Java後端愛上SpringCloud 第一節:服務註冊和發現 Eureka
阿新 • • 發佈：2019-01-01
Java後端愛上SpringCloud 第一節:服務註冊和發現 Eureka
PS:還是老規矩，一些概念的東西就不說了，貼一些連結，供大家參考。
一些連結
轉：使用spring-boot-admin對spring-boot服務進行監控
轉：Spring Boot Admin 詳解（Spring Boot 2.0，基於 Eureka 的實現）
構建服務註冊中心EurekaServer
新建一個名為的SpringBoot工程。
POM檔案如下：
<?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>
< application.yml如下：
server:
port: 8761
eureka:
instance:
hostname: localhost
client:
#由於該應用為註冊中心,所以設定為false,代表不向註冊中心註冊自己
registerWithEureka: false
#由於註冊中心的職責就是維護服務例項,它並不需要去檢索服務,所以也設定為false
fetchRegistry: false
serviceUrl:
defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/
啟動類如下：
package com.hyn.cloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
@EnableEurekaServer
@SpringBootApplication
public class MySpringCloudApplication {
public static void main(String[] args) {
SpringApplication.run(MySpringCloudApplication.class, args);
}
}
構建服務提供者EurekaClient
在一個springboot工程的pom檔案中引入：
我在之前講的SpringBoot工程中引入的。
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
在application.yml檔案中加入以下：
# tag::configuration-eureka[]
management:
endpoints:
web:
exposure:
include: "*" #<2>
endpoint:
health:
show-details: ALWAYS
# end::configuration-eureka[]
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
坑點注意：如果你的SpringBoot工程有整合SpringSercurity記得一定要在SecurityConfig中加入：
// Actuator start
.requestMatchers(EndpointRequest.toAnyEndpoint()).permitAll()
// Actuator end
整合SpringBoot做視覺化監控
新建一個My-Spring-Admin工程：
POM檔案如下：
<?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>2.1.1.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.hyn</groupId>
<artifactId>my-admin</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>My-Spring-Admin</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-boot-admin.version>2.1.1</spring-boot-admin.version>
<spring-cloud.version>Greenwich.RC1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</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-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</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>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
</project>
application.yml檔案如下：
spring:
application:
name: spring-boot-admin
server:
port: 8788
# tag::configuration-eureka[]
management:
endpoints:
web:
exposure:
include: "*" #<2>
endpoint:
health:
show-details: ALWAYS
# end::configuration-eureka[]
---
spring:
profiles:
active:
- insecure
---
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
啟動類如下：
package com.hyn.cloud;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import de.codecentric.boot.admin.server.config.EnableAdminServer;
@Configuration
@EnableAutoConfiguration
@EnableAdminServer
@EnableEurekaClient
@SpringBootApplication
public class MySpringAdminApplication {
public static void main(String[] args) {
SpringApplication.run(MySpringAdminApplication.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();
}
}
}
Spring Boot Admin工程集成了Security，但是並沒有做一些許可權的驗證，有興趣的童鞋可以自行研究一下。
這裡我們就不登入了，總感覺SpringBootAdmin登入有問題。
直接輸入：http://127.0.0.1:8788/#/applications
在Wallboard
可以看到：
