Elasticsearch：None of the configured nodes are available

背景：

为了研究Elasticsearch的评分机制使用，使用docker快速搭建了elasticsearch；使用spring boot连接ES的时候报错：无法找到节点

环境：

【jdk】：1.8   

【ES】：6.5.4 单节点 (ip:172.26.0.251)

【springboot】：2.1.2

 

代码片段：

es的elasticsearch.yml配置：

cluster.name: "docker-cluster"
network.host: 0.0.0.0
node.name: cloud
http.cors.enabled: true
http.cors.allow-origin: "*"
node.master: true
node.data: true

工程的 application.yml

spring.data.elasticsearch.cluster-name = docker-cluster
spring.data.elasticsearch.cluster-nodes = 172.26.0.251:9300
spring.data.elasticsearch.repositories.enabled = true
spring.data.elasticsearch.client-transport-sniff = true #嗅探设置

pom.xml 文件中只引入相关包

        
            org.elasticsearch.client
            transport
        
        
            org.nlpcn
            elasticsearch-sql
        

es连接配置类

@Configuration
@EnableConfigurationProperties(ElasticsearchProperties.class)
@ConditionalOnClass(TransportClient.class)
public class ElasticsearchAutoConfiguration {
    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    private ElasticsearchProperties elasticsearchProperties;

    public ElasticsearchAutoConfiguration(ElasticsearchProperties elasticsearchProperties) {
        logger.debug("ElasticsearchAutoConfiguration elasticsearchProperties:{}", JSON
                .toJSONString(elasticsearchProperties));
        this.elasticsearchProperties = elasticsearchProperties;
    }

    @Bean(destroyMethod = "close")
    public TransportClient client() throws Exception {
        TransportClient client = new PreBuiltTransportClient(settings());

        String clusterNodes = elasticsearchProperties.getClusterNodes();
        Assert.hasText(clusterNodes, "[Assertion failed] clusterNodes settings missing.");

        for (String clusterNode : split(clusterNodes, ElasticsearchProperties.COMMA)) {
            String hostName = substringBeforeLast(clusterNode, ElasticsearchProperties.COLON);
            String port = substringAfterLast(clusterNode, ElasticsearchProperties.COLON);
            Assert.hasText(hostName, "[Assertion failed] missing host name in 'clusterNodes'");
            Assert.hasText(port, "[Assertion failed] missing port in 'clusterNodes'");
            logger.info("adding transport node : " + clusterNode);
            client.addTransportAddress(new TransportAddress(InetAddress.getByName
                    (hostName), Integer.valueOf(port)));
        }
        client.connectedNodes();
        return client;
    }

    @Bean
    public ElasticClientKit elasticClientKit() throws Exception {
        ElasticClientKit elasticClientKit = new ElasticClientKit();
        elasticClientKit.setTransportClient(client());

        return elasticClientKit;
    }

    @Bean
    public ElasticAdminKit elasticAdminKit() throws Exception {
        ElasticAdminKit elasticAdminKit = new ElasticAdminKit();
        elasticAdminKit.setTransportClient(client());

        return elasticAdminKit;
    }

    private Settings settings() {
        return Settings.builder()
                .put("cluster.name", elasticsearchProperties.getClusterName())
                .put("client.transport.sniff", elasticsearchProperties.getClientTransportSniff())
                .put("client.transport.ignore_cluster_name", elasticsearchProperties
                        .getClientIgnoreClusterName())
                .put("client.transport.ping_timeout", elasticsearchProperties
                        .getClientPingTimeout())
                .put("client.transport.nodes_sampler_interval", elasticsearchProperties
                        .getClientNodesSamplerInterval())
                //.put("xpack.security.user", "elastic:1qaz2wsx")
                .build();
    }
}

控制台错误信息：

2019-04-16 13:46:18.257 [svr-demo] ERROR 4492 --- [nio-9999-exec-2] c.j.p.w.e.GlobalExceptionHandler         : None of the configured nodes are available: [{#transport#-1}{_56HAY5MSUefZh10v5asSQ}{172.26.0.251}{172.26.0.251:9300}]

org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: [{#transport#-1}{_56HAY5MSUefZh10v5asSQ}{172.26.0.251}{172.26.0.251:9300}]
	at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:349)
	at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:247)
	at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:60)
	at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:381)
	at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:407)
	at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:396)
	at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:46)
	at org.elasticsearch.action.ActionRequestBuilder.get(ActionRequestBuilder.java:53)
	at com.jkzl.phr.elasticsearch.ElasticClientKit.count(ElasticClientKit.java:442)
	at com.jkzl.phr.elasticsearch.ElasticClientKit.list(ElasticClientKit.java:446)
	at com.jkzl.phr.elasticsearch.ElasticClientKit.list(ElasticClientKit.java:233)
	at com.jkzl.phr.elasticsearch.ElasticClientKit.list(ElasticClientKit.java:227)
	at com.jkzl.phr.demo.score.service.ElkScoreService.getMapList(ElkScoreService.java:17)
	at com.jkzl.phr.demo.score.controller.ElkScoreDemoController.find(ElkScoreDemoController.java:34)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)
	

