def create_nodeset_placement_groups()

in ansible/roles/slurm/files/scripts/resume.py [0:0]

• 58 lines of code
• 18 McCabe index (conditional complexity)

def create_nodeset_placement_groups(node_list: list, job_id=0):
    model = next(iter(node_list))
    nodeset = lkp.node_nodeset(model)
    if not nodeset.enable_placement:
        return {None: node_list}
    if not valid_placement_nodes(node_list):
        return {None: node_list}
    region = lkp.node_region(model)

    groups = {
        f"{cfg.slurm_cluster_name}-{nodeset.nodeset_name}-{job_id}-{i}": nodes
        for i, nodes in enumerate(chunked(node_list, n=PLACEMENT_MAX_CNT))
    }

    if log.isEnabledFor(logging.DEBUG):
        debug_groups = {
            group: to_hostlist_fast(nodes) for group, nodes in groups.items()
        }
        log.debug(
            f"creating {len(groups)} placement groups: \n{yaml.safe_dump(debug_groups).rstrip()}"
        )
    requests = {
        group: create_placement_request(group, region)
        for group, incl_nodes in groups.items()
    }
    ops = dict(
        zip(requests.keys(), map_with_futures(ensure_execute, requests.values()))
    )

    def classify_result(item):
        op = item[1]
        if not isinstance(op, Exception):
            return "submitted"
        if all(e.get("reason") == "alreadyExists" for e in op.error_details):
            return "redundant"
        return "failed"

    grouped_ops = dict(util.groupby_unsorted(list(ops.items()), classify_result))
    submitted, redundant, failed = (
        dict(grouped_ops.get(key, {})) for key in ("submitted", "redundant", "failed")
    )
    if redundant:
        log.warning(
            "placement policies already exist: {}".format(",".join(redundant.keys()))
        )
    if failed:
        reqs = [f"{e}" for _, e in failed.values()]
        log.fatal("failed to create placement policies: {}".format("; ".join(reqs)))
    operations = {group: wait_for_operation(op) for group, op in submitted.items()}
    for group, op in operations.items():
        if "error" in op:
            msg = "; ".join(
                f"{err['code']}: {err['message'] if 'message' in err else 'no message'}"
                for err in op["error"]["errors"]
            )
            log.error(
                f"placement group failed to create: '{group}' ({op['name']}): {msg}"
            )

    log.info(
        f"created {len(operations)} placement groups ({to_hostlist_fast(operations.keys())})"
    )
    return groups