[MMA-17623] - adding skip tag for c3 next gen host count validation (#2272)

* adding skip tag for c3 next gen host count

* using variable instead of tag

* fixing config

* added better message as well

* adding docs string

Author: nagarwal01

docs/VARIABLES.md

@@ -740,6 +740,14 @@ Default:  false
 
 ***
 
+### skip_control_center_next_gen_host_count_validation
+
+Boolean to skip Control Center Next Gen host count validation. Set to true to skip validation that requires exactly one Control Center Next Gen host.
+
+Default:  false
+
+***
+
 ### user_login_shell
 
 Variable to set the user login shell for all custom user created per component by cp-ansible.

roles/common/tasks/config_validations.yml

@@ -375,10 +375,11 @@
       - c3_host_count | int == 1
     fail_msg: >-
       Please ensure your 'control_center_next_gen' group or default resolves to a single host.
-    success_msg: "The list of resolved Control Center Next Gen hosts correctly contains a single entry."
+    success_msg: "The list of resolved Control Center Next Gen hosts correctly contains a single entry. To skip this validation, set skip_control_center_next_gen_host_count_validation: true."
   when:
     - "'control_center_next_gen' in groups"
     - "groups['control_center_next_gen'] | length > 0"
+    - not skip_control_center_next_gen_host_count_validation|bool
   tags:
     - validate
 

roles/variables/defaults/main.yml

@@ -317,6 +317,9 @@ validate_hosts: true
 ### Boolean used for disabling of systemd service restarts when rootless install is executed
 skip_restarts: false
 
+### Boolean to skip Control Center Next Gen host count validation. Set to true to skip validation that requires exactly one Control Center Next Gen host.
+skip_control_center_next_gen_host_count_validation: false
+
 ### Variable to set the user login shell for all custom user created per component by cp-ansible.
 user_login_shell: /sbin/nologin