elasticsearch安装教程

在多台机器上执行下面的命令

#es启动时需要使用非root用户,所有创建一个bigdata用户:

 

useradd bigdata

#为hadoop用户添加密码:

echo 123456 | passwd --stdin bigdata

  #将bigdata添加到sudoers

echo "bigdata ALL = (root) NOPASSWD:ALL" | tee /etc/sudoers.d/bigdata
chmod 0440 /etc/sudoers.d/bigdata

  #解决sudo: sorry, you must have a tty to run sudo问题,在/etc/sudoer注释掉 Default requiretty 一行

sudo sed -i 's/Defaults    requiretty/Defaults:bigdata !requiretty/' /etc/sudoers

  #创建一个bigdata目录

mkdir /{bigdata,data}

  #给相应的目录添加权限

chown -R bigdata:bigdata /{bigdata,data}

  

切换到bigdata用户安装

1.安装jdk(jdk要求1.8.20或1.7.55以上)

2.上传es安装包

3.解压es

tar -zxvf elasticsearch-2.3.1.tar.gz -C /bigdata/

  4.修改配置

vi /bigdata/elasticsearch-2.3.1/config/el#es绑定的ip地址asticsearch.yml

  #集群名称,通过组播的方式通信,通过名称判断属于哪个集群

cluster.name: bigdata

  #节点名称,要唯一

node.name: es-1

  #数据存放位置

path.data: /data/es/data

  #日志存放位置

path.logs: /data/es/logs

  #es绑定的ip地址

network.host: 172.16.0.14

  #初始化时可进行选举的节点

discovery.zen.ping.unicast.hosts: ["node-4.itcast.cn", "node-5.itcast.cn", "node-6.itcast.cn"]

  5.使用scp拷贝到其他节点

scp -r elasticsearch-2.3.1/ node-5.itcast.cn:$PWD
scp -r elasticsearch-2.3.1/ node-6.itcast.cn:$PWD

  

6.在其他节点上修改es配置,需要修改的有node.name和network.host

7.启动es(/bigdata/elasticsearch-2.3.1/bin/elasticsearch -h查看帮助文档)

/bigdata/elasticsearch-2.3.1/bin/elasticsearch -d

  8.用浏览器访问es所在机器的9200端口

http://172.16.0.14:9200/
{
  "name" : "es-1",
  "cluster_name" : "bigdata",
  "version" : {
    "number" : "2.3.1",
    "build_hash" : "bd980929010aef404e7cb0843e61d0665269fc39",
    "build_timestamp" : "2016-04-04T12:25:05Z",
    "build_snapshot" : false,
    "lucene_version" : "5.5.0"
  },
  "tagline" : "You Know, for Search"
}

kill `ps -ef | grep Elasticsearch | grep -v grep | awk '{print $2}'`

  

ElasticSearch-Head

ElasticSearch-Head 是一个与Elastic集群(Cluster)相交互的Web前台。

ElasticSearch-Head的主要作用:
• 它展现ES集群的拓扑结构,并且可以通过它来进行索引(Index)和节点(Node)级别的操作
• 它提供一组针对集群的查询API,并将结果以json和表格形式返回
• 它提供一些快捷菜单,用以展现集群的各种状态

安装es插件:

/bigdata/elasticsearch-2.3.1/bin/plugin install mobz/elasticsearch-head

[hadoop@master es]$ 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 /export/servers/es/plugins/head

  本地方式安装head插件

./plugin install file:///home/bigdata/elasticsearch-head-master.zip

  #访问head管理页面

http://172.16.0.14:9200/_plugin/head

  

RESTful接口URL的格式:

http://localhost:9200///[]

其中index、type是必须提供的。
id是可选的,不提供es会自动生成。
index、type将信息进行分层,利于管理。
index可以理解为数据库;type理解为数据表;id相当于数据库表中记录的主键,是唯一的。

向store索引中添加一些书籍

curl -XPUT 'http://172.16.0.14:9200/store/books/1' -d '{
  "title": "Elasticsearch: The Definitive Guide",
  "name" : {
    "first" : "Zachary",
    "last" : "Tong"
  },
  "publish_date":"2015-02-06",
  "price":"49.99"
}'

  通过浏览器查询

http://172.16.0.14:9200/store/books/1

  在linux中通过curl的方式查询

curl -XGET 'http://172.16.0.14:9200/store/books/1'

  在添加一个书的信息

curl -XPUT 'http://172.16.0.14:9200/store/books/2' -d '{
  "title": "Elasticsearch Blueprints",
  "name" : {
    "first" : "Vineeth",
    "last" : "Mohan"
  },
  "publish_date":"2015-06-06",
  "price":"35.99"
}'

  通过ID获得文档信息

curl -XGET 'http://172.16.0.14:9200/bookstore/books/1'

  在浏览器中查看

http://172.16.0.14:9200/bookstore/books/1

  

