elasticsearch2.2系列一（es的安装）

环境为centos 7，已经安装了jdk7, jdk必须要安装7及以上版本

1. 切换到非root用户（目前的es不能使用root用户）

2. 下载es并解压:

    wget https://download.elasticsearch.org/elasticsearch/release/org/elasticsearch/distribution/tar/elasticsearch/2.2.1/elasticsearch-2.2.1.tar.gz
    tar -xvzf elasticsearch-2.2.1.tar.gz
    我这里是下载和解压到当前用户的home下面
   

3. 关闭防火墙

    sudo systemctl stop firewalld.service
   

我用的是centos7所以用以上命令关闭，假如你用的是centos6可用以下命令

	/etc/init.d/iptables stop			//关闭防火墙服务
	chkconfig –level 35 iptables off	//永久关闭防火墙

1. 运行

    ~/elasticsearch-2.2.1/bin/elasticsearch 
   

以上命令是前端运行，关掉终端会结束进程，要后台运行，并且把进程的pid打印到当前目录的pid文件里面，可以加参数运行如下

	~/elasticsearch-2.2.1/bin/elasticsearch -d -p pid

1. 检查是否已经启动

    [hadoop@master ~]$ curl localhost:9200
    {
      "name" : "Redeemer",
      "cluster_name" : "elasticsearch",
      "version" : {
        "number" : "2.2.1",
        "build_hash" : "d045fc29d1932bce18b2e65ab8b297fbf6cd41a1",
        "build_timestamp" : "2016-03-09T09:38:54Z",
        "build_snapshot" : false,
        "lucene_version" : "5.4.1"
      },
      "tagline" : "You Know, for Search"
    }
   

   注意：此时用外网或者局域网ip是不能访问的，如果要访问，按以下修改：

    vim ~/elasticsearch-2.2.1/config/elasticsearch.yml
    修改配置		network.host: 0.0.0.0
   

2. 安装head插件

   插件安装格式为：sudo bin/plugin install [org]/[user|component]/[version]

    [hadoop@master ~]$ ~/elasticsearch-2.2.1/bin/plugin install mobz/elasticsearch-head
    -> Installing mobz/elasticsearch-head...
    Trying https://github.com/mobz/elasticsearch-head/archive/master.zip ...
    Downloading ......................................................................................................................................................	..................................................................................................................................................................	..................................................................................................................................................................	..................................................................................................................................................................	........................DONE
    Verifying https://github.com/mobz/elasticsearch-head/archive/master.zip checksums if available ...
    NOTE: Unable to verify checksum for downloaded plugin (unable to find .sha1 or .md5 file to verify)
    Installed head into /home/hadoop/elasticsearch-2.2.1/plugins/head
   

3. 关闭

   • 在运行的时候如果加了-p参数，那es进程的pid会写入参数指定的文件里面，然后kill pid即可

   • 还可以通过jps命令找到es的pid

       [hadoop@master ~]$ jps
       30462 Jps
       23584 Elasticsearch