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Re: [lvs-users] LVS servers slowly draining traffic causing outages

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] LVS servers slowly draining traffic causing outages
From: LDB <thesource@xxxxxxxxxxx>
Date: Thu, 06 Mar 2008 10:29:07 -0500
Graeme Fowler wrote:
> On Thu, 2008-03-06 at 07:24 -0500, LDB wrote:
>> Any help would great ... I still cannot figure out why LVS just
>> arbitrarily drains the web traffic to zero and then a restart
>> fixes the problem.
> 
> I'm not 100% sure what you mean by "drains the web traffic to zero".
> 
> Is it the case that over a number of hours, the load balancers stop
> handling web traffic for the virtual hosts you've configured? If so, you
> probably have the ARP problem and have not hidden your loopback
> interfaces sufficiently on your realservers.
> 
> If something else, please clarify.
> 
> Thanks
> 
> Graeme
> 
> 
> _______________________________________________
> LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
> or go to http://lists.graemef.net/mailman/listinfo/lvs-users
> 
> 

Yes, that is correct Graeme.

Ahh, so I have hidden the eth0 MAC


[root@lvs1 ldb]# /sbin/ifconfig
eth0      Link encap:Ethernet  HWaddr 00:E0:81:28:08:9F
          inet addr:192.168.10.15  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:17803988 errors:0 dropped:0 overruns:0 frame:0
          TX packets:17120177 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1214681576 (1158.4 Mb)  TX bytes:2224292792 (2121.2 Mb)
          Base address:0xdc00 Memory:fe9e0000-fea00000

eth0:0    Link encap:Ethernet  HWaddr 00:E0:81:28:08:9F
          inet addr:192.168.10.46  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Base address:0xdc00 Memory:fe9e0000-fea00000

eth0:1    Link encap:Ethernet  HWaddr 00:E0:81:28:08:9F
          inet addr:192.168.10.70  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Base address:0xdc00 Memory:fe9e0000-fea00000

eth0:2    Link encap:Ethernet  HWaddr 00:E0:81:28:08:9F
          inet addr:192.168.10.90  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Base address:0xdc00 Memory:fe9e0000-fea00000

eth0:3    Link encap:Ethernet  HWaddr 00:E0:81:28:08:9F
          inet addr:192.168.10.80  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Base address:0xdc00 Memory:fe9e0000-fea00000

eth0:4    Link encap:Ethernet  HWaddr 00:E0:81:28:08:9F
          inet addr:192.168.10.180  Bcast:192.168.10.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Base address:0xdc00 Memory:fe9e0000-fea00000

eth1      Link encap:Ethernet  HWaddr 00:E0:81:28:08:9E
          inet addr:192.168.20.15  Bcast:192.168.20.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:67812 errors:0 dropped:0 overruns:0 frame:0
          TX packets:154145 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:13790575 (13.1 Mb)  TX bytes:52666672 (50.2 Mb)
          Base address:0xd880 Memory:fe9c0000-fe9e0000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:35239 errors:0 dropped:0 overruns:0 frame:0
          TX packets:35239 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:3659537 (3.4 Mb)  TX bytes:3659537 (3.4 Mb)



with the following ....


/sbin/arptables -F for vip in 192.168.10.46 192.168.10.70 \
192.168.10.90 192.168.10.80 192.168.10.180
do
        /sbin/arptables -A IN -d $vip -j DROP
        /sbin/arptables -A OUT -s $vip -j mangle --mangle-ip-s 192.168.10.15
done



but you are saying I need to hide the loopbacks on the VIPs (eth0:X)???

Thanks,

LDB



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