[HTCondor-users] Missing files in /tmp of a docker job

[Jacek Kominek <jkominek@xxxxxxxx>]

Hi,
I am currently trying to get a docker image to run on our local cluster 
which is running HTCondor (v8.8.5, if that matters). As part of the 
dockerfile some files get ADDed into "/tmp" inside the container. If I 
just run it directly on my local machine - the files are sitting there 
all nice and dandy, but when I try to run this same very image as a 
condor job, the "/tmp" directory is empty, as is the ./tmp subdir in the 
condor scratch folder. If I change the dockerfile and move the files 
into "/opt" rather than "/tmp", the docker job works just fine and the 
files are there all good. I am not very particular about the "/tmp" 
location, but it got me wondering if there is something I am missing 
here and if this folder perhaps gets cleaned out by default and it 
should be avoided in docker jobs? Thank you for a clarification in this 
regard,

Best Regards,

-Jacek K.

--
Jacek Kominek, PhD
University of Wisconsin-Madison
1552 University Avenue, Wisconsin Energy Institute 4154
Madison, WI  53726-4084, USA
jkominek@xxxxxxxx