聊聊如何玩转spring-boot-admin

前言

1、何为spring-boot-admin？

Spring Boot Admin 是一个监控工具，旨在以良好且易于访问的方式可视化 Spring Boot Actuators 提供的信息

快速开始

如何搭建spring-boot-admin-server

1、在服务端项目的POM引入相应的GAV

  <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>${
    
    spring-boot-admin.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

2、新建springboot启动类并加上@EnableAdminServer

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

配置完，访问一下页面

虽然可以访问，但是这样不安全，接下来我们和spring security做个整合

3、整合spring security

a、 在服务端项目的pom引入security GAV

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

b、 在服务端项目的application.yml配置相关用户名和密码

spring:
  security:
    user:
      name: ${
    
    MONITOR_USER:admin}
      password: ${
    
    MONITOR_PWD:admin}

c、 定制security config

@Configuration
@EnableWebSecurity
@RequiredArgsConstructor
public class SecurityMonitorConfig extends WebSecurityConfigurerAdapter {
    
    



    private final AdminServerProperties adminServer;

    private final WebEndpointProperties webEndpointProperties;


    @Override
    protected void configure(HttpSecurity http) throws Exception {
    
    
        SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
        successHandler.setTargetUrlParameter("redirectTo");
        successHandler.setDefaultTargetUrl(this.adminServer.path("/"));


        http.authorizeRequests()
                .requestMatchers(new AntPathRequestMatcher(this.adminServer.path("/assets/**"))).permitAll()
                .requestMatchers(new AntPathRequestMatcher(this.adminServer.path(webEndpointProperties.getBasePath() + "/info")))
                .permitAll()
                .requestMatchers(new AntPathRequestMatcher(adminServer.path(webEndpointProperties.getBasePath() + "/health")))
                .permitAll()
                .requestMatchers(new AntPathRequestMatcher(this.adminServer.path("/login")))
                .permitAll()
                .anyRequest().authenticated()
                .and()
                .formLogin().loginPage(this.adminServer.path("/login")).successHandler(successHandler).and()
                .logout().logoutUrl(this.adminServer.path("/logout")).and()
                .httpBasic().and()
                .csrf().csrfTokenRepository(CookieCsrfTokenRepository.withHttpOnlyFalse())
                .ignoringRequestMatchers(
                        new AntPathRequestMatcher(this.adminServer.path("/instances"), POST.toString()),
        new AntPathRequestMatcher(this.adminServer.path("/instances/*"), DELETE.toString()),
        new AntPathRequestMatcher(this.adminServer.path(webEndpointProperties.getBasePath() + "/**")));

        http.rememberMe((rememberMe) -> rememberMe.key(UUID.randomUUID().toString()).tokenValiditySeconds(1209600));


    }

}

配置完访问一下页面

输入用户名和密码 admin/admin

如果对整合安全认证还有疑问，可以直接参考官网
https://docs.spring-boot-admin.com/current/security.html

4、页面定制

如果我们觉得登录的springboot admin logo个性化不强，我们可以简单定制一下

在application.yml做如下配置

spring:
  boot:
    admin:
      ui:
        title: ${
    
    UI_TITLE:LYB-GEEK Monitor}
        brand: <img src="assets/img/icon-spring-boot-admin.svg"><span>${
    
    spring.boot.admin.ui.title}</span>

配置好访问一下


如果有些导航栏，我们觉得不需要，比如去掉关于我们

spring:
  boot:
    admin:
      ui:
        view-settings:
          - name: "about"
            enabled: false

注： view-settings这个配置需要是2.3.1以上版本才有的属性

配置好访问一下

发现关于我们已经去掉了，以上只是简单定制，更多定制可以参考如下链接
https://docs.spring-boot-admin.com/current/customize_ui.html

5、与注册中心集成

a、 在服务端项目中pom引入eureka-client GAV

  <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

b、 在application.yml文件引入eureka 客户端相关配置

eureka:
  instance:
    instance-id: ${
    
    spring.application.name}:${
    
    spring.cloud.client.ip-address}:${
    
    spring.application.instance_id:${
    
    server.port}}
    prefer-ip-address: ${
    
    PREFER_IP:true}  #是否选择IP注册
    #   ip-address: ${IP_ADDRESS:localhost}   #指定IP地址注册
    lease-renewal-interval-in-seconds: 5  #续约更新时间间隔（默认30秒）,使得eureka及时剔除无效服务
    lease-expiration-duration-in-seconds: 10 #续约到期时间（默认90秒）
    hostname: ${
    
