#!/bin/sh
# OPTIONS:
# -d: daemonize, start in the background
# -p : log the pid to a file (useful to kill it later)
# CONTROLLING STARTUP:
#
# This script relies on few environment variables to determine startup
# behavior, those variables are:
#
# ES_CLASSPATH -- A Java classpath containing everything necessary to run.
# JAVA_OPTS -- Additional arguments to the JVM for heap size, etc
# ES_JAVA_OPTS -- External Java Opts on top of the defaults set
#
#
# Optionally, exact memory values can be set using the following values, note,
# they can still be set using the `ES_JAVA_OPTS`. Sample format include "512m", and "10g".
#
# ES_HEAP_SIZE -- Sets both the minimum and maximum memory to allocate (recommended)
#
# As a convenience, a fragment of shell is sourced in order to set one or
# more of these variables. This so-called `include' can be placed in a
# number of locations and will be searched for in order. The lowest
# priority search path is the same directory as the startup script, and
# since this is the location of the sample in the project tree, it should
# almost work Out Of The Box.
#
# Any serious use-case though will likely require customization of the
# include. For production installations, it is recommended that you copy
# the sample to one of /usr/share/elasticsearch/elasticsearch.in.sh,
# /usr/local/share/elasticsearch/elasticsearch.in.sh, or
# /opt/elasticsearch/elasticsearch.in.sh and make your modifications there.
#
# Another option is to specify the full path to the include file in the
# environment. For example:
#
# $ ES_INCLUDE=/path/to/in.sh elasticsearch -p /var/run/es.pid
#
# Note: This is particularly handy for running multiple instances on a
# single installation, or for quick tests.
#
# If you would rather configure startup entirely from the environment, you
# can disable the include by exporting an empty ES_INCLUDE, or by
# ensuring that no include files exist in the aforementioned search list.
# Be aware that you will be entirely responsible for populating the needed
# environment variables.
# Maven will replace the project.name with elasticsearch below. If that
# hasn't been done, we assume that this is not a packaged version and the
# user has forgotten to run Maven to create a package.
IS_PACKAGED_VERSION='elasticsearch'
if [ "$IS_PACKAGED_VERSION" != "elasticsearch" ]; then
cat >&2 << EOF
Error: You must build the project with Maven or download a pre-built package
before you can run Elasticsearch. See 'Building from Source' in README.textile
or visit http://www.elasticsearch.org/download to get a pre-built package.
EOF
exit 1
fi
CDPATH=""
SCRIPT="$0"
# SCRIPT may be an arbitrarily deep series of symlinks. Loop until we have the concrete path.
while [ -h "$SCRIPT" ] ; do
ls=`ls -ld "$SCRIPT"`
# Drop everything prior to ->
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
SCRIPT="$link"
else
SCRIPT=`dirname "$SCRIPT"`/"$link"
fi
done
# determine elasticsearch home
ES_HOME=`dirname "$SCRIPT"`/..
# make ELASTICSEARCH_HOME absolute
ES_HOME=`cd "$ES_HOME"; pwd`
# If an include wasn't specified in the environment, then search for one...
if [ "x$ES_INCLUDE" = "x" ]; then
# Locations (in order) to use when searching for an include file.
for include in /usr/share/elasticsearch/elasticsearch.in.sh \
/usr/local/share/elasticsearch/elasticsearch.in.sh \
/opt/elasticsearch/elasticsearch.in.sh \
~/.elasticsearch.in.sh \
"`dirname "$0"`"/elasticsearch.in.sh; do
if [ -r "$include" ]; then
. "$include"
break
fi
done
# ...otherwise, source the specified include.
elif [ -r "$ES_INCLUDE" ]; then
. "$ES_INCLUDE"
fi
if [ -x "$JAVA_HOME/bin/java" ]; then
JAVA="$JAVA_HOME/bin/java"
else
JAVA=`which java`
fi
if [ ! -x "$JAVA" ]; then
echo "Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME"
exit 1
fi
if [ -z "$ES_CLASSPATH" ]; then
echo "You must set the ES_CLASSPATH var" >&2
exit 1
fi
# Special-case path variables.
case `uname` in
CYGWIN*)
ES_CLASSPATH=`cygpath -p -w "$ES_CLASSPATH"`
ES_HOME=`cygpath -p -w "$ES_HOME"`
;;
esac
launch_service()
{
pidpath=$1
daemonized=$2
props=$3
es_parms="-Delasticsearch"
if [ "x$pidpath" != "x" ]; then
es_parms="$es_parms -Des.pidfile=$pidpath"
fi
# The es-foreground option will tell Elasticsearch not to close stdout/stderr, but it's up to us not to daemonize.
if [ "x$daemonized" = "x" ]; then
es_parms="$es_parms -Des.foreground=yes"
exec "$JAVA" $JAVA_OPTS $ES_JAVA_OPTS $es_parms -Des.path.home="$ES_HOME" -cp "$ES_CLASSPATH" $props \
org.elasticsearch.bootstrap.Elasticsearch
# exec without running it in the background, makes it replace this shell, we'll never get here...
# no need to return something
else
# Startup Elasticsearch, background it, and write the pid.
exec "$JAVA" $JAVA_OPTS $ES_JAVA_OPTS $es_parms -Des.path.home="$ES_HOME" -cp "$ES_CLASSPATH" $props \
org.elasticsearch.bootstrap.Elasticsearch <&- &
return $?
