CentOS7(单节点)安装elasticsearch

1.下载安装包
2.上传到linux
3.解压：

cd /usr/local/tars

tar -zxvf elasticsearch-5.6.2.tar.gz -C /usr/local

4.新建目录

cd /usr/local/elasticsearch-5.6.2

mkdir data                    
mkdir logs     

5.修改配置文件：

cd /usr/local/elasticsearch-5.6.2/config

vi elasticsearch.yml

修改内容如下：

cluster.name: my-application

node.name: hadoop1

path.data: /usr/local/elasticsearch-5.6.2/data

path.logs: /usr/local/elasticsearch-5.6.2/logs

bootstrap.memory_lock: false
bootstrap.system_call_filter: false

network.host: hadoop1

discovery.zen.ping.unicast.hosts: ["hadoop1"]

6.修改limits.conf 文件

vi /etc/security/limits.conf

//在文件末尾添加如下内容

* soft nofile 655360
* hard nofile 131072
* soft nproc 4096
* hard nproc 4096

7.修改limit.d下的文件

vi /etc/security/limits.d/20-nproc.conf

//修改内容如下
*    soft    nproc    1024
//改为
*    soft    nproc    4096

8.修改sysctl.conf文件

vi /etc/sysctl.conf

//添加内容
vm.max_map_count=655360

9.新建用户，elasticsearch不能以root用户启动

useradd hduser

cd /user/local

chown -R hduser ./elasticsearch-5.6.2/
chgrp -R hduser ./elasticsearch-5.6.2/

10.切换到hduser用户，启动elasticsearch

su hduser

cd /usr/local/elasticsearch-5.6.2

./bin/elasticsearch -d                              //后台启动