diff --git a/ansible/roles/kolla-build/templates/kolla-build.conf.j2 b/ansible/roles/kolla-build/templates/kolla-build.conf.j2
index 18a79be3c..5603bf787 100644
--- a/ansible/roles/kolla-build/templates/kolla-build.conf.j2
+++ b/ansible/roles/kolla-build/templates/kolla-build.conf.j2
@@ -11,6 +11,10 @@ install_type={{ kolla_install_type }}
 # Docker namespace to use for Kolla images.
 namespace={{ kolla_docker_namespace }}
 
+# Use host networking by default, in line with Kolla Ansible's default Docker
+# engine configuration.
+network_mode=host
+
 # Docker image tag to apply.
 tag={{ kolla_tag }}
 
diff --git a/releasenotes/notes/kolla-build-network-mode-ba92e36d52e70d99.yaml b/releasenotes/notes/kolla-build-network-mode-ba92e36d52e70d99.yaml
new file mode 100644
index 000000000..4a55b8d36
--- /dev/null
+++ b/releasenotes/notes/kolla-build-network-mode-ba92e36d52e70d99.yaml
@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    Fixes an issue with container image builds by using ``host`` as the default
+    ``network_mode`` for ``kolla-build``. See `story 2008942
+    <https://storyboard.openstack.org/#!/story/2008942>`__ for details.