fi
}
# Parse any long getopt options and put them into properties before calling getopt below
# Be dash compatible to make sure running under ubuntu works
ARGV=""
while [ $# -gt 0 ]
do
case $1 in
--*=*) properties="$properties -Des.${1#--}"
shift 1
;;
--*) properties="$properties -Des.${1#--}=$2"
shift 2
;;
*) ARGV="$ARGV $1" ; shift
esac
done
# Parse any command line options.
args=`getopt vdhp:D:X: $ARGV`
eval set -- "$args"
while true; do
case $1 in
-v)
"$JAVA" $JAVA_OPTS $ES_JAVA_OPTS $es_parms -Des.path.home="$ES_HOME" -cp "$ES_CLASSPATH" $props \
org.elasticsearch.Version
exit 0
;;
-p)
pidfile="$2"
shift 2
;;
-d)
daemonized="yes"
shift
;;
-h)
echo "Usage: $0 [-d] [-h] [-p pidfile]"
exit 0
;;
-D)
properties="$properties -D$2"
shift 2
;;
-X)
properties="$properties -X$2"
shift 2
;;
--)
shift
break
;;
*)
echo "Error parsing argument $1!" >&2
exit 1
;;
esac
done
# Start up the service
launch_service "$pidfile" "$daemonized" "$properties"
exit $?
确保增加机器中可打开的文件描述符个数,建议在32k~64k。为了能检测进程可打开的文件描述符的个数,在es启动时添加参数 -Des.max-open-files 并设置为 true ,这样可以显示进程可以打开的文件描述符的个数。
或者,你也可以检索节点的max_file_descriptors信息,通过使用 Node Info API:
curl localhost:9200/_nodes/process?pretty
Linux 内核会为文件系统缓存分配尽可能多的内存,它会急切的将未使用的应用程序的内存换出。这样就可能导致elasticsearch进程内存被换出。内存换入换出对elasticsearch来说是非常有害于性能和稳定性的,所以我们应该尽量避免。有三个选项可供使用:
- 禁用交换
最简单的方法是完全禁用内存交换,通常Elasticsearch是在一个机器上运行的唯一服务,它的内存使用量由ES_HEAP_SIZE环境变量控制。应该没有必要启用交换。 在Linux系统中,你可以暂时禁用交换:sudo swapoff -a
也可以永久的禁用交换,编辑/etc/fstab文件,注释掉包含swap词的所有行。
- 配置 swappiness
通过将 vim.swapniess 设置为0可以使系统内核在一般情况下不将es进程占用的内存交换,但是在紧急情况下允许交换。在3.5 -rc1 以及以上的内核中,如果将swapniess 设置为1 会导致OOM直接杀死进程,而不会交换。这种情况下应该将swapniess设置为1,以保证在紧急情况下仍能进行交换。
- mlockall
这种配置方法仅适用于 Linux/Unix系统。使用 mlockall锁住elasticsearch进程使用的内存空间。这样也可以禁止此内存空间被换出。如果采用这种方式的话需要在 config/elasticsearch.yml 文件中添加:
bootstrap.mlockall: true
在启动elasticsearch后你可以通过查看mlockall域来查看内存是否被锁住:
curl localhost:9200/_nodes/process?pretty
如果看到mlockall选项为false的话,说明此设置没有应用成功,通常情况下是因为启动elasticsearch的用户没有锁住内存的权限,这时可以切换到root重新启动。另外一种原因就是系统的临时目录/tmp挂载时启用了noexec选项,这时为elasticsearch重新指定临时目录就可以了:
./bin/elasticsearch -Djna.tmpdir=/path/to/new/dir
mlockall 可能会导致JVM或者shell会话退出,当它尝试去分配更多内存(已经超出了可用内存)的时候。
path:
logs: /var/log/elasticsearch
data: /var/data/elasticsearch
cluster:
name:
node:
name:
{
"network" : {
"host" : "10.0.0.4"
}
}
$ elasticsearch -Des.network.host=10.0.0.4
{
"network" : {
"host" : "${ES_NET_HOST}"
}
}
$ elasticsearch -Des.config=/path/to/config/file
$ curl -XPUT http://localhost:9200/kimchy/ -d \
'
index :
store:
type: memory
'
index :
store:
type: memory
$ elasticsearch -Des.index.store.type=memory