Centos6安装elasticsearch

1.安装java1.8环境（略）

2.在/usr/local/src下解压elasticsearch到/usr/local目录，并添加软链接

tar -zxvf elasticsearch-5.1.2.tar.gz -C /usr/local/

ln -s /usr/local/elasticsearch-2.2.1  /usr/local/elasticsearch

3.root用户无法启动，需要创建一个单独的用户用来运行ElasticSearch

groupadd elsearch

useradd elsearch -g elsearch -p elasticsearch

4.更改elasticsearch文件夹及内部文件的所属用户及组为elsearch:elsearch

cd /usr/local/

chown -R elsearch:elsearch  elasticsearch-5.1.2

5.切换到elsearch用户启动

su elsearch

cd /usr/local/elasticsearch

./bin/elasticsearch

6.处理启动中的报错

max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

vi /etc/sysctl.conf

添加下面配置：

vm.max_map_count=655360

max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]

vi /etc/security/limits.conf

添加如下内容:

* soft nofile 65536

* hard nofile 131072

* soft nproc 2048

* hard nproc 4096

max number of threads [1024] for user [elsearch] is too low, increase to at least [2048]

vi /etc/security/limits.d/90-nproc.conf

* soft nproc 1024

#修改为

* soft nproc 2048

7.ElasticSearch后端启动命令

./bin/elasticsearch -d

8.编辑配置文件vi config/elasticsearch.yml,修改以下配置

network.host:0.0.0.0

http.port: 9200

9.访问网站地址