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操作系统:Centos-6.5_x86_64
keepalived软件安装在node2和node3机器上。
实际安装之前,先关闭keepalived节点(node2,node3)上的防火墙。
[root@node2 ~]# service iptables stop
这里需要安装的软件是keepalived。node2和node3都需要安装。
[root@node2 ~]# yum install keepalived
安装完毕后,配置文件在/etc/keepalived/keepalived.conf下。
1、MASTER配置文件(node2):
! Configuration File for keepalived bal_defs { notification_email { root@localhost } notification_email_from laoxiao@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } 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 { 192.168.103.100/24 dev eth0 label eth0:1 } } virtual_server 192.168.103.100 80 { delay_loop 6 lb_algo wrr lb_kind DR nat_mask 255.255.255.0 persistence_timeout 50 protocol TCP real_server 192.168.103.101 80 { weight 1 HTTP_GET { url { path / status_code 200 } connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } real_server 192.168.103.105 80 { weight 1 HTTP_GET { url { path / status_code 200 } connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } }
2、BACKUP配置文件(node3):
! Configuration File for keepalived bal_defs { notification_email { root@localhost } notification_email_from laoxiao@localhost smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 51 priority 50 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.103.100/24 dev eth0 label eth0:1 } } virtual_server 192.168.103.100 80 { delay_loop 6 lb_algo wrr lb_kind DR nat_mask 255.255.255.0 persistence_timeout 50 protocol TCP real_server 192.168.103.101 80 { weight 1 HTTP_GET { url { path / status_code 200 } connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } real_server 192.168.103.105 80 { weight 1 HTTP_GET { url { path / status_code 200 } connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } }
[root@node2 ~]# service keepalived start
[root@node3 ~]# service keepalived start
启动时产生的日志在/var/log/messages文件中,可以观察其中的日志。MASTER效果如下:BACKUP会略有不同。
[root@node2 ~]# ifconfig eth0 Link encap:Ethernet HWaddr 00:0C:29:CE:06:D7 inet addr:192.168.103.102 Bcast:192.168.103.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fece:6d7/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:11485 errors:0 dropped:0 overruns:0 frame:0 TX packets:33202 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2217383 (2.1 MiB) TX bytes:2537512 (2.4 MiB) eth0:1 Link encap:Ethernet HWaddr 00:0C:29:CE:06:D7 inet addr:192.168.103.100 Bcast:0.0.0.0 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
[root@node2 ~]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.103.100:80 wrr persistent 50 -> 192.168.103.101:80 Route 1 0 0 -> 192.168.103.105:80 Route 1 0 0
上述可以看到MASTER中的网卡是启用的。
[root@node3 keepalived]# ifconfig eth0 Link encap:Ethernet HWaddr 00:0C:29:BE:D3:CA inet addr:192.168.103.103 Bcast:192.168.103.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:febe:d3ca/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:249981 errors:0 dropped:0 overruns:0 frame:0 TX packets:72173 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:284573915 (271.3 MiB) TX bytes:5287459 (5.0 MiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:1898 errors:0 dropped:0 overruns:0 frame:0 TX packets:1898 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:229406 (224.0 KiB) TX bytes:229406 (224.0 KiB)
[root@node3 keepalived]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.103.100:80 wrr persistent 50 -> 192.168.103.101:80 Route 1 0 0 -> 192.168.103.105:80 Route 1 0 0
如果node3没有关闭防火墙的话,也会启用eth0:1网卡,所以注意将防火墙关闭。
Linux下Keepalived+LVS-DR模式配置高可用负载均衡集群
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原文地址:http://www.cnblogs.com/tq03/p/5083423.html