omni-ansible/playbooks/update-users-local.yml

---
- import_playbook: dependencies.yml

- hosts: all
  name: Update local user accounts and access controls
  tasks:
    - import_tasks: tasks/users-preprocessing.yml

    - name: Create local user accounts
      tags: users_create
      become: true
      block:
        - name: Create groups
          group:
            name: "{{ item }}"
            state: present
          loop: "{{ targets + ['omni'] }}"

        - name: Create users
          user:
            name: "{{ item.name }}"
            comment: "{{ item.fullname | default('') }}"
            shell: /bin/bash
            groups: "{{ item.targets | intersect(targets) }} + {{ [ 'omni' ] if item.name != 'root' else [] }}"
            system: "{{ item.svc | default('no') }}"
            state: present
            generate_ssh_key: "{{ 'yes' if generate_keys|bool == true else 'no' }}"
            ssh_key_comment: "{{ item.name }}@{{ inventory_hostname }}"
            ssh_key_bits: 4096
            ssh_key_type: ed25519
            password: "{{ item.password }}"
          loop: "{{ local_users | difference([None]) }}"

    - name: Delete users that have been removed
      tags: users_delete
      block:
        - name: Determine existing users
          shell: 'grep omni /etc/group | cut -d: -f4 | tr "," "\n"'
          changed_when: false
          register: existing_users

        - name: Coallate user names
          set_fact:
            user_names: "{{ user_names | default([]) + [item.name] }}"
          loop: "{{ users }}"

        - name: Determine removed users
          set_fact:
            removed_users: "{{ existing_users.stdout_lines | difference(local_users) | difference([None]) }}"

        - name: Delete removed user accounts
          become: true
          user:
            name: "{{ item }}"
            state: absent
          loop: "{{ removed_users }}"

    - name: Grant sudo permissions
      tags: users_sudo
      block:
        - name: Add users to sudo group on Fedora/CentOS/RHEL
          when: ansible_distribution == "Fedora" or ansible_distribution == "Red Hat Enterprise Linux" or ansible_distribution == "CentOS"
          become: true
          user:
            name: "{{ item }}"
            groups: wheel
            state: present
          loop: "{{ local_admin_users | difference([None]) }}"

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

        - name: Disable sudo password for admin users
          become: true
          lineinfile:
            create: yes
            path: /etc/sudoers.d/40-admin
            line: "{{ item }} ALL=(ALL) NOPASSWD:ALL"
            mode: 0644
            state: "{{ 'absent' if disable_sudo_password|bool == false else 'present' }}"
          loop: "{{ local_admin_users | difference([None] )}}"

    - name: Configure GNOME
      tags: users_gnome
      when: ansible_distribution == "Fedora" and disable_gnome_user_list|bool == true
      become: true
      block:
        - name: Configure GDM profile
          blockinfile:
            path: /etc/ssh/sshd_config
            block: |
              user-db:user
              system-db:gdm
              file-db:/usr/share/gdm/greeter-dconf-defaults
        - name: Configure GDM keyfile
          blockinfile:
            create: true
            path: /etc/dconf/db/gdm.d/00-login-screen
            block: |
              [org/gnome/login-screen]
              # Do not show the user list
              disable-user-list=true
        - name: Delete existing user database
          file:
            path: /var/lib/gdm/.config/dconf/user
            state: absent
        - name: Restart dconf database
          shell: dconf update

    - name: Install public keys
      tags: users_keys
      become: true
      block:
        - name: Ensure SSH directory exists
          file:
            state: directory
            path: /home/{{ item.name }}/.ssh
          loop: "{{ local_users | difference([None]) }}"
        - name: Put keys on remote
          when: item.keys != []
          authorized_key:
            user: "{{ item.name }}"
            key: "{{ item.sshkeys | join('\n') }}"
            state: present
            exclusive: yes
          loop: "{{ local_users | difference([None]) }}"

    - name: Ensure proper ownership of user home directories
      become: true
      file:
        group: "{{ item.name }}"
        owner: "{{ item.name }}"
        path: /home/{{ item.name }}
        recurse: yes
        state: directory
      loop: "{{ local_users | difference([None]) }}"

- hosts: all
  name: Disable SSH password authentication
  tags:
    - always
  tasks:
    - import_tasks: tasks/sshd/disable-password-auth.yml
      when: enable_ssh_password_auth|bool == false