Re: [HTCondor-users] help setting up condor

[Edier Zapata <edalzap@xxxxxxxxx>]

Ok, there's a problem, HTCondor needs a "real" hostname to connect nodes in the pool, so:

1. Which Operating System are you using? Linux Ubuntu, Linux CentOS, Scientific Linux?

2. You need to assign a hostname to each node (maybe: testmaster.test.cern.ch and testnode.test.cern.ch)

3. I assume both are in a LAN, so in the /etc/hosts you have to add the LAN IP of each one in this way:

assumming LAN's IP are 192.168.1.2 (testmaster) and 192.168.1.3 (testnode), the /etc/hosts in both should look like this:

127.0.0.1 Â localhost localhost.localdomain localhost4 localhost4.localdomain4

192.168.1.2 testmaster.test.cern.ch testmaster

192.168.1.3 testnode.test.cern.ch testnode

::1 Â Â Â Â localhost localhost.localdomain localhost6 localhost6.localdomain6

If you're using ubuntu, the hostname can be change editing the /etc/hostname file, if you're using Redhat's like Linux (CentOS, SL, etc), the hostname is in: /etc/sysconfig/network

and restarting the node.

Bye

On Tue, Feb 24, 2015 at 9:18 AM, Jose Feliciano Benitez <Jose.Benitez@xxxxxxx> wrote:

Hi Edier,

Thanks for those instructions.

Iâm not familiar with setting DNS/FQDN, can you tell me exactly how to do step #3.

This is what /etc/hosts Âhas on both machines:

127.0.0.1 Â localhost localhost.localdomain localhost4 localhost4.localdomain4

::1 Â Â Â Â localhost localhost.localdomain localhost6 localhost6.localdomain6

Jose

On Feb 24, 2015, at 2:59 PM, Edier Zapata <edalzap@xxxxxxxxx> wrote:

As I understand you set up two One Node Pools, and now you want to change one of the One node to a Execute node, I'm right?

Assuming I'm right:

1. You should change the DAEMONS in your condor_config file, and remove all but STARTD and MASTER

2. Change the CONDOR_HOST in the Execute node so it points to the Master node.

3. If you don't have a DNS, add in the /etc/hosts file of both nodes the FQDN of the Two nodes (so you can access by name to from one to another)

4. Restart Execute node.

I think with this you should get it working.

Good day :)

On Tue, Feb 24, 2015 at 6:20 AM, Jose Feliciano Benitez <Jose.Benitez@xxxxxxx> wrote:

Hi,
Iâm new to condor. We have a few machines we want to use as a cluster. I installed condor on two machines so far for testing. Iâve tried running condor on each machine individually and it seems to run fine. When I do condor_status it gives me a list of the cpus in the machine.

Then I tried to connect the machines by setting the HOST parameter in one machine to the name of the other machine. In this case when I do: condor_status it shows only the cpus of the HOST but not of the worker. Both the host and the worker give the same output. Iâve not been able to figure out why the host seems not to be able to detect the cpus of the worker.

Any help would be appreciated.

Thanks,
Jose



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Edier Alberto Zapata HernÃndez
Ingeniero de Soporte en Infraestructura
CIER - Sur

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--

Edier Alberto Zapata HernÃndez
Ingeniero de Soporte en Infraestructura
CIER - Sur