1. 安装

https://www.elastic.co/cn/

• 下载
  https://www.elastic.co/cn/downloads/past-releases/elasticsearch-8-5-3
  https://www.elastic.co/cn/downloads/past-releases/kibana-8-5-3

• 解压，点击 D:\elasticsearch-8.5.3\bin\elasticsearch.bat 启动后会报错

• 修改配置 "D:\elasticsearch-8.5.3\config\elasticsearch.yml" 配置文件会多出来一些配置

学习环境下，全部改为false即可

# Enable security features
xpack.security.enabled: Falsexpack.security.enrollment.enabled: False# Enable encryption for HTTP API client connections, such as Kibana, Logstash, and Agents
xpack.security.http.ssl:enabled: Falsekeystore.path: certs/http.p12# Enable encryption and mutual authentication between cluster nodes
xpack.security.transport.ssl:enabled: Falseverification_mode: certificatekeystore.path: certs/transport.p12truststore.path: certs/transport.p12

• 再重新启动 ES
  在浏览器输入 http://localhost:9200/
  看见 json，就算安装好了
  

• 点击 "D:\kibana-8.5.3\bin\kibana.bat"
  http://localhost:5601/app/dev_tools#/console

• 测试

写入 doc

put product/_doc/1 
{"name": "apple","price": 5.6
}

返回

{"_index": "product","_id": "1","_version": 3,"result": "updated","_shards": {"total": 2,"successful": 1,"failed": 0},"_seq_no": 2,"_primary_term": 1
}

查询 doc

get /product/_doc/1

返回

{"_index": "product","_id": "1","_version": 3,"_seq_no": 2,"_primary_term": 1,"found": true,"_source": {"name": "apple","price": 5.6}
}

2. search

查看所有 index

get _cat/indices

从 index 中 from 第几个数据开始，size 个docs

GET kibana_sample_data_logs/_search?from=1&size=2

3. index

创建 index

PUT test_index
{"settings":{"number_of_shards": 1,"number_of_replicas": 1}
}

删除 index

DELETE test_index

创建完 index 后，主分片数量、index名、字段类型 不可以再修改

重新创建文档，只会带过来 doc，属性设置不会带过来

POST _reindex
{"source": {"index": "test_index"},"dest": {"index": "new_test_index"}
}

检查 index 是否存在

head new_test_index

4. doc CRUD

创建发生在 主分片(可读可写)

op_type

操作类型：

• index：更新
• create：只创建，不更新，如果存在相同doc报错

PUT test_index/_doc/1?op_type=create
{"name": "test1"
}

id 1 的 doc 已存在，create 报错

{"error": {"root_cause": [{"type": "version_conflict_engine_exception","reason": "[1]: version conflict, document already exists (current version [1])","index_uuid": "ntM1X5SOTxiz8tRVwdHK6g","shard": "0","index": "test_index"}],"type": "version_conflict_engine_exception","reason": "[1]: version conflict, document already exists (current version [1])","index_uuid": "ntM1X5SOTxiz8tRVwdHK6g","shard": "0","index": "test_index"},"status": 409
}

index 操作，替换 doc

PUT test_index/_doc/1?op_type=index
{"name": "test_new"
}

{"_index": "test_index","_id": "1","_version": 2,"result": "updated","_shards": {"total": 2,"successful": 1,"failed": 0},"_seq_no": 1,"_primary_term": 1
}

POST 可以自动生成 随机 id

POST test_index/_doc/
{"name": "test_new"
}

{"_index": "test_index","_id": "YrdpU4UBIo5EnYllVY0M","_version": 1,"result": "created","_shards": {"total": 2,"successful": 1,"failed": 0},"_seq_no": 4,"_primary_term": 1
}

获取 doc 元字段

• 获取 doc 元字段 _source=false（不返回 source），不写的话，默认为 true

GET test_index/_doc/1?_source=false

{"_index": "test_index","_id": "1","_version": 4,"_seq_no": 3,"_primary_term": 1,"found": true
}

只获取 doc 源数据

GET test_index/_source/1

{"name": "test_new"
}

删除 doc

DELETE test_index/_doc/5

{"_index": "test_index","_id": "5","_version": 1,"result": "not_found",  # id 5 的不存在"_shards": {"total": 2,"successful": 1,"failed": 0},"_seq_no": 6,"_primary_term": 1
}

{"_index": "test_index","_id": "1","_version": 1,"result": "deleted",  # id 1 的存在，删除掉了"_shards": {"total": 2,"successful": 1,"failed": 0},"_seq_no": 7,"_primary_term": 1
}

update doc

• 更新 doc，更上面的 替换 是不一样的，更新可以只更新部分字段，其他字段保留

先添加一个 doc

POST test_index/_doc/1
{"name": "test_new","value": 99
}

再查询

GET test_index/_doc/1

更新部分字段

POST test_index/_update/1
{"doc": {"value": 100}
}

再查询

{"_index": "test_index","_id": "1","_version": 2,"_seq_no": 10,"_primary_term": 1,"found": true,"_source": {"name": "test_new","value": 100}
}