    HOSTNAME:${
    
    spring.application.name}}
  client:
    service-url:
      defaultZone: ${
    
    EUREKA_CLIENT_SERVICEURL_DEFAULTZONE:http://localhost:8761/eureka/}
      #缩短延迟向服务端注册的时间、默认40s
    initial-instance-info-replication-interval-seconds: 10
    #提高Eureka-Client端拉取Server注册信息的频率,默认30s
    registry-fetch-interval-seconds: 5

访问eureka控制面板

服务端的配置暂且说到这边，接下来我们说下客户端集成

如何搭建spring-boot-admin-client

1、在客户端项目的POM配置相关GAV

<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>
            <version>${spring-boot-admin-client.version}</version>
        </dependency>

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

2、客户端暴露actuator相关端点

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

3、配置spring-boot-admin服务端地址

spring:
  boot:
    admin:
      client:
        url: http://localhost:8080

启动观察控制台，会发现有如下信息

原因是因为我们服务端配置了鉴权，因此我们客户端还需做如下配置

spring:
  boot:
    admin:
      client:
        url: http://localhost:8080
        username: admin
        password: admin

配置好，观察控制台，发现没异常信息，此时我们访问服务端监控面板

如图说明客户端搭建成功

4、配置应用信息

默认我们查看服务端监控面板–应用列表详情，会发现

这个信息是空的,我们可以在yml配置形如下内容

info:
  groupId: @project.groupId@
  artifactId: @project.artifactId@
  version: @project.version@
  describe: 这是一个微服务应用

再次访问服务端监控面板

其实这个采的就是actuator/info端点。当然可以像官方介绍的示例，在项目的POM引入springboot插件，并指定goal为build-info

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <executions>
                <execution>
                    <goals>
                        <goal>build-info</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

5、在服务端监控面板集成客户端日志

默认是没集成客户端日志，如图

通过官网

我们知道要配置logging.file.path或者logging.file.name

示例配置

logging:
  file:
    path: ${
    
    LOG_FILE_PATH:/data/logs/cloud-mini-comsumer}

logback-spring相关配置如下

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60 seconds" debug="false">
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <property name="serviceName" value="cloud-mini-comsumer"/>
    <property name="logHome" value="/data/logs/${serviceName}"/>
    <contextName>${serviceName}</contextName>

    <!--输出到控制台-->
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>${CONSOLE_LOG_PATTERN}</pattern>
        </encoder>
    </appender>

    <!--按天生成日志-->
    <appender name="logFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <Prudent>true</Prudent>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <FileNamePattern>
                ${logHome}/%d{yyyy-MM-dd}/%d{yyyy-MM-dd}.log
            </FileNamePattern>
            <maxHistory>30</maxHistory>
        </rollingPolicy>
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %d{yyyy-MM-dd HH:mm:ss} -%msg%n
            </Pattern>
        </layout>
    </appender>

    <root level="info">
        <appender-ref ref="console"/>
        <appender-ref ref="logFile"/>
    </root>

</configuration>

我们配置后，出现日志文件按钮，点击后出现

那就很诡异，明明按官网配置了，后面排查发现，其他服务可以出现日志，他们配置日志目录底下，都会生成一个spring.log日志，那意味着只要能生成spring.log即可。于是我们调整一下logback-spring，将

 <include resource="org/springframework/boot/logging/logback/defaults.xml"/>

调整为

 <include resource="org/springframework/boot/logging/logback/base.xml" />

然后重新访问服务端监控面板

发现有日志出来了。那为毛加了这个base.xml就有用，那是因为这个日志采集的端点是actuator/logfile。因为本文不是讲解源码，我就把相关核心源码，贴在下面，感兴趣的朋友可以根据下面提供的源码，进行debug调试

核心源码

@WebEndpoint(id = "logfile")
public class LogFileWebEndpoint {
    
    

	private static final Log logger = LogFactory.getLog(LogFileWebEndpoint.class);

	private File externalFile;

	private final LogFile logFile;

	public LogFileWebEndpoint(LogFile logFile, File externalFile) {
    
    
		this.externalFile = externalFile;
		this.logFile = logFile;
	}

	@ReadOperation(produces = "text/plain; charset=UTF-8")
	public Resource logFile() {
    
    
		Resource logFileResource = getLogFileResource();
		if (logFileResource == null || !logFileResource.isReadable()) {
    
    
			return null;
		}
		return logFileResource;
	}

	private Resource getLogFileResource() {
    
    
		if (this.externalFile != null) {
    
    
			return new FileSystemResource(this.externalFile);
		}
		if (this.logFile == null) {
    
    
			logger.debug("Missing 'logging.file.name' or 'logging.file.path' properties");
			return null;
		}
		return new FileSystemResource(this.logFile.toString());
	}

}

public class LogFile {
    
    

	/**
	 * The name of the Spring property that contains the name of the log file. Names can
	 * be an exact location or relative to the current directory.
	 * @deprecated since 2.2.0 in favor of {@link #FILE_NAME_PROPERTY}
	 */
	@Deprecated
	public static final String FILE_PROPERTY = "logging.file";

	/**
	 * The name of the Spring property that contains the directory where log files are
	 * written.
	 * @deprecated since 2.2.0 in favor of {@link #FILE_PATH_PROPERTY}
	 */
	@Deprecated
	public static final String PATH_PROPERTY = "logging.path";

	/**
	 * The name of the Spring property that contains the name of the log file. Names can
	 * be an exact location or relative to the current directory.
	 * @since 2.2.0
	 */
	public static final String FILE_NAME_PROPERTY = "logging.file.name";

	/**
	 * The name of the Spring property that contains the directory where log files are
	 * written.
	 * @since 2.2.0
	 */
	public static final String FILE_PATH_PROPERTY = "logging.file.path";

	private final String file;

	private final String path;

	/**
	 * Create a new {@link LogFile} instance.
	 * @param file a reference to the file to write
	 */
	LogFile(String file) {
    
    
		this(file, null);
	}

	/**
	 * Create a new {@link LogFile} instance.
	 * @param file a reference to the file to write
	 * @param path a reference to the logging path to use if {@code file} is not specified
	 */
	LogFile(String file, String path) {
    
    
		Assert.isTrue(StringUtils.hasLength(file) || StringUtils.hasLength(path), "File or Path must not be empty");
		this.file = file;
		this.path = path;
	}

	/**
	 * Apply log file details to {@code LOG_PATH} and {@code LOG_FILE} system properties.
	 */
	public void applyToSystemProperties() {
    
    
		applyTo(System.getProperties());
	}

	/**
	 * Apply log file details to {@code LOG_PATH} and {@code LOG_FILE} map entries.
	 * @param properties the properties to apply to
	 */
	public void applyTo(Properties properties) {
    
    
		put(properties, LoggingSystemProperties.LOG_PATH, this.path);
		put(properties, LoggingSystemProperties.LOG_FILE, toString());
	}

	private void put(Properties properties, String key, String value) {
    
    
		if (StringUtils.hasLength(value)) {
    
    
			properties.put(key, value);
		}
	}

	@Override
	public String toString() {
    
    
		if (StringUtils.hasLength(this.file)) {
    
    
			return this.file;
		}
		return new File(this.path, "spring.log").getPath();
	}

加了那个logback-base可以的原因是，点开base.xml

6、客户端与注册中心集成

说实话spring-boot-admin我看过的，基本上都是用在微服务场景比较多，因此后面的内容，我以集成注册中心为核心来讲解示例，通过url配置服务端监控地址就不再论述。

a、 在客户端项目的pom引入eureka-client GAV

 <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>

b、 配置eureka 客户端相关信息

eureka:
  instance:
    instance-id: ${
    
    spring.application.name}:${
    
    spring.cloud.client.ip-address}:${
    
    spring.application.instance_id:${
    
    random.uuid}}
    prefer-ip-address: ${
    
    PREFER_IP:false}  #是否选择IP注册
 #   ip-address: ${IP_ADDRESS:localhost}   #指定IP地址注册
    lease-renewal-interval-in-seconds: 5  #续约更新时间间隔（默认30秒）,使得eureka及时剔除无效服务
    lease-expiration-duration-in-seconds: 10 #续约到期时间（默认90秒）
    hostname: ${
    
