常规操作elasticSearch:
对于elasticSearch的操作 通常用rest API完成
查看所有节点：
GET：
192.168.31.125:9200/_cat/nodes
示例返回：
127.0.0.1 16 97 10 0.23 0.56 0.62 dilm * 6a850788e223
查看健康状态：
GET：
192.168.31.125:9200/_cat/health
示例返回：
1635298278 01:31:18 elasticsearch green 1 1 4 4 0 0 0 0 - 100.0%
查看主节点：
GET：
192.168.31.125:9200/_cat/master
示例返回：
LxbmZJweRySmiwKYs4eAHg 127.0.0.1 127.0.0.1 6a850788e223
查看所有索引（类比mysql查看所数据库）：
GET：
192.168.31.125:9200/_cat/indices
示例返回：
green open .kibana_task_manager_1 CS2sQjxhTmqK_iwwyI0X4Q 1 0 2 0 31.2kb 31.2kb
green open kibana_sample_data_ecommerce mPzvtBuMQ3KmIWZs9mGlyQ 1 0 4675 0 4.7mb 4.7mb
green open .apm-agent-configuration HNEJe3GNSBipQlb-3_Ltow 1 0 0 0 283b 283b
green open .kibana_1 hIKbqbavQhKjvhM9znRc9A 1 0 54 1 943.2kb 943.2kb
yellow open customer -EYnoz-SQSyFAuXWL_4J5w 1 1 1 0 3.3kb 3.3kb
保存一条数据 put 保存：
注意：
put保存必须有id（唯一识别）
PUT：
192.168.31.125:9200/索引/类型/唯一识别
192.168.31.125:9200/customer/external/1
json参数：
{"name":"zxl"}
示例返回：
成功示例：
{
"_index": "customer",
"_type": "external",
"_id": "1",
"_version": 5,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 9,
"_primary_term": 1
}
不带唯一识别失败：
{
"error": "Incorrect HTTP method for uri [/customer/external/] and method [PUT], allowed: [POST]",
"status": 405
}
保存一条数据 POST保存：
注意：
不带id（唯一识别） 新增（唯一识别自动生成）
带id（唯一识别） id已存在 更新
带id（唯一识别） id已存在 新增
POST:
192.168.31.125:9200/索引/类型/唯一识别
192.168.31.125:9200/customer/external/2
json参数：
{"name":"sss"}
示例返回：
成功示例：
{
"_index": "customer",
"_type": "external",
"_id": "2",
"_version": 4,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 12,
"_primary_term": 1
}
不带唯一识别成功实例：
{
"_index": "customer",
"_type": "external",
"_id": "y7atv3wBC3_10cmr4V9N",
"_version": 1,
"result": "created",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 13,
"_primary_term": 1
}
查看数据：
GET：
192.168.31.125:9200/索引/类型/唯一识别
192.168.31.125:9200/customer/external/1
示例返回：
成功示例：
{
"_index": "customer",
"_type": "external",
"_id": "1",
"_version": 7,
"_seq_no": 11,
"_primary_term": 1,
"found": true,
"_source": {
"name": "ooo"
}
}
_seq_no 和 _primary_term 常用语存储数据并发时乐观锁操作 防止同时请求被多次修改
***乐观锁保存示例：
PUT:
192.168.31.125:9200/customer/external/1?if_seq_no=11&if_primary_term=1
json参数：
{"name":"yyds"}
示例返回：
第一次操作条件符合成功：
{
"_index": "customer",
"_type": "external",
"_id": "1",
"_version": 8,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 14,
"_primary_term": 1
}
继续点击提交 _seq_no发生变化 保存失败：
{
"error": {
"root_cause": [
{
"type": "version_conflict_engine_exception",
"reason": "[1]: version conflict, required seqNo [11], primary term [1]. current document has seqNo [14] and primary term [1]",
"index_uuid": "-EYnoz-SQSyFAuXWL_4J5w",
"shard": "0",
"index": "customer"
}
],
"type": "version_conflict_engine_exception",
"reason": "[1]: version conflict, required seqNo [11], primary term [1]. current document has seqNo [14] and primary term [1]",
"index_uuid": "-EYnoz-SQSyFAuXWL_4J5w",
"shard": "0",
"index": "customer"
},
