1，elasticsearch的安装
1，es启动时需要使用非root用户，所有创建一个bigdata用户（如果是root用户安装的话，启动时会有提示 elastic could not run a root的报错）：
#创建用户
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/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: 192.168.183.111
#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://192.168.183.111:9200/
{
"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 $2}‘`
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2，es安装插件下载es插件
/bigdata/elasticsearch-2.3.1/bin/plugin install mobz/elasticsearch-head
[[email protected] es]$ 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，插件地址：
http://localhost:9200/_plugin/head/
3，RESTful接口URL的格式：
http://localhost:9200/<index>/<type>/[<id>]
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://192.168.183.111:9200/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://192.168.183.111:9200/store/books/1
#在linux中通过curl的方式查询
curl -XGET ‘http://192.168.183.111:9200/store/books/1‘
#在添加一个书的信息
curl -XPUT ‘http://192.168.183.111:9200/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://192.168.183.111:9200/bookstore/books/1‘
#在浏览器中查看
http://192.168.183.111:9200/bookstore/books/1
# 通过_source获取指定的字段
curl -XGET ‘http://192.168.183.111:9200/store/books/1?_source=title‘
curl -XGET ‘http://192.168.183.111:9200/store/books/1?_source=title,price‘
curl -XGET ‘http://192.168.183.111:9200/store/books/1?_source‘
#可以通过覆盖的方式更新
curl -XPUT ‘http://192.168.183.111:9200/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://192.168.183.111:9200/store/books/1/_update‘ -d ‘{
"doc": {
"price" : 88.88
}
}‘
curl -XPOST ‘http://192.168.183.111:9200/store/books/2/_update‘ -d ‘{
"doc": {
"price" : 35.99
}
}‘
curl -XGET ‘http://192.168.183.111:9200/store/books/1‘
#删除一个文档
curl -XDELETE ‘http://192.168.183.111:9200/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://192.168.183.111:9200/store/books/_search‘ -d ‘{
"query" : {
"filtered" : {
"query" : {
"match_all" : {}
},
"filter" : {
"term" : {
"price" : 35.99
}
}
}
}
}‘
#指定多个值
curl -XGET ‘http://192.168.183.111:9200/store/books/_search‘ -d ‘{
"query" : {
"filtered" : {
"filter" : {
"term" : {
"price" : [35.99, 88.00]
}
}
}
}
}‘
# SELECT * FROM books WHERE publish_date = "2015-02-06"
curl -XGET ‘http://192.168.183.111:9200/store/books/_search‘ -d ‘{
"query" : {
"filtered" : {
"filter" : {
"term" : {
"publish_date" : "2016-02-06"
}
}
}
}
}‘
# 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://192.168.183.111:9200/store/books/_search‘ -d ‘{
"query" : {
"filtered" : {
"filter" : {
"bool" : {
"should" : [
{ "term" : {"price" : 35.99}},
{ "term" : {"price" : 99.99}}
],
"must_not" : {
"term" : {"publish_date" : "2015-06-06"}
}
}
}
}
}
}‘
# 嵌套查询
# SELECT * FROM books WHERE price = 35.99 OR ( publish_date = "2016-02-06" AND price = 99.99 )
curl -XGET ‘http://192.168.183.113:9200/store/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://192.168.183.111:9200/store/books/_search‘ -d ‘{
"query" : {
"filtered" : {
"filter" : {
"range" : {
"price" : {
"gt" : 20.0,
"lt" : 100.00
}
}
}
}
}
}‘
curl -XGET ‘http://192.168.183.111:9200/store/books/_search‘ -d ‘{
"query" : {
"filtered" : {
"filter" : {
"range" : {
"price" : {
"gte" : 20
}
}
}
}
}
}‘
# 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://192.168.183.111:9200/bookstore/books/_search‘ -d ‘{
"query": {
"filtered": {
"filter": {
"and": [
{
"term": {
"price":59.99
}
},
{
"term": {
"publish_date":"2015-02-06"
}
}
]
},
"query": {
"match_all": {}
}
}
}
}‘
http://192.168.183.111:9200/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://192.168.183.111:9200/_plugin/marvel