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標題: lvs-dr 模式異常 [打印本頁]

作者: greysky-zfj 時間: 2013-05-07 10:10
標題: lvs-dr 模式異常
lvs-dr模式對 80 端口做了集群，使用rr算法。在dr上用 ipvsadm 命令查看，一切正常，3臺realserver均在其中。

[root@localhost ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress

ort Scheduler Flags
-> RemoteAddress

ort          Forward Weight ActiveConn InActConn
FWM  3 rr
  -> x. x. x. x:80                         Local 1    0       0
  -> x. x. x. x:80                      Route 1    0       0
  -> x. x. x. x:80                      Route 1    0       0

從分配的連接數上可以看出有異常，但其實2臺realserver并未有任何連接被分配，所有的連接都被分配到第三臺，而且每次都是這樣。重啟keepalived服務后，恢復正常。keepalived的日志中并未有任何異常信息。

May  6 15:17:55 localhost Keepalived[19816]: Starting Keepalived v1.2.6 (01/22,2013)
May  6 15:17:55 localhost Keepalived[19817]: Starting Healthcheck child process, pid=19818
May  6 15:17:55 localhost Keepalived[19817]: Starting VRRP child process, pid=19819
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Initializing ipvs 2.6
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Interface queue is empty
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: No such interface, eth1
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Netlink reflector reports IP x. x. x. x added
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Netlink reflector reports IP fe80::2e:4fff:fec:436 added
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Registering Kernel netlink reflector
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Interface queue is empty
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Registering Kernel netlink command channel
May  6 15:17:55 localhost Keepalived_vrrp[19819]: No such interface, eth1
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Netlink reflector reports IP x. x. x. x added
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Netlink reflector reports IP fe80::2e:4fff:fec:436 added
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Registering Kernel netlink reflector
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Registering Kernel netlink command channel
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Registering gratuitous ARP shared channel
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Initializing ipvs 2.6
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Opening file '/etc/keepalived/keepalived.conf'.
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Configuration is using : 34487 Bytes
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Opening file '/etc/keepalived/keepalived.conf'.
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Configuration is using : 62292 Bytes
May  6 15:17:55 localhost Keepalived_vrrp[19819]: Using LinkWatch kernel netlink reflector...
May  6 15:17:55 localhost Keepalived_vrrp[19819]: VRRP sockpool: [ifindex(2), proto(112), fd(11,12)]
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Using LinkWatch kernel netlink reflector...
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Activating healthchecker for service [x. x. x. x]:80
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Activating healthchecker for service [x. x. x. x]:80
May  6 15:17:55 localhost Keepalived_healthcheckers[19818]: Activating healthchecker for service [x. x. x. x]:80
May  6 15:17:56 localhost Keepalived_vrrp[19819]: VRRP_Instance(VI_1) Transition to MASTER STATE
May  6 15:17:57 localhost Keepalived_vrrp[19819]: VRRP_Instance(VI_1) Entering MASTER STATE
May  6 15:17:57 localhost Keepalived_vrrp[19819]: VRRP_Instance(VI_1) setting protocol VIPs.
May  6 15:17:57 localhost Keepalived_vrrp[19819]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for x. x. x. x
May  6 15:17:57 localhost Keepalived_healthcheckers[19818]: Netlink reflector reports IP x. x. x. x added
May  6 15:18:02 localhost Keepalived_vrrp[19819]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for x. x. x. x

求解

作者: xiaodylan 時間: 2013-05-07 16:15
"其實2臺realserver并未有任何連接被分配" 這個在哪里看出來的？

作者: greysky-zfj 時間: 2013-05-07 16:17
回復 2# xiaodylan

在這2臺realserver上看的 80端口沒有任何連接，而第三臺卻有大量的80端口連接

作者: xiaodylan 時間: 2013-05-07 16:20
在lvs上直接telnet realserver的80 試試可否連接呢？

作者: greysky-zfj 時間: 2013-05-07 16:21
回復 4# xiaodylan

可以

作者: xiaodylan 時間: 2013-05-07 16:23
那如果可以的話，我覺得應該是配置的問題，能否貼一下配置？

作者: greysky-zfj 時間: 2013-05-07 16:28
回復 6# xiaodylan

! Configuration File for keepalived

global_defs {
router_id LVS_DEVEL
}

vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
priority 90
advert_int 1
authentication {
      auth_type PASS
      auth_pass 1111
}
virtual_ipaddress {
      x.x.x.250 }
}

virtual_server fwmark 3 {
delay_loop 3
lb_algo rr
lb_kind DR
#  persistence_timeout 50
protocol TCP

real_server x.x.x..132 80 {
   MISC_CHECK {
         misc_path "/lvs/checkHTTP.sh x.x.x.132"
         misc_timeout 6
         nb_get_retry 3
               }
}
real_server x.x.x.136 80 {
      MISC_CHECK {
         misc_path "/lvs/checkHTTP.sh x.x.x.136"
         misc_timeout 2
         nb_get_retry 2
               }
}
real_server x.x.x.144 80 {
      MISC_CHECK {
         misc_path "/lvs/checkHTTP.sh x.x.x.144"
         misc_timeout 2
         nb_get_retry 2
               }
}
}

作者: xiaodylan 時間: 2013-05-07 17:24
有人遇到過這樣的情況"以前一直使用tcp_check，現(xiàn)在準備換成misc_check用于動態(tài)調整權重,在我的rs經歷一次reboot后，lvs沒有恢復其權重，而是把權重變成了0" 但是和你的情況不太一樣，我不知道你嘗試過試用tcp_check么？

作者: greysky-zfj 時間: 2013-05-07 17:27
回復 8# xiaodylan

沒有
不過既然 ipvsadm
顯示是realserver存在的，就應該往上面分配啊

作者: xiaodylan 時間: 2013-05-07 17:32
你說的重啟過后就恢復正常是什么意思？

作者: greysky-zfj 時間: 2013-05-07 17:39
本帖最后由 greysky-zfj 于 2013-05-07 17:40 編輯

回復 10# xiaodylan

重啟keepalived服務后，那2臺沒有連接的服務，馬上就有連接分配過來了，每次都這樣，而且每次都是這2臺有問題，第3臺正常

作者: xiaodylan 時間: 2013-05-07 17:43
額...防火墻的設置呢？

作者: greysky-zfj 時間: 2013-05-07 17:44
回復 12# xiaodylan

防火墻不用考慮了

作者: i.am 時間: 2013-05-09 08:47
那你重啟后大概多久問題會出現(xiàn)呢?前后有么有什么日志呢

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