"status": 409
}
***POST的_update更新数据更新文档示例：
POST:
192.168.31.125:9200/customer/external/1/_update
json参数：
{"name":"yyds"}
POST更新文档指定 索引/类型/唯一识别/_update
json参数应该为：{“doc”:{“name”:“333”}}
数据参数项必须在json对象的doc内。
数据会对比原数据，如果数据相同， 数据不会有操作，并且返回result：noop。此时操作：版本号_version 操作序列号_seq_no 不变。
示例返回：
第一次操作条件符合成功：
继续点击提交 保存：
{
"_index": "customer",
"_type": "external",
"_id": "1",
"_version": 11,
"result": "updated",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 17,
"_primary_term": 1
}
继续提交：
{
"_index": "customer",
"_type": "external",
"_id": "1",
"_version": 11,
"result": "noop",
"_shards": {
"total": 0,
"successful": 0,
"failed": 0
},
"_seq_no": 17,
"_primary_term": 1
}
只有POST带有_update参数，更新数据 数据才会对比原数据。
put和post不带有_udpate参数，都是更新数据。
如果增加唯一识别下数据的其他属性，直接带上添加保存即可。增加新属性 ，数据肯定变化，post带有udpate也是更新哦！
删除文档
DELETE请求：
192.168.31.125:9200/customer/external/1/
示例返回：
成功实例：
{
"_index": "customer",
"_type": "external",
"_id": "1",
"_version": 14,
"result": "deleted",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 20,
"_primary_term": 1
}
继续提交 删除不存在的主键文档：
{
"_index": "customer",
"_type": "external",
"_id": "1",
"_version": 15,
"result": "not_found",
"_shards": {
"total": 2,
"successful": 1,
"failed": 0
},
"_seq_no": 21,
"_primary_term": 1
}
删除文档后查找数据
get:
192.168.31.125:9200/customer/external/1/
实例：
{
"_index": "customer",
"_type": "external",
"_id": "1",
"found": false
}
删除是可以针对索引 文档。没有直接删除类型的操作
删除索引
DELETE请求：
192.168.31.125:9200/customer/
示例返回：
成功实例：
{
"acknowledged": true
}
删除索引后查找数据
get:
192.168.31.125:9200/customer/external/1/
实例：
{
"error": {
"root_cause": [
{
"type": "index_not_found_exception",
"reason": "no such index [customer]",
"resource.type": "index_expression",
"resource.id": "customer",
"index_uuid": "_na_",
"index": "customer"
}
],
"type": "index_not_found_exception",
"reason": "no such index [customer]",
"resource.type": "index_expression",
"resource.id": "customer",
"index_uuid": "_na_",
"index": "customer"
},
"status": 404
}
批量导入数据：
POST:
192.168.31.125:9200/customer/external/_bulk
json参数语法：
{"index":{"_id":"1"}} 文档1的主键
{"name":"zhao"} 文档1的内容
{"index":{"_id":"2"}} 文档2的主键
{"name":"qian"} 文档2的主键
复杂批量实例：
POST /_bulk
{ "delete": { "_index": "website", "_type": "blog", "_id": "123" }}
{ "create": { "_index": "website", "_type": "blog", "_id": "123" }}
{ "title": "My first blog post" }
{ "index": { "_index": "website", "_type": "blog" }}
{ "title": "My second blog post" }
{ "update": { "_index": "website", "_type": "blog", "_id": "123"}}
{ "doc":{"title":"My updated blog post"} }
POST /_bulk
{ “delete”: { “_index”: “website”, “_type”: “blog”, “_id”: “123” }} 删除
{ “create”: { “_index”: “website”, “_type”: “blog”, “_id”: “123” }}创建
{ “title”: “My first blog post” } 创建的内容
{ “index”: { “_index”: “website”, “_type”: “blog” }} 插入
{ “title”: “My second blog post” } 插入的内容
{ “update”: { “_index”: “website”, “_type”: “blog”, “_id”: “123”}} 更新
{ “doc”:{“title”:“My updated blog post”} } 更新的内容
