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XROOTD-L  August 2011

XROOTD-L August 2011

Subject:

Re: using 'sec.protocol pwd' hangs for me...

From:

Gerardo Ganis <[log in to unmask]>

Date:

22 Aug 2011 20:53:27 +0200Mon, 22 Aug 2011 20:53:27 +0200

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text/plain

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text/plain (108 lines)


    Hi Jimmy,

    I should have fixed this in the HEAD.
    Are you in the position to try out?

    Gerri


On 8/11/11 7:48 PM, Jimmy Tang wrote:
> Hi All
>
> Just to give you some background, I am currently evaluating xrootd as a potential high speed scratch disk and datastore for our site. but we do not wish to use GSI or kerberos based authentication. The pwd authentication method seems to adequate for our needs.
>
> I've setup a small two node toy cluster with this sample config
>
> #start config
> xrd.protocol xrootd *
> xrd.port 1094
> xrd.allow host *.tchpc.tcd.ie
>
> all.export /tmp/data
> #oss.localroot /tmp
>
> if manager.tchpc.tcd.ie
> all.role manager
> else
> all.role server
> xrootd.seclib libXrdSec.so
> sec.protocol pwd -d:3 -dir:/home/jtang/.xrd/  -a:1
> #sec.protocol unix
> #sec.protocol sss
> ofs.authorize 1
> acc.authdb /home/jtang/Authfile
> fi
>
> all.manager manager.tchpc.tcd.ie 1213
>
> cms.allow host *.tchpc.tcd.ie
> # end config
>
> I've followed the instructions at http://xrootd.slac.stanford.edu/doc/prod/sec_config.htm#_Toc248670305 but i seem to be at a loss. My small toy system doesnt seem to start up. My manager node appears to be fine, but the xrootd on my 'slave' where i have my /tmp disk which i want to export displays this type of message
>
>
> =====>  xrootd.seclib libXrdSec.so
> Config exporting /tmp/data
> 110811 18:34:35 001 XrootdProtocol: Loading security library libXrdSec.so
> ++++++ Authentication system initialization started.
> 110811 18:34:35 001 secpwd_Init: using infodir: /home/jtang/.xrd/
> 110811 18:34:35 001 sut_Cache::Init: cache allocated for 4 entries
> 110811 18:34:35 001 sut_Cache::Rehash: Hash table updated (found 0 active entries)
> 110811 18:34:35 001 sut_Cache::Load: PF file /home/jtang/.xrd/pwdadmin loaded in cache (found 4 entries)
> 110811 18:34:35 001 sut_Cache::Rehash: Adding ID: +++SrvID; key: 0
> 110811 18:34:35 001 sut_Cache::Rehash: Adding ID: +++SrvPuk_1; key: 1
> 110811 18:34:35 001 sut_Cache::Rehash: Adding ID: +++SrvEmail; key: 2
> 110811 18:34:35 001 sut_Cache::Rehash: Adding ID: –host_1; key: 3
> 110811 18:34:35 001 sut_Cache::Rehash: Hash table updated (found 4 active entries)
> 110811 18:34:35 001 sut_Cache::Dump: //-----------------------------------------------------
> 110811 18:34:35 001 sut_Cache::Dump: //
> 110811 18:34:35 001 sut_Cache::Dump: //  Capacity:         4
> 110811 18:34:35 001 sut_Cache::Dump: //  Max index filled: 3
> 110811 18:34:35 001 sut_Cache::Dump: //
> 110811 18:34:35 001 sut_Cache::Dump: // #:1  st:4 cn:1  buf:6,0,0,0 mod:11Aug2011:18:30:24 name:+++SrvID
> 110811 18:34:35 001 sut_Cache::Dump: // #:2  st:4 cn:2  buf:126,0,0,0 mod:11Aug2011:18:30:24 name:+++SrvPuk_1
> 110811 18:34:35 001 sut_Cache::Dump: // #:3  st:4 cn:1  buf:19,0,0,0 mod:11Aug2011:18:30:24 name:+++SrvEmail
> 110811 18:34:35 001 sut_Cache::Dump: // #:4  st:2 cn:0  buf:8,24,0,0 mod:11Aug2011:18:30:46 name:–host_1
> 110811 18:34:35 001 sut_Cache::Dump: //
> 110811 18:34:35 001 sut_Cache::Dump: //-----------------------------------------------------
> 110811 18:34:35 001 sut_Cache::Get: locating entry for ID: +++SrvID
>
>
> it just seems to hang and never connects to my cmsd on the slave node. I was wondering do I need to keep the pwdadmin file/directory on a local disk such that I need to run
>
> xrdpwdadmin  add –host  master.tchpc.tcd.ie -email [log in to unmask]
> xrdpwdadmin  add –host  slave.tchpc.tcd.ie -email [log in to unmask]
>
> on the respective hosts? Also, in the manual "xrdpwdadmin  add usertag" is shown as an example, is this just an arbitrary name that i can select for this user or is it more specific such as "user@host" that they are initially coming from? With the above setup and log message from xrootd, i tried logging in with a client from a third machine, but i can never see the /tmp/data share as it hangs. if i comment out the following my toy system works as a completely open system which is not what i want.
>
> xrootd.seclib libXrdSec.so
> sec.protocol pwd -d:3 -dir:/home/jtang/.xrd/  -a:1
> ofs.authorize 1
> acc.authdb /home/jtang/Authfile
>
>
> My end goal is to setup a /site/scratch where i would create a rule for each user for their own personal space, and a /site/archive where there would be restricted read only access to parts of the filesytem. It seems to me that xrootd would be able to do what I want, I just don't know if I am headed in the right direction or not with my test configs, I would assume my use case isn't a typical one as I am not intending to use for HEP applications, but more for general HPC type activities.
>
>
> Regards,
> Jimmy Tang
>
> --
> Trinity Centre for High Performance Computing,
> Lloyd Building, Trinity College Dublin, Dublin 2, Ireland.
> http://www.tchpc.tcd.ie/
>
>


-- 
+--------------------------------------------------------------------------+
   Gerardo GANIS    CERN, PH Dept, SFT group, CH 1211 Geneve 23
                    room: 32-RC-017, tel: +41 22 7676439
                    email: [log in to unmask], fax: +41 22 7669133
+--------------------------------------------------------------------------+



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