Development for LHC@home

PS C:\WINDOWS\system32> wsl.exe -d Ubuntu
maeax@THREAD3995:/mnt/c/WINDOWS/system32$ cd slots/99
-bash: cd: slots/99: No such file or directory
maeax@THREAD3995:/mnt/c/WINDOWS/system32$

-----
maeax@THREAD3995:/mnt/c/WINDOWS/system32$ podman build -t test .
Error: no Containerfile or Dockerfile specified or found in context directory, /mnt/c/WINDOWS/system32: no such file or directory
maeax@THREAD3995:/mnt/c/WINDOWS/system32$

cd /mnt/c/ProgramData/BOINC/slots/99

maeax@THREAD3995:/mnt/c/WINDOWS/system32$ podman build -t test .
Error: no Containerfile or Dockerfile specified or found in context directory, /mnt/c/WINDOWS/system32: no such file or directory
maeax@THREAD3995:/mnt/c/WINDOWS/system32$

Same here!

In reply to Laurence CERN's message of 20 Mar 2025:

cd /mnt/c/ProgramData/BOINC/slots/99

PS C:\WINDOWS\system32> wsl.exe -d Ubuntu
maeax@THREAD3995:/mnt/c/WINDOWS/system32$ cd /mnt/c/ProgramData/BOINC/slots/99
maeax@THREAD3995:/mnt/c/ProgramData/BOINC/slots/99$

---------------------
PS C:\WINDOWS\system32> wsl.exe -d Ubuntu
maeax@THREAD3995:/mnt/c/WINDOWS/system32$ cd /mnt/c/ProgramData/BOINC/slots/99
maeax@THREAD3995:/mnt/c/ProgramData/BOINC/slots/99$ podman build -t test .
WARN[0000] "/" is not a shared mount, this could cause issues or missing mounts with rootless containers
Error: no Containerfile or Dockerfile specified or found in context directory, /mnt/c/ProgramData/BOINC/slots/99: no such file or directory
maeax@THREAD3995:/mnt/c/ProgramData/BOINC/slots/99$

Here are the commands to run .

C:\Users\boinc>wsl
mkdir /mnt/c/ProgramData/BOINC/slots/99
cd /mnt/c/ProgramData/BOINC/
cp projects/lhcathomedev.cern.ch_lhcathome-dev/* slots/99
cd slots/99
ln -s Dockerfile_20_03_2025 Dockerfile
ln -s entrypoint_20_03_2025.sh entrypoint.sh
podman build -t test .
podman run --cap-add=SYS_ADMIN --device /dev/fuse -v ./:/boinc_slot_dir test

I'm missing the following points:

1. Advice to create subuids and subgids.
See:
https://github.com/containers/podman/blob/main/docs/tutorials/rootless_tutorial.md#etcsubuid-and-etcsubgid-configuration

2. Advice to install and configure CVMFS and autofs on the host
This saves lots of network traffic and disk space since a single CVMFS instance can provide data for many containers.

3. The test 'run' command should look like this:

podman run -it --rm -v /cvmfs:/cvmfs:shared -v ./:/boinc_slot_dir test

'--rm' ensures a container is removed automatically after it's finished.

--cap-add=SYS_ADMIN --device /dev/fuse should both be avoided.
They are not required if CVMFS is correctly set up.