initial commit

roles/base_os/handlers/main.yml

@@ -0,0 +1,5 @@
+---
+- name: restart chrony
+  ansible.builtin.systemd:
+    name: "{{ base_os_chrony_service_name }}"
+    state: restarted

roles/base_os/tasks/main.yml

@@ -0,0 +1,75 @@
+---
+- name: Include OS-family-specific variables
+  ansible.builtin.include_vars: "{{ item }}"
+  with_first_found:
+    - "{{ ansible_facts['os_family'] }}.yml"
+    - "default.yml"
+  tags: [base_os, always]
+
+- name: Update apt cache
+  ansible.builtin.apt:
+    update_cache: true
+    cache_valid_time: 3600
+  when: ansible_facts['os_family'] == "Debian"
+  tags: [base_os]
+
+- name: Install base packages
+  ansible.builtin.package:
+    name: "{{ base_os_packages + (base_extra_packages | default([])) }}"
+    state: present
+  tags: [base_os]
+
+- name: Set timezone
+  community.general.timezone:
+    name: "{{ timezone }}"
+  tags: [base_os]
+
+- name: Deploy chrony configuration
+  ansible.builtin.template:
+    src: chrony.conf.j2
+    dest: "{{ base_os_chrony_config_path }}"
+    owner: root
+    group: root
+    mode: "0644"
+  notify: restart chrony
+  tags: [base_os]
+
+- name: Enable and start chrony
+  ansible.builtin.systemd:
+    name: "{{ base_os_chrony_service_name }}"
+    enabled: true
+    state: started
+  tags: [base_os]
+
+- name: Set hostname from inventory
+  ansible.builtin.hostname:
+    name: "{{ inventory_hostname }}"
+  tags: [base_os]
+
+- name: Remove unwanted packages
+  ansible.builtin.package:
+    name: "{{ base_os_unwanted_packages }}"
+    state: absent
+  tags: [base_os, cis_hardening]
+
+- name: Gather service facts
+  ansible.builtin.service_facts:
+  tags: [base_os]
+
+- name: Disable unneeded services if installed
+  ansible.builtin.systemd:
+    name: "{{ item }}"
+    enabled: false
+    state: stopped
+  loop: "{{ base_unneeded_services }}"
+  when: (item + '.service') in ansible_facts.services
+  tags: [base_os]
+
+- name: Deploy post-login MOTD
+  ansible.builtin.template:
+    src: motd.j2
+    dest: /etc/motd
+    owner: root
+    group: root
+    mode: "0644"
+  tags: [base_os]

roles/base_os/templates/chrony.conf.j2

@@ -0,0 +1,9 @@
+# {{ ansible_managed }}
+{% for server in ntp_servers %}
+server {{ server }} iburst
+{% endfor %}
+
+driftfile /var/lib/chrony/drift
+makestep 1.0 3
+rtcsync
+logdir /var/log/chrony

roles/base_os/templates/motd.j2

@@ -0,0 +1,6 @@
+******************************************************************
+  AUTHORIZED ACCESS ONLY.
+  All activity on this system is logged and monitored.
+  Unauthorized access is prohibited and may be prosecuted.
+  Managed via Ansible ({{ inventory_hostname }}).
+******************************************************************

roles/base_os/vars/Debian.yml

@@ -0,0 +1,17 @@
+---
+base_os_packages:
+  - vim
+  - chrony
+  - auditd
+  - firewalld
+  - rsyslog
+  - sudo
+base_os_unwanted_packages:
+  - sendmail
+  - telnet
+  - rsh-client
+  - rsh-redone-client
+  - nis
+  - tftp
+base_os_chrony_config_path: /etc/chrony/chrony.conf
+base_os_chrony_service_name: chrony

roles/base_os/vars/RedHat.yml

@@ -0,0 +1,17 @@
+---
+base_os_packages:
+  - vim-enhanced
+  - chrony
+  - audit
+  - policycoreutils-python-utils
+  - firewalld
+  - rsyslog
+  - sudo
+base_os_unwanted_packages:
+  - sendmail
+  - telnet
+  - rsh
+  - ypbind
+  - tftp
+base_os_chrony_config_path: /etc/chrony.conf
+base_os_chrony_service_name: chronyd