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第 14 章 Spring Cloud

目录

14.1. Spring Cloud Config
14.1.1. Git 仓库
14.1.2. Server
14.1.2.1. Maven
14.1.2.2. Application
14.1.2.3. application.properties
14.1.2.4. 测试服务器
14.1.2.5. Maven pom.xml (Camden.SR5)
14.1.3. Client
14.1.3.1. Maven pom.xml
14.1.3.2. Application
14.1.3.3. bootstrap.properties
14.1.3.4. 测试 client
14.1.3.5. Maven pom.xml (Camden.SR5)
14.1.4. Config server 用户认证
14.1.4.1. Server 配置
14.1.4.1.1. application.properties
14.1.4.1.2. Maven
14.1.4.1.3. 测试是否生效
14.1.4.2. Client 配置
14.1.5. 加密敏感数据
14.2. Spring Cloud Netflix
14.2.1. Eureka Server
14.2.1.1. Maven
14.2.1.2. Application
14.2.1.3. application.properties
14.2.1.4. 检查注册服务器
14.2.1.5. 为 Eureka Server 增加用户认证
14.2.1.5.1. Maven
14.2.1.5.2. application.properties
14.2.1.5.3. Eureka Client
14.2.1.5.4. Feign Client
14.2.2. Eureka Client
14.2.2.1. Maven
14.2.2.2. Application
14.2.2.3. RestController
14.2.2.4. application.properties
14.2.2.5. 测试
14.2.3. Feign client
14.2.3.1. Maven
14.2.3.2. Application
14.2.3.3. interface
14.2.3.4. application.properties
14.2.3.5. 测试
14.2.3.6. fallback
14.2.4. Zuul
14.2.4.1. Maven
14.2.4.2. EnableZuulProxy
14.2.4.3. application.yml
14.2.4.4. 负载均衡配置
14.3. FAQ
14.3.1. Feign请求超时
14.3.2. Eureka Client (Dalston.SR1)
14.3.2.1. Maven
14.3.2.2. Application
14.3.2.3. RestController
14.3.2.4. application.properties
14.3.2.5. 测试
14.3.3. Feign 启动出错 PathVariable annotation was empty on param 0.

14.1. Spring Cloud Config

14.1.1. Git 仓库

克隆仓库

git clone https://github.com/netkiller/config.git
		

创建配置文件 server-development.properties

vim server-development.properties

test.a=KKOOKK
message=Hello world
		

提交配置文件

git commit -a
git push
		

配置文件格式

		
/{application}/{profile}[/{label}]
/{application}-{profile}.yml
/{label}/{application}-{profile}.yml
/{application}-{profile}.properties
/{label}/{application}-{profile}.properties		
		
		

14.1.2. Server

14.1.2.1. Maven

			
<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>cn.netkiller</groupId>
	<artifactId>config</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>config</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.6.RELEASE</version>
		<relativePath />
	</parent>
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-config</artifactId>
				<version>1.3.1.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-config-server</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>


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

			
			

14.1.2.2. Application

Application

			
package cn.netkiller.cloud;

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

@Configuration
@EnableAutoConfiguration
@EnableDiscoveryClient
@EnableConfigServer
@SpringBootApplication
public class Application {

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

}
			
			

14.1.2.3. application.properties

server.port=8888
spring.cloud.config.server.git.uri=https://github.com/netkiller/config.git
			

14.1.2.4. 测试服务器

neo@netkiller $ curl http://localhost:8888/server-development.json
{"message":"Hello world","test":{"a":"KKOOKK"}}
			

14.1.2.5. Maven pom.xml (Camden.SR5)

请使用最新版本 1.3.1, 下面的 maven 是早期 Camden.SR5 版本的配置

			
<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>netkiller.cn</groupId>
	<artifactId>cloud</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>Neo</name>
	<description>http://www.netkiller.cn</description>
	<packaging>jar</packaging>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.3.RELEASE</version>
		<relativePath />
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-config-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>Camden.SR5</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>
			
			

