# 服务注册与发现

// Eureka服务端配置
@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
public static void main(String[] args) {
SpringApplication.run(EurekaServerApplication.class, args);
}
}

// 服务提供者配置
@SpringBootApplication
@EnableEurekaClient
@RestController
public class ServiceProviderApplication {
@GetMapping(“/hello”)
public String hello() {
return “Hello from service provider!”;
}

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

// 服务消费者配置
@SpringBootApplication
@EnableEurekaClient
@RestController
public class ServiceConsumerApplication {
@Autowired
private RestTemplate restTemplate;

@GetMapping(“/call”)
public String callService() {
return restTemplate.getForObject(“http://service-provider/hello”, String.class);
}

@Bean
@LoadBalanced
public RestTemplate restTemplate() {
return new RestTemplate();
}

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

# Spring Cloud Gateway配置

@SpringBootApplication
@EnableEurekaClient
public class GatewayApplication {
public static void main(String[] args) {
SpringApplication.run(GatewayApplication.class, args);
}
}

# application.yml配置
spring:
cloud:
gateway:
routes:
– id: service-provider
uri: lb://service-provider
predicates:
– Path=/api/provider/**
filters:
– StripPrefix=2
– id: service-consumer
uri: lb://service-consumer
predicates:
– Path=/api/consumer/**
filters:
– StripPrefix=2

# 测试API网关
$ curl http://fgedudb:8080/api/provider/hello
Hello from service provider!

$ curl http://fgedudb:8080/api/consumer/call
Hello from service provider!

# Spring Cloud Config服务端配置
@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigServerApplication.class, args);
}
}

# 客户端配置
@SpringBootApplication
@EnableEurekaClient
@RestController
public class ConfigClientApplication {
@Value(“${message}”)
private String message;

@GetMapping(“/message”)
public String getMessage() {
return message;
}

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

# bootstrap.yml配置
spring:
application:
name: config-client
cloud:
config:
uri: http://fgedudb:8888
profile: dev

# 测试配置中心
$ curl http://fgedudb:8081/message
Hello from config server!

# Dockerfile示例
FROM openjdk:11-jre-slim
WORKDIR /app
COPY target/service-provider-1.0.0.jar /app/
EXPOSE 8080
CMD [“java”, “-jar”, “service-provider-1.0.0.jar”]

# 构建镜像
$ docker build -t service-provider:1.0.0 .

# 运行容器
$ docker run -d -p 8080:8080 –name service-provider service-provider:1.0.0

# Deployment配置
apiVersion: apps/v1
kind: Deployment
metadata:
name: service-provider
spec:
replicas: 3
selector:
matchLabels:
app: service-provider
template:
metadata:
labels:
app: service-provider
spec:
containers:
– name: service-provider
image: service-provider:1.0.0
ports:
– containerPort: 8080
resources:
requests:
cpu: “100m”
memory: “256Mi”
limits:
cpu: “500m”
memory: “512Mi”

# Service配置
apiVersion: v1
kind: Service
metadata:
name: service-provider
spec:
selector:
app: service-provider
ports:
– port: 80
targetPort: 8080
type: ClusterIP

# 应用配置
$ kubectl apply -f deployment.yaml
$ kubectl apply -f service.yaml

# 查看部署状态
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
service-provider-76d6c9b8c4-5b2x7 1/1 Running 0 5m
service-provider-76d6c9b8c4-7k8z9 1/1 Running 0 5m
service-provider-76d6c9b8c4-9q4t2 1/1 Running 0 5m

$ kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service-provider ClusterIP 10.96.123.45 80/TCP 2m

# Jenkinsfile示例
pipeline {
agent any
stages {
stage(‘Checkout’) {
steps {
git branch: ‘master’, url: ‘https://github.com/fgedu/service-provider.git’
}
}
stage(‘Build’) {
steps {
sh ‘mvn clean package’
}
}
stage(‘Test’) {
steps {
sh ‘mvn test’
}
}
stage(‘Build Image’) {
steps {
sh ‘docker build -t service-provider:${BUILD_NUMBER} .’
sh ‘docker tag service-provider:${BUILD_NUMBER} service-provider:latest’
}
}
stage(‘Push Image’) {
steps {
sh ‘docker push service-provider:${BUILD_NUMBER}’
sh ‘docker push service-provider:latest’
}
}
stage(‘Deploy to Test’) {
steps {
sh ‘kubectl apply -f k8s/test-deployment.yaml’
}
}
stage(‘Deploy to Production’) {
steps {
sh ‘kubectl apply -f k8s/production-deployment.yaml’
}
}
}
post {
success {
echo ‘Build successful!’
}
failure {
echo ‘Build failed!’
}
}
}