分析：

可能原因：通过错误分析可能是集群名称，或者端口错误，或者无法连接到集群节点

1. 检查工程中的集群名称和交互端口是否和es服务的配置文件中一致（本例中一致，所以排除）

2. 查看es的启动日志，检查es服务器的监听IP和对外访问的IP地址

[root@master-251 overlay2]# docker logs -f elasticsearch
...省略...
[2019-04-16T05:45:56,648][INFO ][o.e.t.TransportService   ] [ehrCloud] publish_address {172.17.0.3:9300}, bound_addresses {0.0.0.0:9300}
[2019-04-16T05:45:56,796][INFO ][o.e.x.s.t.n.SecurityNetty4HttpServerTransport] [ehrCloud] publish_address {172.17.0.3:9200}, bound_addresses {0.0.0.0:9200}
[2019-04-16T05:45:56,797][INFO ][o.e.n.Node               ] [ehrCloud] started

因为boot工程中 使用client.transport.sniff为true，使客户端去嗅探整个集群的状态，把集群中其它机器的ip地址加到客户端中。这样做的好处是，一般你不用手动设置集群里所有集群的ip到连接客户端，它会自动帮你添加，并且自动发现新加入集群的机器

看上面的日志可以发现ES服务器监听到的IP是172.17.0.3，这是docker内部分配的IP；在自动发现时会使用docker内网IP进行通信，导致无法连接到ES服务器

处理：

方式一：修改boot工程配置，关闭嗅探

设置工程中的client.transport.sniff为false，关闭嗅探；或者直接使用addTransportAddress方法把集群中其它机器的ip地址加到客户端中

方式二：修改ES服务器配置,将publish_host改为服务器的ip而不是docker分配的内部IP

修改elasticsearch.yml配置

cluster.name: "docker-cluster"
network.host: 0.0.0.0
#修改监听的IP为本机的IP地址
network.publish_host: 172.26.0.251
network.bind_host: 0.0.0.0
node.name: cloud
http.cors.enabled: true
http.cors.allow-origin: "*"
node.master: true
node.data: true

重启docker

[root@master-251 overlay2]# docker restart elasticsearch
...省略...
[2019-04-16T06:30:00,908][INFO ][o.e.n.Node               ] [ehrCloud] starting ...
[2019-04-16T06:30:01,197][INFO ][o.e.t.TransportService   ] [ehrCloud] publish_address {172.26.0.251:9300}, bound_addresses {0.0.0.0:9300}
[2019-04-16T06:30:01,489][INFO ][o.e.x.s.t.n.SecurityNetty4HttpServerTransport] [ehrCloud] publish_address {172.26.0.251:9200}, bound_addresses {0.0.0.0:9200}
[2019-04-16T06:30:01,490][INFO ][o.e.n.Node               ] [ehrCloud] started
[2019-04-16T06:30:01,694][INFO ][o.w.a.d.Monitor          ] [ehrCloud] try load config from /usr/share/elasticsearch/config/analysis-ik/IKAnalyzer.cfg.xml
[2019-04-16T06:30:01,696][INFO ][o.w.a.d.Monitor          ] [ehrCloud] try load config from /usr/share/elasticsearch/plugins/elasticsearch-analysis-ik/config/IKAnalyzer.cfg.xml
[2019-04-16T06:30:01,992][INFO ][o.w.a.d.Monitor          ] [ehrCloud] [Dict Loading] /usr/share/elasticsearch/plugins/elasticsearch-analysis-ik/config/customer/new_word.dic
[2019-04-16T06:30:02,821][WARN ][o.e.x.s.a.s.m.NativeRoleMappingStore] [ehrCloud] Failed to clear cache for realms [[]]

可以发现publish_address已经变为服务器IP（注意elasticsearch.yml中如果配置network.publish_host：0.0.0.0的话 监听的ip还是docker分配的内部IP，不知道是什么原因）

谨记：

这个问题基本坑了我一天的时间，起初以为是boot的elasticsearch版本和ES服务版本冲突问题，忙活了半天，后面发现这个client-transport-sniff = true 不起眼的配置，查询了不少文章才发现该问题；本文章为了谨记自己，由于水平有限，文章讲的不清楚或者不对的地方欢迎指出。

参考连接：

https://blog.csdn.net/ljc2008110/article/details/48630609

https://discuss.elastic.co/t/no-node-available-elasticsearch-transport-client-cant-connect-to-docker-container/94883