[slurm-users] Mocking SLURM to debug job_submit.lua

Renfro, Michael Renfro at tntech.edu
Wed Sep 23 16:34:57 UTC 2020

Not having a separate test environment, I put logic into my job_submit.lua to use either the production settings or the ones under development or testing, based off the UID of the user submitting the job:


function slurm_job_submit(job_desc, part_list, submit_uid)
   test_user_table = {}
   test_user_table[ENTER_USER_UID_HERE] = 'a_username'

   test_enabled = (test_user_table[submit_uid] ~= nil)
   -- test_enabled = false
   if (test_enabled) then -- use logic for testing
      slurm.log_info("testing mode enabled")
      -- call other functions as needed for testing
   else -- use default logic for production
      slurm.log_info("production mode enabled")
      -- call other functions as needed for production
   end -- detect if testing or production

   return slurm.SUCCESS


I can set test_enabled to false if I want to disable testing entirely, otherwise, I can make a table of my test user population. I don't think I've had anyone's production jobs fail when I'm making changes this way, but I'm not 100% certain that a syntax error in functions used in the testing branch would be ignored in the production branch. And I've tried to modularize as much as I can into separate functions outside the slurm_job_submit function.

On 9/23/20, 11:09 AM, "slurm-users on behalf of SJTU" <slurm-users-bounces at lists.schedmd.com on behalf of weijianwen at sjtu.edu.cn> wrote:

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    Modifying and testing  job_submit.lua on a production SLURM system may lead to temporary failure of job submission, which halts new scheduling strategies being applied. Is it possible to mock a SLURM system to debug job_submit.lua so that it can be updated to the production system confidently later?

    Thank you!


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