Create validate_hostname.yml

Signed-off-by: abhishek-sa1 <abhishek.sa3@dell.com>

roles/hostname_validation/tasks/validate_hostname.yml

@@ -0,0 +1,54 @@
+# Copyright 2022 Dell Inc. or its subsidiaries. All Rights Reserved.
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+---
+
+- name: Fetch the hostname
+  command: hostname -s
+  register: machine_hostname
+  changed_when: false
+
+- name: Verify the hostname is not blank in hostname
+  fail:
+    msg: " {{ hostname_blank_msg }}"
+  when: machine_hostname.stdout | length < 1
+
+- name: Validate the host name
+  assert:
+    that:
+      - machine_hostname.stdout is regex(("^(([a-z]|[a-z][a-z0-9\-]*[a-z0-9])\.)*([a-z]|[a-z][a-z0-9\-]*[a-z0-9])$"))
+      - machine_hostname.stdout != "localhost"
+    success_msg: "{{ server_hostname_success }}"
+    fail_msg: "{{ server_hostname_fail }}"
+
+- name: Fetch the domain name
+  command: hostname -d
+  register: domain_name_set
+  changed_when: false
+  failed_when: false
+
+- name: Verify the domain name is not blank in hostname
+  fail:
+    msg: " {{ domain_name_blank_msg }}"
+  when: domain_name_set.stdout | length < 1
+
+- name: Set fact for the domain name in hostname
+  set_fact:
+    ms_domain_name: "{{ domain_name_set.stdout }}"
+
+- name: Validate the domain name set on the host
+  assert:
+    that:
+      - hostvars['127.0.0.1']['domain_name'] == ms_domain_name
+    success_msg: "{{ server_domain_name_success }}"
+    fail_msg: "{{ server_domain_name_fail }}"