apptainer

When trying to debug a CI failure in a specific compiler configuration, it can be useful to do so with the same docker/singularity/apptainer image that the CI uses. Docker can be used on local machines, while the LDG headnodes provide apptainer.

The basic call to run with a certain image is apptainer shell docker://igwn/lalsuite-dev-gcc:7 with the last bit replaced to match the compiler you want.

Once inside the instance, you should be able to see your homedir, navigate into a lalsuite checkout and configure&compile it as normal.

On ldas-grid at least, the default configuration may (as of Feb 2024) fail to build lalsuite inside an instance of such an image, because .00boot tries to access a temp directory on /local/ which is not available. Possible workarounds include:

• apptainer shell -e docker://igwn/lalsuite-dev-gcc:7 to avoid passing through any environment variables
• unset TMPDIR && apptainer shell docker://igwn/lalsuite-dev-gcc:7 to just drop the one problemativ variable
• apptainer shell --bind /local:/local docker://igwn/lalsuite-dev-gcc:7 if yo need /local/ or other purposes, too