105 Springboot2.0 详解

https://www.jianshu.com/p/7c2e0d9c365c

一，什么是Spring boot Admin ?
Spring Boot Admin 是个开源社区项目，用于管理和监控Spring boot 应用程序。用用程序作为Spring boot Admin client 向为 Spring boot Admin Server 注册（通过HTTP）或者使用Spring cloud注册中心（例如Eureka,Consul）发现。。ui是Vue.js 应用程序，展示spring boot Admin client的Acutor 端点上的一些监控。服务采用Spring WebFlux + Netty的方式。Spring boot Admin为注册中心的应用程序提供一下功能。

显示健康状况
显示详细信息，例如
JVM和内存指标
mincrometer.io 指标
数据源指标
缓存指标
显示构建信息编号
关注并下载日志文件
查看jvm system- 和environment -properties
查看spring Boot 配置属性
支持springcloud 的postable /env- 和/ refresh-endpoint
轻松的日志级管理
与 jmx-beans 交互
查看线程转储
查看http-endpoints
查看计划任务
查看和删除活动回话（使用 spring-session）
查看 Flyway/ liquibase
下载 heapdump
状态变更通知（通过电子邮件，Slack, Hipchat,.....）
状态更改的事件日志（非持久性）

二，入门
1，创建 Spring boot Admin Server
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 https://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>2.2.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
<groupId>com.taotao</groupId>
    <artifactId>spring-boot-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-boot-server</name>
    <description>Demo project for Spring Boot</description>
<properties>
        <java.version>1.8</java.version>
        <spring-boot-admin.version>2.2.1</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>
            <exclusions>
                    <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </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:
  application:
    name: admin-server
server:
  port: 8769

启动类 AdminServerApplication
启动类加上 @EnableServerApplication,开启AdminServer的功能：

package com.taotao.springbootserver;

import de.codecentric.boot.admin.server.config.EnableAdminServer;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@EnableAdminServer
@SpringBootApplication
public class SpringBootServerApplication {

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

}

2,创建 Spring Boot Admin Client
加入：

  <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</artifactId>
        </dependency>

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 https://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>2.2.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.taotao</groupId>
    <artifactId>spring-boot-admin-client</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-boot-admin-client</name>
    <description>Demo project for Spring Boot</description>
<properties>
        <java.version>1.8</java.version>
        <spring-boot-admin.version>2.2.1</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>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </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，大多数的acutor的端口都不会通过http公开， "*"代表搜友的这些端点，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:8769
server:
  port: 8768

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

启动类： SpringBootAdminClientApplication

package com.taotao.springbootadminclient;

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

@SpringBootApplication
public class SpringBootAdminClientApplication {

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

}

启动2个工程，在浏览器上输入localhost:8769,浏览器显示的界面如下：

image

查看 wallboard:

image

点击wallboard，可以查看admin-client具体的信息，比如内存状态信息：

image

查看应用程序运行状况，信息和详细

image

还有很多监控信息，多点点就知道；

三，集成 eureka-server 注册中心
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 https://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>2.2.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.taotao</groupId>
    <artifactId>eureka-server</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>eureka-server</name>
    <description>Demo project for Spring Boot</description>

<properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
    <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        <dependency>
            <groupId>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-server</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
    <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
    </exclusions>
</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

server:
  port: 8889

eureka:
  instance:
    hostname: localhost
client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
spring:
  application:
    name: sc-eureka-server
management:
  endpoints:
    web:
      exposure:
        include:  "*"
  endpoint:
    health:
      show-details: always

启动类： EurekaServerApplication

package com.taotao.eurekaserver;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

@EnableEurekaServer
@SpringBootApplication
public class EurekaServerApplication {

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

}

创建 sc-admin-server
这是一个Spring Boot Admin Server 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-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>


    </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-server
server:
  port: 8889
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： ScAdminServerApplication

package com.taotao.scadminserver;

import de.codecentric.boot.admin.server.config.EnableAdminServer;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

@EnableAdminServer
@EnableDiscoveryClient
@SpringBootApplication
public class ScAdminServerApplication {

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

}

创建 sc-admin-client
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 https://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>2.2.4.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
<groupId>com.taotao</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>2.2.1</spring-boot-admin.version>
        <spring-cloud.version>Hoxton.SR1</spring-cloud.version>
    </properties>

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>
        <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>de.codecentric</groupId>
            <artifactId>spring-boot-admin-starter-client</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>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </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: sc-admin-client
eureka:
  instance:
    leaseRenewalIntervalInSeconds: 10
    health-check-url-path: /actuator/health

  client:
    registryFetchIntervalSeconds: 5
    service-url:
      defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8889}/eureka/
management:
  endpoints:
    web:
      exposure:
        include: "*"
  endpoint:
    health:
      show-details: ALWAYS
server:
  port: 8762

启动类： ScAdminClientApplication

package com.taotao.scadminclient;

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


@EnableDiscoveryClient
@SpringBootApplication
public class ScAdminClientApplication {

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

}

启动三个工程访问localhost:8769，出现以下界面：

image

admin 会自己拉取Eueka 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。这样的变化对环境变化很友好，不用改了admin-server后去改所有app的配置

四，集成Spring Secyrity
web应用程序中的身份验证和授权方法有多种方法，因此springbootAdmin 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任认证。
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>

在sc-admin-server中的配置文件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}

@EnableWebSecurity注解以及 webSecurityConfigurerAdapter 一起配合提供了基于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之前都要进行验证的功能，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
    }
}

重新访问 http://localhost:8769/ 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：

image

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