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灰灰商城

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灰灰<a href=https://www.elefans.com/category/jswz/34/1769605.html style=商城"/>

灰灰商城

文章目录

  • 灰灰商城-分布式高级篇-1
    • 全文检索-ElasticSearch
      • docker 安装
        • 1、下载镜像文件
        • 2、创建实例
          • 1. 创建外部ElasticSearch配置文件
          • 2. 运行 ElasticSearch
          • 3. 运行kibana
          • 4. 访问 主机+端口
        • 3、初步检索
          • 1. _cat
          • 2. 索引一个文档（保存）
          • 3. 查询文档
          • 4. 更新文档
          • 5. 删除文档&索引
          • 7. 样本测试数据
        • 4、进阶检索
          • 1. SearchAPI
          • 2. Query DSL -> 查询领域对象语言
            • 1、一个查询语句的典型结构
            • 2、 match用法
            • 3、 match_phrase -> 短语匹配 (上述match的增强，模糊搜索以短语，不分词)
            • 4、 multi_match 多字段匹配
            • 5、 bool 复合查询
            • 6、 filter 结果过滤
            • 7、 term, 与match类似
            • 8、 aggregations (执行聚合)
          • 3. Mapping
            • 1、字段类型
            • 2、映射（Mapping）
            • 3、新版本下
            • 4、分词
        • 5、安装nginx（为自定义词库创建）
        • 6、Elasticsearch-Rest-Client
          • 1、9300:TCP
          • 2、9200:HTTP

灰灰商城-分布式高级篇-1

码云地址：

全文检索-ElasticSearch

docker 安装

1、下载镜像文件
docker pull elasticsearch:7.4.2
docker pull kibana:7.4.2-》elasticsearch的可视化工具
2、创建实例
1. 创建外部ElasticSearch配置文件
mkdir -p /mydata/elasticsearch/config
mkdir -p /mydata/elasticsearch/data
echo "http.host: 0.0.0.0" >> /mydata/elasticsearch/config/elasticsearch.yml
注意： 0.0.0.0之前有一个空格运行后报错->
Caused by: java.nio.file.AccessDeniedException: /usr/share/elasticsearch/data/nodes"查看日志-> docker logs elasticsearch
修改权限-任何用户，组可读写执行
chmod -R 777 /mydata/elasticsearch/
2. 运行 ElasticSearch
docker run --name elasticsearch -p 9200:9200 -p 9300:9300 \
-e "discovery.type=single-node" \
-e ES_JAVA_OPTS="-Xms64m -Xmx512m" \
-v /mydata/elasticsearch/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml \
-v /mydata/elasticsearch/data:/usr/share/elasticsearch/data \
-v /mydata/elasticsearch/plugins:/usr/share/elasticsearch/plugins \
-d elasticsearch:7.4.2

注意：-e ES_JAVA_OPTS="-Xms64m -Xmx512m"
设置占用内存
查看：
free -m

3. 运行kibana
docker run --name kibana -e ELASTICSEARCH_URL=http://192.168.80.133:9200 -p 5601:5601 -d kibana:7.4.2

注意主机改为当前的

http://192.168.80.133:9200/

4. 访问 主机+端口

http://192.168.80.133:9200/ ->返回json数据则成功
http://192.168.80.133:9200/_cat/nodes -> 查看节点

  • 注意：使用可视化界面报错，链接ElasticSearch异常
    http://192.168.80.133:5601/

前面第2点运行时ip为docker中ElasticSearch的IP，查看
docker inspect d66aba8770af |grep IPAddress
结果：查找到d66aba8770af的ip为->172.17.0.4

重新运行：
docker run --name kibana -e ELASTICSEARCH_URL=http://172.17.0.4:9200 -p 5601:5601 -d kibana:7.4.2

继续配置：
进入docker中Kibana文件配置
docker exec -it kibana /bin/bash
cd /usr/share/kibana/config/
vi kibana.yml
elasticsearch.hosts 改成你es容器的ip，然后将
xpack.monitoring.ui.container.elasticsearch.enabled 改成 false

3、初步检索

可使用postman 将GET等改为主机+端口

1. _cat

GET/_cat/nodes : 查看所有节点
GET/_cat/health : 查看es健康状况
GET/_cat/master : 查看主节点
GET/_cat/indices : 查看所有索引 ==>show databases;

2. 索引一个文档（保存）

保存一个数据，保存在哪个索引的哪个类型下，指定用哪个唯一标识
PUT customer /external/1; 在customer索引下的external类型下保存1号数据为

