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Elasticsearch Startguide

如果有Lucene的使用经历，elasticsearch的入门还是比较简单的。直接解压启动命令就安装好了，然后就是添加一些plugins就OK了。

安装

从官网下载 TAR包 ，解压后，运行 elasticsearch 脚本启动服务。

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# -d 表示 daemonize 后台运行
[hadoop@cu2 elasticsearch-2.2.0]$ bin/elasticsearch -d

插件

大部分插件都是ajax方式的静态页面，可以通过plugin脚本安装，或者直接解压文件到plugins目录下面。

安装已经下载到本地的插件需要加file协议，不然程序会从官网下载。或者直接解压到plugins目录下：

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[hadoop@cu2 elasticsearch-2.2.0]$ bin/plugin install file:///home/hadoop/elasticsearch-head-master.zip 
-> Installing from file:/home/hadoop/elasticsearch-head-master.zip...
Trying file:/home/hadoop/elasticsearch-head-master.zip ...
Downloading .........DONE
Verifying file:/home/hadoop/elasticsearch-head-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-2.2.0/plugins/head

windows

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E:\local\usr\share\elasticsearch-2.3.3\bin>plugin.bat install file:///D:/SOFTWARE/elasticsearch/elasticsearch-plugin/elasticsearch-head-master.zip

安装好plugin后，打开浏览器查看索引情况： http://localhost:9200/_plugin/head/

插件高阶

有些插件版本比较旧需要改一改，需要了解新版本的 elasticsearch-plugin 的规范：

https://www.elastic.co/guide/en/elasticsearch/plugins/2.3/installation.html

新版本插件主要是需要增加一个描述文件：

Plugins require descriptor file

遇到想安装的旧版本的plugin，描述文件写法可以参考 elasticsearch-head 。

可选插件：

常用URL请求

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# https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-create-index.html
# 创建
$ curl -XPUT 'http://localhost:9200/t_ods_idc_isp_log2/' -d '{
    "settings" : {
        "index" : {
            "number_of_shards" : 3,
            "number_of_replicas" : 0
        }
    }
}'
{"acknowledged":true}

# https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-put-mapping.html
# 更新
# mapping.json
{
  "properties": {
      "author": {
          "type": "string"
      },
...
      "year": {
          "type": "long",
          "ignore_malformed": false,
          "index": "analyzed"
      },
      "avaiable": {
          "type": "boolean"
      }
  }
}
$ curl -XPUT 'localhost:9200/t_ods_idc_isp_log2/_mapping/default' -d @mapping.json

$ curl -XPUT 'localhost:9200/t_ods_idc_isp_log2/_mapping/default' -d '
{
  "properties": {
    "fDIID": {
      "type": "string"
    },
...
    "gatherTime": {
      "type": "long"
    }
  }
}
'

# https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-templates.html
# 索引
# documents.json
{ "index": {      "_index": "library",        "_type": "book",        "_id": "1"  } }
{     "title": "All Quiet on the Western Front",  "otitle": "Im Westen nichts Neues",     "author": "Erich Maria Remarque",   "year": 1929,   "characters": ["Paul Baumer",   "Albert Kropp",     "Haie Westhus",     "Fredrich Muller",  "Stanislaus Katczinsky",    "Tjaden"],  "tags": ["novel"],  "copies": 1,    "available": true,  "section": 3 }
{     "index": {      "_index": "library",        "_type": "book",        "_id": "2"  } }
{     "title": "Catch-22",    "author": "Joseph Heller",  "year": 1961,   "characters": ["John Yossarian",    "Captain Aardvark",     "Chaplain Tappman",     "Colonel Cathcart",     "Doctor Daneeka"],  "tags": ["novel"],  "copies": 6,    "available": false,     "section": 1 }

$ curl -s -XPOST localhost:9200/_bulk --data-binary @documents.json

# 删除
$ curl -XDELETE 'http://localhost:9200/t_ods_idc_isp_log2/'
{"acknowledged":true}

# https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-get-mapping.html
# https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-get-field-mapping.html
# 状态查看
http://localhost:9200/_cat/health?v
http://localhost:9200/_cat/nodes?v
http://localhost:9200/_cat/indices?v

curl -XGET 'http://localhost:9200/_all/_mapping/book/field/author'
curl -XHEAD -i 'http://localhost:9200/twitter/tweet'
curl localhost:9200/_stats
curl -XGET 'http://localhost:9200/_all/_mapping/[type]'

–END

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