---
- name: Test GPU access without GRES allocation
  hosts: slurm_controller
  become: true
  gather_facts: false

  tasks:
    - name: Submit job to gpu01 without requesting GPU
      ansible.builtin.shell: |
        set -euo pipefail

        job_id="$(
          sudo -iu slurmuser sbatch --parsable <<'SBATCH'
        #!/bin/bash
        #SBATCH --job-name=gpu-deny-test
        #SBATCH --partition=all
        #SBATCH --nodelist=gpu01
        #SBATCH --cpus-per-task=1
        #SBATCH --mem=1G
        #SBATCH --time=00:02:00
        #SBATCH --output=/shared/gpu-deny-test-%j.out

        echo "HOST=$(hostname)"
        echo "SLURM_JOB_ID=$SLURM_JOB_ID"
        echo "SLURM_JOB_NODELIST=$SLURM_JOB_NODELIST"
        echo "SLURM_JOB_GPUS=${SLURM_JOB_GPUS:-}"
        echo "CUDA_VISIBLE_DEVICES=${CUDA_VISIBLE_DEVICES:-}"
        echo "CPUS_ALLOWED=$(grep Cpus_allowed_list /proc/self/status)"
        echo
        echo "### ls nvidia devices"
        ls -l /dev/nvidia* 2>&1 || true
        echo
        echo "### nvidia-smi without GRES"
        nvidia-smi 2>&1 || true
        SBATCH
        )"

        echo "JOB_ID=$job_id"

        for i in $(seq 1 60); do
          if sudo -iu slurmuser squeue -h -j "$job_id" | grep -q .; then
            sudo -iu slurmuser squeue -j "$job_id"
            sleep 1
          else
            break
          fi
        done

        echo "### output"
        cat "/shared/gpu-deny-test-${job_id}.out"
      args:
        executable: /bin/bash
      register: gpu_deny_result
      changed_when: true

    - name: Show GPU deny test result
      ansible.builtin.debug:
        var: gpu_deny_result.stdout_lines