背景

我电脑环境的jdk是1.7，而需要的版本为1.8. 因此需要给elasticsearch指定jdk1.8(不需要将jdk1.8配置到环境变量).

一、下载

1、jdk:点击下载jdk1.8

2、解压

tar -xvf xxx1.8.tar.gz

二、配置

1、修改elasticsearch启动脚本

打开 elasticsearchHOME/bin/elasticsearch 编辑

[root]# vim bin/elasticsearch

添加以下代码

export JAVA_HOME=/home/hiekay/jdk1.8.0_181/ (此处配置的为刚下的1.8的配置目录)

export PATH=$JAVA_HOME/bin:$PATH

if [ -x "$JAVA_HOME/bin/java" ]; then

JAVA="/home/yutao/jdk1.8.0_121/bin/java"

else

JAVA=`which java`

fi

完整配置文件

#!/bin/bash

CONTROLLING STARTUP:

This script relies on a few environment variables to determine startup

behavior, those variables are:

ES_PATH_CONF -- Path to config directory

ES_JAVA_OPTS -- External Java Opts on top of the defaults set

Optionally, exact memory values can be set using the `ES_JAVA_OPTS`. Note that

the Xms and Xmx lines in the JVM options file must be commented out. Example

values are "512m", and "10g".

ES_JAVA_OPTS="-Xms8g -Xmx8g" ./bin/elasticsearch

#配置自己的jdk1.8

export JAVA_HOME=/home/hiekay/jdk1.8.0_181/

export PATH=$JAVA_HOME/bin:$PATH

source "`dirname "$0"`"/elasticsearch-env

ES_JVM_OPTIONS="$ES_PATH_CONF"/jvm.options

JVM_OPTIONS=`"$JAVA" -cp "$ES_CLASSPATH" org.elasticsearch.tools.launchers.JvmOptionsParser "$ES_JVM_OPTIONS"`

ES_JAVA_OPTS="${JVM_OPTIONS//\$\{ES_TMPDIR\}/$ES_TMPDIR} $ES_JAVA_OPTS"

#我添加的jdk判断

if [ -x "$JAVA_HOME/bin/java" ]; then

JAVA="/home/hiekay/jdk1.8.0_181/bin/java"

else

JAVA=`which java`

fi

cd "$ES_HOME"

manual parsing to find out, if process should be detached

if ! echo $* | grep -E '(^-d |-d$| -d |--daemonize$|--daemonize )' > /dev/null; then

exec \

"$JAVA" \

$ES_JAVA_OPTS \

-Des.path.home="$ES_HOME" \

-Des.path.conf="$ES_PATH_CONF" \

-Des.distribution.flavor="$ES_DISTRIBUTION_FLAVOR" \

-Des.distribution.type="$ES_DISTRIBUTION_TYPE" \

-cp "$ES_CLASSPATH" \

org.elasticsearch.bootstrap.Elasticsearch \

"$@"

else

exec \

"$JAVA" \

$ES_JAVA_OPTS \

-Des.path.home="$ES_HOME" \

-Des.path.conf="$ES_PATH_CONF" \

-Des.distribution.flavor="$ES_DISTRIBUTION_FLAVOR" \

-Des.distribution.type="$ES_DISTRIBUTION_TYPE" \

-cp "$ES_CLASSPATH" \

org.elasticsearch.bootstrap.Elasticsearch \

"$@" \

retval=$?

pid=$!

[ $retval -eq 0 ] || exit $retval

if [ ! -z "$ES_STARTUP_SLEEP_TIME" ]; then

sleep $ES_STARTUP_SLEEP_TIME

fi

if ! ps -p $pid > /dev/null ; then

exit 1

fi

exit 0

fi

exit $?