add swapfile support

playbooks/deploy_swapfile.yml.ansible

@@ -0,0 +1,59 @@
+- name: Configure swap file for PostgreSQL node
+  hosts: dev
+  become: true
+  vars:
+    swap_file_path: /swapfile
+    swap_file_size_mb: 4096  # 4 GB
+  
+  tasks:
+    - name: Check if swap file already exists
+      stat:
+        path: "{{ swap_file_path }}"
+      register: swap_file_check
+
+    - name: Create swap file
+      command: dd if=/dev/zero of={{ swap_file_path }} bs=1M count={{ swap_file_size_mb }}
+      when: not swap_file_check.stat.exists
+      register: swap_created
+
+    - name: Set correct permissions on swap file
+      file:
+        path: "{{ swap_file_path }}"
+        owner: root
+        group: root
+        mode: '0600'
+      when: swap_created is changed
+
+    - name: Format swap file
+      command: mkswap {{ swap_file_path }}
+      when: swap_created is changed
+      register: swap_formatted
+
+    - name: Enable swap file
+      command: swapon {{ swap_file_path }}
+      when: swap_formatted is changed
+
+    - name: Check if swap is already in fstab
+      lineinfile:
+        path: /etc/fstab
+        regexp: '^{{ swap_file_path }}'
+        state: absent
+      check_mode: true
+      register: fstab_check
+      changed_when: false
+
+    - name: Add swap to fstab for persistence
+      lineinfile:
+        path: /etc/fstab
+        line: '{{ swap_file_path }} none swap sw 0 0'
+        state: present
+      when: fstab_check.found == 0
+
+    - name: Verify swap is active
+      command: swapon --show
+      register: swap_status
+      changed_when: false
+
+    - name: Display swap status
+      debug:
+        var: swap_status.stdout_lines