Re: [gentoo-cluster] High-Availability Howto for Gentoo

[Jan Klopper]

Im running a 5 node gentoo LVS apache cluster.
It has full hearthbeat failover (over ip), and ldirectd functionality.

Im using a tweaked direct route setup in which there are two directors,
checkup on each other trough hearthebeat. which redirect packages to 3 other
nodes, and localnode.
All nodes have a full internet connection though, which allows for phased
setup. (no need to setup the whole portage / binary replication thing first.
each node can keep himself up-to-date.)

If we're going to setup a nice wiki tut, il put up my configs aswell.
ironically i used a win2k + LVS tutorial to get my system to work as it
should.

The whole concept of all those LVS monkey releases is something i didn't
really grasp at first, since gentoo doesn't install the packages like that,
but just keeps them all up to dat trough portage, which is very different to
what the LVS docs are talking about.

The one thing im still strugling with is a way to share and replicate a set
of stable files, they don't change often, but when they do, each cluster
node ought to be updated.

I had an extra NFS server for this, outside the cluster, connected over
local ip's, but the one node i has setup to talk to that (with enough swap
space to keep a local cache i figured), crashed on me,making me damn
reluctant to try it out on the rest.

greets
Jan

On 4/7/06, Hanni Ali <hanni.ali@×××××.com> wrote:
>
> Ok,
>
> I suggest we try to put the documentation together on gentoo-wiki.com I've
> always found this site an excellent resource.
>
> There are already two stubs which I feel we should build on and kyron has
> compiled an excellent list of programs if you follow the links.
>
> http://gentoo-wiki.com/Index:HOWTO#Build_a_Gentoo_High_Performance_Cluster
>
> I suggest we start Build a Gentoo High Availability Cluster.
>
> http://www.gentoo.org/proj/en/cluster/
>
> This is the gentoo cluster page and we only have three How To's All of
> which have floors I've kept tabs on problems I've run into with the HPC
> howto and distcc howto. I feel we should keep openMosix separate and have a
> completely separate set of Howto's for that.
>
> My clusters are generally diskless nodes so I suggest we try to
> incorporate this howto into the gentoo-wiki
>
> http://www.gentoo.org/doc/en/diskless-howto.xml
>
> Though this also has it's fair share of difficulties.
>
> I'm prepared to share a certain amount of my work on this. It would be
> nice to make this documentation easily understandable for all and I'm always
> up for people adding where they run into problems and WHY into these sort of
> documents.
>
> I'm looking carefully at HA diskless nodes and ways in which to ensure
> redundancy if the master node fails. Suggestions on this would be welcomed.
>
> How many people would be interested in helping out with this. If you've
> read this far it must be because it's a Friday afternoon so anything can
> distract you!
>
> Cheers
>
> Hanni
>
>
>
>
>
> On 07/04/06, Bryan Stalcup <bryan@×××××××××.biz> wrote:
> >
> > i have a functioning high availability cluster with heartbeat, drbd
> > and drbdlinks (highly recommend, wish it were in the gentoo packages
> > repository).
> >
> > some of my work is documented (piecemeal) at http://bbix.biz/tavi,
> > but i'd be happy to flesh it out more and answer any questions, give
> > sample config files, etc.
> >
> > bryan
> >
> > On Apr 7, 2006, at 7:18 AM, Mathias Weigt wrote:
> >
> > > Hi!
> > > Is there a special HA-Howto for Gentoo Linux anywhere?
> > > I came across this japanese Document, but unfortunately I don't
> > > understand a single world.
> > > http://www.gentoo.gr.jp/jpdoc/failover.xml
> > >
> > > I want to setup a Gentoo-Server with DRBD and automatic failover
> > > but all the available HOWTOs are not Gentoo-specific.
> > >
> > > I don't have any experience with HA and DRBD and a Document which
> > > adresses Gentoo in this respect would be really appreciated.
> > >
> > > Mathias
> > > --
> > > gentoo-cluster@g.o mailing list
> > >
> >
> > --
> > gentoo-cluster@g.o mailing list
> >
> >
>
>
> --
>
> E-mail: hanni.ali@×××××.com
> Mobile: [phone]
> Website: www.ainkaboot.co.uk
>



--
Vr gr,
Jan Klopper
Innerheight Internet Diensten
http://www.innerheight.com