napalm_qnap_qts/qnap_qts.py

@@ -68,6 +68,12 @@ class QnapQtsDriver(StorageDriver, HypervisorDriver, LinuxDriver):
     driver_name = "qnap_qts"
     NETMIKO_DEVICE_TYPE = "linux"
 
+    #: QTS has no systemd, so the systemctl actions LinuxDriver inherits from
+    #: napalm-device-types' SystemdServicesMixin would fail on every unit. None
+    #: makes every "can it control services?" check -- is ``manage_service``
+    #: callable -- answer no, rather than offering buttons that cannot work.
+    manage_service = None  # type: ignore[assignment]
+
     SNMP_OBJECT_ID_PREFIX = QNAP_ENTERPRISE_OID
     SNMP_FINGERPRINT = [
         FingerprintRule("qnap", weight=9.0),

tests/test_qnap_qts.py

@@ -182,3 +182,13 @@ class TestDockerBinDiscovery:
     def test_docker_bin_hook_returns_the_discovered_path(self, driver):
         driver._docker_path = "/opt/docker"
         assert driver._docker_bin() == "/opt/docker"
+
+
+def test_services_cannot_be_controlled():
+    """QTS has no systemd: the systemctl actions inherited from LinuxDriver would
+    fail on every unit, so the driver says it cannot control services at all --
+    which is what every capability check asks (is ``manage_service`` callable?)."""
+    from napalm_linux.linux import LinuxDriver
+
+    assert callable(getattr(LinuxDriver, "manage_service", None))
+    assert not callable(getattr(QnapQtsDriver, "manage_service", None))