Implement isolated network ports

Requires Ubuntu 22.04 (or more specifically, LibVirt 6.1+)

Author: Complete and Absolute Nonsense

cloudvirt/config.py

@@ -138,6 +138,17 @@ def _parse_vmspec(self):
         except KeyError:
             pass
 
+        try:
+            if vmspec_yaml["isolated_port"] is None:
+                self.logger.error("isolated_port cannot be specified then left blank")
+
+                if type(vmspec_yaml["isolated_port"]).__name__ != "bool":
+                    self.logger.error("isolated port should be a bool.")
+
+                self.vmspec.isolated_port = vmspec_yaml["isolated_port"]
+        except KeyError:
+            pass
+
     def _parse_userspec(self):
         # - - load yaml - - #
         if not self.userspec_file:

cloudvirt/driver.py

@@ -346,6 +346,12 @@ def _gen_dom(self):
         ET.SubElement(domxml_dev_iface, "mac", {"address": self.vmspec.mac_addr})
         ET.SubElement(domxml_dev_iface, "model", {"type": "virtio"})
 
+        if self.vmspec.isolated_port is not None:
+            isolated_opt = "no"
+            if self.vmspec.isolated_port is True:
+                isolated_opt = "yes"
+            ET.SubElement(domxml_dev_iface, "port", {"isolated": isolated_opt})
+
         ET.SubElement(domxml_dev, "serial", {"type": "pty"})
 
         domxml = ET.tostring(domxml_root, encoding="unicode")

cloudvirt/spec.py

@@ -11,6 +11,7 @@ def __init__(self):
         self.ip = None
         self.gateway = None
         self.bridge_pfxlen = None
+        self.isolated_port = None
 
         # storage
         self.vol_pool = None