[Linux-cluster] urgenet question about shared-root + GFS

[Daniel EPEE LEA]

Hi,

I have installed node 1 and node 2 with seperate root partitions, i mean
each node has it's own root partition ( /boot /usr /home /var /tmp). Nodes
are RAID 1+ 0.

How do I setup my shared SAN storage to implement a shared GFS root for my
cluster nodes ?

My goal is to achieve ACTIVE/ACTIVE GFS cluster. Does open-sharedroot
support RHEL ES v4 Update 2 ( kernel 2.6.9-22.ELsmp #1 SMP ). If not how do
I setup the sym links for both nodes to share / partitions ?

Thanks for your help,

Much regards,

Daniel




On 1/4/06, Mark Hlawatschek <hlawatschek at atix.de> wrote:
>
> Hi Sara,
>
> > we are planning to service 200000 customers for
> > internet services such as webhosting,email,DNS.We have
> > designed about 8 servers for each service to run a
> > share of the load.I want to use Clustersuit as well as
> > GFS as we are making use of SAN.
> Very good. We've built some solutions for internet services based on a GFS
> storage cluster with great success. We also created a diskless shared root
> cluster environment (cluster boots from SAN and shares the same root
> partition) for enhanced management and scalability. We determined that
> using
> a shared root cluster extremely reduces the effort for system
> administration.
> Besides, the scalability of the cluster and replacement of cluster nodes
> can
> be done within minimum timeframe and minimum installation work. As you
> want
> to create a cluster with 8 nodes and more, you should also think about
> that.
> We are in progress of releasing the shared root software at source forge
> site.
> The project's name will be open-sharedroot.
> > As I have studied mannuals of clustersuit , it seems
> > that there is only one service up in each
> > clustersystems , my question is we this high number of
> > users How can I rely just on one servers , I know that
> > another server in failoverdomain comesup incase of
> > first server failure , but what about load balancing?
> > how can I have all of me servers running in my
> > clustersystems ?
> > I have studied about pirnaha for IP load balancing but
> > it seems that I can not use GFS with Pirnaha?
> > I appreciate If any one could help me reagrding this
> > issue?
> As this topic has been already discussed, he're just a short sum-up:
> - You need an IP load-balancer in front of your cluster. You can use a
> hardware solution or a software solution like Piranha or other packages
> using
> LVS to implement this. To achieve highest availability you shoud create at
> least an active/passive HA cluster. The nicest solution would be an
> active/active loadbalancing.
> - To host the services you need to create the GFS storage cluster (also
> think
> about using shared root). Depending on the type of service, the
> applications
> are running in parallel on each cluster node (e.g. apache, tomcat, php),
> or
> are integrated into a failover configuration (e.g. mySQL).
>
> Best Regards,
> Mark
> --
> Gruss / Regards,
>
> Dipl.-Ing. Mark Hlawatschek
> Phone: +49-89 121 409-55
> http://www.atix.de/
>
> **
> ATIX - Ges. fuer Informationstechnologie und Consulting mbH
> Einsteinstr. 10 - 85716 Unterschleissheim - Germany
>
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