Merge "Fix live migration to use migration int. address"

ansible/roles/nova-cell/templates/nova.conf.d/libvirt.conf.j2

 [libvirt]
 {% if libvirt_tls | bool %}
-connection_uri = "qemu+tls://{{ migration_hostname }}/system"
-live_migration_uri = "qemu+tls://%s/system"
+connection_uri = "qemu+tls://{{ migration_hostname | put_address_in_context('url') }}/system"
+live_migration_scheme = "tls"
+live_migration_inbound_addr = "{{ migration_hostname }}"
 {% else %}
 connection_uri = "qemu+tcp://{{ migration_interface_address | put_address_in_context('url') }}/system"
+live_migration_inbound_addr = "{{ migration_interface_address }}"
 {% endif %}
 {% if nova_backend == "rbd" %}
 images_type = rbd

releasenotes/notes/bug-1729566-8b77402fd8236962.yaml

+---
+fixes:
+  - |
+    Fixes an issue with Nova live migration not using
+    ``migration_interface_address`` even when TLS was not used.
+    When migrating an instance to a newly added compute host, if addressing
+    depended on ``/etc/hosts`` and it had not been updated on the
+    source compute host to include the new compute host, live migration would
+    fail. This did not affect DNS-based name resolution.
+    Analogically, Nova live migration would fail if the address in
+    DNS/``/etc/hosts`` was not the same as ``migration_interface_address``
+    due to user customization.
+    `LP#1729566 <https://bugs.launchpad.net/kolla-ansible/+bug/1729566>`__