1、搭建ES7.10.0集群

一、规划
注：实际生产环境中，角色最好分开，单独的两个master和两个client，配置不用很高，不用存储,kibana也单独部署

1. es01
   master data
   192.168.18.11
   2 12G 100G

2. es02
   master data
   192.168.18.12
   2 12G 100G

3. es03(kibana)
   client
   192.168.18.13
   2 8G 30G

二、部署（centos7）
注意修改脚本个性化的配置
1、部署jdk，推荐jdk11
1.1、将jdk上传至/usr/local/目录下
1.2、使用root用户复制执行以下脚本
--自动部署脚本--

#!/bin/bash
#要安装的jdk路径
jdkpath=/usr/local/java/
#jdk压缩包所在的路径
jdkfile=/usr/local/
#jdk压缩包的名字
jdkname=openjdk-11.0.2_linux-x64_bin.tar.gz

mkdir $jdkpath
cp $jdkfile/$jdkname $jdkpath
cd $jdkpath
tar -xzvf $jdkname
rm $jdkname
echo `ls`
dirname=`ls`
echo "#java" >> /etc/bashrc
echo "export JAVA_HOME=$jdkpath/$dirname" >>   /etc/bashrc
echo "export PATH=\$PATH:\$JAVA_HOME/bin:\$JAVA_HOME/jre/bin" >>  /etc/bashrc
echo "export CLASSPATH=.:\$JAVA_HOME/lib:\$JAVA_HOME/jre/lib" >>  /etc/bashrc

 ln -s /usr/local/java/jdk-11.0.2/bin/java /usr/bin/java

1.3、执行命令

source /etc/bashrc & java -version

2、es01
1.1、上传安装包至/usr/local/
下载地址
https://www.elastic.co/cn/downloads/elasticsearch

1.2、部署脚本
--生产环境建议单独磁盘，单独建立分区逻辑卷挂载目录--

#!/bin/bash
#安装es
echo  "安装ES"
cd /usr/local/
rpm -ivh elasticsearch-7.10.0-x86_64.rpm

#准备数据目录
echo "创建es目录"
mkdir -p /es_data/{data,log}
ls -l / | grep es_data
ls -l /es_data/
echo  "配置目录所属"
chown elasticsearch:elasticsearch /es_data/ -R
ls -l / | grep es_data
ls -l /es_data/



#jvm优化
echo  "修改JVM参数"
cp /etc/elasticsearch/jvm.options{,.bak}
#设置堆内存6g=总内存*50%
sed -i "s/^-Xms1g/-Xms6g/" /etc/elasticsearch/jvm.options && sed -i "s/^-Xmx1g/-Xmx6g/" /etc/elasticsearch/jvm.options
echo "JVM"
cat /etc/elasticsearch/jvm.options | grep "^-Xm"
#减少新生代晋升到老年代时停顿，会使得启动慢上一点，但后面访问时会更流畅
sed -i "s/^## GC configuration/## GC configuration\n8-13:-XX:+AlwaysPreTouch/" /etc/elasticsearch/jvm.options

#系统优化
echo "关闭swap交换分区"
cp /etc/fstab{,.bak}
sed -i "s/^\/dev\/mapper\/centos-swap/#\/dev\/mapper\/centos-swap/" /etc/fstab
cat /etc/fstab | grep "swap"
echo vm.swappiness=1 >> /etc/sysctl.conf
echo "设置系统最大打开文件描述符数为655360"
echo "fs.file-max=655360" >> /etc/sysctl.conf
echo "限制一个进程可以用于VM（虚拟内存区域大小）为262144"
echo "vm.max_map_count=262144" >> /etc/sysctl.conf
echo "--/etc/sysctl.conf--"
cat  /etc/sysctl.conf |grep "^[a-z]"

echo "优化批量请求"
echo '* soft nproc 32000' >> /etc/security/limits.conf
echo '* hard nproc 32000' >> /etc/security/limits.conf
echo '* soft nofile 65536' >> /etc/security/limits.conf
echo '* hard nofile 65536' >> /etc/security/limits.conf
echo '* soft memlock unlimited' >> /etc/security/limits.conf
echo '* hard memlock unlimited' >> /etc/security/limits.conf
echo "--/etc/security/limits.conf--"
cat /etc/security/limits.conf | grep "^\*"

echo "DefaultLimitNOFILE=65536" >>  /etc/systemd/system.conf
echo "DefaultLimitNPROC=32000" >>  /etc/systemd/system.conf
echo "DefaultLimitMEMLOCK=infinity" >>  /etc/systemd/system.conf
cat /etc/systemd/system.conf | grep "^[A-Z]"

#配置es
cp /etc/elasticsearch/elasticsearch.yml{,.bak}
echo "修改elasticsearch.yml"
#基本配置
clusterName="es_cluster"
nodeName="es01"
#是否竞选master
master=true
#是否存储索引数据
data=true
#如果都不做，会变成client节点
#本机ip和端口
localIp=192.168.18.11
localPort=9200
#初始竞选master的节点
masters="[\"es01\", \"es02\"]"
#发现其他节点的列表
discovery="[\"192.168.18.11:9300\", \"192.168.18.12:9300\", \"192.168.18.13:9300\"]"

echo "cluster.name: $clusterName" >> /etc/elasticsearch/elasticsearch.yml
echo "node.name: $nodeName" >> /etc/elasticsearch/elasticsearch.yml
sed -i "s/^path.data: \/var\/lib\/elasticsearch/path.data: \/es_data\/data/" /etc/elasticsearch/elasticsearch.yml
sed -i "s/^path.logs: \/var\/log\/elasticsearch/path.logs: \/es_data\/log/" /etc/elasticsearch/elasticsearch.yml
echo "node.master: $master" >> /etc/elasticsearch/elasticsearch.yml
echo "node.data: $data" >> /etc/elasticsearch/elasticsearch.yml
echo "network.host: $localIp" >> /etc/elasticsearch/elasticsearch.yml
echo "http.port: $localPort" >> /etc/elasticsearch/elasticsearch.yml
echo "discovery.seed_hosts: $discovery" >> /etc/elasticsearch/elasticsearch.yml
echo "cluster.initial_master_nodes: $masters" >> /etc/elasticsearch/elasticsearch.yml
#锁住物理内存，避免使用swap交换分区
echo "bootstrap.memory_lock: true" >> /etc/elasticsearch/elasticsearch.yml
echo "es配置完毕"
cat /etc/elasticsearch/elasticsearch.yml | grep "^[a-z]"

chkconfig --add elasticsearch
chkconfig elasticsearch on

echo "重启系统"
reboot

注
1、用rpm安装es，会自动创建elasticsearch用户和用户组
2、最好重启一下，应用这些参数，重启后会自动开启es
3、在浏览器输入http:<ip>:9200即可查看是否安装成功