Dell-Omnia-Clusters-HPC-AI/roles/login_node/tasks/configure_sshd.yml

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#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
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#      http://www.apache.org/licenses/LICENSE-2.0
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---

- name: Set values for user and allow_deny variables
  set_fact:
    user: "{{ hostvars['127.0.0.1']['user'] }}"
    allow_deny: "{{ hostvars['127.0.0.1']['allow_deny'] }}"
    
- name: Check if AllowUsers entry exixts
  shell: cat "{{ sshd_conf_file }}"
  register: file_content
  changed_when: false

- name: Check if user is specified
  debug:
    msg: "Users not specified"
  when: user | length < 1

- name: Configure sshd_config
  block:
    - name: Configure sshd_config file when AllowUsers entry not exists
      lineinfile:
        path: "{{ sshd_conf_file }}"
        line: 'AllowUsers {{ user }}'
      notify:
        - Restart sshd
      when:
        - allow_deny == 'Allow'
        - file_content.stdout.find('AllowUsers') == -1

    - name: Configure sshd_config file when DenyUsers entry not exists
      lineinfile:
        path: "{{ sshd_conf_file }}"
        line: 'DenyUsers {{ user }}'
      notify:
        - Restart sshd
      when:
        - allow_deny == 'Deny'
        - file_content.stdout.find('DenyUsers') == -1

    - name: Configure sshd_config file when AllowUsers entry exists
      replace:
        path: "{{ sshd_conf_file }}"
        regexp: '^(AllowUsers)(.*)'
        replace: '\1\2 {{ user }}'
      notify:
        - Restart sshd
      when:
        - allow_deny == 'Allow'
        - file_content.stdout.find('AllowUsers') != -1

    - name: Configure sshd_config file when DenyUsers entry exists
      replace:
        path: "{{ sshd_conf_file }}"
        regexp: '^(DenyUsers)(.*)'
        replace: '\1\2 {{ user }}'
      notify:
        - Restart sshd
      when:
        - allow_deny == 'Deny'
        - file_content.stdout.find('DenyUsers') != -1

  when:
    - user | length > 1