es更新换代很快，目前已经升级到了最新的8.5.1版本，网上8.x相关的部署和应用文档还不全，在这里做个记录。
安装及部署
这里主要讲docker部署:
# 下载镜像
docker pull docker.elastic.co/elasticsearch/elasticsearch:8.5.0
# 运行es容器
docker run -d --name es -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:8.5.0
# 拷贝配置文件到服务器本地，进行修改，修改内容如下：
docker cp es:/usr/share/elasticsearch/config/elasticsearch.yml /data/elasticsearch/config/elasticsearch.yml
# elasticsearch.yml新增以下配置，开启跨域.
http.cors.enabled: true
http.cors.allow-origin: "*"
http.cors.allow-headers: Authorization
# 开启xpack安全验证（默认已经开启了）.
xpack.security.enabled: true
# 关闭https校验(我不需要，所以关了).
xpack.security.http.ssl:
enabled: false
# 重启es
docker restart es
# 进入es容器内部，设置密码：
docker exec -it es /bin/bash
cd bin
elasticsearch-setup-passwords interactive
# 然后依次输入密码，最后再重启es.
docker retart es
然后在浏览器中安装 Multi Elasticsearch Head 扩展程序，安装完后，添加http://ip:9200 即可输入用户名 elastic 以及刚才设置的密码进行登录，成功登录表示es安装及设置正常.
spring boot 集成
- pom文件中引入相关依赖
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.13.2</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>jakarta.json</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>co.elastic.clients</groupId>
<artifactId>elasticsearch-java</artifactId>
<version>8.5.0</version>
</dependency>
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>elasticsearch-rest-client</artifactId>
<version>8.5.0</version>
</dependency>
-
yml文件中新增es的相关配置
elasticsearch: host: es-ip port: 端口9200 userName: elastic password: xxxx -
配置es的连接
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 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.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; /** * es配置. * * @author missMubu * @createTime 2022-11-04 * @since 3.1.0 */ @Configuration public class ElasticsearchConfig { @Value("${elasticsearch.host}") private String host; @Value("${elasticsearch.port}") private int port; @Value("${elasticsearch.userName}") private String userName; @Value("${elasticsearch.password}") private String password; /** * 初始化es-client. * * @return RestHighLevelClient */ @Bean public ElasticsearchClient elasticsearchClient() { final CredentialsProvider credentialsProvider = new BasicCredentialsProvider(); // 设置账号密码. credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(userName, password)); RestClient restClient = RestClient.builder(new HttpHost(host, port)) .setHttpClientConfigCallback(httpClientBuilder -> httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider)).build(); ElasticsearchTransport transport = new RestClientTransport(restClient, new JacksonJsonpMapper()); return new ElasticsearchClient(transport); } }
基本使用
/**
* es service.
*
* @author missMubu
* @createTime 2022-11-04
* @since 3.1.0
*/
@Service
@Slf4j
public class ElasticsearchService {
@Resource
private ElasticsearchClient client;
/**
* 判断索引是否存在.
*
* @param indexName index名称
*/
public boolean existIndex(String indexName) {
try {
BooleanResponse booleanResponse = client.indices().exists(e -> e.index(indexName));
return booleanResponse.value();
} catch (IOException e) {
throw new EsExcepotion("向es中检测索引【{}】出错，错误信息为：{}", indexName, e.getMessage());
}
}
/**
* 创建索引.
*
* @param indexName index名称
*/
public void createIndex(String indexName) {
try {
client.indices().create(c -> c.index(indexName));
} catch (IOException e) {
throw new EsExcepotion("向es中创建索引【{}】出错，错误信息为：{}", indexName, e.getMessage());
}
}
/**
* 添加记录.
*
*/
public void addDocument(AppLog appLog, String indexName) {
try {
if (!this.existIndex(indexName)) {
this.createIndex(indexName);
}
client.index(i -> i.index(indexName).id(appLog.getId()).document(appLog));
} catch (IOException e) {
throw new EsExcepotion("向es中添加dockument出错!", e.getMessage());
}
}
/**
* 批量添加.
*
* @param appLogList 添加的数量集合
* @param indexName indexName
*/
public void batchAddDocument(List<AppLog> appLogList, String indexName) {
if (!this.existIndex(indexName)) {
this.createIndex(indexName);
}
BulkRequest.Builder br = new BulkRequest.Builder();
appLogList.forEach(appLog -> br.operations(op -> op
.index(idx -> idx
.index(indexName)
.id(appLog.getId())
.document(appLog)
))
);
try {
BulkResponse result = client.bulk(br.build());
if (result.errors()) {
log.error("Bulk had errors");
for (BulkResponseItem item : result.items()) {
if (item.error() != null) {
log.error(item.error().reason());
}
}
}
} catch (IOException e) {
throw new EsExcepotion(e, "向es中添加dockument出错");
}
}
/**
* 根据索引名称和字段查询数据.
*
* @param indexName 索引名称
* @param filedValue 查询字段值
* @param filedName 查询字段名称
*/
public List<AppLog> findApplogs(String indexName, String filedName, String filedValue) {
try {
SearchResponse<AppLog> searchResponse = client.search(s -> s.index(indexName)
.query(q -> q
.match(t -> t
.field(filedName)
.query(filedValue)
)),
AppLog.class);
List<Hit<AppLog>> hitList = searchResponse.hits().hits();
List<AppLog> appLogList = new ArrayList<>();
for (Hit<AppLog> mapHit : hitList) {
appLogList.add(mapHit.source());
}
return appLogList;
} catch (IOException e) {
throw new EsExcepotion("【查询 -> 失败】从es中查询分析后的日志出错，错误信息为：{}", e.getMessage());
}
}
}
