Elasticsearch 安装

1、下载 最新版的 Elasticsearch （elasticsearch-6.2.0.tar.gz） 到 /usr/local/src 目录下

2、解压缩到当前文件夹　　　　【tar -zxvf elasticsearch-6.2.0.tar.gz】

3、移动到 /usr/local 目录下　　 【mv elasticsearch-6.2.0 ../】

4、将命令添加到环境变量 　　  【vi /etc/profile】

5、最后添加

export JAVA_HOME=/usr/jdk1.8.0_60

export JRE_HOME=$JAVA_HOME/jre

export ELASTICSEARCH_HOME=/usr/local/elasticsearch-6.2.0

export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$ELASTICSEARCH_HOME/bin:$PATH

6、修改 /usr/local/elasticsearch-6.2.0/config/elasticsearch.yml

cluster.name: my-application

node.name: node-1

network.host: 0.0.0.0

http.port: 9200

node.max_local_storage_nodes: 2

可能遇到异常

1、failed to obtain node locks, tried [[/elasticsearch-5.4.0/data/elasticsearch]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])

 /usr/local/elasticsearch-6.2.0/config/elasticsearch.yml  配置文件最后添加  node.max_local_storage_nodes: 2

2、can not run elasticsearch as root

useradd elasticsearch

chown -R elasticsearch:elasticsearch /usr/local/elasticsearch-6.2.0

su elasticsearch

sh /usr/local/elasticsearch-6.2.0/bin/elasticsearch -d

3、main ERROR No log4j2 configuration file found. Using default configuration: logging only errors to the console

node.max_local_storage_nodes: 2

请尽量保持冒号前面没空格，后面一个空格，不要用tab键