From 8c722ed8f5d986e465b1e95f31faa2a733af4715 Mon Sep 17 00:00:00 2001
From: Michael Gugino <mgugino@redhat.com>
Date: Thu, 21 Dec 2017 15:39:48 -0500
Subject: Create swapoff module

Create custome ansible module 'swapoff' to idempotently
disable swap in /etc/fstab and also run swapoff.
---
 roles/openshift_node/tasks/main.yml                | 32 ++++------------------
 .../tasks/upgrade/config_changes.yml               | 28 ++++---------------
 roles/openshift_node/tasks/upgrade_pre.yml         | 13 ---------
 3 files changed, 11 insertions(+), 62 deletions(-)

(limited to 'roles/openshift_node')

diff --git a/roles/openshift_node/tasks/main.yml b/roles/openshift_node/tasks/main.yml
index 754ecacaf..f56f24e12 100644
--- a/roles/openshift_node/tasks/main.yml
+++ b/roles/openshift_node/tasks/main.yml
@@ -14,33 +14,11 @@
 
 #### Disable SWAP #####
 # https://docs.openshift.com/container-platform/3.4/admin_guide/overcommit.html#disabling-swap-memory
-- name: Check for swap usage
-  command: grep "^[^#].*swap" /etc/fstab
-  # grep: match any lines which don't begin with '#' and contain 'swap'
-  changed_when: false
-  failed_when: false
-  register: swap_result
-
-- when:
-    - swap_result.stdout_lines | length > 0
-    - openshift_disable_swap | default(true) | bool
-  block:
-    - name: Disable swap
-      command: swapoff --all
-
-    - name: Remove swap entries from /etc/fstab
-      replace:
-        dest: /etc/fstab
-        regexp: '(^[^#].*swap.*)'
-        replace: '# \1'
-        backup: yes
-
-    - name: Add notice about disabling swap
-      lineinfile:
-        dest: /etc/fstab
-        line: '# OpenShift-Ansible Installer disabled swap per overcommit guidelines'
-        state: present
-#### End Disable Swap Block ####
+# swapoff is a custom module in lib_utils that comments out swap entries in
+# /etc/fstab and runs swapoff -a, if necessary.
+- name: Disable swap
+  swapoff: {}
+  when: openshift_disable_swap | default(true) | bool
 
 - name: include node installer
   include_tasks: install.yml
diff --git a/roles/openshift_node/tasks/upgrade/config_changes.yml b/roles/openshift_node/tasks/upgrade/config_changes.yml
index dd9183382..15ac76f7d 100644
--- a/roles/openshift_node/tasks/upgrade/config_changes.yml
+++ b/roles/openshift_node/tasks/upgrade/config_changes.yml
@@ -27,28 +27,12 @@
     path: "/var/lib/cni/networks/openshift-sdn/"
     state: absent
 
-# Disable Swap Block (pre)
-- block:
-  - name: Remove swap entries from /etc/fstab
-    replace:
-      dest: /etc/fstab
-      regexp: '(^[^#].*swap.*)'
-      replace: '# \1'
-      backup: yes
-
-  - name: Add notice about disabling swap
-    lineinfile:
-      dest: /etc/fstab
-      line: '# OpenShift-Ansible Installer disabled swap per overcommit guidelines'
-      state: present
-
-  - name: Disable swap
-    command: swapoff --all
-
-  when:
-  - openshift_node_upgrade_swap_result | default(False) | bool
-  - openshift_disable_swap | default(true) | bool
-# End Disable Swap Block
+# https://docs.openshift.com/container-platform/3.4/admin_guide/overcommit.html#disabling-swap-memory
+# swapoff is a custom module in lib_utils that comments out swap entries in
+# /etc/fstab and runs swapoff -a, if necessary.
+- name: Disable swap
+  swapoff: {}
+  when: openshift_disable_swap | default(true) | bool
 
 - name: Apply 3.6 dns config changes
   yedit:
diff --git a/roles/openshift_node/tasks/upgrade_pre.yml b/roles/openshift_node/tasks/upgrade_pre.yml
index 3ae7dc6b6..aa1a75100 100644
--- a/roles/openshift_node/tasks/upgrade_pre.yml
+++ b/roles/openshift_node/tasks/upgrade_pre.yml
@@ -41,16 +41,3 @@
   vars:
     openshift_version: "{{ openshift_pkg_version | default('') }}"
   when: not openshift_is_containerized | bool
-
-# https://docs.openshift.com/container-platform/3.4/admin_guide/overcommit.html#disabling-swap-memory
-- name: Check for swap usage
-  command: grep "^[^#].*swap" /etc/fstab
-  # grep: match any lines which don't begin with '#' and contain 'swap'
-  changed_when: false
-  failed_when: false
-  register: swap_result
-
-# Set this fact here so we can use it during the next play, which is serial.
-- name: set_fact swap_result
-  set_fact:
-    openshift_node_upgrade_swap_result: "{{ swap_result.stdout_lines | length > 0 | bool }}"
-- 
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