docker、elasticsearch8、springboot3集成备忘-编程知识

一、背景

二、安装docker

三、下载安装elasticsearch

四、下载安装elasticsearch-head

五、springboot集成elasticsearch

一、背景

前两年研究了一段时间elasticsearch，当时也是网上找了很多资料，最后解决个各种问题可以在springboot上运行了，本来是想记录下解决过程，但是由于某些原因就搁置了下来。最近手头有个项目正好需要用到elasticsearch，再拿起来的时候发现很多地方都不记得了，于是花了2天时间又搞了下，终于可以正常运行了，这次准备花点时间把遇到的一些问题、解决方法以及需要注意的地方记录下，便于日后需要时查看。

二、安装docker

2.1、从官网下载docker，好像需要科学上网，如果不行的话就随便百度个下载吧。

2.2、安装3个Windows功能，如下图

2.3、安装WSL，在命令行窗口执行wsl --install，如果安装不成功的话可以尝试从微软应用商店安装（好像只有win10可以搜到这个），搜索wsl，如下图

2.4、安装docker，这个没啥需要特别记录的

2.5、执行wsl --version查看当前使用的是不是wsl2，如果不是wsl2并且docker也确实不能正常启动的话，可以尝试切换到wsl2试试，切换命令为：wsl --set-default-version 2

三、下载安装elasticsearch

3.1、根据springboot版本下载对应的elasticsearch镜像，对应关系如下表：

Spring Data Release Train	Spring Data Elasticsearch	Elasticsearch	Spring Framework	Spring Boot
2023.1 (Vaughan)	5.2.x	8.11.1	6.1.x	3.2.x
2023.0 (Ullmann)	5.1.x	8.7.1	6.0.x	3.1.x
2022.0 (Turing)	5.0.x[1]	8.5.3	6.0.x	3.0.x
2021.2 (Raj)	4.4.x[1]	7.17.3	5.3.x	2.7.x
2021.1 (Q)	4.3.x[1]	7.15.2	5.3.x	2.6.x
2021.0 (Pascal)	4.2.x[1]	7.12.0	5.3.x	2.5.x
2020.0 (Ockham)	4.1.x[1]	7.9.3	5.3.2	2.4.x
Neumann	4.0.x[1]	7.6.2	5.2.12	2.3.x
Moore	3.2.x[1]	6.8.12	5.2.12	2.2.x
Lovelace	3.1.x[1]	6.2.2	5.1.19	2.1.x
Kay	3.0.x[1]	5.5.0	5.0.13	2.0.x
Ingalls	2.1.x[1]	2.4.0	4.3.25	1.5.x

也可以到spring官网查看最新的对应关系

3.2、下载指定版本的elasticsearch镜像：

docker pull elasticsearch:8.11.0

3.3、安装镜像：

docker run --name elastic -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" -d elasticsearch:8.11.0

3.4、进入镜像修改配置

3.4.1、进入容器控制台：

docker exec -it elastic /bin/bash

3.4.2、进入bin目录：cd bin

3.4.3、修改密码：

elasticsearch-setup-passwords interactive

3.4.4、下载配置文件到本地修改：

docker cp elastic:/usr/share/elasticsearch/config/elasticsearch.yml d:/

3.4.5、在文件末尾添加（不添加的话elasticsearch-head连接时会报跨域错误）

                http.cors.enabled: true
                http.cors.allow-origin: "*"
                http.cors.allow-headers: Authorization

3.4.6、上传覆盖原文件：

docker cp d:\elasticsearch.yml elastic:/usr/share/elasticsearch/config/

3.5、添加IK分词插件

3.5.1、下载IK分词插件，新建一个IK目录，解压到目录中。

3.5.2、上传IK文件夹

docker cp d:\xxx\ik elastic:\usr\share\elasticsearch\plugins\

3.5.3、重启elastic

docker restart elastic

3.6、JDK导入证书（不是必须）

3.6.1、从elasticsearch下载证书

docker cp elastic:/usr/share/elasticsearch/config/certs/http_ca.crt d:\下载目录

3.6.2、打开控制台，进入JDK证书目录

cd C:\Program Files\Java\jdk-18.0.2.1\lib\security

3.6.3、执行命令导入证书

C:\Program Files\Java\jdk-18.0.2.1\binkeytool -keystore cacerts -importcert -alias "es_http_ca" -file d:/下载目录/http_ca.crt

