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XROOTD-L  May 2013

XROOTD-L May 2013

Subject:

Re: Anybody with puppet for xrootd ?

From:

Martin Philipp Hellmich <[log in to unmask]>

Reply-To:

Support use of xrootd by HEP experiments <[log in to unmask]>

Date:

Fri, 24 May 2013 15:08:55 +0000

Content-Type:

multipart/signed

Parts/Attachments:

Parts/Attachments

text/plain (222 lines) , smime.p7s (222 lines)

Hi Henrik,

another question:
If I set a variable twice in the config file, e.g. ofs.osslib, will the value get overwritten?
I know that some vars, like all.export can appear multiple times, but not all, right?

Cheers
Martin
On May 24, 2013, at 12:27 PM, Henrik Öhman <[log in to unmask]> wrote:

> Hi Martin,
> 
> I'm trying to get the DPM xrootd module working in a custom
> environment, but I am still not entirely sure how to begin. Right now
> I have a basic VM instance running CentOS 6.4 with puppet installed. I
> have downloaded the punch modules and the manifests-testbed, but I
> don't believe that the xrdbase.pp maniest is applicable to this use
> case. Could you give me some hints on whether I can use the punch
> modules on a custom VM, or if they depend on some domain specific
> requirements for CERN?
> 
> Secondly, I looked through the configuration template, and so far I've
> found a couple of things that might not agree with the ATLAS Tier3
> configuration file I've been using. Perhaps these options are
> configured in some other way, but here are the differences:
> 
> oss.localroot: We set this to /data/scratch by convention
> acc.authdb: This is set to /etc/xrootd/auth_file, which contains the
> single line 'u * /atlas a' to give users full access to the atlas area
> frm.xfr.copycmd: This is set to 'in stats /etc/xrootd/stagein.sh $SRC
> $DST $CGI' on the nodes
> 
> There are a few other options we use that are not available in the
> xrootd.cfg.erb template. I'm not an xrootd expert - in fact I barely
> know it - so I don't know the significance or impact of these options.
> I have attached xrootd.cfg, auth_file, and stagein.sh.
> 
> Best regards,
> Henrik
> 
> On 22 May 2013 09:53, Martin Philipp Hellmich <[log in to unmask]> wrote:
>> Hi Henrik,
>> 
>> did you get a chance to try it?
>> 
>> Cheers
>> Martin
>> 
>> On May 17, 2013, at 3:55 PM, Martin Philipp Hellmich <[log in to unmask]> wrote:
>> 
>>> Hi all,
>>> 
>>> so the module should be able to configure a dpm with xrootd as head node or disk node, but _without_ federation.
>>> It would be great, if you could test that.
>>> 
>>> The federation part is trickier and I am still working on it.
>>> If you want to have a look at this, I believe it can follow the same schema as the other configs, look into "modules/dmlite/manifest/xrootd.pp".
>>> 
>>> Cheers
>>> Martin
>>> 
>>> On May 17, 2013, at 11:10 AM, Henrik Öhman <[log in to unmask]> wrote:
>>> 
>>>> Thanks Martin,
>>>> 
>>>> I'll have a look over the weekend!
>>>> 
>>>> Best regards,
>>>> Henrik
>>>> 
>>>> On 17 May 2013 10:52, Martin Philipp Hellmich <[log in to unmask]> wrote:
>>>>> Hi Henrik
>>>>> 
>>>>> the branch to use is 'test'. The punch-modules are the collection of all puppet modules used at CERN.
>>>>> This is where the xrootd module should go in the end, too.
>>>>> 
>>>>> If you look in the folder 'modules', you can find the xrootd and the lcgdm modules.
>>>>> The templates are inside there, too, in a template folder.
>>>>> You can find an example how to use it in a dpm configuration here:
>>>>> https://svnweb.cern.ch/trac/lcgdm/browser/extras/puppet/manifests-testbed
>>>>> 
>>>>> The xrootd manifests are in 'xrootd'. The xrdbase.pp holds all the information.
>>>>> 
>>>>> Hope that helps, please ask if I missed something!
>>>>> 
>>>>> Cheers
>>>>> Martin
>>>>> 
>>>>> 
>>>>> On May 17, 2013, at 10:43 AM, Henrik Öhman <[log in to unmask]>
>>>>> wrote:
>>>>> 
>>>>>> Dear Martin,
>>>>>> 
>>>>>> Thanks for the repo link. I have cloned it, but there is no default
>>>>>> branch (e.g. master), only 'devel' and 'test'. Which one should I use?
>>>>>> 
>>>>>> Further I have no experience with punch-modules - could you tell me
>>>>>> where to start digging? For the ATLAS (US) Tier3 perspective, I'd like
>>>>>> to examine the configuration file templates and also the manifests
>>>>>> responsible for creating the configuration files. Could you give me a
>>>>>> pointer or two?
>>>>>> 
>>>>>> Thanks,
>>>>>> Henrik
>>>>>> 
>>>>>> On 16 May 2013 11:06, Martin Philipp Hellmich <[log in to unmask]> wrote:
