Added base patch management role

roles/unattended-upgrades/README.rst

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+Unattended-upgrades setup
+=========================
+
+Unattended-upgrades setup role. It also installs and configures Postfix as a SMTP relay in order to send emails when target system needs to be rebooted.
+
+Requirements
+------------
+
+This role was written for Debian (11) and requires root privileges.
+
+Role Variables
+--------------
+
+Variables can be found in the `default vars <defaults/main.yml>`_. As a bare minimum you should configure SMTP credentials.
+
+.. code-block:: yaml
+
+  upgrades_sender: "{{ ansible_user }}@{{ ansible_hostname }}.lan"
+
+Defines which email unattended-upgrades will use to send emails.
+
+.. code-block:: yaml
+
+  postfix_hostname: "{{ ansible_hostname }}.lan"
+
+Configures Postfix hostname.
+
+.. code-block:: yaml
+
+  smtp_username:
+  smtp_password:
+  smtp_port: 587
+
+SMTP credentials (required). Port defaults to 587 (STARTTLS).
+
+.. code-block::yaml
+
+  relay_servername: "{{ smtp_username | regex_search('(?<=@)(.+)\\.[\\w]+$') }}"
+
+SMTP servername, defaults to ``smtp_username`` domain. If yours differs modify it here.
+
+.. code-block:: yaml
+
+  custom_smtp_header: false
+  from_header:
+  from_email:
+
+Customizes SMTP header. Make sure to configure ``from_header`` (added header) and ``from_email`` (email address of FROM) correctly if you enable SMTP headers variable.
+
+.. code-block:: yaml
+
+  smtp_masquerade: false
+
+SMTP masquerade allows to replace the FROM statement to the value of ``smtp_username``.
+
+.. code-block:: yaml
+
+  additional_lists: []
+
+List of additional sources lists you want to add to unattended-upgrades.
+
+Dependencies
+------------
+
+None.
+
+Example Playbook
+----------------
+
+.. code-block:: yaml
+  
+  - name: Deploy automatic upgrades
+    hosts: all
+    become: true
+    vars:
+      smtp_username: user@domain.com
+      smtp_password: pa$$word      
+    roles:
+      - role: 'unattended-upgrades'
+
+License
+-------
+
+BSD-3
+
+Author Information
+------------------
+
+Role created by `syrell <https://git.syyrell.com/syrell>`_.

roles/unattended-upgrades/defaults/main.yml

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+---
+# defaults file for unattended-upgrades
+
+upgrades_sender: "{{ ansible_user }}@{{ ansible_hostname }}.lan"
+postfix_hostname: "{{ ansible_hostname }}.lan"
+smtp_username:
+smtp_password:
+smtp_port: 587
+relay_servername: "{{ smtp_username | regex_search('(?<=@)(.+)\\.[\\w]+$') }}"
+
+custom_smtp_header: false
+from_header:
+from_email:
+smtp_masquerade: false
+
+additional_lists: []

roles/unattended-upgrades/handlers/main.yml

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+---
+# handlers file for unattended-upgrades
+
+- name: restart_postfix
+  service:
+    name: postfix
+    state: restarted
+  become: yes
+  
+- name: restart_unattended-upgrades
+  service:
+    name: unattended-upgrades
+    state: restarted
+  become: yes

roles/unattended-upgrades/meta/main.yml

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+galaxy_info:
+  author: your name
+  description: your role description
+  company: your company (optional)
+
+  # If the issue tracker for your role is not on github, uncomment the
+  # next line and provide a value
+  # issue_tracker_url: http://example.com/issue/tracker
+
+  # Choose a valid license ID from https://spdx.org - some suggested licenses:
+  # - BSD-3-Clause (default)
+  # - MIT
+  # - GPL-2.0-or-later
+  # - GPL-3.0-only
+  # - Apache-2.0
+  # - CC-BY-4.0
+  license: license (GPL-2.0-or-later, MIT, etc)
+
+  min_ansible_version: 2.1
+
+  # If this a Container Enabled role, provide the minimum Ansible Container version.
+  # min_ansible_container_version:
+
+  #
+  # Provide a list of supported platforms, and for each platform a list of versions.
+  # If you don't wish to enumerate all versions for a particular platform, use 'all'.
+  # To view available platforms and versions (or releases), visit:
+  # https://galaxy.ansible.com/api/v1/platforms/
+  #
+  # platforms:
+  # - name: Fedora
+  #   versions:
+  #   - all
+  #   - 25
+  # - name: SomePlatform
+  #   versions:
+  #   - all
+  #   - 1.0
+  #   - 7
+  #   - 99.99
+
+  galaxy_tags: []
+    # List tags for your role here, one per line. A tag is a keyword that describes
+    # and categorizes the role. Users find roles by searching for tags. Be sure to
+    # remove the '[]' above, if you add tags to this list.
+    #
+    # NOTE: A tag is limited to a single word comprised of alphanumeric characters.
+    #       Maximum 20 tags per role.
+
+dependencies: []
+  # List your role dependencies here, one per line. Be sure to remove the '[]' above,
+  # if you add dependencies to this list.

