准备工作－引依赖

<dependencies>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-server-ui</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>vip.mate</groupId>
            <artifactId>mate-starter-common</artifactId>
        </dependency>
    </dependencies>

实战工作－写代码

新建启动类，增加@EnableAdminServer注解

新建配置文件，设置登录页面

package vip.mate.admin.config;

import com.alibaba.cloud.nacos.NacosDiscoveryProperties;
import com.alibaba.cloud.nacos.discovery.NacosWatch;
import de.codecentric.boot.admin.server.config.AdminServerProperties;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.web.authentication.SavedRequestAwareAuthenticationSuccessHandler;

@Configuration
public class SecurityPermitAllConfiguration extends WebSecurityConfigurerAdapter {

    private final String adminContextPath;

    public SecurityPermitAllConfiguration(AdminServerProperties adminServerProperties) {
        this.adminContextPath = adminServerProperties.getContextPath();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
        successHandler.setTargetUrlParameter("redirectTo");

        http.headers().frameOptions().disable()
                .and()
                .authorizeRequests()
                .antMatchers(adminContextPath + "/assets/**").permitAll()
                .antMatchers(adminContextPath + "/login").permitAll()
                .anyRequest().authenticated()
                .and()
                .formLogin().loginPage(adminContextPath + "/login").successHandler(successHandler).and()
                .logout().logoutUrl(adminContextPath + "/logout").and()
                .httpBasic().and()
                .csrf().disable();
    }

    @Bean
    @ConditionalOnMissingBean
    @ConditionalOnProperty(value = "spring.cloud.nacos.discovery.watch.enabled", matchIfMissing = true)
    public NacosWatch nacosWatch(NacosDiscoveryProperties nacosDiscoveryProperties) {
        return new NacosWatch(nacosDiscoveryProperties);
    }
}

收尾工作－写配置

在application.yml或者bootstrap.yml里填写配置信息

server:
  port: 30001
spring:
  application:
    name: @artifactId@
  boot:
    admin:
      ui:
        title: @artifactId@-server
  security:
    user:
      name: "admin"
      password: "admin"

参考案例

如果你看这个不过瘾，直接来下演示吧：
参考工程代码