es|2022-ES学习与实践

ES学习系列
核心场景:es5.x基于Flink-Connector-Elasticsearch实现EsSink
问题:添加权限控制,即x-pack相关实现。
解决:
ES5.x中,与es交互的client是TransportClient。
以下为flink-connector-es5源码:

@Override public TransportClient createClient(Map clientConfig) { Settings settings = Settings.builder() .put(NetworkModule.HTTP_TYPE_KEY, Netty3Plugin.NETTY_HTTP_TRANSPORT_NAME) .put(NetworkModule.TRANSPORT_TYPE_KEY, Netty3Plugin.NETTY_TRANSPORT_NAME) .put(clientConfig) .build(); TransportClient transportClient = new PreBuiltTransportClient(settings); for (TransportAddress transport : ElasticsearchUtils.convertInetSocketAddresses(transportAddresses)) { transportClient.addTransportAddress(transport); }return transportClient; }

PreBuiltTransportClient客户端中不包含x-pack相关实现,若要实现需要额外添加部分依赖
org.elasticsearch.client transport 5.5.3 org.elasticsearch.client x-pack-transport 5.5.3

【es|2022-ES学习与实践】重写Elasticsearch5ApiCallBridge类中的createClient方法:
@Override public TransportClient createClient(Map clientConfig) { Settings settings = Settings.builder() .put(CONFIG_CLUSTER_NAME, this.clusterName) .put(CONFIG_KEY_TRANSPORT_SSL, false) .put(CONFIG_KEY_TRANSPORT_SNIFF, true) // .put(NetworkModule.HTTP_TYPE_KEY, Netty3Plugin.NETTY_HTTP_TRANSPORT_NAME) // .put(NetworkModule.TRANSPORT_TYPE_KEY, Netty3Plugin.NETTY_TRANSPORT_NAME) .put(clientConfig) .build(); // PreBuiltXPackTransportClient需要导入x-pack包 TransportClient transportClient = new PreBuiltXPackTransportClient(settings); for (TransportAddress transport : ElasticsearchUtils.convertInetSocketAddresses(transportAddresses)) { transportClient.addTransportAddress(transport); } return transportClient; }

小结:
es5的客户端为TransportClient而不是RestHighLevelClient,TransportClient需要指定集群名称,连接端口需要是transport.tcp.port而不是http.port,这两个问题都会导致集群连接失败。
解决es5权限认证相关问题分两步:
  1. 引入x-pack相关依赖
  2. 重写createClient方法,把transportClient的实现类改为PreBuiltXPackTransportClient。
存疑:Flink-Connector-Elasticsearch5源码中Elasticsearch5ApiCallBridge类中的createClient方法中下面这两个连接参数不知道有啥作用
.put(NetworkModule.HTTP_TYPE_KEY, Netty3Plugin.NETTY_HTTP_TRANSPORT_NAME) .put(NetworkModule.TRANSPORT_TYPE_KEY, Netty3Plugin.NETTY_TRANSPORT_NAME)

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