CentOS7上elasticsearch的安装和启动

一、安装java环境

-bash-4.2$ yum -y install java

-bash-4.2$  java -version

openjdk version "1.8.0_121"

OpenJDK Runtime Environment (build 1.8.0_121-b13)

OpenJDK 64-Bit Server VM (build 25.121-b13, mixed mode)

备注：

如果是源码安装，需要声明

cat >> /etc/bashrc << END

export JAVA_HOME="/usr/java/jdk1.8.0_25"

export CLASSPATH=${JAVA_HOME}/lib

export PATH=${JAVA_HOME}/bin:$PATH

END

source /etc/bashrc

二、源码编译并配置elasticsearch

-bash-4.2$ tar -zxf elasticsearch-5.0.1.tar.gz -C /usr/local/

-bash-4.2$ mv elasticsearch-5.0.1 elasticsearch

-bash-4.2$ useradd elasticsearch

-bash-4.2$ echo "123456" | passwd --stdin elasticsearch

-bash-4.2$ chown elasticsearch.elasticsearch /usr/local/elasticsearch -R

-bash-4.2$ grep ^[a-Z] /usr/local/elasticsearch/config/elasticsearch.yml

cluster.name: elk-cluster

node.name: linux-node1

path.data: /data/es-data

path.logs: /var/log/elasticsearch

bootstrap.memory_lock: true

network.host: 192.168.88.133

http.port: 9200

discovery.zen.ping.unicast.hosts: ["linux-node1", "linux-node2"]

http.cors.enabled: true           #跨域用的

http.cors.allow-origin: "*"        #跨域用的

备注：安装注意点

  ①当ES配置文件中的 network.host 不是 localhost 或者 127.0.0.1 的时候，就会认为是生产环境，对环境要求比较高，所以要修改 config/jvm.options 文件，-Xms256m -Xmx256m (这个大小根据自己实际情况设定)  

  ②在centos6的系统中需禁用 bootstrap，这时要在ES配置文件中添加： bootstrap.system_call_filter: false 

三、创建所需要数据和日志文件路径

-bash-4.2$ mkdir -p /data/es-data

-bash-4.2$ mkdir -p /var/log/elasticsearch

-bash-4.2$ chown elasticsearch.elasticsearch /data/es-data -R

-bash-4.2$ chown elasticsearch.elasticsearch /var/log/elasticsearch -R

四、启动

-bash-4.2$  su - elasticsearch

-bash-4.2$  /usr/local/elasticsearch/bin/elasticsearch -d

-bash-4.2$ ps -ef | grep elasticsearch

等过一会进程就消失了

如果出现这个问题，请参考我的博文：

CentOS7上elasticsearch5.0启动失败 ： http://blog.csdn.net/m0_37886429/article/details/68486682

五、重新启动，测试

备注：

1、elasticsearch不能用root用户启动，我这边采用的elasticsearch用户

-bash-4.2$ 

2、大环境：文件描述符和内存锁定问题

2.1 增大文件描述符

cat >>  /etc/security/limits.conf << END

elasticsearch  soft  memlock  unlimited

elasticsearch  hard  memlock  unlimited

*        hard    nofile           65536

*        soft    nofile           65536

END

备注：必须为65536

2.2 内存锁定问题

cat >> /etc/sysctl.conf << END

fs.file-max=65536

vm.max_map_count=262144

END

sysctl -p

3、如果是rpm包安装的jdk，需要声明jdk的家目录

export JAVA_HOME=/usr/java/jdk1.8.0_131

export CLASSPATH=${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar