EOS Server and Client

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1

Hello, I’ve a very dumb question about the difference between eos server and eos client.
I’m starting a test case using only one node first to learn lessons and then plan my environment, but my test machine is a Ubuntu 22.04 and seems that the server must be a CentOS.
I understand that I need a Server+Client on this machine and than I can have only the client side on other machines, is that correct?

Thanks
Wander

2

Hi Wander,

We build the eos client which includes the eos client console and the fuse daemon also for the Ubuntu distribution but we don’t do this for the eos-server package which includes (MGM, FST, MQ daemons) and neither for the eos-quakrdb. The reason for this is that all our infrastructure is RHEL based and there are quite a few dependencies that also need to be build for the server part to work properly.

Therefore, my suggestion would be to use docker containers with CentOS7 as a base image and experiment inside a container rather than on the host machine which from what I understand is Ubuntu. The performance penalty is negligible for the vast majority of real world use-cases.

You can use an already prepared image if you have access to the CERN Gitlab Registry:
docker pull gitlab-registry.cern.ch/dss/eos/eos-ci:5.1.29

Hope this helps!

Cheers,
Elvin

3

Hi Elvin,

Thanks for the explanation. I got it.
Since I have 2 SSD’s and 2 HDD’s on my machine, I built a dual boot on the SSD’s, one with the original Ubuntu 22.04 and a new one with CentOS-9-Stream and used one HDD for each system.
Tested and it’s working fine!
Now I’ll proceed with my EOS Server (MGM, MQ and FST) and as soon as I have this working, I’ll install the client only in another machine.

Thanks!

Cheers,
Wander