ElasticSearch7.x基于Java API 快照备份和恢复

快照备份

1. 配置es环境
我这里用的是windowns版本的，在es官网下载压缩包
https://www.elastic.co/cn/downloads/elasticsearch
解压后在connfig找到elasticsearch.yml进行以下配置修改

1. 服务名称 cluster.name: my-application
2. 节点名称 node.name: node-1
3. 快照本地路径 path.repo: [E:/es/data]
4. 地址network.host: localhost
5. 端口 http.port: 9200

在 bin 目录下，找到elasticsearch.bat 双击 启动es

2.创建好springboot项目进行测试

依赖说一下，避免找不到对应jar包里的方法，当使用springboot + Elasticsearch时，需要明确指定依赖.

   
        7.9.3
    
     
            org.elasticsearch.client
            elasticsearch-rest-high-level-client
            ${elasticsearch.version}
        

        
            org.elasticsearch
            elasticsearch
            ${elasticsearch.version}
        

        
            org.apache.logging.log4j
            log4j-core
            2.17.0
        

        
            org.apache.logging.log4j
            log4j-api
            2.17.0
        

        
            junit
            junit
            test
        

        
            com.fasterxml.jackson.core
            jackson-databind
        

1. 创建快照仓库

   RestHighLevelClient client = new RestHighLevelClient(
   RestClient.builder(new HttpHost(“localhost”,9200))
   );
   System.out.println(“es已成功链接”);
   //创建快照仓库
   PutRepositoryRequest request = new PutRepositoryRequest();
   request.name(“my_backup0001”);
   request.type(FsRepository.TYPE);
   request.masterNodeTimeout(TimeValue.timeValueMinutes(1));
   request.verify(true);

       String locationKey = FsRepository.LOCATION_SETTING.getKey();
       String locationValue = "my_fs_data_location";
       String compressKey = FsRepository.COMPRESS_SETTING.getKey();
       boolean compressValue = true;
   
       Map map = new HashMap<>();
       map.put(locationKey, locationValue);
       map.put(compressKey, compressValue);
       request.settings(map);
   
       AcknowledgedResponse response = client.snapshot().createRepository(request, RequestOptions.DEFAULT);
   
       //确认是否响应
       boolean acknowledged = response.isAcknowledged();
       System.out.println("创建快照仓库是否成功:"+acknowledged);
       client.close();
       System.out.println("es已关闭");
   

测试结果

2. 创建快照

   RestHighLevelClient client = new RestHighLevelClient(
   RestClient.builder(new HttpHost(“localhost”,9200))
   );
   System.out.println(“es已成功链接”);
   //快照开始时间
   System.out.println(“快照开始时间:” + new Date());
   //创建快照
   CreateSnapshotRequest request = new CreateSnapshotRequest();
   //快照仓库名称
   request.repository(“my_backup0001”);
   //快照名称
   String snapshotName = “backup”+System.currentTimeMillis();
   request.snapshot(snapshotName);
   //快照的索引 第一次全量备份，以后是增量备份
   request.indices(“shopping_demo”, “test_demo”);
   request.indicesOptions(IndicesOptions.fromOptions(false, false, true, true));
   request.partial(false);
   request.includeGlobalState(true);
   request.masterNodeTimeout(“1m”);
   request.waitForCompletion(true);
   //同步请求客户端
   CreateSnapshotResponse response = client.snapshot().create(request, RequestOptions.DEFAULT);
   //快照信息
   SnapshotInfo snapshotInfo = response.getSnapshotInfo();
   //快照索引信息
   System.out.println(snapshotInfo.indices());
   //快照结束时间
   System.out.println(“快照结束时间:” + snapshotInfo.endTime());
   //快照创建响应状态 200 ok
   RestStatus status = response.status();
   System.out.println(“es快照响应状态:”+status);

       client.close();
       System.out.println("es已关闭");
   

测试结果

3.快照恢复
先删除一个索引，请求方式delete，使用http的方式
http://localhost:9200/shopping_demo
这是删除前的es索引列表

删除后的es索引列表

shopping_demo这个索引已被删除，现在开始恢复索引

 RestHighLevelClient client = new RestHighLevelClient(
                RestClient.builder(new HttpHost("localhost",9200))
        );
        System.out.println("es已成功链接");
        //仓库名称
        String repositoryName = "my_backup0001";
        //快照名称
        String snapshotName = "backup1644456687246";
        //恢复快照
        RestoreSnapshotRequest request = new RestoreSnapshotRequest(repositoryName, snapshotName);
        //需要恢复的索引名称
        request.indices("shopping_demo");
        request.masterNodeTimeout("1m");
        request.waitForCompletion(true);
        request.partial(false);
        request.includeGlobalState(false);
        request.includeAliases(false);
        //同步
        RestoreSnapshotResponse response = client.snapshot().restore(request, RequestOptions.DEFAULT);
        RestoreInfo restoreInfo = response.getRestoreInfo();
        List indices = restoreInfo.indices();
        for (String s : indices){
            System.out.println("恢复索引名称:" + s);
        }
        client.close();
        System.out.println("es已关闭");

索引再次恢复了，里面数据也还在，这些只是一些基本操作，写的不好的或者有好的建议请大家指正，谢谢!