PUT customer/external/1

1号数据的信息：
{
“name”:“Wei-xhh”
}

PUT和POST都可以

POST新增。如果不指定id, 会自动生成id。指定id就会修改这个数据，并新增版本号

PUT可以新增可以修改。PUT必须指定id；由于PUT需要指定id, 我们一般都用来做修改操作，不指定id会报错。

返回结果：

{"_index": "customer","_type": "external","_id": "1","_version": 1,"result": "created","_shards": {"total": 2,"successful": 1,"failed": 0},"_seq_no": 0,"_primary_term": 1
}
3. 查询文档

GET customer/external/1

返回结果:

{"_index": "customer",  // 在哪个索引"_type": "external",    // 在哪个类型"_id": "1",                // 记录id"_version": 2,           // 版本号"_seq_no": 1,           // 并发控制字段，每次更新就会+1，用来做乐观锁"_primary_term": 1,   // 同上，主分片重新分配，如重启，就会变化"found": true,"_source": {            // 真正的内容"name": "Wei-xhh"}
}

更新携带 ?if_seq_no=0 & if_primary_term = 1

乐观锁->并发
1、小明修改1号数据->
http://192.168.80.133:9200/customer/external/1?if_seq_no=0&if_primary_term=1
2、小红修改1号数据->
http://192.168.80.133:9200/customer/external/1?if_seq_no=0&if_primary_term=1

情况：
小明修改了，->成功，对应的seq_no也自动修改
小红并不知道已经被小明修改，想要时修改失败 -> 错误码409
这时小红必须重新查询1号数据得到seq_no等于什么
查询后小红得到了seq_no=5，-> 重新发送请求
http://192.168.80.133:9200/customer/external/1?if_seq_no=5&if_primary_term=1
修改成功。

4. 更新文档

POST customer/external/1/_update

会对比原来数据，与原来一样就什么都不做

{"doc":{"name":"wei-xhh6666"}
}

结果：与原来一样就什么都不做 “result”: “noop”
_version，_seq_no不变

{"_index": "customer","_type": "external","_id": "1","_version": 5,"result": "noop","_shards": {"total": 0,"successful": 0,"failed": 0},"_seq_no": 7,"_primary_term": 1
}

或者

POST customer/external/1
不会检查原来的数据

{"name":"wei-xhh666"
}

或者

PUT customer/external/1
不会检查原来的数据

{"name":"wei-xhh66"
}

更新时也可以同时添加属性

5. 删除文档&索引

DELETE customer/external/1
DELETE customer

  1. bulk 批量API

POST customer/external/ _bulk

{"index":{"_id":"1"}}
{"name":"wei-xhh"}
{"index":{"_id":"2"}}
{"name":"wei-xhh66"}语法格式：
{action: {metadata}}\n
{request body}      \n
{action: {metadata}}\n
{request body}      \n复杂实例
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"}}
7. 样本测试数据

.json
可能访问不通

我有数据，如果找不到访问不了可以私我

POST /bank/account/_bulk

4、进阶检索
1. SearchAPI

ES支持两种基本方式检索：

  • 一个是通过使用 REST request URI 发送搜索参数 (uri+检索参数）

  • 另外一个是通过使用 REST request body 来发送它们 (url+请求体）

设置关机自动重启

docker update 容器id --restart=always

第一种方式：
GET bank/_search?q=*&sort=account_number:asc第二种方式：
GET bank/_search
{"query": {"match_all": {}},"sort": [{"account_number": "asc"},{"balance": "desc"}]
}
2. Query DSL -> 查询领域对象语言
1、一个查询语句的典型结构
{QUERY_NAME:{ARGUMENT:VALUE,ARGUMENT:VALUE,...}
}
  • 如果针对某个字段，那么他的结构如下：
{QUERY_NAME:{FIELD_NAME:{ARGUMENT:VALUE,ARGUMENT:VALUE,...}}  
}

例子

GET bank/_search
{"query": {"match_all": {}},"sort": [{"balance": {"order": "asc"}}],"from": 5,"size": 3,"_source": ["balance","age"]   // 指定值
}

结果：

{"took" : 1,"timed_out" : false,"_shards" : {"total" : 1,"successful" : 1,"skipped" : 0,"failed" : 0},"hits" : {"total" : {"value" : 1000,"relation" : "eq"},"max_score" : null,"hits" : [{"_index" : "bank","_type" : "account","_id" : "749","_score" : null,"_source" : {"balance" : 1249,"age" : 36},"sort" : [1249]},{"_index" : "bank","_type" : "account","_id" : "402","_score" : null,"_source" : {"balance" : 1282,"age" : 32},"sort" : [1282]},{"_index" : "bank","_type" : "account","_id" : "315","_score" : null,"_source" : {"balance" : 1314,"age" : 33},"sort" : [1314]}]}
}
2、 match用法

