[Rocks-Discuss] How to add web server roll to existing cluster?

[Ryan Golhar]

I followed the User's Guide to set up a basic cluster. I now want to add
the web server roll to my cluster. I can't seem to find any documentation
on how to do this. Is this possible?

I looked at the docs for the SGE roll and it says I cannot add the SGE roll
to an existing cluster, instead I need to rebuild it. Is that true?
Suppose I have software this is not in a roll that I need to add to my
cluster. Does this mean every time I want to modify the cluster, I will
need to re-install the entire cluster?

Ryan
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[Jon Forrest]

On 12/22/2011 7:19 AM, Ryan Golhar wrote:
> I followed the User's Guide to set up a basic cluster. I now want to add
> the web server roll to my cluster. I can't seem to find any documentation
> on how to do this. Is this possible?

Why do you need a roll for this? Rocks already has a web server running
on the frontend and the compute nodes.

Jon Forrest

[Philip Papadopoulos]

Hi Ryan,
Most rolls can be added after the fact -- some absolutely cannot (e.g.,
base, kernel, xen).

I believe i properly re-engineered the web-server roll for 5.4.3 so that it
can be added after the fact.

Try the following

# rocks add roll web-server *iso
# rocks enable roll web-server
# cd /export/rocks/install
# rocks create distro
# rocks run roll web-server | sh

BTW, Jon is right, there is already httpd running and configured, The
web-server roll gives you wordpress and therefore makes more
sense when browsing to your cluster.

-P

--
Philip Papadopoulos, PhD
University of California, San Diego
858-822-3628 (Ofc)
619-331-2990 (Fax)

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[Ryan Golhar]

>>On 12/22/2011 7:19 AM, Ryan Golhar wrote:
>> I followed the User's Guide to set up a basic cluster. I now want to add
>> the web server roll to my cluster. I can't seem to find any
documentation
>> on how to do this. Is this possible?

>Why do you need a roll for this? Rocks already has a web server running
>on the frontend and the compute nodes.

>Jon Forrest

Because I want Ganglia web interface available. I installed Ganglia but
don't know the URL to view the Ganglia interface. I thought that Ganglia
required a web server and I didn't install the web server roll, so I
thought I needed to include it.

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