Filippo Giunchedi has submitted this change and it was merged.
Change subject: jheapdump: gdb-based heap dump for JVM
......................................................................
jheapdump: gdb-based heap dump for JVM
create a java::tools class to include this tool since it might get used
elsewhere beside elasticsearch module
Change-Id: I7fc40ff5a0ebd29824f9dbf76bf3d989343ce515
---
M modules/elasticsearch/manifests/packages.pp
A modules/java/files/jheapdump
A modules/java/manifests/tools.pp
3 files changed, 96 insertions(+), 0 deletions(-)
Approvals:
Filippo Giunchedi: Verified; Looks good to me, approved
Manybubbles: Looks good to me, but someone else must approve
diff --git a/modules/elasticsearch/manifests/packages.pp
b/modules/elasticsearch/manifests/packages.pp
index 4886476..98b0dab 100644
--- a/modules/elasticsearch/manifests/packages.pp
+++ b/modules/elasticsearch/manifests/packages.pp
@@ -3,6 +3,8 @@
# Provisions Elasticsearch package and dependencies.
#
class elasticsearch::packages {
+ include ::java::tools
+
if ! defined ( Package['openjdk-7-jdk'] ) {
package { 'openjdk-7-jdk':
ensure => 'present',
diff --git a/modules/java/files/jheapdump b/modules/java/files/jheapdump
new file mode 100644
index 0000000..acbfeae
--- /dev/null
+++ b/modules/java/files/jheapdump
@@ -0,0 +1,73 @@
+#!/bin/bash
+
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 51
+# Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+# Copyright 2014 Filippo Giunchedi <fgiunch...@wikimedia.org>
+# Copyright 2014 Wikimedia Foundation
+
+set -e
+set -u
+
+pid=${1:-}
+path=${2:-}
+
+function usage_exit() {
+ echo "usage: $0 PID BASE_NAME"
+ echo " capture a core from PID into BASE_NAME.core.PID"
+ echo " and extract java heap dump into BASE_NAME.hprof.PID"
+ exit 1
+}
+
+if [ -z "$pid" -o -z "$path" ]; then
+ usage_exit
+fi
+
+jmap=${JMAP:-$(command -vp jmap)}
+gcore=${GCORE:-$(command -vp gcore)}
+java=${JAVA:-$(command -vp java)}
+
+if [ -z "$jmap" -o -z "$gcore" -o -z "$java" ]; then
+ echo "jmap or gcore or java not found"
+ usage_exit
+fi
+
+if [ -d "$path" ]; then
+ echo "BASE_NAME can't be a directory"
+ usage_exit
+fi
+
+core_path="${path}.core.${pid}"
+heap_path="${path}.hprof.${pid}"
+jmap_options="-dump:format=b,file=${heap_path}"
+# remove trailing ".${pid}"
+gcore_options="-o ${core_path%*.${pid}}"
+
+# XXX check disk space
+if [ ! -e "$core_path" ]; then
+ echo "dumping core from ${pid} into ${core_path}"
+ echo "WARNING: this file can get very big!"
+ echo " make sure there is enough disk space available"
+ sudo ${gcore} ${gcore_options} ${pid}
+fi
+
+if [ ! -e "$heap_path" ]; then
+ echo "writing heap profile to ${heap_path}"
+ sudo ${jmap} ${jmap_options} "${java}" "${core_path}"
+fi
+
+echo "done."
+
+echo "NOTE: the core file at ${core_path}, if unused remove with:"
+echo " sudo rm ${core_path}"
diff --git a/modules/java/manifests/tools.pp b/modules/java/manifests/tools.pp
new file mode 100644
index 0000000..61c6273
--- /dev/null
+++ b/modules/java/manifests/tools.pp
@@ -0,0 +1,21 @@
+# == Class: java::tools
+#
+# This class aims at providing convenience tools to be used on systems where
+# java (JRE or JDK) is installed.
+
+class java::tools {
+ if ! defined ( Package['gdb'] ) {
+ package { 'gdb':
+ ensure => present
+ }
+ }
+
+ # NOTE jmap is used, thus requiring a jdk to be installed
+ file { '/usr/local/bin/jheapdump':
+ ensure => file,
+ owner => root,
+ group => root,
+ mode => '0555',
+ source => 'puppet:///modules/java/jheapdump',
+ }
+}
--
To view, visit https://gerrit.wikimedia.org/r/170996
To unsubscribe, visit https://gerrit.wikimedia.org/r/settings
Gerrit-MessageType: merged
Gerrit-Change-Id: I7fc40ff5a0ebd29824f9dbf76bf3d989343ce515
Gerrit-PatchSet: 4
Gerrit-Project: operations/puppet
Gerrit-Branch: production
Gerrit-Owner: Filippo Giunchedi <fgiunch...@wikimedia.org>
Gerrit-Reviewer: Chad <ch...@wikimedia.org>
Gerrit-Reviewer: Filippo Giunchedi <fgiunch...@wikimedia.org>
Gerrit-Reviewer: Manybubbles <never...@wikimedia.org>
Gerrit-Reviewer: Ottomata <o...@wikimedia.org>
Gerrit-Reviewer: jenkins-bot <>
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