Merge pull request #2381 from edx/derf/hugepages_upstart_script

hugepages upstart script

playbooks/roles/mongo_3_0/files/disable-transparent-hugepages

-#!/bin/sh
-### BEGIN INIT INFO
-# Provides:          disable-transparent-hugepages
-# Required-Start:    $local_fs
-# Required-Stop:
-# X-Start-Before:    mongod mongodb-mms-automation-agent
-# Default-Start:     2 3 4 5
-# Default-Stop:      0 1 6
-# Short-Description: Disable Linux transparent huge pages
-# Description:       Disable Linux transparent huge pages, to improve
-#                    database performance.
-### END INIT INFO
-
-case $1 in
-  start)
-    if [ -d /sys/kernel/mm/transparent_hugepage ]; then
-      thp_path=/sys/kernel/mm/transparent_hugepage
-    elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then
-      thp_path=/sys/kernel/mm/redhat_transparent_hugepage
-    else
-      return 0
-    fi
-
-    echo 'never' > ${thp_path}/enabled
-    echo 'never' > ${thp_path}/defrag
-
-    unset thp_path
-    ;;
-  stop)
-    if [ -d /sys/kernel/mm/transparent_hugepage ]; then
-      thp_path=/sys/kernel/mm/transparent_hugepage
-    elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then
-      thp_path=/sys/kernel/mm/redhat_transparent_hugepage
-    else
-      return 0
-    fi
-
-    echo 'always' > ${thp_path}/enabled
-    echo 'always' > ${thp_path}/defrag
-
-    unset thp_path
-    ;;
-  status)
-    if [ -d /sys/kernel/mm/transparent_hugepage ]; then
-      thp_path=/sys/kernel/mm/transparent_hugepage
-    elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then
-      thp_path=/sys/kernel/mm/redhat_transparent_hugepage
-    else
-      return 0
-    fi
-
-    case $(cat ${thp_path}/enabled | sed -e 's/.*\[//' -e 's/\].*//') in
-      always)
-        echo "always"
-        return 1
-        ;;
-      madvise)
-        echo "madvise"
-        return 1
-        ;;
-      never)
-        echo "never"
-        return 0
-        ;;
-    esac
-    unset thp_path
-    ;;
-esac

playbooks/roles/mongo_3_0/files/disable-transparent-hugepages.conf

+description     "set transparent hugepage to never"
+
+start on starting mongod
+task
+
+script
+  env thp_path=/sys/kernel/mm/transparent_hugepage
+
+  exec echo 'never' > ${thp_path}/enabled
+  exec echo 'never' > ${thp_path}/defrag
+end script

playbooks/roles/mongo_3_0/tasks/main.yml

@@ -23,10 +23,19 @@
     force=yes
   when: mongodb_needs_upgrade.stat.exists and not MONGO_CLUSTERED
 
+- name: remove old init script for hugepages
+  file: >
+    path=/etc/init.d/disable-transparent-hugepages
+    state=absent
+  tags:
+    - "hugepages"
+    - "install"
+    - "install:system-requirements"
+
 - name: disable transparent huge pages on startup (http://docs.mongodb.org/manual/tutorial/transparent-huge-pages/)
   copy: >
-    src=disable-transparent-hugepages
-    dest=/etc/init.d/disable-transparent-hugepages
+    src=disable-transparent-hugepages.conf
+    dest=/etc/init/disable-transparent-hugepages.conf
     owner=root
     group=root
     mode=0755