>>>>>>> Hi Henrik, Andrea,
>>>>>>> 
>>>>>>> I am very happy to collaborate.
>>>>>>> I have started making an xrootd puppet module, which is general and extensible.
>>>>>>> It now works together with a dpm-xrootd module defining extra variables and parameters and hiding some of the configuration complexity to the user.
>>>>>>> 
>>>>>>> The xrootd part should be invoked through
>>>>>>> class{"xrootd::config":}
>>>>>>> class{"xrootd::install":}
>>>>>>> class{"xrootd::service":}
>>>>>>> plus two functions after config, which create the configuration files:
>>>>>>> create_config{"config_disk":}
>>>>>>> create_config{"config_redir":}
>>>>>>> create_sysconfig{"sysconfig":}
>>>>>>> 
>>>>>>> so in all it looks like this in your manifest:
>>>>>>> class{"xrootd::config":}
>>>>>>> create_config{"config_disk":}
>>>>>>> create_config{"config_redir":}
>>>>>>> create_sysconfig{"sysconfig":}
>>>>>>> class{"xrootd::install":}
>>>>>>> class{"xrootd::service":}
>>>>>>> 
>>>>>>> If you are interested to have a look at the code, checkout the test branch from here:
>>>>>>> [log in to unmask]:./public/repo/punch-modules
>>>>>>> It's the punch module repo with the xrootd and lcgdm::xrootd modules added (and some minor changes throughout so it works without hiera)
>>>>>>> 
>>>>>>> I am happy to help dig through the code and try it!
>>>>>>> 
>>>>>>> Cheers
>>>>>>> Martin
>>>>>>> 
>>>>>>> On May 16, 2013, at 10:00 AM, Henrik Öhman <[log in to unmask]>
>>>>>>> wrote:
>>>>>>> 
>>>>>>>> Dear Fabrizio,
>>>>>>>> 
>>>>>>>> I got this mail through Sergey Panitkin, and I believe I can be of some help. Note that I'm not on the xrootd-l list, so please make sure that my email is among the recipients in your reply.
>>>>>>>> 
>>>>>>>> I have been using puppet to configure xrootd on Google Compute Engine (GCE). In this activity I have based my modules and templates on the ATLAS US Tier3 puppet modules. I am by no means an expert on puppet, but I do have some experience crafting puppet modules and templates for different services. I have some spare time right now, so if you'd like me to take a look at your specific setup let me know.
>>>>>>>> 
>>>>>>>> Best regards,
>>>>>>>> Henrik
>>>>>>>> 
>>>>>>>> 
>>>>>>>> -------- Original Message --------
>>>>>>>> Subject:      Anybody with puppet for xrootd ?
>>>>>>>> Date: Wed, 15 May 2013 16:09:38 +0200
>>>>>>>> From: Fabrizio Furano <[log in to unmask]>
>>>>>>>> To:   xrootd-l <[log in to unmask]>
>>>>>>>> CC:   Martin Philipp Hellmich <[log in to unmask]>, Oliver Keeble <[log in to unmask]>
>>>>>>>> 
>>>>>>>> 
>>>>>>>> Hi xrootd folks,
>>>>>>>> 
>>>>>>>> as DPM team we are planning to invest into puppet for the setup, and
>>>>>>>> of course this would cover also the so-called xrootd plugin, that
>>>>>>>> involves an xrootd setup as a frontend of DPM, plus some DPM-related
>>>>>>>> Xrd* plugins.
>>>>>>>> 
>>>>>>>> The question is... is there anybody who has experience/templates/etc.
>>>>>>>> about setting up xrootd clusters with puppet ? Our idea is to be
>>>>>>>> compatible with existing practices, if any, or, even better, to share
>>>>>>>> material on this.
>>>>>>>> 
>>>>>>>> Thank you!
>>>>>>>> 
>>>>>>>> Fabrizio
>>>>>>>> 
>>>>>>>> ########################################################################
>>>>>>>> Use REPLY-ALL to reply to list
>>>>>>>> 
>>>>>>>> To unsubscribe from the XROOTD-L list, click the following link:
>>>>>>>> 
>>>>>>>> https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1
>>>>>>>> 
>>>>>>> 
>>>>>>> --
>>>>>>> Martin Hellmich                    Information Technology Department
>>>>>>> [log in to unmask]               CERN
>>>>>>> +41 22 76 765 26                 CH-1211 Geneva 23
>>>>>>> 
>>>>> 
>>>>> --
>>>>> Martin Hellmich                    Information Technology Department
>>>>> [log in to unmask]               CERN
>>>>> +41 22 76 765 26                 CH-1211 Geneva 23
>>>>> 
>>> 
>>> --
>>> Martin Hellmich                    Information Technology Department
>>> [log in to unmask]               CERN
>>> +41 22 76 765 26                 CH-1211 Geneva 23
>>> 
>> 
>> --
>> Martin Hellmich                    Information Technology Department
>> [log in to unmask]               CERN
>> +41 22 76 765 26                 CH-1211 Geneva 23
>> 
> <auth_file><xrootd-clustered.cfg><stagein.sh>

--
Martin Hellmich                    Information Technology Department
[log in to unmask]               CERN
+41 22 76 765 26                 CH-1211 Geneva 23


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