通过_source获取指定的字段

curl -XGET 'http://172.16.0.14:9200/store/books/1?_source=title'
curl -XGET 'http://172.16.0.14:9200/store/books/1?_source=title,price'
curl -XGET 'http://172.16.0.14:9200/store/books/1?_source'

  

#可以通过覆盖的方式更新

 

curl -XPUT 'http://172.16.0.14:9200/store/books/1' -d '{
  "title": "Elasticsearch: The Definitive Guide",
  "name" : {
    "first" : "Zachary",
    "last" : "Tong"
  },
  "publish_date":"2016-02-06",
  "price":"99.99"
}'

通过 _update  API的方式单独更新你想要更新的
curl -XPOST 'http://172.16.0.14:9200/store/books/1/_update' -d '{
  "doc": {
     "price" : 88.88
  }
}'

curl -XGET 'http://172.16.0.14:9200/store/books/1'

  删除一个文档

curl -XDELETE 'http://172.16.0.14:9200/store/books/1'

  最简单filter查询

SELECT * FROM books WHERE price = 35.99

  #filtered 查询价格是35.99的

curl -XGET 'http://172.16.0.14:9200/store/books/_search' -d '{
    "query" : {
        "filtered" : {
            "query" : {
                "match_all" : {}
            },
            "filter" : {
                "term" : {
                    "price" : 35.99
                  }
              }
        }
    }
}'

#指定多个值
curl -XGET 'http://172.16.0.14:9200/store/books/_search' -d '{
    "query" : {
        "filtered" : {
            "filter" : {
                "terms" : {
                    "price" : [35.99, 99.99]
                  }
              }
        }
    }
}'


# SELECT * FROM books WHERE publish_date = "2015-02-06"
curl -XGET 'http://172.16.0.14:9200/bookstore/books/_search' -d '{
  "query" : {
    "filtered" : {
        "filter" : {
           "term" : {
              "publish_date" : "2015-02-06"
            }
          }
      }
  }
}'

  bool过滤查询,可以做组合过滤查询

 SELECT * FROM books WHERE (price = 35.99 OR price = 99.99) AND (publish_date != "2016-02-06")

  类似的,Elasticsearch也有 and, or, not这样的组合条件的查询方式

# 格式如下:
#  {
#    "bool" : {
#    "must" :     [],
#    "should" :   [],
#    "must_not" : [],
#    }
#  }
#
# must: 条件必须满足,相当于 and
# should: 条件可以满足也可以不满足,相当于 or
# must_not: 条件不需要满足,相当于 not

curl -XGET 'http://172.16.0.14:9200/bookstore/books/_search' -d '{
  "query" : {
    "filtered" : {
      "filter" : {
        "bool" : {
          "should" : [
            { "term" : {"price" : 35.99}},
            { "term" : {"price" : 99.99}}
          ],
		  "must_not" : {
            "term" : {"publish_date" : "2016-02-06"}
          }
        }
      }
    }
  }
}'

  嵌套查询

SELECT * FROM books WHERE price = 35.99 OR ( publish_date = "2016-02-06" AND price = 99.99 )

curl -XGET 'http://172.16.0.14:9200/bookstore/books/_search' -d '{
  "query" : {
    "filtered" : {
      "filter" : {
        "bool" : {
          "should" : [
              { "term" : {"price" : 35.99}},
              { "bool" : {
              "must" : [
                {"term" : {"publish_date" : "2016-02-06"}},
                {"term" : {"price" : 99.99}}
              ]
            }}
          ]
        }
      }
    }
  }
}'

  range范围过滤

 

# SELECT * FROM books WHERE price >= 20 AND price < 100
# gt :  > 大于
# lt :  < 小于
# gte :  >= 大于等于
# lte :  <= 小于等于

curl -XGET 'http://172.16.0.14:9200/store/books/_search' -d '{
  "query" : {
    "filtered" : {
      "filter" : {
        "range" : {
          "price" : {
            "gt" : 20.0,
            "lt" : 100
          }
        }
      }
    }
  }
}'

  

另外一种 and, or, not查询
没有bool, 直接使用and , or , not

注意: 不带bool的这种查询不能利用缓存

查询价格既是35.99,publish_date又为"2015-02-06"的结果

 

curl -XGET 'http://172.16.0.14:9200/bookstore/books/_search' -d '{
  "query": {
    "filtered": {
      "filter": {
        "and": [
        {
          "term": {
            "price":59.99
          }
        },
        {
          "term": {
            "publish_date":"2015-02-06"
          }
        }
       ]
     },
     "query": {
      "match_all": {}
      }
    }
  }
}'

  

http://172.16.0.14:9200/bookstore/books/_search

es安装插件下载es插件

 

/bigdata/elasticsearch-2.3.1/bin/plugin install elasticsearch/marvel/latest

  访问head管理页面

http://172.16.0.14:9200/_plugin/marvel

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posted @ 2021-08-11 10:45  大数据同盟会  阅读(353)  评论(0)    收藏  举报