LVS负载均衡实现双向热备
一、LVS1服务器配置
安装ipvsadm,keepalived
[root@localhost ~]# yum -y install ipvsadm keepalived
配置keepalivedde配置文件
[root@localhost ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 192.168.200.1 smtp_connect_timeout 30 router_id LVS_MASTER vrrp_skip_check_adv_addr vrrp_strict vrrp_garp_interval 0 vrrp_gna_interval 0 } vrrp_instance VI_1 { state MASTER interface eno16777728 virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.200.201 } } virtual_server 192.168.200.201 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 50 protocol TCP real_server 192.168.200.113 80 { weight 1 TCP_CHECK{ connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 192.168.200.11 80 { weight 1 TCP_CHECK{ connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } } ############################################################# vrrp_instance VI_2 { state BACKUP interface eno16777728 virtual_router_id 52 priority 90 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.200.202 } } virtual_server 192.168.200.202 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 50 protocol TCP real_server 192.168.200.113 80 { weight 1 TCP_CHECK{ connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 192.168.200.11 80 { weight 1 TCP_CHECK{ connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } }
关闭防火墙，安全策略，启动服务并查看
#关闭防火墙，安全策略 [root@localhost ~]# systemctl stop firewalld [root@localhost ~]# iptables -F [root@localhost ~]# setenforce 0 #启动keepalived服务 [root@localhost ~]# systemctl start keepalived #查看VIP [root@localhost ~]# ip a | grep inet inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host inet 192.168.200.111/24 brd 192.168.200.255 scope global eno16777728 inet 192.168.200.201/32 scope global eno16777728 inet6 fe80::20c:29ff:fef0:4297/64 scope link #查看策略 [root@localhost ~]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.200.201:80 rr persistent 50 #发现服务器192.168.200.11有问题 -> 192.168.200.113:80 Route 1 0 0 TCP 192.168.200.202:80 rr persistent 50 -> 192.168.200.113:80 Route 1 0 0
二、LVS2服务器配置
安装ipvsadm,keepalived
[root@localhost ~]# yum -y install ipvsadm keepalived
配置keepalivedde配置文件
[root@localhost ~]# vim /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 192.168.200.1 smtp_connect_timeout 30 router_id LVS_MASTER vrrp_skip_check_adv_addr vrrp_strict vrrp_garp_interval 0 vrrp_gna_interval 0 } vrrp_instance VI_1 { state BACKUP interface eno16777728 virtual_router_id 51 priority 80 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.200.201 } } virtual_server 192.168.200.201 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 50 protocol TCP real_server 192.168.200.113 80 { weight 1 TCP_CHECK{ connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 192.168.200.11 80 { weight 1 TCP_CHECK{ connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } } ############################################################# vrrp_instance VI_2 { state MASTER interface eno16777728 virtual_router_id 52 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.200.202 } } virtual_server 192.168.200.202 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 50 protocol TCP real_server 192.168.200.113 80 { weight 1 TCP_CHECK{ connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } real_server 192.168.200.11 80 { weight 1 TCP_CHECK{ connect_timeout 3 nb_get_retry 3 delay_before_retry 3 connect_port 80 } } }
关闭防火墙，安全策略，启动服务并查看
#关闭防火墙，安全策略 [root@localhost ~]# systemctl stop firewalld [root@localhost ~]# iptables -F [root@localhost ~]# setenforce 0 #启动keepalived服务 [root@localhost ~]# systemctl start keepalived #查看VIP [root@localhost ~]# ip a | grep inet inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host inet 192.168.200.112/24 brd 192.168.200.255 scope global eno16777728 inet 192.168.200.202/32 scope global eno16777728 inet6 fe80::20c:29ff:fe96:8ef5/64 scope link #查看策略 [root@localhost ~]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.200.201:80 rr persistent 50 -> 192.168.200.113:80 Route 1 0 0 TCP 192.168.200.202:80 rr persistent 50 -> 192.168.200.113:80 Route 1 0 0
四、Apache服务器的配置（相同）
[root@localhost ~]# ifconfig lo:0 192.168.200.201 netmask 255.255.255.255 [root@localhost ~]# ifconfig lo:1 192.168.200.202 netmask 255.255.255.255 #查看配置 [root@localhost ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet 192.168.200.201/32 scope global lo:0 valid_lft forever preferred_lft forever inet 192.168.200.202/32 scope global lo:1 valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eno16777728: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:fb:c6:2d brd ff:ff:ff:ff:ff:ff inet 192.168.200.113/24 brd 192.168.200.255 scope global eno16777728 valid_lft forever preferred_lft forever inet6 fe80::20c:29ff:fefb:c62d/64 scope link valid_lft forever preferred_lft forever
路由配置
[root@localhost ~]# route add -host 192.168.200.201 dev lo:0 [root@localhost ~]# route add -host 192.168.200.202 dev lo:1
参数配置
[root@localhost ~]# 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 #启用参数 [root@localhost ~]# sysctl -p 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
安装httpd服务
[root@localhost ~]# yum -y install httpd #准备测试页 [root@localhost ~]# echo "111111" > /var/www/html/index.html #启动服务，关闭防火墙 [root@localhost ~]# systemctl restart httpd [root@localhost ~]# systemctl stop firewalld [root@localhost ~]# iptables -F [root@localhost ~]# setenforce 0
五、测试
