nova: make libvirt port configurable and check if the port is free

Change-Id: I7dbb5a33ef78dc4ecd338ffbd59a29c0fe3be9c5

ansible/roles/nova/defaults/main.yml

@@ -242,6 +242,7 @@ openstack_nova_auth: "{{ openstack_auth }}"
 openstack_placement_auth: "{{ openstack_auth }}"
 
 
+nova_libvirt_port: "16509"
 nova_ssh_port: "8022"
 
 ####################

ansible/roles/nova/tasks/precheck.yml

@@ -105,6 +105,20 @@
     - nova_ssh.enabled | bool
     - inventory_hostname in groups[nova_ssh.group]
 
+- name: Checking free port for Nova Libvirt
+  vars:
+    nova_libvirt: "{{ nova_services['nova-libvirt'] }}"
+  wait_for:
+    host: "{{ api_interface_address }}"
+    port: "{{ nova_libvirt_port }}"
+    connect_timeout: 1
+    timeout: 1
+    state: stopped
+  when:
+    - container_facts['nova_libvirt'] is not defined
+    - nova_libvirt.enabled | bool
+    - inventory_hostname in groups[nova_libvirt.group]
+
 - name: Checking free port for Nova Placement API
   vars:
     placement_api: "{{ nova_services['placement-api'] }}"

ansible/roles/nova/templates/libvirtd.conf.j2

@@ -5,3 +5,4 @@ ca_file = ""
 log_level = 3
 log_outputs = "3:file:/var/log/kolla/libvirt/libvirtd.log"
 listen_addr = "{{ api_interface_address }}"
+tcp_port = "{{ nova_libvirt_port }}"