Using rucio and grid on SWAN

Software
1

Dear experts,

I would like to develop on SWAN a notebook which uses rucio API client, so I should do several settings and I don’t know how.
If working on lxplus I would

  • setupATLAS
  • lsetup rucio
  • voms-proxy-init -voms atlas -valid=96:00

Then I can edit my python script and importing all I need. I would prefer doing it on notebook since it allows me to be faster with some checks. Do you think it’s possible?

Thanks for the attention.

Best regards,
Francesco

2

Dear Francesco,

Do you know what needs to be installed (and is installed on lxplus) for you to do the setupATLAS and lsetup rucio steps? The voms-proxy-init command should be already doable now (you can give it a try).

Perhaps some other ATLAS colleague managed to do this before?

We developed together with some ATLAS colleagues a Rucio extension for SWAN, but it’s not yet available. I’ll check with them about this.

3

I got this from an ATLAS colleague:

  • The user can just do pip install --user rucio-clients and when instantiating do:
from rucio.client import Client
c = Client(rucio_host='https://rucio-lb-prod.cern.ch:443', auth_host='https://rucio-auth-prod.cern.ch:443')
res = c.whoami()
res = c.list_dids(...
res = c.list_replicas(...`
4

Dear Enric,

thanks for the prompt reply! setupATLAS is only an alias which execute an initial script which set a configuration for ATLAS users, but it could be avoided if I could manage to setup grid and rucio.

  • For this voms-proxy-init -voms atlas -valid=96:00 I got an error, “No credentials found”, I think that I should pass the grid keys?
  • I installed rucio, but has some problems, also for a simple ping test I got “RuntimeError: Could not load Rucio configuration file. Rucio looked in the following paths for a configuration file, in order:
    /opt/rucio/etc/rucio.cfg”

Cheers,
Francesco

5
  • For this voms-proxy-init -voms atlas -valid=96:00 I got an error, “No credentials found”, I think that I should pass the grid keys?

I think you need to have your main grid certificate placed somewhere in SWAN (e.g. in your CERNBox) to be able to generate the proxy, right?

I installed rucio, but has some problems, also for a simple ping test I got “RuntimeError: Could not load Rucio configuration file. Rucio looked in the following paths for a configuration file, in order:
/opt/rucio/etc/rucio.cfg”

Is that configuration file somewhere on lxplus? Can you take it from there and make it available in SWAN (e.g. put it on your CERNBox, and point Rucio to it?).