[lvs-users] New lvs user questions

Simon Horman horms at verge.net.au
Fri Jun 10 08:39:29 BST 2011


On Thu, Jun 09, 2011 at 11:53:21PM -0700, Ray W. Johnson wrote:
> 
> 
> 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?

That version should work fine although many new features have been added
since then.  If you want/need the latest version of LVS, the latest kernel
is the best place to be.

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

Yes.




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