LHC@home

I got some cloud VMs and want to contribute to the project, but the native applications always fail, and I couldn't fix it. I am wondering how can I setup VirtualBox with LHC. I did simply `sudo apt install virtualbox -y`, is that all?

Some of your computers have only 7.77 GB RAM, others less than 1 GB.
To run ATLAS 16 GB should be the minimum.

ATLAS native requires a local CVMFS client and apptainer (former known as singularity) to be installed.
This is from your logfiles:

[2022-04-01 22:45:25] Checking for CVMFS
[2022-04-01 22:45:25] No cvmfs_config command found, will try listing directly
[2022-04-01 22:45:25] ls: cannot access '/cvmfs/atlas.cern.ch/repo/sw': No such file or directory
[2022-04-01 22:45:25] Failed to list /cvmfs/atlas.cern.ch/repo/sw
[2022-04-01 22:45:25] ** It looks like CVMFS is not installed on this host.

CVMFS needs to be installed and configured correctly.
See the advice given here:
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=4840
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=5594
https://lhcathome.cern.ch/lhcathome/forum_thread.php?id=5595

I got some cloud VMs and want to contribute to the project, but the native applications always fail, and I couldn't fix it. I am wondering how can I setup VirtualBox with LHC.

As these are already VMs, I doubt Virtualbox will run correctly inside them. Never tried it though.

I did simply `sudo apt install virtualbox -y`, is that all?

Answering the subject line, my old notes for CentOS7/8 (Minimal install) say:

VBox needs gcc, make, elfutils-libelf-devel, kernel-devel and kernel-headers; not a dependency in the RPM. May also need: setools-libs libsemanage-python


yum install gcc make elfutils-libelf-devel kernel-devel  kernel-headers setools-libs libsemanage-python libseccomp


Install the downloaded VirtualBox RPM:


yum localinstall VBox-version.RPM


user running BOINCmust be in VBox group:


usermod --append --groups vboxusers boinc


Rebuild the kernel modules:


vboxconfig


Start VBox services:


service vboxautostart-service start
service vboxdrv restart


Optional:


VBoxManage extpack install /tmp/Oracle_VM_VirtualBox_Extension_Pack-version.vbox-extpack

All as root, via SSH. That should should give a working VirtualBox testable by restarting the BOINC client.
If working, remember to chkconfig the services on before rebooting.
When updating the kernel, remember to re-run vboxconfig to build the new modules before rebooting.

Other useful bits:

VBoxManage list extpacks

VBoxManage list vms
VBoxManage showvminfo 1e6cf289-3176-476f-b80c-6fa3fbe42922
VBoxManage unregistervm 1e6cf289-3176-476f-b80c-6fa3fbe42922 --delete

Distro-specific and SysV-to-systemd translation left as an exercise for the reader.

Note that I've not tested this in a couple of years as I don't have any suitable machine at the moment. Any problems see Yeti's Checklist

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