omni-ansible/playbooks/configure-mgmt.yml

---
- name: Configure server management services
  hosts: servers
  tasks:
    - import_tasks: tasks/sshd/secure.yml

    - name: Enable cockpit
      when: ansible_distribution == "CentOS" and ansible_distribution_major_version == "8"
      become: true
      systemd:
        name: cockpit.socket
        enabled: true
        state: started

- name: Configure virtualization management services
  hosts: virtualization
  tasks:
    - name: Create docker group
      become: true
      group:
        name: docker
        state: present

- name: Configure local accounts
  hosts: all
  vars_files:
    - vars/accounts.yaml
    - vars/secrets/passwords.yaml
    - vars/sshkeys.yaml
  tasks:
    - name: Create omni group
      become: true
      group:
        name: "{{ omni_group.name }}"
        gid: "{{ omni_group.gid }}"
        state: present

    - name: Determine existing omni users
      changed_when: false
      shell:
        cmd: 'grep omni /etc/group | cut --delimiter : --fields 4 | tr "," "\n"'
      register: _existing_omni_users

    - name: Delete removed user accounts
      become: true
      when: item not in (omni_users | items2dict(key_name='name', value_name='uid'))
      user:
        name: "{{ item }}"
        state: absent
      loop: "{{ _existing_omni_users.stdout_lines }}"

    - name: Delete removed user groups
      become: true
      when: item not in (omni_users | items2dict(key_name='name', value_name='uid'))
      group:
        name: "{{ item }}"
        state: absent
      loop: "{{ _existing_omni_users.stdout_lines }}"

    - name: Delete removed user home directories
      become: true
      when: item not in (omni_users | items2dict(key_name='name', value_name='uid'))
      file:
        path: "/home/{{ item }}"
        state: absent
      loop: "{{ _existing_omni_users.stdout_lines }}"

    - name: Create account groups
      become: true
      group:
        name: "{{ item.name }}"
        gid: "{{ item.uid }}"
        state: present
      loop: "{{ omni_users }}"
      loop_control:
        label: "{{ item.uid }},{{ item.name }}"

    - name: Create accounts
      become: true
      user:
        name: "{{ item.name }}"
        state: present
        uid: "{{ item.uid }}"
        group: "{{ item.name }}"
        groups: >-
          {{
            [omni_group.name] +
            (['wheel' if ansible_os_family | lower == 'redhat' else 'sudo'] if item.admin | default(false) else []) +
            (['docker' if 'virtualization' in group_names else omni_group.name] if item.admin | default(false) else [])
          }}          
        # The 'else omni_group.name' above is just some non-breaking value to cover the
        # false condition, it doesn't have special meaning
        comment: "{{ item.fullname | default('') }}"
        shell: "{{ '/bin/bash' if 'mgmt' in item.targets else '/bin/false' }}"
        system: "{{ item.svc | default(false) }}"
        generate_ssh_key: false
        password: "{{ omni_users_secrets[item.name] | default(none) }}"
      loop: "{{ omni_users }}"
      loop_control:
        label: "{{ item.uid }},{{ item.name }}"

    - name: Disable sudo password for ansible
      become: true
      lineinfile:
        create: true
        path: /etc/sudoers.d/30-ansible
        line: "ansible ALL=(ALL) NOPASSWD:ALL"
        mode: 0644

    - name: Ensure proper ownership of user home directories
      become: true
      file:
        path: /home/{{ item.name }}
        state: directory
        group: "{{ item.name }}"
        owner: "{{ item.name }}"
        mode: 0700
      loop: "{{ omni_users }}"
      loop_control:
        label: "{{ item.uid }},{{ item.name }}"

    - name: Enforce root password
      become: true
      user:
        name: root
        password: "{{ omni_users_secrets.root }}"
        state: present

    - name: Create SSH directory
      become: true
      file:
        path: /home/{{ item.name }}/.ssh
        owner: "{{ item.name }}"
        group: "{{ item.name }}"
        state: directory
        mode: 0755
      loop: "{{ omni_users }}"
      loop_control:
        label: "{{ item.uid }},{{ item.name }}"

    - name: Update authorized keys
      become: true
      when: "'mgmt' in item.targets"
      authorized_key:
        user: "{{ item.name }}"
        key: "{{ omni_ssh_keys[item.name] | join('\n') }}"
        state: present
        exclusive: true
      loop: "{{ omni_users }}"
      loop_control:
        label: "{{ item.uid }},{{ item.name }}"

    - name: Enforce ownership of authorized keys
      become: true
      when: "'mgmt' in item.targets"
      file:
        path: /home/{{ item.name }}/.ssh/authorized_keys
        state: file
        owner: "{{ item.name }}"
        group: "{{ item.name }}"
        mode: 0400
      loop: "{{ omni_users }}"
      loop_control:
        label: "{{ item.uid }},{{ item.name }}"