精确查询

GET bank/_search
{"query": {"match": {"account_number": "20"}}
}

模糊查询 -> 分词匹配

GET bank/_search
{"query": {"match": {"address": "Kings"}}
}
3、 match_phrase -> 短语匹配 (上述match的增强，模糊搜索以短语，不分词)
//不分词匹配
GET bank/_search
{"query": {"match_phrase": {"address": "mill lane"}}
}

结果：

{"took" : 1058,"timed_out" : false,"_shards" : {"total" : 1,"successful" : 1,"skipped" : 0,"failed" : 0},"hits" : {"total" : {"value" : 1,"relation" : "eq"},"max_score" : 9.507477,"hits" : [{"_index" : "bank","_type" : "account","_id" : "136","_score" : 9.507477,"_source" : {"account_number" : 136,"balance" : 45801,"firstname" : "Winnie","lastname" : "Holland","age" : 38,"gender" : "M","address" : "198 Mill Lane","employer" : "Neteria","email" : "winnieholland@neteria","city" : "Urie","state" : "IL"}}]}
}
4、 multi_match 多字段匹配
GET bank/_search
{"query": {"multi_match": {"query": "mill movice","fields": ["address","city"]}}
}

结果：

{"took" : 12,"timed_out" : false,"_shards" : {"total" : 1,"successful" : 1,"skipped" : 0,"failed" : 0},"hits" : {"total" : {"value" : 4,"relation" : "eq"},"max_score" : 5.4032025,"hits" : [{"_index" : "bank","_type" : "account","_id" : "970","_score" : 5.4032025,"_source" : {"account_number" : 970,"balance" : 19648,"firstname" : "Forbes","lastname" : "Wallace","age" : 28,"gender" : "M","address" : "990 Mill Road","employer" : "Pheast","email" : "forbeswallace@pheast","city" : "Lopezo","state" : "AK"}},{"_index" : "bank","_type" : "account","_id" : "136","_score" : 5.4032025,"_source" : {"account_number" : 136,"balance" : 45801,"firstname" : "Winnie","lastname" : "Holland","age" : 38,"gender" : "M","address" : "198 Mill Lane","employer" : "Neteria","email" : "winnieholland@neteria","city" : "Urie","state" : "IL"}},{"_index" : "bank","_type" : "account","_id" : "345","_score" : 5.4032025,"_source" : {"account_number" : 345,"balance" : 9812,"firstname" : "Parker","lastname" : "Hines","age" : 38,"gender" : "M","address" : "715 Mill Avenue","employer" : "Baluba","email" : "parkerhines@baluba","city" : "Blackgum","state" : "KY"}},{"_index" : "bank","_type" : "account","_id" : "472","_score" : 5.4032025,"_source" : {"account_number" : 472,"balance" : 25571,"firstname" : "Lee","lastname" : "Long","age" : 32,"gender" : "F","address" : "288 Mill Street","employer" : "Comverges","email" : "leelong@comverges","city" : "Movico","state" : "MT"}}]}
}
5、 bool 复合查询

复合查询可以合并任何其他查询语句，包括复合语句，这就意味则，复合语句之间可以互相嵌套，可以表达非常复杂的逻辑

GET bank/_search

{"query": {"bool": {"must": [{"match": {"gender": "F"}},{"match": {"address": "mill"}}],"must_not": [{"match": {"age": "18"}}],"should": [{"match": {"lastname": "Wallace"}}]}}
}

结果：

{"took" : 109,"timed_out" : false,"_shards" : {"total" : 1,"successful" : 1,"skipped" : 0,"failed" : 0},"hits" : {"total" : {"value" : 1,"relation" : "eq"},"max_score" : 6.1104345,"hits" : [{"_index" : "bank","_type" : "account","_id" : "472","_score" : 6.1104345,"_source" : {"account_number" : 472,"balance" : 25571,"firstname" : "Lee","lastname" : "Long","age" : 32,"gender" : "F","address" : "288 Mill Street","employer" : "Comverges","email" : "leelong@comverges","city" : "Movico","state" : "MT"}}]}
}
6、 filter 结果过滤

并不是所有的查询都需要产生分数，特别是那些仅用于filtering (过滤)的文档，为了不计算分数Elasticsearch会自动检查场景并且优化查询的执行。

GET bank/_search
{"query": {"bool": {"filter": {"range": {"age": {"gte": 19,"lte": 30}}}}}
}
7、 term, 与match类似

