elasticsearch部署

1  拉取elasticsearch镜像

     docker pull elasticsearch:7.7.0

2   创建文件映射路径

     mkdir /mydata/elasticsearch/data
     mkdir /mydata/elasticsearch/plugins
     mkdir /mydata/elasticsearch/config

3  文件夹授权
   

    chmod 777 /mydata/elasticsearch/data

4  修改配置文件

    cd /mydata/elasticsearch/config
    vi elasticsearch.yml
    填入如下内容：
    #集群名称
    cluster.name: "elasticsearch"
    network.host: 0.0.0.0
    #跨域设置
    http.cors.enabled: true
    http.cors.allow-origin: "*"
    #http端口
    http.port: 9200
   #java端口
   transport.tcp.port: 9300

5  运行镜像：

   docker run --name elasticsearch -p 9200:9200 -p 9300:9300 -d  -e "discovery.type=single-node" -e ES_JAVA_OPTS="-Xms512m -Xmx512m"  \
-v /mydata/elasticsearch/data:/usr/share/elasticsearch/data -v /mydata/elasticsearch/plugins:/usr/share/elasticsearch/plugins  \
-v /data/elasticsearch/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml elasticsearch:7.7.0

6  访问页面:

   http://192.168.56.102:9200 查看是否部署成功

如出现如上内容，表示elasticsearch部署成功，就可以进行搜索操作了

elasticsearch-head部署

    为了更好的使用elasticsearch，需要部署elasticsearch-head插件

1  #拉取镜像

      docker pull mobz/elasticsearch-head:5

  2  启动容器

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

   3 访问elasticsearch-head页面内容

        

elasticsearch-head的页面操作

    1  查询所有数据

                

   出现如上所示报错。解决方案如下：

  1  docker exec -it {elasticearch-head}容器名称 /bin/bash

   2  修改elasticsearch-head的js文件

       vi  /usr/src/app/_site/vendor.js

      a  第6886行 ：/contentType: "application/x-www-form-urlencoded
          改为 ：contentType: "application/json;charset=UTF-8"

       b  第7574行 var inspectData = s.contentType === "application/x-www-form-urlencoded" &&
           改为 var inspectData = s.contentType === "application/json;charset=UTF-8" &&

   3  重启elasticsearch-head容器

其他页面操作参见博客：

ElasticSearch-Head操作Elasticsearch进行查询数据（查询所有数据，查询单个索引所有数据，查询单个索引指定类型所有数据，根据指定条件查询数据）_elasticsearch-head 查询-CSDN博客

使用java操作elasticsearch

 1 引入依赖：

  

<dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>elasticsearch-rest-high-level-client</artifactId>
            <version>7.7.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.elasticsearch</groupId>
                    <artifactId>elasticsearch</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.elasticsearch</groupId>
            <artifactId>elasticsearch</artifactId>
            <version>7.7.0</version>
        </dependency>

2  相关crud操作

public class EsHandler {

    private static final String ES_SERVER_ADDRESS = "192.168.56.102";
    private static final String IDX_NAME = "employee";

    private static RestHighLevelClient CLIENT = null;

    public static void main(String[] args) throws IOException {
        // 初始化
        init();

        // 创建索引数据
        createIndex();
        // 修改数据
//        updateDoc();
        // 删除数据
//        deleteDoc();
        // 查询数据
//        searchDoc();

        // 关闭连接
        close();

    }

    private static void init() {
        CLIENT = new RestHighLevelClient(RestClient.builder(
                new HttpHost(ES_SERVER_ADDRESS,9200,"http")));

    }

    private static void close() throws IOException {
        CLIENT.close();
    }

    private static void createIndex() throws IOException {
        IndexRequest indexRequest = new IndexRequest(IDX_NAME);

        Map<String, String> insertInfo = new HashMap<>();
        insertInfo.put("name","wangwu");

        indexRequest.source(insertInfo);

        IndexResponse response = CLIENT.index(indexRequest, RequestOptions.DEFAULT);

        System.out.println("ID:" + response.getId() + "/t" + "RESULT:" + response.getResult());

    }

    private static void updateDoc() throws IOException {
        UpdateRequest updateRequest = new UpdateRequest(IDX_NAME,"8");

        // 注意此处的泛型类型：<String,Object>，如果是其他的泛型类型，es的api会认为是另一套api调用
        Map<String, Object> sourceInfo = new HashMap<>();
        sourceInfo.put("name","骡子摊");

//        updateRequest.doc("name","隆昌羊肉汤");

        updateRequest.doc(sourceInfo);

        updateRequest.timeout("1s");
        updateRequest.retryOnConflict(3);

        UpdateResponse response = CLIENT.update(updateRequest, RequestOptions.DEFAULT);

        System.out.println("ID:" + response.getId() + "/t" + "RESULT:" + response.getResult());
    }

    private static void deleteDoc() throws IOException {
        DeleteRequest deleteRequest = new DeleteRequest(IDX_NAME,"9");

        DeleteResponse response = CLIENT.delete(deleteRequest, RequestOptions.DEFAULT);

        System.out.println("ID:" + response.getId() + "/t" + "RESULT:" + response.getResult());
    }

    /**
     *
     * @throws IOException
     */
    private static void searchDoc() throws IOException {

        SearchSourceBuilder builder = new SearchSourceBuilder()
                .query(QueryBuilders.matchQuery("message", "execute"));

        SearchRequest searchRequest = new SearchRequest();
        searchRequest.indices("rizhi-log-*");
        searchRequest.source(builder);
        // 执行请求
        SearchResponse response = CLIENT.search(searchRequest, RequestOptions.DEFAULT);
        // 解析查询结果
        System.out.println(response.toString());
    }