openqa/worker: try setting up GRE tunnels between worker hosts

everyone stand back, this one's gonna go boom.

roles/openqa/worker/tasks/main.yml

@@ -74,6 +74,15 @@
   tags:
   - config
 
+- name: openvswitch gre tunnel config
+  template: src=ifcfg-gre.j2 dest=/etc/sysconfig/network-scripts/ifcfg-gre{{ item.0 }} owner=root group=root mode=0644
+  with_indexed_items: "{{ groups.openqa-workers|difference([inventory_hostname]) }}"
+  when: deployment_type == 'prod'
+  notify:
+  - restart network
+  tags:
+  - config
+
 - name: Install ifup-pre-local script to create tap devices
   copy: src=ifup-pre-local dest=/sbin/ifup-pre-local owner=root group=root mode=0755
 

roles/openqa/worker/templates/ifcfg-gre.j2

@@ -0,0 +1,7 @@
+DEVICETYPE='ovs'
+TYPE='OVSTunnel'
+OVS_BRIDGE='br0'
+DEVICE='gre{{ item.0 }}'
+OVS_TUNNEL_TYPE='gre'
+OVS_TUNNEL_OPTIONS="options:remote_ip={{ hostvars[item.1][eth0_ip] }}'
+ONBOOT='yes'