springboot开启nacos鉴权 springboot admin nacos

一、环境说明：

• 采用SpringCloud为微服务架构，Nacos为注册中心，Springboot-Admin通过从Nacos获取到微服务的Ip地址。然后SpringBoot-Admin获得ip地址后通过http来请求微服务的接口信息。
• 为了安全，公司微服务的请求方式全部改为了Http2，所以不得不需要https请求，而Springboot-Admin官方也每没有相应的配置说明，为了解决这个问题在网上找了好多久，但网上的资料大多都是粘贴复制的，而且有的还有一些错误，都困扰我两天了，最后没办法看了错误日志通过看源码才得到解决。

二、解决方法

1、配置Admin客户端

spring:
#Admin Client的端点安全密码
  security:
    user:
        name: root
        password: root
  application:
    name: byr-provider
  cloud:
    nacos:
      discovery:
      # Nacos地址
        server-addr:xx.xx.xx.xx:8848
        metadata:
        # 通过Nacos将安全配置发送到Admin Server的Admin Client的端点安全密码
          user.name: ${spring.security.user.name}
          user.password: ${spring.security.user.password}
  boot:
    admin:
      client:
      # 这个URL地址是Admin Server的服务地址，你需要将你的应用注册到该地址上,前面的http://必须加上，不然会注册不成功
        url: http://localhost:8070
         # 配置连接到监测管理平台的Security安全密码
        username: admin
        password: admin
        instance:
         #用Ip地址来代替url中的hostname
          prefer-ip: true

• 这里我给每个admin客户端添加了安全设置。
• 通过Nacos将客户端的用户名、密码发送给admin 服务端。
• prefer-ip: true 必须要设置，不然admin客户端请求地址和Nacos不一致，造成不能监控的微服务。
• 设置完成后，进入Admin 管理界面，然后打开对应的微服务，你会发现：
  加配置之前：
  
  加配置之后：

2、解决Admin服务端异常

2.1 出现：PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target异常

在添加完那些配置后，Admin会这个错误，这因为Admin服务端没有安装Https 证书。
admin 微服务j监控界面：

获得目标机器有效证书：

package com.example.feign;

/**
 * @ClassName: InstallCert
 * @Description:
 * @Author: yanrong
 * @Date: 2020/1/20 10:21
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import javax.net.ssl.*;
import java.io.*;
import java.security.KeyStore;
import java.security.MessageDigest;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

public class InstallCert {

    public static void main(String[] args) throws Exception {
        String host;
        int port;
        char[] passphrase;
        // 目标机器Ip地址：端口，证书密匙
        args=new String[]{"192.168.61.1:8075","123456"};
        if ((args.length == 1) || (args.length == 2)) {
            String[] c = args[0].split(":");
            host = c[0];
            port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
            String p = (args.length == 1) ? "changeit" : args[1];
            passphrase = p.toCharArray();
        } else {
            System.out.println("Usage: java InstallCert <host>[:port] [passphrase]");
            return;
        }

        File file = new File("jssecacerts");
        if (file.isFile() == false) {
            char SEP = File.separatorChar;
            File dir = new File(System.getProperty("java.home") + SEP + "lib" + SEP + "security");
            file = new File(dir, "jssecacerts");
            if (file.isFile() == false) {
                file = new File(dir, "cacerts");
            }
        }
        System.out.println("Loading KeyStore " + file + "...");
        InputStream in = new FileInputStream(file);
        KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
        ks.load(in, passphrase);
        in.close();

        SSLContext context = SSLContext.getInstance("TLS");
        TrustManagerFactory tmf = TrustManagerFactory
                .getInstance(TrustManagerFactory.getDefaultAlgorithm());
        tmf.init(ks);
        X509TrustManager defaultTrustManager = (X509TrustManager) tmf
                .getTrustManagers()[0];
        SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
        context.init(null, new TrustManager[]{tm}, null);
        SSLSocketFactory factory = context.getSocketFactory();

