Fix Discovery provisioning tests

Author: archanaserver

pytest_fixtures/core/broker.py

@@ -5,6 +5,7 @@
 import pytest
 
 from robottelo.config import settings
+from robottelo.enums import NetworkType
 from robottelo.exceptions import ContentHostError
 from robottelo.hosts import Satellite, lru_sat_ready_rhel
 
@@ -89,6 +90,11 @@ def module_discovery_sat(
     # Build PXE default template to get default PXE file
     sat.api.ProvisioningTemplate().build_pxe_default()
 
+    # Clear stale DHCP leases and restart dhcpd to pick up new PXE configuration
+    if sat.network_type == NetworkType.IPV4:
+        assert sat.execute('cat /dev/null > /var/lib/dhcpd/dhcpd.leases').status == 0
+        assert sat.execute('systemctl restart dhcpd').status == 0
+
     # Update discovery taxonomies settings
     discovery_loc = sat.api.Setting().search(query={'search': 'name=discovery_location'})[0]
     discovery_loc.value = module_location.name