Merge branch 'duhast-master'

Author: UnderGreen

README.md

@@ -14,6 +14,7 @@ mongodb_package: mongodb-org
 
 mongodb_force_wait_for_port: false                # When not forced, the role will wait for mongod port to become available only with systemd
 mongodb_pymongo_from_pip: false                   # Install latest PyMongo via PIP or package manager
+mongodb_disable_thp: true
 
 mongodb_manage_service: true
 

defaults/main.yml

@@ -3,6 +3,7 @@
 mongodb_package: mongodb-org
 mongodb_force_wait_for_port: false
 mongodb_pymongo_from_pip: false                   # Install latest PyMongo via PIP or package manager
+mongodb_disable_thp: true
 
 mongodb_manage_service: true
 

files/disable_thp.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+if test -f /sys/kernel/mm/transparent_hugepage/khugepaged/defrag; then
+  echo 0 > /sys/kernel/mm/transparent_hugepage/khugepaged/defrag
+fi
+if test -f /sys/kernel/mm/transparent_hugepage/defrag; then
+  echo never > /sys/kernel/mm/transparent_hugepage/defrag
+fi
+if test -f /sys/kernel/mm/transparent_hugepage/enabled; then
+  echo never > /sys/kernel/mm/transparent_hugepage/enabled
+fi

tasks/configure.yml

@@ -60,6 +60,18 @@
   template: src=mongod.conf.j2 dest=/etc/mongod.conf backup=yes owner=root group=root mode=0644
   register: config_result
 
+- name: Install disable_thp script
+  copy: src=disable_thp.sh dest=/usr/local/bin/disable_thp.sh mode='u=rwx,g=rx,o=rx'
+  when: ansible_os_family == 'Debian' and mongodb_disable_thp
+
+- name: Disable Linux transparent hugepages now
+  command: /usr/local/bin/disable_thp.sh
+  when: ansible_os_family == 'Debian' and mongodb_disable_thp
+
+- name: Disable Linux transparent hugepages on boot
+  lineinfile: dest=/etc/rc.local regexp='/usr/local/bin/disable_thp.sh' line='if test -f '/usr/local/bin/disable_thp.sh'; /usr/local/bin/disable_thp.sh; fi'
+  when: ansible_os_family == 'Debian' and mongodb_disable_thp
+
 - name: get pid of mongod
   command: pidof mongod
   register: mongod_new_pid