fix flannel's cross vm networking for vagrant

* set flannel backend type to `host-gw`
* set flannel interface to be eth1 ip

Vagrantfile

@@ -90,7 +90,9 @@ Vagrant.configure("2") do |config|
       ip = "#{$subnet}.#{i+100}"
       host_vars[vm_name] = {
         "ip" => ip,
-        "access_ip" => ip
+        "access_ip" => ip,
+        "flannel_interface" => ip,
+        "flannel_backend_type" => "host-gw"
       }
       config.vm.network :private_network, ip: ip
 

roles/network_plugin/flannel/tasks/main.yml

@@ -4,6 +4,7 @@
     src: network.json
     dest: /etc/flannel-network.json
     backup: yes
+
 - name: Flannel | Create flannel pod manifest
   template:
     src: flannel-pod.yml