Add additional metadata configuration options to external Openstack C…

…CM (#6338) (#6339)

* Add additional metadata configuration option to external Openstack CCM (#6338)

* Set the variable external_openstack_metadata_search_order undefined by default

docs/openstack.md

@@ -108,5 +108,11 @@ The new cloud provider is configured to have Octavia by default in Kubespray.
  - ""
  ```
 
+- You can override the default OpenStack metadata configuration (see [#6338](https:/kubernetes-sigs/kubespray/issues/6338) for explanation):
+
+ ```yaml
+ external_openstack_metadata_search_order: "configDrive,metadataService"
+ ```
+
 - Run `source path/to/your/openstack-rc` to read your OpenStack credentials like `OS_AUTH_URL`, `OS_USERNAME`, `OS_PASSWORD`, etc. Those variables are used for accessing OpenStack from the external cloud provider.
 - Run the `cluster.yml` playbook

inventory/sample/group_vars/all/openstack.yml

@@ -33,6 +33,7 @@
 # - ""
 # external_openstack_network_public_networks:
 # - ""
+# external_openstack_metadata_search_order: "configDrive,metadataService"
 
 ## The tag of the external OpenStack Cloud Controller image
 # external_openstack_cloud_controller_image_tag: "latest"

roles/kubernetes-apps/external_cloud_controller/openstack/templates/external-openstack-cloud-config.j2

@@ -57,3 +57,8 @@ internal-network-name="{{ network_name }}"
 {% for network_name in external_openstack_network_public_networks %}
 public-network-name="{{ network_name }}"
 {% endfor %}
+
+[Metadata]
+{% if external_openstack_metadata_search_order is defined %}
+search-order="{{ external_openstack_metadata_search_order }}"
+{% endif %}