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lvsd 配置正确吗？

tag-icon • tag-icon centos redhat high-availability
lvsd 配置正确吗？

我使用 Piranha 为 httpd 设置了故障转移。我对服务器进行了相同的设置，但其中一个服务器显示 VIPS，而另一个服务器没有显示。这是正常的吗？

服务器 A）[主]

[root@titania ~]# ipvsadm -L
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  172.16.28.231:http lblc
  -> 172.16.28.229:http           Route   1      0          0
  -> 172.16.28.230:http           Route   1      0          0
[root@titania ~]

[root@titania ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:15:5D:1C:D4:04
          inet addr:172.16.28.233  Bcast:172.16.28.255  Mask:255.255.255.0
          inet6 addr: fe80::215:5dff:fe1c:d404/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1115300 errors:0 dropped:0 overruns:0 frame:0
          TX packets:686246 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:115178238 (109.8 MiB)  TX bytes:50225507 (47.8 MiB)

eth0:1    Link encap:Ethernet  HWaddr 00:15:5D:1C:D4:04
          inet addr:172.16.28.231  Bcast:172.16.28.255  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:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:838 (838.0 b)  TX bytes:838 (838.0 b)

[root@titania ~]#

[root@titania ~]# cat /etc/sysconfig/ha/lvs.cf
serial_no = 53
primary = 172.16.28.233
service = lvs
backup_active = 1
backup = 172.16.28.232
heartbeat = 1
heartbeat_port = 539
keepalive = 6
deadtime = 18
network = direct
debug_level = NONE
monitor_links = 1
syncdaemon = 1
syncd_iface = eth0
syncd_id = 0
virtual http {
     active = 1
     address = 172.16.28.231 eth0:1
     vip_nmask = 255.255.255.0
     port = 80
     send = "GET / HTTP/1.0\r\n\r\n"
     expect = "HTTP"
     use_regex = 0
     load_monitor = none
     scheduler = lblc
     protocol = tcp
     timeout = 6
     reentry = 15
     quiesce_server = 1
     server deimos {
         address = 172.16.28.229
         active = 1
         weight = 1
     }
     server phobos {
         address = 172.16.28.230
         active = 1
         weight = 1
     }
}
[root@titania ~]#

服务器 B）[辅助]

IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
[root@titan ~]#
[root@titan ~]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:15:5D:1C:34:01
          inet addr:172.16.28.232  Bcast:172.16.28.255  Mask:255.255.255.0
          inet6 addr: fe80::215:5dff:fe1c:3401/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:529515 errors:0 dropped:0 overruns:0 frame:0
          TX packets:81242 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:31911311 (30.4 MiB)  TX bytes:4919228 (4.6 MiB)
          Interrupt:9 Base address:0x2000

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:236 errors:0 dropped:0 overruns:0 frame:0
          TX packets:236 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:22532 (22.0 KiB)  TX bytes:22532 (22.0 KiB)

[root@titan ~]#
[root@titan ~]# cat /etc/sysconfig/ha/lvs.cf
serial_no = 51
primary = 172.16.28.233
service = lvs
backup_active = 1
backup = 172.16.28.232
heartbeat = 1
heartbeat_port = 539
keepalive = 6
deadtime = 18
network = direct
debug_level = NONE
monitor_links = 1
syncdaemon = 1
syncd_iface = eth0
syncd_id = 0
virtual http {
     active = 1
     address = 172.16.28.231 eth0:1
     vip_nmask = 255.255.255.0
     port = 80
     send = "GET / HTTP/1.0\r\n\r\n"
     expect = "HTTP"
     use_regex = 0
     load_monitor = none
     scheduler = lblc
     protocol = tcp
     timeout = 6
     reentry = 15
     quiesce_server = 1
     server deimos {
         address = 172.16.28.229
         active = 1
         weight = 1
     }
     server phobos {
         address = 172.16.28.230
         active = 1
         weight = 1
     }
}
[root@titan ~]#

答案1

是的，对于 LVS 来说，这是正常且预期的行为。

由于这是一个高可用性设置，负载平衡 IP（本例中为 172.16.28.231）将仅驻留在活动节点上。如果您要停止服务器 A 上的脉冲守护程序，则会自动将负载平衡 IP 故障转移到服务器 B（假设脉冲守护程序正在运行且服务器 B 处于健康状态）。故障转移应该几乎是即时的，一旦发生，请重新启动服务器 A 上的脉冲守护程序。

此工作流程和故障转移验证的命令如下：

Server_B# service pulse status
pulse (pid  PID_NUMBER) is running...
Server_A# service pulse stop
Server_B# ifconfig # Verify the VIP failed over eth0:X on Server_B
Server_A# service pulse start

您将能够使用此方法在节点之间来回进行故障转移。

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