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It doesn't seem to be flipping back. For example, I have two Windows
terminal servers. When I want to maintain one of them, I set it's weight
to 0, which prevents new connections while continuing to service active
ones. The weight remains 0 even though the system is up and the
healthchecks (checktype=connect) are running. When the active connection
count drops to 0, then I turn the server off and work on it. After
turning it back on, I manually set the weight to 1 and then people can
log into it.
That's what made me think there was a difference between what ldirectord
does and what I do at the command line.
So now I'm trying the same thing with a pair of servers running a bunch
of httpd processes. I have a script that sets the weights for all VS
running pointed to a particular RS. To maintain one of the RS, I run the
script to set all its weights to 0 and then I wait for the active
connection counts to all reach 0.
That's whan I realized I have a problem. After I've run the script, how
can I tell the difference between ones that are really down and ones
that were set down by the script.
I have a feeling I'm approaching this wrong.
--
Eric Robinson
-----Original Message-----
From: lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx
[mailto:lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Thomas
Pedoussaut
Sent: Thursday, December 04, 2008 6:29 AM
To: LinuxVirtualServer.org users mailing list.
Subject: Re: [lvs-users] How to Tell If an RS Is Really Up
Robinson, Eric wrote:
>> what's your criteria for up and down?
>> You can tell the weights by running `ipvsadm`
>>
>
> Sorry for being ambiguous. The question is, when ipvsadm displays
> weight 1, how do I know the weight was changed to 1 by a healthcheck
> and not just by someone running ipvsadm with -w 1?
>
Because your healthcheck will flip it back to 0 or even remove it within
a few seconds if it's down ?
The healthcheck does nothing more ipvs wise than setting the weight with
ipvsadm -w .....
Think about it as 2 separate processes. ipvs doesn't care if the RS is
"up" or "down", and keepalived (or other) doesn't really care if IPVS is
passing traffic to it.
--
Thomas
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