8.2.1. Eureka Server
8.2.1.1. 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.spring.cloud</groupId> <artifactId>netflix.eureka.server</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eureka.server</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </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-netflix</artifactId> <version>1.3.5.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka-server</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <configuration> <skip>true</skip> </configuration> </plugin> </plugins> </build> </project>
8.2.1.2. Application
package cn.netkiller.spring.cloud.netflix.eureka.server; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @SpringBootApplication @EnableEurekaServer public class Application { public static void main(String[] args) { System.out.println("Hello World!"); // new SpringApplicationBuilder(Application.class).web(true).run(args); SpringApplication.run(Application.class, args); } }
8.2.1.3. application.properties
server.port=8761 eureka.client.register-with-eureka=false eureka.client.fetch-registry=false eureka.client.serviceUrl.defaultZone=http://localhost:${server.port}/eureka/ logging.level.com.netflix.eureka=OFF logging.level.com.netflix.discovery=OFF
8.2.1.4. 检查注册服务器
http://localhost:8761
8.2.1.5. 为 Eureka Server 增加用户认证
8.2.1.5.1. Maven
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency>
8.2.1.5.2. application.properties
security.user.name=eureka security.user.password=s3cr3t
8.2.1.5.3. Eureka Client
spring.application.name=restful-api-service eureka.client.serviceUrl.defaultZone=http://eureka:s3cr3t@localhost:8761/eureka/
8.2.1.5.4. Feign Client
eureka.client.serviceUrl.defaultZone=http://eureka:s3cr3t@localhost:8761/eureka/
8.2.2. Eureka Client
8.2.2.1. 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.spring.cloud</groupId> <artifactId>eureka.client</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>eureka.client</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </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-netflix</artifactId> <version>1.3.5.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.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <configuration> <skip>true</skip> </configuration> </plugin> </plugins> </build> </project>
8.2.2.2. Application
package cn.netkiller.spring.cloud.eureka.client; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.context.annotation.Configuration; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @Configuration @EnableAutoConfiguration @EnableEurekaClient @RestController public class Application { @RequestMapping("/") public String home() { return "Hello World"; } public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
8.2.2.3. RestController
package cn.netkiller.spring.cloud.eureka.client; import java.util.List; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cloud.client.ServiceInstance; import org.springframework.cloud.client.discovery.DiscoveryClient; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; @RestController public class TestRestController { private static final Logger logger = LoggerFactory.getLogger(TestRestController.class); @RequestMapping("/") public String version() { logger.info("Hello!!!"); return "Version: v1.0.0"; } @RequestMapping(value = "/add", method = RequestMethod.GET) public Integer add(@RequestParam Integer a, @RequestParam Integer b) { Integer r = a + b; return r; } @RequestMapping("/greeting") public String greeting() { return "GREETING"; } }
8.2.2.4. application.properties
spring.application.name=test-service server.port=8080 eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/
8.2.2.5. 测试
首先确认客户端已经注册到 http://localhost:8761/
你可以启动很多 Eureka 客户端,相同的 spring.application.name 会归为一组,为用户提供负载均衡。
neo@MacBook-Pro ~ % curl http://localhost:8080/ Hello World
add 接口测试
curl http://localhost:8080/add.json?a=5&b=3 8
8.2.3. Feign client
8.2.3.1. 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.spring.cloud.netflix</groupId> <artifactId>feign.client</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>feign.client</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.3.RELEASE</version> <relativePath /> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-eureka</artifactId> <version>1.3.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-feign</artifactId> <version>1.3.1.RELEASE</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-surefire-plugin</artifactId> <configuration> <skip>true</skip> </configuration> </plugin> </plugins> </build> </project>
8.2.3.2. Application
package cn.netkiller.spring.cloud.netflix.feign.client; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.EnableEurekaClient; import org.springframework.cloud.netflix.feign.EnableFeignClients; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @SpringBootApplication @EnableEurekaClient @EnableFeignClients @RestController public class Application { @Autowired private GreetingClient greetingClient; @RequestMapping("/get-greeting") public String greeting() { return greetingClient.greeting(); } public static void main(String[] args) { SpringApplication.run(Application.class, args); System.out.println("Hello World!"); } }
8.2.3.3. interface
package cn.netkiller.spring.cloud.netflix.feign.client; import org.springframework.cloud.netflix.feign.FeignClient; import org.springframework.web.bind.annotation.RequestMapping; @FeignClient("test-service") public interface GreetingClient { @RequestMapping("/greeting") String greeting(); }
@FeignClient("test-service") 是 Eureka Client application.properties 中的 spring.application.name 配置项
@RequestMapping("/greeting") 是 Eureka Client RestController 中的 @RequestMapping
8.2.3.4. application.properties
spring.application.name=spring-cloud-eureka-feign-client server.port=8088 #eureka.client.register-with-eureka=false #eureka.client.fetch-registry=false eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/ feign.compression.response.enabled=true feign.compression.request.enabled=true feign.compression.request.mime-types=text/xml,application/xml,application/json feign.compression.request.min-request-size=2048
8.2.3.5. 测试
$ curl -s http://localhost:8088/get-greeting.json GREETING
8.2.3.6. fallback
@FeignClient(value = "restful-api-service", fallback = UserServiceFeignClientFallback.class) public interface UserServiceFeignClient { @RequestMapping(value = "/api/user/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE) User getUser(@PathVariable("id") int id); @RequestMapping(value = "/api/user/search/findByName?name={name}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE) User findUserByName(@PathVariable("name") String name); @RequestMapping(value = "/api/user/search/findByAddress?address={address}", method = RequestMethod.GET) String findUserByAddress(@PathVariable("address") String address); }
@Component public class UserServiceFeignClientFallback implements UserServiceFeignClient { @Override public User getUser(int id) { return new User("getUser.Fallback", "feignClient return"); } @Override public User findUserByName(String name) { return new User("findUserByName.Fallback", "feignClient return"); } @Override public String findUserByAddress(String address) { return "fallback"; } }
8.2.4. Zuul
8.2.4.1. 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>zuul</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>zuul</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.6.RELEASE</version> <relativePath /> <!-- lookup parent from repository --> </parent> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Dalston.SR2</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-zuul</artifactId> </dependency> </dependencies> </project>
8.2.4.2. EnableZuulProxy
package cn.netkiller.zuul; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.zuul.EnableZuulProxy; @SpringBootApplication @EnableZuulProxy public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
8.2.4.3. application.yml
server: port: 8765 logging: level: ROOT: INFO org.springframework.web: DEBUG zuul: routes: restful: path: /restful/** url: http://api:password@api.netkiller.com:8080/restful
8.2.4.4. 负载均衡配置
zuul: routes: httpbin: path: /** serviceId: httpslb httpslb: ribbon: listOfServers: api1.netkiller.org, api2.netkiller.cn
原文出处:Netkiller 系列 手札
本文作者:陈景峯
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时间: 2024-09-21 08:30:55