SpringCloud2.0入门4-springboot-admin监控

前言

上一节为springboot项目添加springboot-admin监控 学习了基于springboot1.5自己注册到admin的方法。接下来学习结合Eureka使用以及2.0的改变。

1.5spring-boot-admin集成eureka

我们继续上一节的项目修改,admin-server依赖修改如下

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<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.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</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>
</dependencies>
</dependencyManagement>

修改启动类,添加

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@EnableDiscoveryClient
@EnableAdminServer

修改配置文件application.properties

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server.port=8081
spring.application.name=admin-server
eureka.client.serviceUrl.defaultZone=${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/
management.security.enabled=false

注意,这里的eureka server要提前启动。具体细节,参见SpringCloud入门1-服务注册与发现(Eureka)

到这里就结束,可以直接启动。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。

spring-boot-admin2.0的巨变

以为2.0比1.5区别不大,也确实不很大。关于client主动注册的部分没有变化。

这里,重新学习一遍,并添加上安全登录功能。

新建一个springboot项目

项目地址:

https://github.com/Ryan-Miao/spring-cloud-demo/tree/master/admin-server

添加spring-boot-admin-server, 最终pom依赖如下

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<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-boot-admin.version>2.0.0</spring-boot-admin.version>
<spring-cloud.version>Finchley.RC2</spring-cloud.version>
</properties>

<dependencies>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-starter-server</artifactId>
</dependency>
<!--还没有发布-->
<!--<dependency>-->
<!--<groupId>de.codecentric</groupId>-->
<!--<artifactId>spring-boot-admin-server-cloud</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-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
</dependencies>

<dependencyManagement>
<dependencies>
<dependency>
<groupId>de.codecentric</groupId>
<artifactId>spring-boot-admin-dependencies</artifactId>
<version>${spring-boot-admin.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.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>
<executions>
<execution>
<goals>
<goal>build-info</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

<repositories>
<repository>
<id>central</id>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<name>aliyun</name>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>

注意到里面添加spring cloud eureka的依赖,我们也把admin给注册到eureka。

这次的配置文件比较复杂

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spring:
application:
name: admin-server
profiles:
active:
- secure


# tag::configuration-eureka[]
eureka: #<1>
instance:
leaseRenewalIntervalInSeconds: 10
health-check-url-path: /actuator/health #2.0后actuator的地址发生了变化
client:
registryFetchIntervalSeconds: 5
serviceUrl:
defaultZone: ${EUREKA_SERVICE_URL:http://localhost:8761}/eureka/

# 2.0开始,actuator默认不开放,所以要设置为开放
management:
endpoints:
web:
exposure:
include: "*" #<2>
endpoint:
health:
show-details: ALWAYS
server:
port: 8081
# end::configuration-eureka[]

---
spring:
profiles: insecure

---
# admin登录的用户名和密码
spring:
profiles: secure
security:
user:
name: "user"
password: "password"

# 注册给eureka的时候告诉eureka自己的密码
eureka:
instance:
metadata-map:
"user.name": ${spring.security.user.name} #These two are needed so that the server
"user.password": ${spring.security.user.password} #can access the protected client endpoints

首先,我们同时支持两种安全配置,一种没有安全认证,一种有。注意到前面的依赖pom里有security的依赖。针对security方案,需要配置用户名和密码。

其次,配置了eureka client相关参数,把自己注册到eureka里。

然后,关于actuator的端点接口,设置为全部开放。

最后,设置我们的用户名和密码,并把用户名和密码放到eureka里,方便识别。

配置security的安全过滤

最终的启动类如下

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@EnableDiscoveryClient
@EnableAdminServer
@SpringBootApplication
public class AdminServerApplication {

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

@Profile("insecure")
@Configuration
public static class SecurityPermitAllConfig extends WebSecurityConfigurerAdapter {

@Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests().anyRequest().permitAll()//
.and().csrf().disable();
}
}

@Profile("secure")
@Configuration
public static 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");

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();
// @formatter:on
}
}
}

和之前没啥不同,唯一的区别是添加了安全认证相关的,即采用secure模式的时候必须输入用户名和密码。

启动

我们启动并选择激活配置环境secure

访问localhost:8081

详细页

界面确实比1.5好很多啊。

新建一个app来注册

依旧采用手动注册的方式,新建一个springboot项目,项目地址

https://github.com/Ryan-Miao/spring-cloud-demo/tree/master/provider-demo

首先,pom依赖要有eureka

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<?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>

<groupId>com.test</groupId>
<artifactId>provider-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>provider-demo</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-cloud.version>Finchley.RC2</spring-cloud.version>
<spring-boot-admin.version>2.0.0</spring-boot-admin.version>
</properties>

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

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</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>
<executions>
<execution>
<goals>
<goal>build-info</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

<repositories>
<repository>
<id>central</id>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<name>aliyun</name>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>


</project>

注意,配置了eureka,用来注册。

依赖springfox-swagger2用来展示API。

spring-boot-admin-starter-client才是主动注册的核心库,用来发送注册申请。

需要再次强调了是build

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<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>

这里是为了生成版本信息,提供给spring-boot-admin展示。

provider-demo的配置文件

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

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

server:
port: 8082

spring:
application:
name: provider-demo
boot:
admin:
client:
url: "http://localhost:8081"
password: password
username: user
instance:
prefer-ip: true

eureka的配置和admin-server相同,毕竟都是eureka的client嘛。不同的是这里没有开启spting security,所以不添加用户名和密码信息到meta-data里。

actuator同样需要暴露全部。

关于spring-boot-admin-client的注册配置里多了username和password,这个不是自己的,而是admin-server设置的,即前文的里的。

启动后就可以看到前面的详细信息了。

巨变在这里

在1.5版本里,我们只要加上eureka注册,就可以admin-server自动发现所有的app并自己注册监控了。但这里居然行不通了。我调试了几个小时,把依赖包翻来覆去研究了好多遍—-就是不行!!!

无奈,只好去github把spring-boot-admin的源码下载下来,找到注册的代码开始追踪。我发现,根本没有提供任何和eureka注册中心相关的代码。看到了spring-boot-admin-server-cloud, 进去看了源码,这里有关于注册中心的监听代码,也就是admin自动发现app的密码所在。那我把这个加入dependency不就好了吗,太年轻。加上后发现找不到版本。我说不应该啊,我有导入dependencyManagement的pom啊。手动指定版本也不行。最后无奈的发现,原来根本没有发布!!!

⚠️Note: Since Spring Cloud Finchley is not released yet, this version doesn’t include Spring Cloud Discovery support

所以,手动注册吧,骚年。不然你再等等。

结语

通过这一下午的尝试,追踪源码,我发现自己确实挺乐在其中的。然而,这花费了大量的时间和精力。所以,我花费了更多的时间一定要把这次经历记录下来,也就是本文了。想说的是,最新的版本果然是坑巨多,慎入!!!如果是作为生产环境的选型,必须跳过这样的版本。当然,如果是自己个人研究,看新的没错。

那么,我到底应不应该学习2.0呢,毕竟1.5也没学完呢。

学吧,按2.0的学习,工作中还是用1.5. 嗯,就这样吧。

Miao语

没有解决不了的bug,只要你用心研究,都可以解决。

参考

Ryan Miao wechat
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