Yes, you can retrieve Slurm job environment variables in several ways, depending on your needs and the context of your job. Here’s how you can do it:

1. Using scontrol

You can use the scontrol command to inspect the environment variables of a running or completed Slurm job:

scontrol show job <job_id> --oneliner

This will output a long line containing all the job details, including the environment variables if they were set.

To specifically see the environment variables, you can use:

scontrol show job <job_id> | grep Environment

2. Using srun with --export

If you want to pass environment variables to a Slurm job, you can use the --export option with srun or sbatch:

srun --export=ALL,MY_VAR=value your_command

This will export all current environment variables and also set MY_VAR for the job.

To retrieve the environment variables from within the job, you can use:

printenv

or

env

inside your job script.

3. Using sacct

For completed jobs, you can use sacct to see job details, though it may not always show environment variables directly:

sacct -j <job_id> --format=JobID,JobName,Env

4. Using sbatch with Environment Variables

If you submit a job using sbatch, you can pass environment variables in the submission script:

#!/bin/bash
#SBATCH --job-name=my_job
#SBATCH --export=ALL,MY_VAR=value

echo "MY_VAR is: $MY_VAR"

5. Using scontrol to View Environment at Runtime

If you want to check the environment variables of a running job, you can use:

scontrol show job <job_id> | grep -i env

6. Using srun to View Environment

If you want to see the environment variables of a running job, you can use:

srun --jobid=<job_id> env