Elasticsearch-Index索引

一.索引管理
直接put数据PUT index/_doc/1，ES会自动生成索引，并建立动态映射dynamic mapping
在生产上，需要自己手动建立索引和映射，为了更好地管理索引。就像数据库的建表语句一样

1. 创建索引

PUT /index 
{
  "setting": {},
  "mappings": {
    "properties": {
      "field1": {"type": "text"}, ...
    }
  },
  "aliases": {
    "default_index": {}
  }
}

eg：

PUT my_index
{
  "settings": { # 索引的设置
    "number_of_shards": 1, # 分片数
    "number_of_replicas": 1 # 副本数
  },
  "mappings": { # 设置映射,
    "properties": {
      "field1": {
        "type": "text"
      },
      "field2": {
        "type": "text"
      }
    }
  },
  "aliases": { # 别名
    "default_index": {} # 可以通过my_index查询也可使用default_index查询
  }
}

eg:

PUT my_index
{
  "settings": {
    "number_of_shards": 1,
    "number_of_replicas": 1
  },
  "mappings": { 
    "properties": {
      "field1": {
        "type": "text"
      },
      "field2": {
        "type": "text"
      }
    }
  },
  "aliases": {
    "default_index": {}
  }
}

PUT my_index/_doc/1
{
  "field1": "php",
  "field2": "java"
}

GET my_index/_doc/1

GET default_index/_doc/1

2. 查询索引

GET my_index
GET my_index/_mapping
GET my_index/_settings

3. 修改索引

修改副本数
PUT my_index/_settings
{
  "index": {
    "number_of_replicas" : 2
  }
}

4. 删除索引
   DELETE /my_index
   DELETE /inidex_1, index_2
   DELETE /inidex_*
   DELETE /_all # 删除所有索引
   为了安全起见，防止恶意删除索引，删除时必须指定索引名，在elasticsearch.yml配置文件中更改
   action.destructive_requires_name: true