Move virthost from a task to a role.

Setup a variable for hosts we want nested virt enabled on (default false)
add task to setup that on ones we want

inventory/group_vars/all

@@ -3,6 +3,9 @@ freezes: true
 # most of our systems are in phx2
 datacenter: phx2
 
+# usually we do not want to enable nested virt, only on some virthosts
+nested: false
+
 # most of our systems are 64bit. 
 # Used to install various nagios scripts and the like.
 libdir: /usr/lib64

inventory/host_vars/virthost-comm03.qa.fedoraproject.org

@@ -1,3 +1,4 @@
 ---
 # This virthost only has non release critical instances, so it doesn't freeze
 freezes: false
+nested: true

inventory/host_vars/virthost-comm04.qa.fedoraproject.org

@@ -1,3 +1,4 @@
 ---
 # This virthost only has non release critical instances, so it doesn't freeze
 freezes: false
+nested: true

playbooks/groups/virthost.yml

@@ -23,12 +23,12 @@
   - { role: iscsi_client, when: datacenter == "phx2" }
   - sudo
   - { role: openvpn/client, when: datacenter != "phx2" }
+  - virthost
 
   tasks:
   - include: "{{ tasks }}/yumrepos.yml"
   - include: "{{ tasks }}/2fa_client.yml"
   - include: "{{ tasks }}/motd.yml"
-  - include: "{{ tasks }}/virthost.yml"
 
   handlers:
   - include: "{{ handlers }}/restart_services.yml"

roles/virthost/files/kvm_intel.conf

@@ -0,0 +1 @@
+nested=1

roles/virthost/tasks/main.yml

@@ -51,3 +51,11 @@
   tags:
   - config
   when: ansible_distribution == 'RedHat' and ansible_distribution_major_version|int == 7
+
+#
+# Some virthosts we want to use nested virt (a tech preview in rhel 7.2)
+# We need this module option set and then need to tweak the libvirt xml to enable it
+#
+- name: setup nested virt on virthosts with nested=true variable
+  copy: src=kvm_intel.conf dest=/etc/modprobe.d/kvm_intel.conf
+  when: nested is true