四、下载安装elasticsearch-head

4.1、下载elasticsearch-head

docker pull mobz/elasticsearch-head:5

4.2、安装容器：

docker run --name elastic-head -p 9100:9100 -d mobz/elasticsearch-head:5

4.3、在地址栏输入http://localhost:9100/?auth_user=elastic&auth_password=xxxxx，查看连接elastic是否成功，注意：使用https连接elasticsearch：http://localhost:9200

五、springboot集成elasticsearch

5.1、springboot3.2.0集成elasticsearch8.11.0运行正常，不过从官方文档看3.2.x要求是8.11.1。下面是必须的一些包。

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>3.2.0-SNAPSHOT</version></parent><properties><java.version>17</java.version></properties><dependencies><dependency><groupId>io.github.hakky54</groupId><artifactId>sslcontext-kickstart</artifactId><version>7.4.7</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-elasticsearch</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency></dependencies>
</project>

5.2、新建配置类

package com.rwzhang.elastic.elasticsearchdemo.config;import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.json.jackson.JacksonJsonpMapper;
import co.elastic.clients.transport.ElasticsearchTransport;
import co.elastic.clients.transport.rest_client.RestClientTransport;
import nl.altindag.ssl.SSLFactory;
import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestClientBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.elasticsearch.repository.config.EnableElasticsearchRepositories;
import org.springframework.data.repository.query.QueryLookupStrategy;@Configuration
@EnableElasticsearchRepositories(queryLookupStrategy = QueryLookupStrategy.Key.CREATE_IF_NOT_FOUND,basePackages = "com.elastic.elasticsearchdemo.repository")
public class ElasticsearchConfig {@Beanpublic ElasticsearchClient elasticsearchClient(){SSLFactory sslFactory = SSLFactory.builder().withUnsafeTrustMaterial().withUnsafeHostnameVerifier().build();final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials("elastic", "密码"));RestClientBuilder builder = RestClient.builder(new HttpHost("localhost", 9200, "https"));builder = builder.setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider).setSSLContext(sslFactory.getSslContext()).setSSLHostnameVerifier(sslFactory.getHostnameVerifier()));RestClient restClient = builder.build();ElasticsearchTransport transport = new RestClientTransport(restClient, new JacksonJsonpMapper());return new ElasticsearchClient(transport);}
}

5.3、新建实体类

public class News implements Serializable {@Id@Field(store=true, index = false, type = FieldType.Integer)Integer id;@Field(analyzer="ik_max_word", searchAnalyzer="ik_smart", type = FieldType.Text)String title;@Field(analyzer="ik_max_word", searchAnalyzer="ik_smart", type = FieldType.Text)String content;public News(String title, String content) {this.title = title;this.content = content;}
}

5.4、新建repository

@Repository
public interface NewsRepository extends ElasticsearchRepository<News, Integer> {@Highlight(fields = {@HighlightField(name = "content")},parameters = @HighlightParameters(preTags = {"<span style='color:red'>"},postTags = {"</span>"},numberOfFragments = 10, //片段个数fragmentSize = 100  //片段长度))List<SearchHit<News>> findByContent(String content, Pageable pageable);long countByContent(String content);
}

5.5、新建测试类

@RunWith(SpringRunner.class)
@SpringBootTest
class ElasticsearchDemoApplicationTests {@ResourceNewsRepository newsRepository;@Testvoid countByContent() {long count = newsRepository.countByContent("足球");System.out.println(StrUtil.format("countByContent: {}", count));}
}