[lvs-users] New lvs user questions

Ray W. Johnson raywjohnson at gmail.com
Fri Jun 10 07:53:21 BST 2011



On 06/09/2011 05:01 PM, Simon Horman wrote:
> On Thu, Jun 09, 2011 at 01:33:46PM -0700, Ray W. Johnson wrote:
>    
>> Greetings all,
>>
>> New to the list and to LVS. Just need a bit of insight. Please excuse
>> these potential newbie questions.
>>
>> I read through most of the HOWTO (:-1) specifically on the LVS-DR setup
>> (http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.LVS-DR.html). I
>> think this is the best way to accomplish my goal.
>>
>> I have 10 servers, all with regular IPs. One will act as director, the
>> others as real servers. However, I do not have direct access to them.
>> Only via SSH login. So my questions are directly related to remote access.
>>
>> Is setting up LVS via SSH even possible?
>>
>> Can all the servers have IP aliases that allow me direct access via SSH?
>>
>> Can I just use normal/public IPs (and not private 192. IPs)? (note: the
>> director will eventually be set to only allow connections from specified
>> outside IPs/clients and those connections will have heavy filtering)
>>
>> Am I missing something critical? :/
>>
>> Thanks for any info or insight. I will be re-reading the HOWTOs and docs.
>>      
> Hi Ray,
>
> the answer to all your questions is Yes.
>
> If you are planning to do this without remote access you
> will need to be careful that you don't loose network connectivity
> - e.g. due to a misconfiguration while setting things up.
> For this reason I would suggest using at least one of the
> following if possibile.
>
> 1) A separate physical NIC for admin
> 2) Serial console or other lights-out access
>
> If that is not possible you will just need to be super careful.
> I would start with a trial run on machines you do have console
> access to.
>    

I will do a trial run on my extra laptop.

The director has kernel version 2.6.18-238.el5. Do I still need to patch 
or download one from ftp.kernel.org?

And, the servers need an RIP and VIP, can the VIP's still be private 
(192.x.x.x) IPs?

--RayJ





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