Add linux_patch role — package facts before/after, apt/dnf, version diff tracking

roles/linux_patch/tasks/main.yml

@@ -1,6 +1,131 @@
 ---
-# linux_patch tasks
-# Implementation to follow
-- name: Placeholder
+- name: Gather package facts before patching
+  ansible.builtin.package_facts:
+    manager: auto
+  register: packages_before
+
+- name: Store pre-patch package versions
+  ansible.builtin.set_fact:
+    packages_pre_patch: "{{ ansible_facts.packages }}"
+
+- name: Check for available updates (Debian/Ubuntu)
+  ansible.builtin.apt:
+    update_cache: true
+    cache_valid_time: 3600
+  when: ansible_os_family == "Debian"
+  changed_when: false
+
+- name: Get list of upgradable packages (Debian/Ubuntu)
+  ansible.builtin.shell: |
+    apt list --upgradable 2>/dev/null | grep -v "Listing..." | awk -F'/' '{print $1}'
+  register: upgradable_packages
+  changed_when: false
+  when: ansible_os_family == "Debian"
+
+- name: Get list of upgradable packages (RHEL/CentOS)
+  ansible.builtin.shell: |
+    dnf check-update --quiet | awk '{print $1}' | grep -v "^$"
+  register: upgradable_packages
+  changed_when: false
+  failed_when: upgradable_packages.rc not in [0, 100]
+  when: ansible_os_family == "RedHat"
+
+- name: Log packages to be updated
   ansible.builtin.debug:
-    msg: "linux_patch role - tasks to be implemented"
+    msg: "Packages to be updated on {{ inventory_hostname }}: {{ upgradable_packages.stdout_lines | length }} packages"
+
+- name: Perform full upgrade (Debian/Ubuntu)
+  ansible.builtin.apt:
+    upgrade: dist
+    autoremove: true
+    autoclean: true
+  register: apt_upgrade_result
+  when:
+    - ansible_os_family == "Debian"
+    - patch_mode == "full" or patch_mode == "security"
+
+- name: Perform security-only upgrade (RHEL/CentOS)
+  ansible.builtin.dnf:
+    name: "*"
+    state: latest
+    security: "{{ patch_mode == 'security' }}"
+    update_cache: true
+  register: dnf_upgrade_result
+  when: ansible_os_family == "RedHat"
+
+- name: Gather package facts after patching
+  ansible.builtin.package_facts:
+    manager: auto
+
+- name: Store post-patch package versions
+  ansible.builtin.set_fact:
+    packages_post_patch: "{{ ansible_facts.packages }}"
+
+- name: Calculate changed packages
+  ansible.builtin.set_fact:
+    packages_updated: >-
+      {{
+        packages_post_patch | dict2items
+        | selectattr('key', 'in', packages_pre_patch)
+        | selectattr('value', '!=', packages_pre_patch[item.key] | default([]))
+        | list
+        | map(attribute='key')
+        | list
+      }}
+  loop: "{{ packages_post_patch | dict2items }}"
+  when: false
+
+- name: Build packages updated list
+  ansible.builtin.set_fact:
+    packages_updated: >-
+      {%- set updated = [] -%}
+      {%- for pkg, details in packages_post_patch.items() -%}
+        {%- if pkg in packages_pre_patch -%}
+          {%- if details[0].version != packages_pre_patch[pkg][0].version -%}
+            {%- set _ = updated.append({
+              'name': pkg,
+              'version_before': packages_pre_patch[pkg][0].version,
+              'version_after': details[0].version,
+              'type': 'updated'
+            }) -%}
+          {%- endif -%}
+        {%- else -%}
+          {%- set _ = updated.append({
+            'name': pkg,
+            'version_before': 'not installed',
+            'version_after': details[0].version,
+            'type': 'new'
+          }) -%}
+        {%- endif -%}
+      {%- endfor -%}
+      {{ updated }}
+
+- name: Log updated packages
+  ansible.builtin.debug:
+    msg: "Updated: {{ item.name }} {{ item.version_before }} -> {{ item.version_after }}"
+  loop: "{{ packages_updated }}"
+
+- name: Check if reboot is required after patching (Debian/Ubuntu)
+  ansible.builtin.stat:
+    path: /var/run/reboot-required
+  register: reboot_required_post
+  when: ansible_os_family == "Debian"
+
+- name: Update reboot required fact
+  ansible.builtin.set_fact:
+    host_reboot_required: "{{ reboot_required_post.stat.exists | default(false) }}"
+  when: ansible_os_family == "Debian"
+
+- name: Reboot if required and auto_reboot is enabled
+  ansible.builtin.reboot:
+    reboot_timeout: 300
+    pre_reboot_delay: 10
+    post_reboot_delay: 30
+    msg: "Rebooting after patch run — initiated by Ansible"
+  when:
+    - host_reboot_required | bool
+    - auto_reboot | bool
+
+- name: Patching complete
+  ansible.builtin.debug:
+    msg: "Patching complete on {{ inventory_hostname }} — {{ packages_updated | length }} packages updated"