spring boot 向nacos注冊方式，以及遇見的報錯（boot！boot! 不是cloud！）

一、首先添加nacos注冊發現的pom依賴

        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>nacos-discovery-spring-boot-starter</artifactId>
            <version>0.2.3</version>
        </dependency>

二、application.properties文件中添加nacos的配置

nacos.discovery.server-addr=你的nacos地址:你的nacos端口

 三、在項目啟動類中添加配置，啟動時向nacos注冊服務

    @NacosInjected
    private NamingService namingService;
    @Value("${spring.application.name}")
    private String applicationName;
    @PostConstruct
    public void registerInstance() throws NacosException {
        namingService.registerInstance(applicationName,"127.0.0.1",9193);
    }

以上就是spring boot 的注冊方式，比較簡單，項目啟動后注冊成功

 

 但是在第一次配置的時候發生了一些問題，項目啟動報錯：注冊失敗，然后追蹤

namingService.registerInstance方法的源碼，發現是調用httpclient注冊的時候報錯，源碼中有一部分代碼如下：

 public String callServer(String api, Map<String, String> params, String curServer, String method) throws NacosException {
        List<String> headers = Arrays.asList("Client-Version", "Nacos-Java-Client:v0.2.1", "Accept-Encoding", "gzip,deflate,sdch", "Connection", "Keep-Alive", "RequestId", UuidUtil.generateUuid());
        if (!curServer.contains(":")) {
            curServer = curServer + ":" + 8848;
        }

        String url = HttpClient.getPrefix() + curServer + api;
        HttpResult result = HttpClient.request(url, headers, params, "UTF-8", method); if (200 == result.code) {
            return result.content;
        } else if (304 == result.code) {
            return "";
        } else {
            LogUtils.LOG.error("CALL-SERVER", "failed to req API:" + HttpClient.getPrefix() + curServer + api + ". code:" + result.code + " msg: " + result.content);
            throw new NacosException(500, "failed to req API:" + HttpClient.getPrefix() + curServer + api + ". code:" + result.code + " msg: " + result.content);
        }
    }

發現，http接口的返回結果報錯：cluster name can only have these characters: 0-9a-zA-Z-

查了很多資料發現是pom引入的版本問題，改為最新版本，注冊成功