ES介绍和使用

http://127.0.0.1:9200/

curl -X GET 127.0.0.1:9200/_cat/health?v

epoch      timestamp cluster       status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1564726309 06:11:49  elasticsearch yellow          1         1      3   3    0    0        1             0                  -                 75.0%

curl -X GET 127.0.0.1:9200/_cat/indices?v

health status index                uuid                   pri rep docs.count docs.deleted store.size pri.store.size
green  open   .kibana_task_manager LUo-IxjDQdWeAbR-SYuYvQ   1   0          2            0     45.5kb         45.5kb
green  open   .kibana_1            PLvyZV1bRDWex05xkOrNNg   1   0          4            1     23.9kb         23.9kb
yellow open   user                 o42mIpDeSgSWZ6eARWUfKw   1   1          0            0       283b           283b

curl -X PUT 127.0.0.1:9200/www

{"acknowledged":true,"shards_acknowledged":true,"index":"www"}

curl -X DELETE 127.0.0.1:9200/www

{"acknowledged":true}

curl -H "ContentType:application/json" -X POST 127.0.0.1:9200/user/person -d '
{
	"name": "dsb",
	"age": 9000,
	"married": true
}'

{
    "_index": "user",
    "_type": "person",
    "_id": "MLcwUWwBvEa8j5UrLZj4",
    "_version": 1,
    "result": "created",
    "_shards": {
        "total": 2,
        "successful": 1,
        "failed": 0
    },
    "_seq_no": 3,
    "_primary_term": 1
}

curl -H "ContentType:application/json" -X PUT 127.0.0.1:9200/user/person/4 -d '
{
	"name": "sb",
	"age": 9,
	"married": false
}'

curl -X GET 127.0.0.1:9200/user/person/_search

curl -H "ContentType:application/json" -X PUT 127.0.0.1:9200/user/person/4 -d '
{
	"query":{
		"match": {"name": "sb"}
	}	
}'

curl -H "ContentType:application/json" -X PUT 127.0.0.1:9200/user/person/4 -d '
{
	"query":{
		"match": {"name": "sb"}, 
		"size": 2
	}	
}'

# 初始化mod
go mod init es
# 下载依赖
go get github.com/olivere/elastic/v7

require (
    github.com/olivere/elastic/v7 v7.0.4
)

package main

import (
	"context"
	"fmt"

	"github.com/olivere/elastic/v7"
)

// Elasticsearch demo

type Person struct {
	Name    string `json:"name"`
	Age     int    `json:"age"`
	Married bool   `json:"married"`
}

func main() {
	client, err := elastic.NewClient(elastic.SetURL("http://192.168.1.7:9200"))
	if err != nil {
		// Handle error
		panic(err)
	}

	fmt.Println("connect to es success")
	p1 := Person{Name: "rion", Age: 22, Married: false}
	put1, err := client.Index().
		Index("user").
		BodyJson(p1).
		Do(context.Background())
	if err != nil {
		// Handle error
		panic(err)
	}
	fmt.Printf("Indexed user %s to index %s, type %s\n", put1.Id, put1.Index, put1.Type)
}