---
- name: Test CPU cgroup enforcement on gpu01
  hosts: slurm_controller
  become: true
  gather_facts: false

  tasks:
    - name: Submit cgroup CPU test to gpu01
      ansible.builtin.shell: |
        set -euo pipefail

        job_id="$(
          sudo -iu slurmuser sbatch --parsable <<'SBATCH'
        #!/bin/bash
        #SBATCH --job-name=cgroup-cpu-test
        #SBATCH --partition=all
        #SBATCH --nodelist=gpu01
        #SBATCH --cpus-per-task=2
        #SBATCH --mem=1G
        #SBATCH --time=00:02:00
        #SBATCH --output=/shared/cgroup-cpu-test-%j.out

        echo "HOST=$(hostname)"
        echo "SLURM_JOB_ID=$SLURM_JOB_ID"
        echo "SLURM_JOB_NODELIST=$SLURM_JOB_NODELIST"
        echo "SLURM_CPUS_PER_TASK=${SLURM_CPUS_PER_TASK:-}"
        echo "CPUS_ALLOWED=$(grep Cpus_allowed_list /proc/self/status)"
        echo "MEM_ALLOWED=$(grep Mems_allowed_list /proc/self/status || true)"
        echo
        echo "### cgroup"
        cat /proc/self/cgroup
        echo
        echo "### mounted cgroups"
        mount | grep cgroup || true
        sleep 5
        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/cgroup-cpu-test-${job_id}.out"
      args:
        executable: /bin/bash
      register: cgroup_cpu_result
      changed_when: true

    - name: Show cgroup CPU result
      ansible.builtin.debug:
        var: cgroup_cpu_result.stdout_lines