spring boot admin项目的集成和开发

Spring Boot Admin是一个Github上的一个开源项目，它在Spring Boot Actuator的基础上提供简洁的可视化WEB UI，是用来管理 Spring Boot 应用程序的一个简单的界面，提供如下功能：

显示 name/id 和版本号
显示在线状态
Logging日志级别管理
JMX beans管理
Threads会话和线程管理
Trace应用请求跟踪
应用运行参数信息，如：
Java 系统属性
Java 环境变量属性
内存信息
Spring 环境属性
Spring Boot Admin 包含服务端和客户端，按照以下配置可让Spring Boot Admin运行起来。

二、入门
1. 创建 Spring Boot Admin Server
pom.xml

官网应用如下

https://codecentric.github.io/spring-boot-admin/current/#_customizing_login_logo

整个pom文件如下

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gf</groupId>
    <artifactId>admin-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>admin-server</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-boot-admin.version>2.1.0</spring-boot-admin.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-dependencies</artifactId>
                <version>${spring-boot-admin.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.yml

server:
  port: 9999
spring:
  application:
    name: service-admin
logging:
  file: "/logs/boot-admin-sample.log"  # 日志输出路径
               

启动类 AdminServerApplication

启动类加上@EnableAdminServer注解，开启AdminServer的功能：

package com.tuling.cloud.study;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.Configuration;

import de.codecentric.boot.admin.server.config.EnableAdminServer;

@Configuration
@EnableAutoConfiguration
@EnableAdminServer
public class SpringBootAdminServer {

  public static void main(String[] args) {
    SpringApplication.run(SpringBootAdminServer.class, args);
  }
}

2. 创建 Spring Boot Admin Client

pom.xml

这里没有引入acturor jar包，因为admin client默认就帮我们引入了

整个pom文件如下

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gf</groupId>
    <artifactId>admin-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>admin-client</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-boot-admin.version>2.1.0</spring-boot-admin.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-dependencies</artifactId>
                <version>${spring-boot-admin.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.yml
spring.boot.admin.client.url：要注册的Spring Boot Admin Server的URL。
management.endpoints.web.exposure.include：与Spring Boot 2一样，默认情况下，大多数actuator的端口都不会通过http公开，* 代表公开所有这些端点。对于生产环境，应该仔细选择要公开的端点。

spring:
  application:
    name: admin-client
  boot:
    admin:
      client:
        url: http://localhost:9999
server:
  port: 8768

management:
  endpoints:
    web:
      exposure:
        include: '*'
  endpoint:
    health:
      show-details: ALWAYS

启动类 AdminClientApplication

package com.tuling.cloud.study;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * 使用Eureka做服务发现.
 */
@SpringBootApplication
public class SpringBootAdminClient {
  public static void main(String[] args) {
    SpringApplication.run(SpringBootAdminClient.class, args);
  }
}

启动两个工程，在浏览器上输入localhost:9999 ，浏览器显示的界面如下：

特别需要注意的是：在spring boot admin的页面上要显示日志，需要做下面的配置手动指定logfile的位置

三、spring boot admin server集成 Eureka

1. 创建 sc-eureka-server

这是一个 eureka-server 注册中心。

整个pom文件如下

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gf</groupId>
    <artifactId>sc-admin-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sc-admin-server</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-boot-admin.version>2.1.0</spring-boot-admin.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>
        <dependency>
            <groupId>org.jolokia</groupId>
            <artifactId>jolokia-core</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-dependencies</artifactId>
                <version>${spring-boot-admin.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.yml  spring boot admin server也是注册中心的客户端，需要向注册中心进行注册

server:
  port: 9999
spring:
  application:
    name: service-admin
eureka:
  client:
    registryFetchIntervalSeconds: 5
    service-url:
      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
  instance:
    leaseRenewalIntervalInSeconds: 10
    health-check-url-path: /actuator/health
logging:
  file: "/logs/boot-admin-sample.log"  # 日志输出路径
               

启动类 ScAdminServerApplication

package com.tuling.cloud.study;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.context.annotation.Configuration;

import de.codecentric.boot.admin.server.config.EnableAdminServer;

@Configuration
@EnableAutoConfiguration
@EnableAdminServer
@EnableDiscoveryClient
public class SpringBootAdminServerWithEureka {

  public static void main(String[] args) {
    SpringApplication.run(SpringBootAdminServerWithEureka.class, args);
  }
}

启动类中一定要添加上@EnableDiscoveryClient注解

接下来我们修改spring boot admin 的客户端

这是一个 Spring Boot Admin client 端。

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gf</groupId>
    <artifactId>sc-admin-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sc-admin-client</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-boot-admin.version>2.1.0</spring-boot-admin.version>
        <spring-cloud.version>Finchley.SR2</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-dependencies</artifactId>
                <version>${spring-boot-admin.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.yml

spring:
  application:
    name: admin-client
server:
  port: 8768

eureka:
  client:
    registryFetchIntervalSeconds: 5
    service-url:
      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
  instance:
    leaseRenewalIntervalInSeconds: 10
    health-check-url-path: /actuator/health  

management:
  endpoints:
    web:
      exposure:
        include: '*'
  endpoint:
    health:
      show-details: ALWAYS

启动类

package com.tuling.cloud.study;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

/**
 * 使用Eureka做服务发现.
 */
@SpringBootApplication
@EnableDiscoveryClient
public class SpringBootAdminClientWithEureka {
  public static void main(String[] args) {
    SpringApplication.run(SpringBootAdminClientWithEureka.class, args);
  }
}

admin 会自己拉取 Eureka 上注册的 app 信息，主动去注册。这也是唯一区别之前入门中手动注册的地方，就是 client 端不需要 admin-client 的依赖，也不需要配置 admin 地址了，一切全部由 admin-server 自己实现。这样的设计对环境变化很友好，不用改了admin-server后去改所有app 的配置了。

四、集成 Spring Security
Web应用程序中的身份验证和授权有多种方法，因此Spring Boot Admin不提供默认方法。默认情况下，spring-boot-admin-server-ui提供登录页面和注销按钮。我们结合 Spring Security 实现需要用户名和密码登录的安全认证。

sc-admin-server工程的pom文件需要增加以下的依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

整个配置文件变成下面的形式

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.gf</groupId>
    <artifactId>sc-admin-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sc-admin-server</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <spring-boot-admin.version>2.1.0</spring-boot-admin.version>
        <spring-cloud.version>Finchley.RELEASE</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>
        <dependency>
            <groupId>org.jolokia</groupId>
            <artifactId>jolokia-core</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-dependencies</artifactId>
                <version>${spring-boot-admin.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

在 sc-admin-server工的配置文件 application.yml 中配置 spring security 的用户名和密码，这时需要在服务注册时带上 metadata-map 的信息，如下：

spring:
  security:
    user:
      name: "admin"
      password: "admin"

eureka:
  instance:
    metadata-map:
      user.name: ${spring.security.user.name}
      user.password: ${spring.security.user.password}

 application配置文件如下

server:
  port: 9999
spring:
  application:
    name: service-admin
  security:
    user:
      name: "admin"
      password: "admin"
eureka:
  client:
    registryFetchIntervalSeconds: 5
    service-url:
      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
  instance:
    leaseRenewalIntervalInSeconds: 10
    health-check-url-path: /actuator/health
    metadata-map:
      user.name: ${spring.security.user.name}
      user.password: ${spring.security.user.password}
logging:
  file: "/logs/boot-admin-sample.log"  # 日志输出路径
             

@EnableWebSecurity注解以及WebSecurityConfigurerAdapter一起配合提供基于web的security。继承了WebSecurityConfigurerAdapter之后，再加上几行代码，我们就能实现要求用户在进入应用的任何URL之前都进行验证的功能，写一个配置类SecuritySecureConfig继承WebSecurityConfigurerAdapter，配置如下：

@Configuration
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 {
        // @formatter:off
        SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
        successHandler.setTargetUrlParameter("redirectTo");
        successHandler.setDefaultTargetUrl(adminContextPath + "/");

        http.authorizeRequests()
                //授予对所有静态资产和登录页面的公共访问权限。
                .antMatchers(adminContextPath + "/assets/**").permitAll()
                .antMatchers(adminContextPath + "/login").permitAll()
                //必须对每个其他请求进行身份验证
                .anyRequest().authenticated()
                .and()
                //配置登录和注销
                .formLogin().loginPage(adminContextPath + "/login").successHandler(successHandler).and()
                .logout().logoutUrl(adminContextPath + "/logout").and()
                //启用HTTP-Basic支持。这是Spring Boot Admin Client注册所必需的
                .httpBasic().and();
        // @formatter:on
    }
}

整个配置类如下

package com.tuling.cloud.study;

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;

import de.codecentric.boot.admin.server.config.AdminServerProperties;

