Re: [lvs-users] Stopping an real server for upgrade

To: " users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] Stopping an real server for upgrade
From: Simon Horman <horms@xxxxxxxxxxxx>
Date: Mon, 20 Sep 2010 21:41:41 +0900
On Mon, Sep 20, 2010 at 11:02:07AM +0200, Arie Skliarouk wrote:
> >
> > Is there a way to make loadbalancer to "rehash" it's persistency IP tables
> >> so that new requests from IP numbers assigned to the real server with zero
> >> weight will be forwarded elsewhere?
> >>
> >
> Yes, you need to set /proc/sys/net/ipv4/vs/expire_quiescent_template to a
> > non-zero value.
> >
> Thank for the hint, I have found where the setting is explained in detail.
> I understand that with this sysctl no new connections will get forwarded to
> the real server. Even ones that previously were assigned to the server via
> persistence mechanism.
> One thing is still not clear to me: if I set this sysctl to 1 and set weight
> of a real server to 0, will the already established connections to the
> server get broken?

No, established connections shouldn't be broken.
Please let me know if you observe otherwise.

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