluster 192.168.4.50LVS+Keepalived VIP 192.168.4.253 192.168.4.53 192.168.4.51 website server 192.168.4.52 [50:53] # yum-y install keepalived ipvsadmvim / etc/keepalived/keepalived.conf vrrp_instance webha {state MASTER/SLAVE backup server interface eth0 network interface priority 150C100 priority authentication {auth_type PASS auth_pass 123456 main, Backup password same} virtual_ipaddress {192.168.4.253 virtual network address}} virtual_server 192.168.4.253 80 {the specified virtual server address is equivalent to ipvsadm-A-t 192.168.4.252 rr 80-s Delay_loop 6 lb_algo rr rr: polling mode lb_kind DR DR: direct route mode nat_mask 255.255.255.0 # persistence_timeout 50 A host access page is fixed to a web server to provide services protocol TCP within 50 seconds Connect_timeout 3 nb_get_retry 3 delay_before_retry 3 real_server 192.168.4.52 80 {Real server address ipvsadm-a-t 192.168.4.252 ipvsadm 80-r 192.168.4.53 delay_before_retry 80 weight 1} real_server 192.168.4.53 80 {weight 1}} # service keepalived start # ip add show | grep 192.168.4.252 # ipvsadm-Ln [51:52] port binds vip address Used to help the server return ifconfig lo:1 192.168.4.253 ifconfig lo:1 32 ifconfig lo:1 echo 1 > / proc/sys/net/ipv4/conf/lo/arp_ignore echo 2 > / proc/sys/net/ipv4/conf/lo/arp_announce echo 1 > / proc/sys/net/ipv4/conf/all/arp_ignore echo 2 > / proc/sys/net/ipv4/conf/all/arp_announce # elinks-- dump http://192.168.4.253

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