network, pillar: fix vxlan interface, add network.sls pillar file

pillar/network.sls

+network:
+  if_name: eth0
+  vxlan_name: circle-vxlan
+  vxlan_id: 42
+  vxlan_port: 
+    port: 4789
+    proto: udp  # do not change!

pillar/top.sls

@@ -11,5 +11,6 @@ base:
     - firewall
     - manager
     - common
+    - network
     - installer
     - ports

salt/network/init.sls

@@ -6,16 +6,22 @@ ovs-bridge:
   openvswitch_bridge.present:
     - name: cloud
 
+{% set net = pillar["network"] %}
+circle-vxlan-if:
+  cmd.run:
+    - name: >
+        ip link add {{ net["vxlan_name"] }} type vxlan id {{ net["vxlan_id"] }} group 239.1.1.1 dev {{ net["if_name"] }} dstport {{ net["vxlan_port"]["port"] }} ;
+        ip link set {{ net["vxlan_name"] }} up
+    - unless: ip link show {{ net["vxlan_name"] }} | grep "{{ net["vxlan_name"] }}"
+
 circle-vxlan:
   openvswitch_port.present:
+    - name: {{ net["vxlan_name"] }}
     - bridge: cloud
-    - type: vxlan
-    - id: 42
-    - remote: 239.1.1.1
-    - dst_port: 4789
     - require:
       - openvswitch_bridge: ovs-bridge
       - pkg: bind-utils
+      - cmd: circle-vxlan-if
 
 {% if grains['os_family'] == 'RedHat' %}
 net_config: