参考：
官方文档：
https://codecentric.github.io/spring-boot-admin/current/#_what_is_spring_boot_admin

配置解读

Client端配置

Server端配置

一、SprinBoot项目

Ⅰ服务端配置

1.新建项目，启动类加上@EnableAdminServer

@SpringBootApplication
@EnableAdminServer
public class SpringbootadminApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringbootadminApplication.class, args);
    }
}

2.引入依赖

<!--springbootadmin-->
<dependency>
    <groupId>de.codecentric</groupId>
    <artifactId>spring-boot-admin-starter-server</artifactId>
    <version>2.6.7</version>
</dependency>
<!--springbootsecurity-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

3.springbootsecurity登录配置类

import de.codecentric.boot.admin.server.config.AdminServerProperties;
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(proxyBeanMethods = false)
public class SecuritySecureConfig extends WebSecurityConfigurerAdapter {
    private final String adminContextPath;
    public SecuritySecureConfig(AdminServerProperties adminServerProperties) {
        this.adminContextPath = adminServerProperties.getContextPath();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
        successHandler.setTargetUrlParameter( "redirectTo" );
        http.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();
    }
}

4.application.yml

server:
  port: 19998
spring:
  application:
    name: 服务监控中心
  boot:
    admin:
      ui:
        title: 服务监控中心
        brand: 服务监控中心
  security:
    user:
      name: 'xqny'
      password: 'xqny'
logging:
  file:
    name: ./logs/adminsever.log

Ⅱ客户端配置

1.引入依赖

<!--spring-boot-admin客户端-->
<dependency>
    <groupId>de.codecentric</groupId>
    <artifactId>spring-boot-admin-starter-client</artifactId>
    <version>2.6.7</version>
</dependency>
<!--spring-boot-admin资源监控-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
    <version>2.7.0</version>
</dependency>

2.application.yml

server:
  port: 18008
spring:
  profiles:
    active: prod
  application:
    name: 数字孪生
  boot:
    admin:
      client:
        url: http://192.168.1.8:19998
        username: 'xqny'
        password: 'xqny'
        instance:
          prefer-ip: true #true 注册时 admin 中显示IP地址不显示主机名
management:
  endpoints:
    web:
      exposure:
        include: '*'
    enabled-by-default: true
  endpoint:
    health:
      show-details: ALWAYS
  health:
    elasticsearch:
      enabled: false
    logfile:
      external-file: './logs/szls.log'
logging:
  file:
    name: ./logs/szls.log

3.logback-spring.xml
logback-spring.xml
(trace等级可以打印actuator的日志)

<logger name="org.springframework.boot.actuate.endpoint.web.servlet"/>

二、SpringCloud项目

原理：将springbootadmin-sever注册到nacos

Ⅰ服务端配置

1.新建项目，启动类加上@EnableAdminServer

@SpringBootApplication
@EnableAdminServer
public class SpringbootadminApplication {
    public static void main(String[] args) {
        SpringApplication.run(SpringbootadminApplication.class, args);
    }
}

2.引入依赖

<!--springbootadmin-->
<dependency>
    <groupId>de.codecentric</groupId>
    <artifactId>spring-boot-admin-starter-server</artifactId>
    <version>2.5.5</version>
</dependency>
<!--springbootsecurity-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<!--注册中心客户端-->
<dependency>
   <groupId>com.alibaba.cloud</groupId>
   <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!--配置中心客户端-->
<dependency>
   <groupId>com.alibaba.cloud</groupId>
   <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>

3.springbootsecurity登录配置类

import de.codecentric.boot.admin.server.config.AdminServerProperties;
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(proxyBeanMethods = false)
public class SecuritySecureConfig extends WebSecurityConfigurerAdapter {
    private final String adminContextPath;
    public SecuritySecureConfig(AdminServerProperties adminServerProperties) {
        this.adminContextPath = adminServerProperties.getContextPath();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
        successHandler.setTargetUrlParameter( "redirectTo" );
        http.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();
    }
}

4.application.yml

server:
  port: 8090
spring:
  profiles:
    active: prod
  application:
    name: admin-server
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
     config:     
        server-addr: 127.0.0.1:8848
  security:
    user:
      name: 'admin'
      password: 'admin'

Ⅱ客户端配置

1.引入依赖

<!--spring-boot-admin客户端-->
<dependency>
    <groupId>de.codecentric</groupId>
    <artifactId>spring-boot-admin-starter-client</artifactId>
    <version>2.5.5</version>
</dependency>
<!--spring-boot-admin资源监控-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
    <version>2.5.5</version>
</dependency>
<!--注册中心客户端-->
<dependency>
   <groupId>com.alibaba.cloud</groupId>
   <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>
<!--配置中心客户端-->
<dependency>
   <groupId>com.alibaba.cloud</groupId>
   <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
</dependency>

2.application.yml

server:
  port: 18008
logging:
  file:
    name: ./logs/admin-client-logtest.log
  pattern:
    file: '%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n'
  level:
    org:
      springframework:
        web: info
spring:
  profiles:
    active: prod
  application:
    name: admin-client-logtest
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
     config:     
        server-addr: 127.0.0.1:8848  
  boot:
    admin:
      client:
        url: http://127.0.0.1:8090
        username: 'admin'
        password: 'admin'
management:
  endpoints:
    web:
      exposure:
        include: '*'
    enabled-by-default: true
  endpoint:
    health:
      show-details: ALWAYS

三、自定义健康检查

https://blog.csdn.net/youanyyou/article/details/120375840

@Component
public class CustomHealthIndicator extends AbstractHealthIndicator {
    @Override
    protected void doHealthCheck(Health.Builder builder) throws Exception {
        // 使用 builder 来创建健康状态信息        
        // 如果你throw 了一个 exception，那么status 就会被置为DOWN，异常信息会被记录下来        
        builder.up().withDetail("app", "这个项目很健康").withDetail("error", "Nothing, I'm very good");
    }
}