Adds LibvirtLogOutputs to define how log outputs are sent

LibvrtLogOutputs to define how log outputs are sent,
like file, syslog, and so on.
In default, it is configured so that libvirt directly records
its log into /var/log/containers/libvirt/libvirtd.log .

Change-Id: Iac3d3e9d95c281433cf189c7d277f0a833736ffa

deployment/nova/nova-libvirt-container-puppet.yaml

@@ -212,6 +212,11 @@ parameters:
     type: boolean
     tags:
       - role_specific
+  LibvirtLogOutputs:
+    description: Defines how log outputs are sent, as described in
+                 https://libvirt.org/logging.html .
+    type: string
+    default: '3:file:/var/log/libvirt/libvirtd.log'
   LibvirtLogFilters:
     description: Defines a filter to select a different logging level
                  for a given category log outputs, as specified in
@@ -393,7 +398,7 @@ outputs:
                    "%{hiera('$NETWORK')}"
                  params:
                    $NETWORK: {get_param: [ServiceNetMap, NovaLibvirtNetwork]}
-            nova::compute::libvirt::log_outputs: "3:syslog:libvirtd"
+            nova::compute::libvirt::log_outputs: {get_param: LibvirtLogOutputs}
             nova::compute::libvirt::log_filters: {get_param: LibvirtLogFilters}
             rbd_persistent_storage: {get_param: CinderEnableRbdBackend}
             tripleo::nova_libvirt::firewall_rules:

releasenotes/notes/nova_libvirtd_log_outputs-bf4091c0c7c5a968.yaml

@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    Adds LibvirtLogOutputs parameter to define how log outputs are sent,
+    as described in https://libvirt.org/logging.html . In default, this
+    parameter is set so that log outputs are directly recorded into
+    /var/log/containers/libvirt/libvirtd.log .
+    Default:
+    '3:file:/var/log/libvirt/libvirtd.log'