INNER CODE UNIT · Python

check_reactor_can_read_drbd

LINBIT/linstor-server · scripts/linstor-controller-ha-setup.py:355

def check_reactor_can_read_drbd():
    """drbd-reactor drives the promoter off 'drbdsetup status --json'. When
    drbd-utils is too old for the installed reactor, that output cannot be
    deserialized and reactor just logs 'IGNORING resource ...' — the promoter
    then never fails over, with nothing obviously broken. Warn (not fail): the
    exact version pairing is not something this script can rule on."""
    try:
        resources = json.loads(out(["drbdsetup", "status", "--json"]))
    except Exception:
        print("WARNING: 'drbdsetup status --json' did not return usable JSON. "
              "drbd-reactor needs it to track the resource; check that "
              "drbd-utils and drbd-reactor versions fit together.")
        return
    needed = {"name", "role", "devices", "connections"}
    for res in resources:
        if not needed.issubset(res.keys()):
            print("WARNING: 'drbdsetup status --json' is missing fields "
                  + ", ".join(sorted(needed - set(res.keys())))

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