RHEL: configure QEMU to support TUN devices

This configuration is required to connect VM to the virtual network
using ethernet devices.

Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>

files/qemu/qemu.conf

@@ -0,0 +1,11 @@
+# Managed by Puppet
+# Module cloud::compute::hypervisor
+user = "root"
+group = "root"
+cgroup_device_acl = [
+    "/dev/null", "/dev/full", "/dev/zero",
+    "/dev/random", "/dev/urandom",
+    "/dev/ptmx", "/dev/kvm", "/dev/kqemu",
+    "/dev/rtc", "/dev/hpet", "/dev/net/tun",
+]
+clear_emulator_capabilities = 0

manifests/compute/hypervisor.pp

@@ -93,6 +93,17 @@ Host *
 
   }
 
+  if $::operatingsystem == 'RedHat' {
+    file { '/etc/libvirt/qemu.conf':
+      ensure => file,
+      source => 'puppet:///modules/cloud/qemu/qemu.conf',
+      owner  => root,
+      group  => root,
+      mode   => '0644',
+      notify => Service['libvirtd']
+    }
+  }
+
   if $::operatingsystem == 'Ubuntu' {
     service { 'dbus':
       ensure => running,