Initial

main.py

@@ -0,0 +1,11 @@
+import json
+
+if __name__ == "__main__":
+
+    FILE = "vms.json"
+    with open(FILE) as f:
+        jsonList = json.load(f)
+        vmList = [ VM(obj) for obj in jsonList ]
+        
+        for vm in vmList:
+            print(vmList.dumpHAProxyComponents())

vm.py

@@ -0,0 +1,49 @@
+import libvirt
+
+HA_PROXY_TEMPLATE = '''
+listen {name}
+    bind 0.0.0.0:{port}
+    mode {proto}
+    timeout connect 4000
+    timeout client  180000
+    timeout client  180000
+    server srv1 {ip}
+'''
+
+class VM:
+
+    def __init__(self, args):
+
+        self.hostname = args.get("hostname")
+        self.subdomains = args.get("subdomains")
+        self.ports = args.get("ports")
+        self.network = args.get("network") or "default"
+        self.lease = _get_lease_for_hostname()
+        self.ip = lease.get("ipaddr")
+
+    def _get_lease_for_hostname(self):
+        
+        with libvirt.open() as con:
+            network = con.networkLookupByName(self.network)
+            leases = network.DHCPLeases()
+            for l in leases:
+                if l.get("hostname") == self.hostname:
+                    return l
+        
+        raise ValueError("Hostname {} doesn't have a DHCP lease".format(self.hostname))
+
+    def dumpHAProxyComponents(self):
+            
+        components = []
+        for pObj in self.ports:
+            name = str(pObj.get("name")).replace(" ", "")
+            portOrRange = pObj.get("port").replace(" ", "")
+            proto = pObj.get("proto") or "tcp"
+            compositeName = "-".join((self.hostname, name, portOrRange, proto))
+
+            component = HA_PROXY_TEMPLATE.format(name=compositeName, port=port,
+                                                 proto=proto, ip=self.ip)
+            components.append(component)
+
+        return components
+