Elasticsearch第二篇！

发表于

安装

  1. 官网：https://www.elastic.co/cn/downloads/elasticsearch
  2. 下载：wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.6.0-darwin-x86_64.tar.gz
  3. 解压：tar -zxvf elasticsearch-7.5.0-darwin-x86_64.tar.gz
  4. 总写入量：. cd elasticsearch-7.5.0
  5. sh ./bin/elasticsearch
  6. 访问 127.0.0.1:9200

依赖java环境

head插件

  1. 下载： wget https://github.com/mobz/elasticsearch-head/archive/master.zip
  2. 解压 unzip master.zip
  3. cd www/es/elasticsearch-head-master
  4. npm install
  5. npm run start
  6. 访问 127.0.0.1:9100

elasticsearch 配置修改
vim config/elasticsearch.yml

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# 跨域配置
http.cors.enabled: true
http.cors.allow-origin: "*"

# 集群配置
cluster.name: uiste
node.name: master
node.master: true

network.host: 127.0.0.1

# 一下内容是从节点配置信息
#cluster.name: uiste
#node.name: slave1
#network.host: 127.0.0.1
#http.port: 8200
#discovery.zen.ping.unicast.hosts: ["127.0.0.1"]

依赖node环境

索引创建

API基本格式：

1
http://[ip]:[port]/[索引]/[类型]/[文档ID]

请求示例：

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URL:127.0.0.1:9100/people
METHOD: PUT
PARAMS:
{
    "settings": {
        "number_of_shards": 3,
        "number_of_replicas": 1
    },
    "mappings": {
        "properties": {
            "name": {
                "type": "text"
            },
            "country": {
                "type": "keyword"
            },
            "age": {
                "type": "integer"
            },
            "date": {
                "type": "date",
                "format": "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis"
            }
        }
    }
}
RESPONSE：
{
    "acknowledged": true,
    "shards_acknowledged": true,
    "index": "people"
}

异常情况执行结果出错：Root mapping definition has unsupported parameters
出现这个的原因是，elasticsearch7默认不在支持指定索引类型，默认索引类型是_doc，如果想改变，则配置include_type_name: true 即可(这个没有测试，官方文档说的，无论是否可行，建议不要这么做，因为elasticsearch8后就不在提供该字段)。官方文档：https://www.elastic.co/guide/en/elasticsearch/reference/current/removal-of-types.html

索引查询

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URL: 127.0.0.1:9200/people/_mapping
METHOD: GET
PARAMS:
RESPONSE：
{
    "people": {
        "mappings": {
            "properties": {
                "age": {
                    "type": "integer"
                },
                "country": {
                    "type": "keyword"
                },
                "date": {
                    "type": "date",
                    "format": "yyyy-MM-dd HH:mm:ss||yyyy-MM-dd||epoch_millis"
                },
                "name": {
                    "type": "text"
                }
            }
        }
    }
}

添加更新文档

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URL: 127.0.0.1:9200/people/_doc/1
METHOD:POST
PARAMS:
{
    "name": "uiste",
    "country": "China",
    "age": 18,
    "data": "1999-01-01"
}
RESPONSE：
{
    "_index": "people",
    "_type": "_doc",
    "_id": "1",
    "_version": 1,
    "result": "created",
    "_shards": {
        "total": 2,
        "successful": 2,
        "failed": 0
    },
    "_seq_no": 0,
    "_primary_term": 2
}

查询文档

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URL:127.0.0.1:9200/people/_search
METHOD:POST
PARAMS:
{
   "query":{
      "match_all":{}
   }
}
RESPONSE：
{
    "took": 453,
    "timed_out": false,
    "_shards": {
        "total": 1,
        "successful": 1,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": {
            "value": 1,
            "relation": "eq"
        },
        "max_score": 1,
        "hits": [
            {
                "_index": "people",
                "_type": "_doc",
                "_id": "1",
                "_score": 1,
                "_source": {
                    "name": "uiste",
                    "country": "China",
                    "age": 18,
                    "data": "1999-01-01"
                }
            }
        ]
    }
}

参考文档
https://www.cnblogs.com/Rasang/p/12041729.html