roles/unattended-upgrades/tasks/main.yml

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+---
+# tasks file for unattended-upgrades
+
+- name: Check if Postfix is already configured
+  stat:
+    path: /etc/postfix/sasl_passwd.db
+  register: postfix_configured
+
+- import_tasks: postfix.yml
+  when: postfix_configured.stat.exists == false
+
+- import_tasks: unattended-upgrades.yml

roles/unattended-upgrades/tasks/postfix.yml

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+- name: Install postfix and mail client
+  apt:
+    update_cache: true
+    pkg:
+    - bsd-mailx
+    - postfix
+    - libsasl2-modules
+
+- name: Insert postfix main configuration
+  template:
+    src: main.cf.j2
+    dest: /etc/postfix/main.cf
+    backup: true
+  notify: restart_postfix
+  
+- name: Setup credentials
+  template:
+    src: mail_credentials.j2
+    dest: /etc/postfix/sasl_passwd
+    mode: 0600
+
+- name: Generate sasl.db file
+  command: postmap /etc/postfix/sasl_passwd
+
+- name: Delete credentials file
+  file:
+    name: /etc/postfix/sasl_passwd
+    state: absent
+
+- name: SMTP header tasks
+  block:
+  - name: Add custom from header configuration
+    template:
+      src: mail_headers.j2
+      dest: /etc/postfix/smtp_header_checks
+      mode: 0600
+      backup: true
+
+  - name: Add postfix-pcre package
+    apt:
+      name: postfix-pcre
+  when: custom_smtp_header
+
+- name: SMTP masquerade tasks
+  block:
+  - name: Add SMTP masquerade file
+    template:
+      src: mail_generic.j2
+      dest: /etc/postfix/generic
+      mode: 0600
+      backup: true
+
+  - name: Generate generic.db file
+    command: postmap /etc/postfix/generic
+  when: smtp_masquerade

roles/unattended-upgrades/tasks/unattended-upgrades.yml

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+- name: Install unattended-upgrades package
+  apt:
+    name: unattended-upgrades
+    state: present
+
+- name: Setup unattended-upgrades config
+  template:
+    src: unattended-upgrades.j2
+    dest: /etc/apt/apt.conf.d/52unattended-upgrades
+    backup: true
+  notify: restart_unattended-upgrades
+
+- name: Setup reboot notifier script
+  template:
+    src: reboot_alert.sh.j2
+    dest: /usr/local/sbin/reboot_alert.sh
+    backup: true
+    mode: +x
+
+- name: Setup cron to launch notifier script
+  cron:
+    name: "alert if reboot is required"
+    minute: "0"
+    hour: "8"
+    job: "/usr/local/sbin/reboot_alert.sh"

roles/unattended-upgrades/templates/mail_credentials.j2

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+[{{ relay_servername }}]:{{ smtp_port }}    {{ smtp_username }}:{{ smtp_password }}

roles/unattended-upgrades/templates/mail_generic.j2

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+{{ upgrades_sender }} {{ smtp_username }}

roles/unattended-upgrades/templates/mail_headers.j2

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+/^From:.*/ REPLACE From: {{ from_header }} <{{ from_email }}>

roles/unattended-upgrades/templates/main.cf.j2

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+myhostname={{ postfix_hostname }}
+
+smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
+biff = no
+
+# appending .domain is the MUA's job.
+append_dot_mydomain = no
+
+alias_maps = hash:/etc/aliases
+alias_database = hash:/etc/aliases
+{% if custom_smtp_header %}smtp_header_checks = pcre:/etc/postfix/smtp_header_checks
+{% endif %}
+{% if smtp_masquerade %}smtp_generic_maps = hash:/etc/postfix/generic
+{% endif %}
+
+relayhost = [{{ relay_servername }}]:{{ smtp_port }}
+smtp_use_tls = yes
+smtp_sasl_auth_enable = yes
+smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
+smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
+smtp_sasl_security_options = noanonymous, noplaintext
+smtp_sasl_tls_security_options = noanonymous
+smtp_tls_security_level = encrypt
+
+mynetworks = 127.0.0.0/8
+inet_interfaces = loopback-only
+recipient_delimiter = +
+
+compatibility_level = 2

roles/unattended-upgrades/templates/reboot_alert.sh.j2

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+#!/bin/bash
+
+if [ -f /var/run/reboot-required ]; then
+    echo "A reboot is required following updates to server `hostname -f` for packages: \n \n $(cat /var/run/reboot-required.pkgs)" | mail -s "Reboot Required" {{ smtp_username }}
+fi

roles/unattended-upgrades/templates/unattended-upgrades.j2

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+Unattended-Upgrade::Origins-Pattern {
+        "origin=Debian,codename=${distro_codename}-updates";
+        "origin=Debian,codename=${distro_codename},label=Debian";
+        "origin=Debian,codename=${distro_codename},label=Debian-Security";
+        "origin=Debian,codename=${distro_codename}-security,label=Debian-Security";
+{% for list in additional_lists %}
+        "{{ list }}";
+{% endfor %}
+};
+
+APT::Periodic::Update-Package-Lists "1";
+APT::Periodic::Unattended-Upgrade "1";
+APT::Periodic::Download-Upgradeable-Packages "1";
+APT::Periodic::AutocleanInterval "7";
+APT::Periodic::Verbose "2";
+
+Unattended-Upgrade::Mail "{{ smtp_username }}";
+Unattended-Upgrade::Sender "{{ upgrades_sender }}";
+Unattended-Upgrade::MailReport "on-change";
+
+Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";
+Unattended-Upgrade::Remove-New-Unused-Dependencies "true";
+Unattended-Upgrade::Remove-Unused-Dependencies "false";

roles/unattended-upgrades/vars/main.yml

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+---
+# vars file for system_updates