如何保持弹性搜索在 Linux 服务器上运行
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【中文标题】如何保持弹性搜索在 Linux 服务器上运行【英文标题】:How to keep elastic search running on linux server 【发布时间】:2015-11-24 06:02:38 【问题描述】:我正在通过 Putty 客户端使用 ssh 访问我的服务器,但是当我的 putty 处于非活动状态或我关闭它时,弹性搜索停止。我想让它一直运行。我怎样才能做到这一点?
【问题讨论】:
再次登录时如何重启? 当我再次登录时,我开始弹性搜索....使用命令 ./bin/elasticsearch 【参考方案1】:您遇到的问题是 elasticsearch 没有作为守护程序(服务器)启动。相反,您可以像启动普通程序一样启动它。因此,当您停止 SSH 会话时,程序将停止运行。
为了让elasticsearch在服务器本身重启时启动,你需要在服务器启动时添加elasticsearch。
您没有说明您在服务器上运行的操作系统。假设它是一个 Debian(例如 Ubuntu)系统),您必须创建一个可以放在目录 /etc/init.d 中的文件。
我已经从下面我自己的服务器复制了文件。您可能已经拥有它。 查找文件 /etc/init.d/elasticsearch
$ more /etc/init.d/elasticsearch
获得文件后,您可以运行命令
sudo update-rc.d elasticsearch defaults 95 10
这会将elasticsearch“安装”为服务。
要启动和停止服务,您可以运行以下命令:
sudo service elasticsearch start
sudo service elasticsearch stop
如果您还没有该文件,请在下面。
#!/bin/sh
#
# /etc/init.d/elasticsearch -- startup script for Elasticsearch
#
# Written by Miquel van Smoorenburg <miquels@cistron.nl>.
# Modified for Debian GNU/Linux by Ian Murdock <imurdock@gnu.ai.mit.edu>.
# Modified for Tomcat by Stefan Gybas <sgybas@debian.org>.
# Modified for Tomcat6 by Thierry Carrez <thierry.carrez@ubuntu.com>.
# Additional improvements by Jason Brittain <jason.brittain@mulesoft.com>.
# Modified by Nicolas Huray for Elasticsearch <nicolas.huray@gmail.com>.
#
### BEGIN INIT INFO
# Provides: elasticsearch
# Required-Start: $network $remote_fs $named
# Required-Stop: $network $remote_fs $named
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Starts elasticsearch
# Description: Starts elasticsearch using start-stop-daemon
### END INIT INFO
PATH=/bin:/usr/bin:/sbin:/usr/sbin
NAME=elasticsearch
DESC="Elasticsearch Server"
DEFAULT=/etc/default/$NAME
if [ `id -u` -ne 0 ]; then
echo "You need root privileges to run this script"
exit 1
fi
. /lib/lsb/init-functions
if [ -r /etc/default/rcS ]; then
. /etc/default/rcS
fi
# The following variables can be overwritten in $DEFAULT
# Run Elasticsearch as this user ID and group ID
ES_USER=elasticsearch
ES_GROUP=elasticsearch
# The first existing directory is used for JAVA_HOME (if JAVA_HOME is not defined in $DEFAULT)
JDK_DIRS="/usr/lib/jvm/java-8-oracle/ /usr/lib/jvm/j2sdk1.8-oracle/ /usr/lib/jvm/jdk-7-oracle-x64 /usr/lib/jvm/java-7-oracle /usr/lib/jvm/j2sdk1.7-oracle/ /usr/lib/jvm/jav
a-7-openjdk /usr/lib/jvm/java-7-openjdk-amd64/ /usr/lib/jvm/java-7-openjdk-armhf /usr/lib/jvm/java-7-openjdk-i386/ /usr/lib/jvm/default-java"
# Look for the right JVM to use
for jdir in $JDK_DIRS; do
if [ -r "$jdir/bin/java" -a -z "$JAVA_HOME" ]; then
JAVA_HOME="$jdir"
fi
done
export JAVA_HOME
# Directory where the Elasticsearch binary distribution resides
ES_HOME=/usr/share/$NAME
# Heap size defaults to 256m min, 1g max
# Set ES_HEAP_SIZE to 50% of available RAM, but no more than 31g
#ES_HEAP_SIZE=2g
# Heap new generation
#ES_HEAP_NEWSIZE=
# max direct memory
#ES_DIRECT_SIZE=
# Additional Java OPTS
#ES_JAVA_OPTS=
# Maximum number of open files
MAX_OPEN_FILES=65535
# Maximum amount of locked memory
#MAX_LOCKED_MEMORY=
# Elasticsearch log directory
LOG_DIR=/var/log/$NAME
# Elasticsearch data directory
DATA_DIR=/var/lib/$NAME
# Elasticsearch work directory
WORK_DIR=/tmp/$NAME
# Elasticsearch configuration directory
CONF_DIR=/etc/$NAME
# Elasticsearch configuration file (elasticsearch.yml)
CONF_FILE=$CONF_DIR/elasticsearch.yml
# Maximum number of VMA (Virtual Memory Areas) a process can own
MAX_MAP_COUNT=262144
# End of variables that can be overwritten in $DEFAULT
# overwrite settings from default file
if [ -f "$DEFAULT" ]; then
. "$DEFAULT"
fi
# Define other required variables
PID_FILE=/var/run/$NAME.pid
DAEMON=$ES_HOME/bin/elasticsearch
DAEMON_OPTS="-d -p $PID_FILE --default.config=$CONF_FILE --default.path.home=$ES_HOME --default.path.logs=$LOG_DIR --default.path.data=$DATA_DIR --default.path.work=$WORK_
DIR --default.path.conf=$CONF_DIR"
export ES_HEAP_SIZE
export ES_HEAP_NEWSIZE
export ES_DIRECT_SIZE
export ES_JAVA_OPTS
# Check DAEMON exists
test -x $DAEMON || exit 0
checkJava()
if [ -x "$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
case "$1" in
start)
checkJava
if [ -n "$MAX_LOCKED_MEMORY" -a -z "$ES_HEAP_SIZE" ]; then
log_failure_msg "MAX_LOCKED_MEMORY is set - ES_HEAP_SIZE must also be set"
exit 1
fi
log_daemon_msg "Starting $DESC"
pid=`pidofproc -p $PID_FILE elasticsearch`
if [ -n "$pid" ] ; then
log_begin_msg "Already running."
