Stop generating ssh keypair for zun and kuryr user

There is no obvious need to have an SSH keypairs for zun and kuryr users
I was not able to find any proof in the project installation guide that
such keypairs were ever needed. Thus, such functionality is removed.

Change-Id: Icdaf2fec944aae95947ff421bf47d88e0cc0505e

defaults/main.yml

@@ -230,10 +230,6 @@ zun_service_internaluri: "{{ zun_service_internaluri_proto }}://{{ internal_lb_v
 zun_service_internalurl: "{{ zun_service_internaluri }}"
 zun_service_endpoint_type: internalURL
 
-# If you want to regenerate the zun users SSH keys, on each run, set this var to True
-# Otherwise keys will be generated on the first run and not regenerated each run.
-zun_recreate_keys: False
-
 ## General Zun configuration
 # Select between the 'runc' or 'kata' runtime
 zun_container_runtime: runc

releasenotes/notes/no_zun_ssh_keypairs-4d2f4f6e92ee4ea4.yaml

@@ -0,0 +1,7 @@
+---
+
+deprecations:
+  - |
+    Generation of SSH keypairs for Zun and Kuryr users has been deprecated
+    and removed.
+    A variable ``zun_recreate_keys`` has been removed and has no effect.

tasks/zun_compute.yml

@@ -189,20 +189,6 @@
   tags:
     - zun-kuryr-group
 
-- name: Remove old kuryr key file(s) if found
-  file:
-    path: "{{ item }}"
-    state: "absent"
-  with_items:
-    - "{{ zun_kuryr_system_home_folder }}/.ssh/authorized_keys"
-    - "{{ zun_kuryr_system_home_folder }}/.ssh/id_rsa"
-    - "{{ zun_kuryr_system_home_folder }}/.ssh/id_rsa.pub"
-  when:
-    - zun_recreate_keys | bool
-  tags:
-    - zun-kuryr-key
-    - zun-kuryr-key-create
-
 - name: Create the kuryr system user
   user:
     name: "{{ zun_kuryr_system_user_name }}"
@@ -213,12 +199,9 @@
     system: "yes"
     createhome: "yes"
     home: "{{ zun_kuryr_system_home_folder }}"
-    generate_ssh_key: "yes"
   when: zun_kuryr_system_user_name != 'root'
   tags:
     - zun-kuryr-user
-    - zun-kuryr-key
-    - zun-kuryr-key-create
 
 - name: Create kuryr dir
   file:

tasks/zun_pre_install.yml

@@ -22,20 +22,6 @@
   tags:
     - zun-group
 
-- name: Remove old key file(s) if found
-  file:
-    path: "{{ item }}"
-    state: "absent"
-  with_items:
-    - "{{ zun_system_home_folder }}/.ssh/authorized_keys"
-    - "{{ zun_system_home_folder }}/.ssh/id_rsa"
-    - "{{ zun_system_home_folder }}/.ssh/id_rsa.pub"
-  when:
-    - zun_recreate_keys | bool
-  tags:
-    - zun-key
-    - zun-key-create
-
 - name: Create the zun system user
   user:
     name: "{{ zun_system_user_name }}"
@@ -46,11 +32,8 @@
     system: "yes"
     createhome: "yes"
     home: "{{ zun_system_home_folder }}"
-    generate_ssh_key: "yes"
   tags:
     - zun-user
-    - zun-key
-    - zun-key-create
 
 - name: Create zun dir
   file: