High availability virtual ip

[Michael Tewner]

Hi all -

If all you want to do is float an IP, Linux-HA will work, but a simpler
solution could be, say, keepalived and vrrpd.

I you would like to also manage cluster resources, Linux-HA is your best
solution. I would agree that it has a steep learning curve, and it's a pain,
but it does exactly what you want, and more. It will handle all of your
cluster resources - We've used it for MySQL, DRBD, OCFS2, Asterisk, and
others.

Other options include virtualMonkey and/or Linux Virtual Server

...But I would NOT agree with Itay's "I would recommend not using Linux-HA
for any means." Linux-HA is the PROPER open solution to clustering, and just
'cause it's hard to figure out doesn't mean that you should choose a less
appropriate product.

Check:
http://www.ntua.gr/lvsp/Joseph.Mack/HOWTO/LVS-HOWTO.failover.html

-Mike


On Tue, Jun 23, 2009 at 5:04 PM, Maxim Veksler <hq4ever at gmail.com> wrote:

> On Tue, Jun 23, 2009 at 9:01 AM, Itay Donenhirsch <itay at bazoo.org> wrote:
> >
> > Hi Folks,
> >
> > I would recommend not using Linux-HA for any means. I had very bitter
> > experience with it. It is implemented in a very complicated and hard
> > to debug and configure. It's also very poorly tested. I first didn't
> > believe it myself and thought I was doing something wrong, but after
> > some email exchanges with its developer it became apparent that it
> > fails some very basic scenarios (like switch power-down for instance).
> > Moreover, the linux-ha people themselves will confuse you with which
> > version to use (2.99/2.1.4, heartbeat or pacemaker, etc).
> >
> > If you'd like more detailed explanation, or had different experience,
> > you are more than welcome to email me.
> >
>
> Heartbeat has 2 faces, It can work great or it can fail bitterly.
> It has a very steep learning curse before something useful begins to
> happen.
>
> cibadmin -Q, crm_attribute are your friends.
>
> I agree with Itay, from our experience it is indeed buggy but working.
>
>
> Maxim.
>
> > Itay
> >
> > On Tue, Jun 16, 2009 at 9:55 PM, Oleg Goldshmidt<pub at goldshmidt.org>
> wrote:
> > > Marc Volovic <marcvolovic at me.com> writes:
> > >
> > >> Hi
> > >>
> > >> First, the problem is not an IP, but the mac-ip mapping and ARP
> > >> caching strategies.
> > >>
> > >> Second, don't use ping.
> > >>
> > >> Third, do use project 'heartbeat' and 'fake'. They provide what you
> > >> need.
> > >
> > > Heartbeat is a component of Linux-HA, which is why I pointed to the
> > > latter ;-)
> > >
> > > http://www.linux-ha.org/Heartbeat
> > >
> > > --
> > > Oleg Goldshmidt | pub at goldshmidt.org
> > >
> > > _______________________________________________
> > > Linux-il mailing list
> > > Linux-il at cs.huji.ac.il
> > > http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
> > >
> >
> > _______________________________________________
> > Linux-il mailing list
> > Linux-il at cs.huji.ac.il
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>
>
>
> --
> Cheers,
> Maxim Veksler
>
> "Free as in Freedom" - Do u GNU ?
>
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