add tasks to configure additional swapfile

config.yml

@@ -31,6 +31,7 @@ smtp_username: smtpuser
 smtp_password: smtppassword
 smtp_authentication: plain
 smtp_enable_starttls: true
+swap_add_mb: 500
 ruby_version: 2.1.3
 is_production_vm: False
 redmine_files_nfs_mount: ''  # /mnt/redminefiles

roles/easyredmine/tasks/addswap.yml

@@ -0,0 +1,46 @@
+# add new swap file if it does not already exist.
+# Set `swap_add_mb` in config for swap size in MByte
+#     swap_add_mb: 1024
+# Based on https://gist.github.com/manuelmeurer/a2c0a8c24a0bb5092250
+#
+- name: set swap_file variable
+  set_fact:
+    swap_file: /var/swap
+
+- name: check if swap file exists
+  stat:
+    path: "{{ swap_file }}"
+  register: swap_file_check
+
+- name: create swap file
+  become: yes
+  command: dd if=/dev/zero of="{{ swap_file }}" bs=1M count="{{ swap_add_mb }}"
+  when: not swap_file_check.stat.exists
+
+- name: set permissions on swap file
+  become: yes
+  file:
+    path: "{{ swap_file }}"
+    mode: 0600
+
+- name: format swap file
+  become: yes
+  command: mkswap {{ swap_file }}
+  when: not swap_file_check.stat.exists
+
+- name: add to fstab
+  become: yes
+  lineinfile:
+    dest: /etc/fstab
+    regexp: "{{ swap_file }}"
+    line: "{{ swap_file }} none swap sw 0 0"
+
+- name: turn on swap
+  become: yes
+  command: swapon -a
+
+- name: set swapiness
+  become: yes
+  sysctl:
+    name: vm.swappiness
+    value: "1"

roles/easyredmine/tasks/system.yml

@@ -1,4 +1,5 @@
 
+- include: addswap.yml
 
 - name: install system tools
   yum: name='{{ item }}'