    HOSTNAME:${
    
    spring.application.name}}
    metadata-map:
      ipAddress: ${
    
    spring.cloud.client.ip-address}
      management:
        address: ${
    
    spring.cloud.client.ip-address}
  client:
    service-url:
      defaultZone: ${
    
    EUREKA_CLIENT_SERVICEURL_DEFAULTZONE:http://localhost:8761/eureka/}
      #缩短延迟向服务端注册的时间、默认40s
    initial-instance-info-replication-interval-seconds: 10
    #提高Eureka-Client端拉取Server注册信息的频率,默认30s
    registry-fetch-interval-seconds: 5

注： 客户端和服务端集成的eureka地址必须得同一个

客户端和服务端同时配置好注册中心后，我们访问一下服务端监控面板

和用url配置服务端地址的效果一样，到这边大体就差不多了。但是实际使用，没那么简单。我们列举几种场景

场景一：客户端的默认端点不是actuator

因为公司有时候会有等保要求，正常是不能直接暴露actuator端点，所以我们客户端，可能会将端点路径改个名字，比如改成如下

management:
  endpoints:
    web:
      base-path: ${
    
    MONINTOR_BASE_PATH:/lyb-geek}
      exposure:
        include: "*"

此时通过服务端监控面板访问

会发现爆红了，点击爆红的面板进去

健康检测404，我们可以通过配置注册中心的元数据，示例如下

eureka:
  instance:
    metadata-map:
      management:
        context-path: ${
    
    management.endpoints.web.base-path:/actuator}

此时我们再访问服务端监控面板

发现可以正常访问了。

场景二：客户端的actuator需要认证才能访问

当我们没有通过认证，直接访问服务端监控面板时

会出现401，未授权访问，此时我们在注册中心配置形如下内容

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

访问服务端监控面板

已经可以正常访问

场景三：客户端通过hostName注册到注册中心，服务端监控面板只显示一个实例

这个场景出现在容器化部署，因为此时hostName和port都一样，因此这个客户端就被当成是同一个。此时通过如下配置

eureka:
  instance:
    metadata-map:
      management:
        address: ${
    
    spring.cloud.client.ip-address}

通过配置management.address指定ip

注： 想知道spring-boot-admin可以支持哪些注册中心元数据，可以查看官网
https://docs.spring-boot-admin.com/current/server.html

也看可以查看源码

de.codecentric.boot.admin.server.cloud.discovery.DefaultServiceInstanceConverter

如何为spring-boot-admin集成告警

以集成邮件告警为例，在服务端的POM引入邮件发送的GAV

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

在服务端的application.yml配置邮件发送配置

spring:
  mail:
    host: ${
    
    MAIL_HOST:邮箱服务器地址}
    port:
    username: ${
    
    MAIL_USERNAME:邮箱服务器用户名}
    password: ${
    
    MAIL_PWD:邮箱服务器密码}
    protocol: ${
    
    MAIL_PROTOCOL:smtp}
    default-encoding: UTF-8
    properties:
      mail.smtp.auth: true
      mail.smtp.starttls.enable: true
      mail.smtp.starttls.required: true
      mail.smtp.socketFactory.port: ${
    
    MAIL_SMTP_SOCKETFACTORY_PORT:465}
      mail.smtp.socketFactory.class: javax.net.ssl.SSLSocketFactory
      mail.smtp.socketFactory.fallback: false
      mail.smtp.ssl.protocols: ${
    
    MAIL_SMTP_SSL_PROTOCOLS:TLSv1}

配置邮件通知接收人和发送人

spring:
  boot:
    admin:
      notify:
        mail:
          to: ${
    
    NOTIFY_MAIL_TO:邮箱接收人，多个用,隔开}
          from: ${
    
    NOTIFY_MAIL_FROM:邮箱发送人}

当客户端出现异常时，会收到形如下告警

更多告警的玩法可以参考官网
https://docs.spring-boot-admin.com/current/server-notifications.html

总结

spring-boot-admin其实核心就做了一件事，就是把Spring Boot Actuators 可视化。本文就不提供demo了，因为官网文档写得很详细，大部分内容都可以从官网找到https://docs.spring-boot-admin.com/current/。除了那个日志稍微有点坑