Re: [HTCondor-users] X509UserProxy in Singularity

[Matthias Schnepf <matthias.schnepf@xxxxxxx>]

Hello all,

Thank you for fixing this issue so fast! We are now compiling HTCondor ourselves to use the proxy-variable inside our containers. It works well with singularity version 2.2.1, however it does not work for us with singularity version 2.4.5. The offending line appears to be https://github.com/htcondor/htcondor/blob/c1963c45f386ff052f56332aa58099993a769174/src/condor_starter.V6.1/singularity.cpp#L170. The â-Câ in singularity cleans the environment completely and unsets most variables in the container (the behaviour in singularity seem to have changed in the above mentioned versions?). Removing this line and compiling HTCondor again allows us to use the environment variables in the container, especially the x509userproxy.

Cheers, Matthias

On 03/27/2018 09:32 PM, Jaime Frey wrote:

On Mar 27, 2018, at 7:08 AM, Matthias Schnepf <matthias.schnepf@xxxxxxx> wrote:

we try to run vanilla jobs in singularity on an HPC center. The jobs start and the x509userproxy environment is set for the job. However, the variable is e.g. /tmp/condor/execute/dir_1/proxy. We bind mount the executable directory of the job with SINGULARITY_TARGET_DIR = /srv

Inside singularity, the x509userproxy file is under /srv/proxy. The environment variable is still /tmp/condor/execute/dir_1/proxy inside the container. So the x509userproxy environment variable is wrong inside the container.

We use HTCondor version 8.6.2. Do we have to configure something in HTCondor that the x509userproxy variable is set correct inside the singularity container?

This appears to be a bug in HTCondor. When using the SINGULARITY_TARGET_DIR parameter, the condor_starter updates the environment variables it sets for the job that are related to the execute directory to use the location inside the container. X509_USER_PROXY was left out by mistake.

We will fix this in a future release. Iâve made a ticket in our bug tracking system:

https://htcondor-wiki.cs.wisc.edu/index.cgi/tktview?tn=6625

Thanks and regards,

Jaime Frey

UW-Madison HTCondor Project

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