Elasticsearch的curl-rest命令

Rest：Representational State Transfer
document文档数据导入到es集群

put更新
主从(粗细)散列分布，绝不能放在1个节点上

file
segment（段，多个document组成）
document（一条记录，一个对象实例）
field（对象的属性）
term（项，分词之后的词条）

CURL命令

在命令行下访问url的一个工具（理解为浏览器）
可以简单实现常见的get/post请求
-X 指定http请求的方法：HEAD,GET,POST,PUT,DELETE
-d 指定要传输的数据
PUT和POST都可做创建和修改更新，就看id是否存在

# 建立索引库
curl -XPUT http://192.168.118.102:9200/appke/
# 删除索引库
curl -XDELETE http://192.168.118.102:9200/test2/


# 创建document，添加数据自动创建id
curl -XPOST http://192.168.118.102:9200/appke/employee -d '
{
   "first_name" : "bin",
   "age" : 33,
   "about" : "I love to go rock climbing",
   "interests": [ "sports", "music"]
}'
curl -XPOST http://192.168.118.102:9200/appke/employee -d '
{
   "first_name" : "bin guo",
   "age" : 47,
   "about" : "I love to fitness",
   "interests": [ "fishing", "music"]
}'
curl -XPOST http://192.168.118.102:9200/appke/employee/2 -d '
{
 "first_name" : "bin",
 "age" : 45,
 "about" : "I love to go rock climbing",
 "interests": [ "sports", "music" ]
}'


# 添加属性，动态类的增值
curl -XPOST http://192.168.118.102:9200/appke/employee -d '
{
 "first_name" : "pablo2",
 "age" : 33,
 "about" : "I love to go rock climbing",
 "interests": [ "sports", "music" ],
 "sex": "man"
}'
# 指定id
curl -XPOST http://192.168.118.102:9200/appke/employee/222 -d '
{
 "first_name" : "pablo2",
 "age" : 35,
 "about" : "I love to go rock climbing",
 "interests": [ "sports", "music" ],
 "sex": "man"
}'


# 更新，下面都有问题
# appke/employee/1 1是id，随便的，相当于增加
curl -XPUT http://192.168.118.102:9200/appke/employee/1 -d '
{
 "first_name" : "god bin",
 "last_name" : "pang",
 "age" : 42,
 "about" : "I love to go rock climbing",
 "interests": [ "sports", "music" ]
}'
# 错误❌ 找不到句柄，参数没给全
curl -XPUT http://192.168.118.102:9200/appke/employee -d '
{
 "first_name" : "god bin",
 "last_name" : "bin",
 "age" : 45,
 "about" : "I love to go rock climbing",
 "interests": [ "sports", "music" ]
}'
# 修改更新
curl -XPUT http://192.168.118.102:9200/appke/employee/1 -d '
{
 "first_name" : "god bin",
 "last_name" : "pang",
 "age" : 40,
 "about" : "I love to go rock climbing",
 "interests": [ "sports", "music" ]
}'

document获取数据

#根据document的id来获取数据：(?pretty有缩进)
curl -XGET http://192.168.118.102:9200/appke/employee/1?pretty

#根据field来查询数据：
curl -XGET http://192.168.118.102:9200/appke/employee/_search?q=first_name="bin"

# 根据field来查询数据：match，查询条件封装！
curl -XGET http://192.168.118.102:9200/appke/employee/_search?pretty -d '
{
 "query":
  {"match":
   {"first_name":"bin"}
  }
}'

#对多个field发起查询：multi_match，匹配多个字段
curl -XGET http://192.168.118.102:9200/appke/employee/_search?pretty -d '
{
 "query":
  {"multi_match":
   {
    "query":"bin",
    "fields":["last_name","first_name"],
    "operator":"and"
   }
  }
}'

多个term对多个field发起查询：bool（boolean）

#  组合查询，must, must_not, should 
#  must + must : 交集
#  must +must_not ：差集
#  should+should  : 并集

curl -XGET http://192.168.118.102:9200/appke/employee/_search?pretty -d '
{
 "query":
  {"bool" :
   {
    "must" : 
     {"match":
      {"first_name":"bin"}
     },
    "must" : 
     {"match":
      {"age":33}
     }
   }
  }
}'

curl -XGET http://192.168.118.102:9200/appke/employee/_search?pretty -d '
{
 "query":
  {"bool" :
   {
    "must" : 
     {"match":
      {"first_name":"bin"}
     },
    "must_not" : 
     {"match":
      {"age":33}
     }
   }
  }
}'


curl -XGET http://192.168.118.102:9200/appke/employee/_search?pretty -d '
{
 "query":
  {"bool" :
   {
    "must_not" : 
     {"match":
      {"first_name":"bin"}
     },
    "must_not" : 
     {"match":
      {"age":33}
     }
   }
  }
}'


##查询first_name=bin的，或者年龄在20岁到33岁之间的
curl -XGET http://192.168.118.102:9200/appke/employee/_search -d '
{
 "query":
  {"bool" :
   {
   "must" :
    {"term" : 
     { "first_name" : "bin" }
    }
   ,
   "must_not" : 
    {"range":
     {"age" : { "from" : 20, "to" : 33 }
    }
   }
   }
  }
}'

修改配置

# 2个从，主默认5个 5x(1+2)=15
curl -XPUT 'http://192.168.118.102:9200/test2/' -d'{"settings":{"number_of_replicas":2}}'
# 3个主，3个从 ，3x(1+3)=12，总共只有3个节点，最多只能有2个从，即3x(1+2)=9
curl -XPUT 'http://192.168.118.102:9200/test3/' -d'{"settings":{"number_of_shards":3,"number_of_replicas":3}}'

curl -XPUT 'http://192.168.118.102:9200/test4/' -d'{"settings":{"number_of_shards":6,"number_of_replicas":4}}'


curl -XPOST http://192.168.9.11:9200/appke/person/_mapping -d'
{
    "person": {
        "properties": {
            "content": {
                "type": "string",
                "store": "no",
                "term_vector": "with_positions_offsets",
                "analyzer": "ik_max_word",
                "search_analyzer": "ik_max_word",
                "include_in_all": "true",
                "boost": 8
            }
        }
    }
}'

ES和关系型数据库的数据对比，叫法变了

REST的操作分为以下几种

1. GET：获取对象的当前状态；
2. PUT：改变对象的状态；
3. POST：创建对象；
4. DELETE：删除对象；
5. HEAD：获取头信息

ES内置的REST接口