模糊检索推荐使用match -> 文本字段使用
精确检索推荐使用term -> 非文本字段使用


GET bank/_search
{"query": {"term": {"age": "28"}}
}

match的精确查找


GET bank/_search
{"query": {"match": {"address.keyword": "789 Madison Street"}}
}
8、 aggregations (执行聚合)

聚合提供了从数据中分组和提取数据的能力，最简单的聚合方法大致等于 SQL GROUP BY 和 SQL聚合函数。在Elasticsearch中，您有执行搜索返回hits(命中结果)，并且同时返回聚合结果，把一个响应的所有hits(命中结构)分隔开的能力。可以执行查询和多个聚合，并且在一次使用中得到各自的(任何一个的)返回结果，使用一次简洁和简化的API来避免网络往返。

  • 搜索address中包含mill的所有人的年龄分布以及平均年龄，但不显示这些人的详情。
GET bank/_search
{"query": {"match": {"address": "mill"}},"aggs": {"ageAgg": {"terms": {"field": "age","size": 10}},"ageAvg": {"avg": {"field": "age"}}}
}

结果

{"took" : 4643,"timed_out" : false,"_shards" : {"total" : 1,"successful" : 1,"skipped" : 0,"failed" : 0},"hits" : {"total" : {"value" : 4,"relation" : "eq"},"max_score" : 5.4032025,"hits" : [{"_index" : "bank","_type" : "account","_id" : "970","_score" : 5.4032025,"_source" : {"account_number" : 970,"balance" : 19648,"firstname" : "Forbes","lastname" : "Wallace","age" : 28,"gender" : "M","address" : "990 Mill Road","employer" : "Pheast","email" : "forbeswallace@pheast","city" : "Lopezo","state" : "AK"}},{"_index" : "bank","_type" : "account","_id" : "136","_score" : 5.4032025,"_source" : {"account_number" : 136,"balance" : 45801,"firstname" : "Winnie","lastname" : "Holland","age" : 38,"gender" : "M","address" : "198 Mill Lane","employer" : "Neteria","email" : "winnieholland@neteria","city" : "Urie","state" : "IL"}},{"_index" : "bank","_type" : "account","_id" : "345","_score" : 5.4032025,"_source" : {"account_number" : 345,"balance" : 9812,"firstname" : "Parker","lastname" : "Hines","age" : 38,"gender" : "M","address" : "715 Mill Avenue","employer" : "Baluba","email" : "parkerhines@baluba","city" : "Blackgum","state" : "KY"}},{"_index" : "bank","_type" : "account","_id" : "472","_score" : 5.4032025,"_source" : {"account_number" : 472,"balance" : 25571,"firstname" : "Lee","lastname" : "Long","age" : 32,"gender" : "F","address" : "288 Mill Street","employer" : "Comverges","email" : "leelong@comverges","city" : "Movico","state" : "MT"}}]},"aggregations" : {"ageAgg" : {"doc_count_error_upper_bound" : 0,"sum_other_doc_count" : 0,"buckets" : [{"key" : 38,"doc_count" : 2},{"key" : 28,"doc_count" : 1},{"key" : 32,"doc_count" : 1}]},"ageAvg" : {"value" : 34.0},"balanceAvg" : {"value" : 25208.0}}
}

可嵌套聚合（道理类似）

3. Mapping
1、字段类型

7.0版本可有可无
未来8.0将取消。
直接将文档存在某个索引下。
去掉type就是为了提高ES处理数据的效率。

2、映射（Mapping）

Mapping是用来定义一个文档，以及它所包含的属性是如何存储和索引的。
比如使用mapping来定义。

  • 哪些字符串属性应该被看做全文本属性。

  • 哪些属性包含数字，日期或者地理位置。

  • 文档中的所有属性是否都能被索引

  • 日期的格式

  • 自定义映射规则来执行动态添加属性。

  • 查看mapping信息：

    • GET bank/_mapping

  • 修改mapping信息

3、新版本下
  • 创建映射

规定 my_index 这个索引下的属性类型

PUT /my_index
{"mappings": {"properties": {"age": {"type": "integer"},"email":{"type": "keyword"},"name":{"type": "text"}}}
}
  • 添加新的字段映射
PUT /my_index/_mapping
{"properties": {"employee-id": {"type": "keyword","index": false}}
}
  • 更新映射