@Configuration
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 {
        // @formatter:off
        SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
        successHandler.setTargetUrlParameter("redirectTo");
        successHandler.setDefaultTargetUrl(adminContextPath + "/");

        http.authorizeRequests()
                //授予对所有静态资产和登录页面的公共访问权限。
                .antMatchers(adminContextPath + "/assets/**").permitAll()
                .antMatchers(adminContextPath + "/login").permitAll()
                //必须对每个其他请求进行身份验证
                .anyRequest().authenticated()
                .and()
                //配置登录和注销
                .formLogin().loginPage(adminContextPath + "/login").successHandler(successHandler).and()
                .logout().logoutUrl(adminContextPath + "/logout").and()
                //启用HTTP-Basic支持。这是Spring Boot Admin Client注册所必需的
                .httpBasic().and();
        // @formatter:on
    }
}

重新访问 http://localhost:9999/ 会出现登录界面，密码是 配置文件中配置好的，账号 admin 密码 admin，界面如下：

五、通知

1. 邮件通知

在 Spring Boot Admin 中 当注册的应用程序状态更改为DOWN、UNKNOWN、OFFLINE 都可以指定触发通知，下面讲解配置邮件通知。

在sc-admin-server工程pom文件，加上mail的依赖，如下：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>

在配置文件application.yml文件中，配置收发邮件的配置：

spring:
  mail:
    host: smtp.163.com
    username: xxxx@163.com
    password: xxxx
    properties:
      mail:
        smtp:
          auth: true
          starttls:
            enable: true
            required: true
  boot:
    admin:
      notify:
        mail:
          from: xxxx@163.com
          to: xxxx@qq.com

配置后，重启sc-admin-server工程，之后若出现注册的客户端的状态从 UP 变为 OFFLINE 或其他状态，服务端就会自动将电子邮件发送到上面配置的收件地址。

注意 : 配置了邮件通知后，会出现 反复通知 service offline / up。这个问题的原因在于 查询应用程序的状态和信息超时，下面给出两种解决方案：

#方法一：增加超时时间（单位:ms）

spring.boot.admin.monitor.read-timeout=20000

#方法二：关闭闭未使用或不重要的检查点

management.health.db.enabled=false
management.health.mail.enabled=false
management.health.redis.enabled=false
management.health.mongo.enabled=false

Spring Boot Admin Server 配置属性详解

https://codecentric.github.io/spring-boot-admin/current/#spring-cloud-discovery-support

在admin boot Server中加上下面的配置

server:
  port: 9999
spring:
  application:
    name: service-admin
  security:
    user:
      name: "admin"
      password: "admin"
  boot:
    admin:
      monitor:
        read-timeout: 20000
eureka:
  client:
    registryFetchIntervalSeconds: 5
    service-url:
      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
  instance:
    leaseRenewalIntervalInSeconds: 10
    health-check-url-path: /actuator/health
    metadata-map:
      user.name: ${spring.security.user.name}
      user.password: ${spring.security.user.password}
logging:
  file: "/logs/boot-admin-sample.log"  # 日志输出路径
             

在spring boot admin client客户端加上下面的配置

spring:
  application:
    name: admin-client
server:
  port: 8768

eureka:
  client:
    registryFetchIntervalSeconds: 5
    service-url:
      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
  instance:
    leaseRenewalIntervalInSeconds: 10
    health-check-url-path: /actuator/health  

management:
  endpoints:
    web:
      exposure:
        include: '*'
  endpoint:
    health:
      show-details: ALWAYS
      redis:
        enabled: false
      db:
        enabled: false
      mongo:
        enabled: false
      mail:
        enabled: false
    

全部组件如下

2. 自定义通知
可以通过添加实现Notifier接口的Spring Beans来添加您自己的通知程序，最好通过扩展 AbstractEventNotifier或AbstractStatusChangeNotifier。在sc-admin-server工程中编写一个自定义的通知器：

所有的功能在官方提供的英文文档里面都有说明

https://codecentric.github.io/spring-boot-admin/current/#spring-cloud-discovery-support

所谓的离线功能就是如下

之前admin-client

1、在spring admin min中设置要监听哪些服务，哪些服务不监听

在admin server中的配置文件如下所示

server:
  port: 9999
spring:
  application:
    name: service-admin
  security:
    user:
      name: "admin"
      password: "admin"
  boot:
    admin:
      monitor:
        read-timeout: 20000
      discovery:
        services: admin-client

eureka:
  client:
    registryFetchIntervalSeconds: 5
    service-url:
      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
  instance:
    leaseRenewalIntervalInSeconds: 10
    health-check-url-path: /actuator/health
    metadata-map:
      user.name: ${spring.security.user.name}
      user.password: ${spring.security.user.password}
logging:
  file: "/logs/boot-admin-sample.log"  # 日志输出路径
             

这里我们只能监听 admin-client这个服务，其他服务是无法进行监听的

spring boot admin Environment Manager的作用

支持Spring Cloud的postable,env和refresh-endpoint。我们可以集中配置我们程序中的配置，可以运用我们admin后台来修改配置类解决线上一些突发情况。