log_end_msg 0
exit 0
fi
# Prepare environment
mkdir -p "$LOG_DIR" "$DATA_DIR" "$WORK_DIR" && chown "$ES_USER":"$ES_GROUP" "$LOG_DIR" "$DATA_DIR" "$WORK_DIR"
touch "$PID_FILE" && chown "$ES_USER":"$ES_GROUP" "$PID_FILE"
if [ -n "$MAX_OPEN_FILES" ]; then
ulimit -n $MAX_OPEN_FILES
fi
if [ -n "$MAX_LOCKED_MEMORY" ]; then
ulimit -l $MAX_LOCKED_MEMORY
fi
if [ -n "$MAX_MAP_COUNT" -a -f /proc/sys/vm/max_map_count ]; then
sysctl -q -w vm.max_map_count=$MAX_MAP_COUNT
fi
# Start Daemon
start-stop-daemon --start -b --user "$ES_USER" -c "$ES_USER" --pidfile "$PID_FILE" --exec $DAEMON -- $DAEMON_OPTS
return=$?
if [ $return -eq 0 ]
then
i=0
timeout=10
# Wait for the process to be properly started before exiting
until cat "$PID_FILE" | xargs kill -0; >/dev/null 2>&1
do
sleep 1
i=$(($i + 1))
[ $i -gt $timeout ] && log_end_msg 1
done
else
log_end_msg $return
fi
;;
stop)
log_daemon_msg "Stopping $DESC"
if [ -f "$PID_FILE" ]; then
start-stop-daemon --stop --pidfile "$PID_FILE" \
--user "$ES_USER" \
--retry=TERM/20/KILL/5 >/dev/null
if [ $? -eq 1 ]; then
log_progress_msg "$DESC is not running but pid file exists, cleaning up"
elif [ $? -eq 3 ]; then
PID="`cat $PID_FILE`"
log_failure_msg "Failed to stop $DESC (pid $PID)"
exit 1
fi
rm -f "$PID_FILE"
else
log_progress_msg "(not running)"
fi
log_end_msg 0
;;
status)
status_of_proc -p $PID_FILE elasticsearch elasticsearch && exit 0 || exit $?
;;
restart|force-reload)
if [ -f "$PID_FILE" ]; then
$0 stop
sleep 1
fi
$0 start
;;
*)
log_success_msg "Usage: $0 start|stop|restart|force-reload|status"
exit 1
;;
esac
exit 0
【讨论】:
我应该只是指向文档:elastic.co/guide/en/elasticsearch/reference/current/… 这很好,但是当 ES 不时发生崩溃时并不能解决问题。 注明。 OP 是从命令行手动启动 ES。您可以使用“curl 127.0.0.1:9200”或“sudo service elasticsearch stop”将返回服务状态,无论哪种方式,您都必须解析该值。我确实认为它超出了原始问题的范围,也许是主题本身,【参考方案2】:我需要使用 debian 包安装 ElasticSearch。详情看这里https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-elasticsearch-on-ubuntu-14-04
【讨论】:
为什么投反对票?到目前为止,从 debian 软件包安装是设置 Elasticsearch 并准备好在 Ubuntu 上运行的最简单方法。它从一开始就将 ES 安装为服务,您可以在安装后立即使用sudo service elasticsearch [action]
(除非您想调整一些设置)。【参考方案3】:
如果你没有 sudo 访问权限,可以使用nohup
确保它在连接断开后继续运行。
只需运行nohup [start elasticsearch command] > es.out &
。输出将附加到 es.out,您可以在文本编辑器中阅读,或使用tail -f nohup.out
作为提要获取。
希望这会有所帮助。
【讨论】:
【参考方案4】:以下对我有用:( elasticsearch-7.8.0 )
-
导航到
elasticsearch-7.8.0/bin
目录
运行nohup ./elasticsearch &
它将在后台启动弹性搜索,并将日志附加到同一目录下的 nohup.out 文件中。
【讨论】:
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