对于已经存在的映射字段，我们不能更新，更新必须创建新的索引进行数据迁移。

  • 数据迁移

先创建出 new_twitter 的正确映射。然后使用如下方式进行数据迁移

修改bank下的mapping

  1. 创建新的索引，指定mapping规则

PUT /newbank

{"mappings": {"properties": {"account_number": {"type": "long"},"address": {"type": "text"},"age": {"type": "integer"},"balance": {"type": "long"},"city": {"type": "keyword"},"email": {"type": "keyword"},"employer": {"type": "keyword"},"firstname": {"type": "text"},"gender": {"type": "text"},"lastname": {"type": "text","fields": {"keyword": {"type": "keyword","ignore_above": 256}}},"state": {"type": "keyword"}}}
}

结果

{"acknowledged" : true,"shards_acknowledged" : true,"index" : "newbank"
}
  1. 数据迁移
POST _reindex
{"source": {"index": "bank","type": "account"},"dest": {"index": "newbank"}
}
4、分词

一个tokenizer(分词器)接收一个字符流，将之分割为独立的tokens(词元，通常是独立的单词)，然后输出tokens流。

例如，whitespace tokenizer 遇到空白字符是分割文本，它会将文本 “Quick brown fox!”分割为[Quick, brown, fox!]

该tokenizer（分词器）还负责记录各个term（词条）的顺序或position位置（用于phrase短语和word proximtiy词近邻查询），以及term所代表的原始word的start和end的character offsets（字符偏移量）（用于高亮显示搜索的内容）

  • 标准分词器
POST _analyze
{"tokenizer": "standard","text": "The 2 QUICK Brown-Foxes jumped over the lazy dog's bone."
}
  • 安装自己的分词器（ik）

/
下载对应版本，可以复制下载地址到迅雷下，非常快

进入容器内部

docker exec -it 容器id /bin/bash
  • ik zip 解压

unzip elasticsearch-analysis-ik-7.4.2.zip

修改权限
chmod -R 777 ik/

重启elasticsearch。

  • 使用ik
    ik_smart
POST _analyze
{"tokenizer": "ik_smart","text": "欢迎您的到来"
}

结果

{"tokens" : [{"token" : "欢迎您","start_offset" : 0,"end_offset" : 3,"type" : "CN_WORD","position" : 0},{"token" : "的","start_offset" : 3,"end_offset" : 4,"type" : "CN_CHAR","position" : 1},{"token" : "到来","start_offset" : 4,"end_offset" : 6,"type" : "CN_WORD","position" : 2}]
}

ik_max_word

POST _analyze
{"tokenizer": "ik_max_word","text": "欢迎您的到来"
}

额外
安装wget,unzip

yum install wget
yum install unzip
  • 自定义词库

修改/usr/share/elasticsearch/plugins/ik/config中的IKAnalyzer.cfg.xml
直接修改外部挂载的文件

重启容器 -》 如果测试失败 -》看下面第5步最后一点

5、安装nginx（为自定义词库创建）

  • 随便启动一个nginx实例，只是为了复制出配置

    • docker run -p 80:80 --name nginx -d nginx:1.10

  • 将容器内的配置文件拷贝到当前目录；docker container cp nginx:/etc/nginx . (后面还有个点,且点前面有空格)

  • 修改文件名称：mv nginx conf 把这个conf移动到/mydata/nginx下

  • 终止原容器：docker stop nginx

  • 删除容器 docker rm 容器id

  • 创建新的nginx

docker run -p 80:80 --name nginx
-v /mydata/nginx/html:/usr/share/nginx/html
-v /mydata/nginx/logs:/var/log/nginx
-v /mydata/nginx/conf:/etc/nginx
-d nginx:1.10

  • 访问 主机地址

在/mydata/nginx/html中创建index.html

  • 创建分词文本

mkdir es
vi fenci.txt

访问：
http://192.168.80.133/es/fenci.txt

  • 注意问题：我使用的docker需要像之前安装kibana找到ealsticsearch一样，需要得到docker帮它创建的ip,不能直接使用主机ip修改IKAnalyzer.cfg.xml

如图


这样就可以配置成功。

6、Elasticsearch-Rest-Client
1、9300:TCP
  • spring-data-elasticsearch:transport-api.jar
    • spirngboot版本不同
    • 7.x已经不建议使用；8后就要废弃
2、9200:HTTP
  • JestClient：非官方；更新慢
  • RestTemplate：模拟发送HTTP请求，ES很多操作需要自己分装，麻烦
  • HttpClient：同上
  • Elasticsearch-Rest-Client：官方RestClient，封装了ES操作，API层次分明，上手简单

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