Create swapfile for bootstrap playbook

Ensure all servers have a swapfile.

Change-Id: I6cd38061ce58d275e98fcbc0f82f946cb4e02554
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

playbooks/bootstrap/roles/swap/defaults/main.yaml

@@ -0,0 +1,20 @@
+# Copyright 2019 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+---
+swap_file_group: root
+swap_file_mode: 0600
+swap_file_owner: root
+swap_file_path: /root/swapfile
+
+swap_size_mb: "{{ ansible_memtotal_mb * 2 }}"

playbooks/bootstrap/roles/swap/tasks/main.yaml

@@ -0,0 +1,54 @@
+# Copyright 2019 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+---
+- name: Create swapfile
+  become: true
+  command: "fallocate -l {{ swap_size_mb }}M {{ swap_file_path }}"
+  args:
+    creates: "{{ swap_file_path }}"
+
+- name: Ensure swapfile permissions
+  become: true
+  file:
+    group: "{{ swap_file_group }}"
+    mode: "{{ swap_file_mode }}"
+    owner: "{{ swap_file_owner }}"
+    path: "{{ swap_file_path }}"
+
+- name: Register swap status
+  shell: "swapon -s | grep {{ swap_file_path }}"
+  changed_when: false
+  failed_when: _swap_status.rc > 1
+  register: _swap_status
+
+- name: Format swapfile
+  become: true
+  command: "mkswap {{ swap_file_path }}"
+  when: not _swap_status.stdout
+
+- name: Add swapfile to fstab
+  become: true
+  mount:
+    path: swap
+    src: "{{ swap_file_path }}"
+    fstype: swap
+    opts: defaults
+    passno: 0
+    dump: 0
+    state: present
+
+- name: Enable swapfile
+  become: true
+  command: swapon -a
+  changed_when: false

playbooks/bootstrap/site.yaml

@@ -19,6 +19,10 @@
       include_role:
         name: users
 
+    - name: Setup swap role
+      include_role:
+        name: swap
+
     - name: Setup openstack.virtualenv role
       include_role:
         name: openstack.virtualenv

tox.ini

@@ -13,7 +13,7 @@ whitelist_externals = bash
 commands =
   yamllint -s .
   flake8
-  bash -c "ansible-lint -x 405 playbooks/*/*.yaml"
+  bash -c "ansible-lint -x 405 -x 306 playbooks/*/*.yaml"
 
 [testenv:venv]
 basepython = python3