elasticsearch2.2系列一（es的安裝）

環境為centos 7，已經安裝了jdk7, jdk必須要安裝7及以上版本

1. 切換到非root用戶（目前的es不能使用root用戶）

2. 下載es並解壓:

   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
   我這裡是下載和解壓到當前用戶的home下麵

3. 關閉防火牆

   sudo systemctl stop firewalld.service

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

   /etc/init.d/iptables stop           //關閉防火牆服務
   chkconfig –level 35 iptables off    //永久關閉防火牆

4. 運行

   ~/elasticsearch-2.2.1/bin/elasticsearch 

   以上命令是前端運行，關掉終端會結束進程，要後臺運行，並且把進程的pid列印到當前目錄的pid文件裡面，可以加參數運行如下

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

5. 檢查是否已經啟動

   [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"
   }

   註意：此時用外網或者區域網ip是不能訪問的，如果要訪問，按以下修改：

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

6. 安裝head插件

   插件安裝格式為：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

7. 關閉

   • 在運行的時候如果加了-p參數，那es進程的pid會寫入參數指定的文件裡面，然後kill pid即可

   • 還可以通過jps命令找到es的pid

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