 支持Spring Cloud的postable,env和refresh-endpoint。我们可以集中配置我们程序中的配置，可以运用我们admin后台来修改配置类解决线上一些突发情况。

/env 和 /env/{toMatch}

该端点与 /configprops 不同，它用来获取应用所有可用的环境属性报告。包括：环境变量、JVM属性、应用的配置配置、命令行中的参数。从下面该端点返回的示例片段中，我们可以看到它不仅返回了应用的配置属性，还返回了系统属性、环境变量等丰富的配置信息，其中也包括了应用还没有使用的配置。所以它可以帮助我们方便地看到当前应用可以加载的配置信息，并配合@ConfigurationProperties注解将它们引入到我们的应用程序中来进行使用。另外，为了配置属性的安全，对于一些类似密码等敏感信息，该端点都会进行隐私保护，但是我们需要让属性名中包含：password、secret、key这些关键词，这样该端点在返回它们的时候会使用*来替代实际的属性值。2

我们在spring boot admin 的中增加一个配置文件

package com.tuling.cloud.study;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

@Component
@ConfigurationProperties(prefix = "test")
public class Student {

    private String name;
    private Integer age;
    private String sex;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    @Override
    public String  toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", sex='" + sex + '\'' +
                '}';
    }
}

我们在配置文件中设置下面的配置

application.properties

test.name=fei
test.age=20
test.sex=man

我们在ui上可以看到下面的值

上面会显示程序中所有使用@ConfigurationProperties注解

值如下

现在我们要动态的修改上面属性的值，可以如下

【动态修改环境变量值】
2. 在Environment manager中可以指定property-name,修改property-value，然后update environment。可修改多个
3. 修改后的值在 PropertySource manager 中会显示，在/env端点中也会显示。在@ConfigurationProperties绑定的类中的值会更新。此操作可用来动态更新业务配置
4. 点击 Reset environment，修改的所有值会还原。@ConfigurationProperties绑定的类中的值也还原
5. 进程重启后，所有环境变量值按初始化值

点击页面上的update，我们可以看到调用的接口是

点击update的时候实际上调用的是/actuator/env动态的更新参数，参数更新之后，我们可以通过

package com.tuling.cloud.study.user.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import com.tuling.cloud.study.Student;

@RestController
public class OrderController {
  private static final Logger logger = LoggerFactory.getLogger(OrderController.class);
  @Autowired
  private Student student;

  @GetMapping("/msg")
  public String findById() {
    logger.info("================请求用户中心接口==============");
    return student.toString();
  }

}

我们在浏览器上输入，我们可以看到已经实时的更新了参数了

点击页面上的reset按钮，点击 Reset environment，修改的所有值会还原。@ConfigurationProperties绑定的类中的值也还原

底层调用的是/actuator/env的delete请求

这里要特别注意的是，实例暴露的/actuator的全部方法中，如果是post、delete、put请求，在进行更新操作的时候请求头中一定要携带content-type类型，类型必须是Content-Type:application/vnd.spring-boot.actuator.v2+json，这里一定要注意

结论：通过 Environment manager我们可以动态的更新@ConfigurationProperties注解配置的属性

页面上还有一个Refresh context按钮，这个按钮是干啥的，我们来看下

点击的时候，调用的是/actuator/refresh方法是post请求，

具体配置参考博客：https://blog.csdn.net/Anenan/article/details/85134208

@RefreshScope 配置文件自动刷新

1.在类上加@RefreshScope注解。

2.引入配置@Value。

package com.tuling.cloud.study.user.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import com.tuling.cloud.study.Student;

@RestController
@RefreshScope //配置文件自动刷新
public class OrderController {
  private static final Logger logger = LoggerFactory.getLogger(OrderController.class);
  @Autowired
  private Student student;

  @GetMapping("/msg")
  public String findById() {
    logger.info("================请求用户中心接口==============");
    return student.toString();
  }

  @Value("${test.xzh}") //引入配置
  private String xzh;

  @RequestMapping("/test1")
  public String test1(){
      return xzh;
  }

}

这里一定要带上注解@RefreshScope，否则调用/actuator/refresh方法是post请求，也无法动态更新参数

3.配置文件

test.name=fei
test.age=20
test.sex=man
test.xzh=xiangzhenhua
management.security.enabled=false

4.git配置webhooks，也可手动发送POST请求 http://localhost:1003/refresh

默认的值如下

接下来我们动态的来更新test.xzh的值

修改值之后，先调用update方法更新env参数，然后点击refresh context按钮，调用refresh方法更新参数，这样参数就更新了

注意：第一一定要先点击update按钮，在点击refresh confrim按钮