14.1.3. Client

14.1.3.1. Maven pom.xml

			
<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>netkiller.cn</groupId>
	<artifactId>cloud</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.2.RELEASE</version>
		<relativePath />
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencyManagement>
	    <dependencies>
	        <dependency>
	            <groupId>org.springframework.cloud</groupId>
	            <artifactId>spring-cloud-config</artifactId>
	            <version>1.3.1.RELEASE</version>
	            <type>pom</type>
	            <scope>import</scope>
	        </dependency>
	    </dependencies>
	</dependencyManagement>

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

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

</project>			
			
			

14.1.3.2. Application

			
package cn.netkiller.cloud.client;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
public class Application {

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

@RefreshScope
@RestController
class MessageRestController {

	@Value("${message:Hello default}")
	private String message;

	@RequestMapping("/message")
	String getMessage() {
		return this.message;
	}
}			
			
			

14.1.3.3. bootstrap.properties

			
spring.application.name=server-development
spring.cloud.config.uri=http://localhost:8888
management.security.enabled=false			
			
			

14.1.3.4. 测试 client

neo@netkiller $ curl http://localhost:8080/message.json             
Hello world
			

14.1.3.5. Maven pom.xml (Camden.SR5)

Camden.SR5 为早期版本,尽可以使用新版

			
<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>netkiller.cn</groupId>
	<artifactId>cloud</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.2.RELEASE</version>
		<relativePath />
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-starter-config</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>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>Camden.SR5</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>			
			
			

14.1.4. Config server 用户认证

14.1.4.1. Server 配置

14.1.4.1.1. application.properties
server.port=8888
spring.cloud.config.server.git.uri=ssh://localhost/config-repo
spring.cloud.config.server.git.clone-on-start=true
security.user.name=cfg
security.user.password=s3cr3t
				
14.1.4.1.2. Maven
				
<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>cn.netkiller</groupId>
	<artifactId>config</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>config</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.7.RELEASE</version>
		<relativePath />
	</parent>
	<dependencyManagement>
		<dependencies>
			<dependency>
				<groupId>org.springframework.cloud</groupId>
				<artifactId>spring-cloud-config</artifactId>
				<version>1.3.1.RELEASE</version>
				<type>pom</type>
				<scope>import</scope>
			</dependency>
		</dependencies>
	</dependencyManagement>
	<dependencies>
		<dependency>
			<groupId>org.springframework.cloud</groupId>
			<artifactId>spring-cloud-config-server</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-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>
				
				
				
14.1.4.1.3. 测试是否生效
				
neo@MacBook-Pro ~/deployment % curl http://cfg:s3cr3t@localhost:8888/neo-development.json
{"message":"Hello world","test":{"name":"neo"}}		
				
				

14.1.4.2. Client 配置

bootstrap.properties:

spring.application.name=project
spring.profiles.active=development
spring.cloud.config.uri=http://localhost:8888
spring.cloud.config.username=cfg
spring.cloud.config.password=s3cr3t
			

14.1.5. 加密敏感数据

Config server 创建证书

		
keytool -genkeypair -alias config-server-key \
       -keyalg RSA -keysize 4096 -sigalg SHA512withRSA \
       -dname 'CN=Config Server,OU=Spring Cloud,O=Netkiller' \
       -keypass s3cr3t -keystore config-server.jks \
       -storepass passw0rd		
		
		

application.properties 中配置证书

		
# spring.cloud.config.server.encrypt.enabled=true
encrypt.key-store.location=classpath:/config-server.jks
encrypt.key-store.alias=config-server-key
encrypt.key-store.secret=s3cr3t
encrypt.key-store.password=passw0rd
		
		

测试加密

		
curl -X POST --data-urlencode mypassword http://localhost:8888/encrypt
		
		
		
$ PASSWORD=$(curl -X POST --data-urlencode passw0rd http://cfg:s3cr3t@localhost:8888/encrypt)
$ echo "user.password=$PASSWORD" >> api-interface-development.properties
$ git commit -am 'Added encrypted password'

# 刷新配置
$ curl -X POST http://cfg:s3cr3t@localhost:8888/refresh