Deprecate enable_host_ntp

As agreed during IRC meeting. [1]

[1] http://eavesdrop.openstack.org/meetings/kolla/2021/kolla.2021-04-07-15.00.html

Change-Id: Ibffa019e2106784e97f5c482106bb5082f788752

ansible/roles/baremetal/defaults/main.yml

@@ -24,6 +24,8 @@ create_kolla_user_sudoers: "{{ create_kolla_user }}"
 kolla_user: "kolla"
 kolla_group: "kolla"
 
+# Deprecated since Wallaby. To be dropped in Xena.
+# Please use other means of configuring NTP.
 enable_host_ntp: False
 
 change_selinux: True

ansible/roles/baremetal/tasks/post-install.yml

@@ -242,6 +242,13 @@
     enabled: yes
   become: True
 
+- name: Warn about deprecations
+  debug:
+    msg: >
+      enable_host_ntp is deprecated.
+      Please configure NTP using a different tool.
+  when: enable_host_ntp | bool
+
 - name: Stop time service
   service:
     name: ntp

doc/source/reference/deployment-and-bootstrapping/bootstrap-servers.rst

@@ -229,5 +229,10 @@ then the SELinux state will be set to ``selinux_state`` (default
 Configuration of NTP daemon
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+.. warning::
+   Support for configuration of NTP daemon is deprecated and will be removed in
+   the next Kolla Ansible release (Xena).
+   Please use other means of configuring NTP.
+
 This is optional, and enabled by ``enable_host_ntp``, which is ``false`` by
 default.

releasenotes/notes/deprecate-enable-host-ntp-3ad934c097f18b1b.yaml

@@ -0,0 +1,7 @@
+---
+deprecations:
+  - |
+    Support for configuration of NTP daemon (via ``enable_host_ntp``) is
+    deprecated and will be removed in the next Kolla Ansible release
+    (Xena).
+    Please use other means of configuring NTP.