ElasticSearch安装

官网及Github地址:
http://www.elastic.co/guide/en/elasticsearch/reference/current/setup-configuration.html
https://github.com/elastic/elasticsearch

【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}


We recommend installing the Java 8 update 20 or later, or Java 7 update 55 or later.
Previous versions of Java 7 are known to have bugs that can cause index corruption and data loss.
Elasticsearch will refuse to start if a known-bad version of Java is used.

【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/elasticsearch.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:PWDscprelasticsearch2.3.1/node6.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}'


es安装插件下载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”
}’

或者通过 _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的书

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

原文地址:https://www.cnblogs.com/wanxi/p/6476210.html