roles/vmhost: Configure libvirtd+QEMU

The *vmhost* role installs and configures the libvirt daemon to host
QEMU/KVM virtual machines.

roles/vmhost/tasks/main.yml

@@ -0,0 +1,63 @@
+- name: ensure required packages are installed
+  package:
+    name={{ vmhost_required_packages|join(',') }}
+    state=present
+  tags:
+  - install
+
+- name: ensure libvirtd is configured
+  template:
+    src=libvirtd.conf.j2
+    dest=/etc/libvirt/libvirtd.conf
+    mode=0644
+
+- name: ensure libvirt can use nfs
+  seboolean:
+    name=virt_use_nfs
+    state=yes
+    persistent=yes
+
+- name: ensure libvirt runtime configuration directories exists
+  file:
+    path=/var/lib/libvirt/config/{{ item }}
+    mode=0700
+    state=directory
+  with_items:
+  - qemu
+  - storage
+- name: ensure libvirt runtime directory bind mounts are set
+  mount:
+    path: /etc/libvirt/{{ item }}
+    src: /var/lib/libvirt/config/{{ item }}
+    fstype: none
+    opts: bind
+    state: mounted
+  with_items:
+  - qemu
+  - storage
+
+- name: ensure libvirtd starts at boot
+  service:
+    name=libvirtd
+    enabled=yes
+- name: ensure libvirtd is running
+  service:
+    name=libvirtd
+    state=started
+
+- name: ensure libvirt networks are defined
+  virt_net:
+    command: define
+    name: '{{ item.name }}'
+    xml: '{{ lookup("template", "net-" + item.type + ".xml.j2") }}'
+  with_items: '{{ libvirt_networks }}'
+- name: ensure libvirt networks are active
+  virt_net:
+    name: '{{ item.name }}'
+    state: active
+  with_items: '{{ libvirt_networks }}'
+- name: ensure libvirt networks start at boot
+  virt_net:
+    name: '{{ item.name }}'
+    autostart: true
+  with_items: '{{ libvirt_networks }}'