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Greetings
I have setup the LVS based on LVS-NAT configuration. When outside host tries
to access the Real Servers than they are going through the Virtual IP
successfully. When Real Servers originate the traffic to the outside host
than it is not going through the Virtual IP. On my router i see that the
traffic is coming from the IP of Real Host.
Does anyone help in this regard. I want the every traffic coming in or going
out must go through the Virtual IP.
Mansoor
From: lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
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To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: lvs-users Digest, Vol 50, Issue 11
Date: Mon, 12 Mar 2007 12:00:03 +0100 (CET)
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Today's Topics:
1. Re: Quiescent server connections (Adrian Chapela)
2. Re: Quiescent server connections (Janusz Krzysztofik)
From: Adrian Chapela <achapela.rexistros@xxxxxxxxx>
Reply-To: "LinuxVirtualServer.org users mailing
list."<lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
To: "LinuxVirtualServer.org users mailing
list."<lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: Quiescent server connections
Date: Mon, 12 Mar 2007 08:36:54 +0100
Ben Hollingsworth escribió:
OK, so I've got my setup nailed down pretty well. This is pair of squid
web proxies on a 2-host LVS running UltraMonkey / HB 2.0.7-8 on RHEL4
(2.6.9). I'm struggling with one more thing, though. With
quiescent=true, if I shut down squid on one box, connections from new
hosts fail over to the other box just fine, but connections from
persistent hosts keep going to the same, dead box. I realize this is as
OK, to solve the problem there are two variables:
/proc/sys/net/ipv4/vs/expire_nodest_conn --> to expire connections before
the protocol timeout. This is to solve the problem when a server goes down.
For example in the UDP protocol the protocol timeout is too high.
/proc/sys/net/ipv4/vs/expire_quiescent_template --> this variable I think
is the variable to solve your problem. With this you timeout your
persistent template when a server goes down.
I don't know what them makes exactly but the first solve my problems. You
could make a test.
Best regards.
intended. If I set quiescent=false, all client communication with the
dead box ceases immediately, which includes cutting off active
connections at the knees. That's not an issue if the squid actually
dies. However, most of our failovers will be due to my own planned
maintenance. In that case, I'd like to allow existing connections
(which may be lengthy downloads) to finish before sending new requests
(even from persistent clients) to the live box. I can't find any way to
do this without hacking the kernel to match a 2-yr-old patch that Horms
published (assuming that even applies to my setup). Most of the info
about this seems to have been written three years ago. Is there a way
to make this work without a custom compile?
------------------------------------------------------------------------
From: Janusz Krzysztofik <jkrzyszt@xxxxxxxxxxxx>
Reply-To: "LinuxVirtualServer.org users mailing
list."<lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
To: "LinuxVirtualServer.org users mailing
list."<lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: Quiescent server connections
Date: Mon, 12 Mar 2007 11:33:39 +0100
Dnia sobota, 10 marca 2007 00:24, Ben Hollingsworth napisaÅ?:
> OK, so I've got my setup nailed down pretty well. This is pair of squid
> web proxies on a 2-host LVS running UltraMonkey / HB 2.0.7-8 on RHEL4
> (2.6.9). I'm struggling with one more thing, though. With
> quiescent=3Dtrue, if I shut down squid on one box, connections from new
> hosts fail over to the other box just fine, but connections from
> persistent hosts keep going to the same, dead box.
I have one solution, but it works only in case of transparent proxy setup.
Instead of persistance, use lblc scheduler (without persistance). lblc
itself
gives you some kind of persistance of 6 minutes or more. If 6 minutes is
not
enough for you, please look here:
http://kb.linuxvirtualserver.org/wiki/Talk:Locality-Based_Least-Connection_Scheduling
Cheers,
Janusz
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