        System.out
                .println("Opening connection to " + host + ":" + port + "...");
        SSLSocket socket = (SSLSocket) factory.createSocket(host, port);
        socket.setSoTimeout(10000);
        try {
            System.out.println("Starting SSL handshake...");
            socket.startHandshake();
            socket.close();
            System.out.println();
            System.out.println("No errors, certificate is already trusted");
        } catch (SSLException e) {
            System.out.println();
            e.printStackTrace(System.out);
        }

        X509Certificate[] chain = tm.chain;
        if (chain == null) {
            System.out.println("Could not obtain server certificate chain");
            return;
        }

        BufferedReader reader = new BufferedReader(new InputStreamReader(
                System.in));

        System.out.println();
        System.out.println("Server sent " + chain.length + " certificate(s):");
        System.out.println();
        MessageDigest sha1 = MessageDigest.getInstance("SHA1");
        MessageDigest md5 = MessageDigest.getInstance("MD5");
        for (int i = 0; i < chain.length; i++) {
            X509Certificate cert = chain[i];
            System.out.println(" " + (i + 1) + " Subject "
                    + cert.getSubjectDN());
            System.out.println("   Issuer  " + cert.getIssuerDN());
            sha1.update(cert.getEncoded());
            System.out.println("   sha1    " + toHexString(sha1.digest()));
            md5.update(cert.getEncoded());
            System.out.println("   md5     " + toHexString(md5.digest()));
            System.out.println();
        }

        System.out.println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
        String line = reader.readLine().trim();
        int k;
        try {
            k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
        } catch (NumberFormatException e) {
            System.out.println("KeyStore not changed");
            return;
        }

        X509Certificate cert = chain[k];
        String alias = host + "-" + (k + 1);
        ks.setCertificateEntry(alias, cert);

        OutputStream out = new FileOutputStream("jssecacerts");
        ks.store(out, passphrase);
        out.close();

        System.out.println();
        System.out.println(cert);
        System.out.println();
        System.out
                .println("Added certificate to keystore 'jssecacerts' using alias '"
                        + alias + "'");
    }

    private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();

    private static String toHexString(byte[] bytes) {
        StringBuilder sb = new StringBuilder(bytes.length * 3);
        for (int b : bytes) {
            b &= 0xff;
            sb.append(HEXDIGITS[b >> 4]);
            sb.append(HEXDIGITS[b & 15]);
            sb.append(' ');
        }
        return sb.toString();
    }

    private static class SavingTrustManager implements X509TrustManager {

        private final X509TrustManager tm;
        private X509Certificate[] chain;

        SavingTrustManager(X509TrustManager tm) {
            this.tm = tm;
        }

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            throw new UnsupportedOperationException();
        }

        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType)
                throws CertificateException {
            throw new UnsupportedOperationException();
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType)
                throws CertificateException {
            this.chain = chain;
            tm.checkServerTrusted(chain, authType);
        }
    }
}

• 直接在编译器中运行以上代码，然后会在项目中生成一个jssecacerts文件,这个就是我们生成的证书，然后你把证书拷贝到jdk的$JAVA_HOME/jre/lib/security这个目录下，我用的是如果是OpenJDK则放在在$JAVA_HOME/lib/security目录下；有的博客说是也可以通过System.setProperty("javax.net.ssl.trustStore", "你的jssecacerts证书路径");来设置，但是我试了不行，其他人可以试试。

2.2 出现：No subject alternative names present异常

出现这个异常时由于微服务中生成的证书缺失的IP地址，所系需要重新生成：
命令：keytool -genkey -alias tomcat2 -keyalg RSA -keystore ./jerry2.keystore -ext SAN=dns:localhost,ip:192.168.61.1

• jerry2.keystore：证书名字
• SAN=dns:localhost,ip:192.168.61.1: 我是在本机运行的所以DNS我直接写成了localhost，这个没有要求，后面的Ip地址就是微服务与运行主机的Ip地址，如果也是在本机运行的话也需要自己本机的IP地址，不要填写成127.0.0.1
• 重新配置微服务的证书。

2.3 重启admin 服务端和微服务

感谢参考

http://www.dengb.com/Javabc/1296188.html