2023年8月17日，本人之前使用过nacos+dubbo+springboot、eureka+feign等环境。最近学习到了istio服务网格集成到k8s也可以实现分布式微服务。

1. 环境

• Kubernetes集群
• istio集成到k8s
• jdk17 (8也ok)
• gPRC服务间通信

2. 微服务

• cloud-config服务是spring-cloud-config-server配置中心，用于加载远程配置文件，该服务端口号8081
• boot-rpc-service服务是生产者微服务，开放的gRPC端口18082
• boot-grpc-client服务是消费者微服务，开放的http端口是8083，开放接口/test1?name=hello实现了grpc调用生产者微服务
• 公共服务boot-grpc-api是生成的grpc proto信息

3. 部署到k8s

本地测试成功后，部署k8s

1. 生成各个服务jar包，上传服务器

   • cloud-config.jar
   • boot-rpc-service.jar
   • boot-grpc-client.jar

2. 构建各个服务docker镜像

   • istio-demo-spring-configserver:v3
   • istio-demo-spring-gprc-server:v3
   • istio-demo-spring-gprc-client:v3

3. 创建各个微服务deployment资源

   - image: 'istio-demo-spring-configserver:v3'ports:- containerPort: 8081
   

   - image: 'istio-demo-spring-gprc-server:v3'ports:- containerPort: 18082
   

   - image: 'istio-demo-spring-gprc-client:v3'ports:- containerPort: 8083
   

4. 创建service资源

   kind: Service
   metadata:name: web-base
   spec:ports:- name: config8081port: 8081targetPort: 8081- name: gserver18082port: 18082targetPort: 18082- name: gclient8083port: 8083targetPort: 8083
   

5. 到此还没使用istio的功能，先验证一下服务是否正常启动
   curl -I "http://web-base:8083/test1?name=hello"
   结果;
   HTTP/1.1 200 OK
   content-type: text/plain;charset=UTF-8
   content-length: 14
   date: Thu, 17 Aug 2023 02:40:23 GMT
   x-envoy-upstream-service-time: 32
   server: envoy

6. 创建istio虚拟服务用于内部grpc通信

   apiVersion: networking.istio.io/v1alpha3
   kind: VirtualService
   metadata:name: web-base-internal-vs
   spec:hosts:- web-basehttp:route:- destination:host: web-basesubset: dd11headers:response:set:ssxppp: ffffffyyyyyyy-internall
   ---
   apiVersion: networking.istio.io/v1alpha3
   kind: DestinationRule
   metadata:name: web-base-dr
   spec:host: web-basesubsets:- name: dd11labels:version: vv11
   

7. 使用istio的功能，先验证一下内部服务是否添加了响应header信息
   curl -I "http://web-base:8083/test1?name=hello"
   结果;
   HTTP/1.1 200 OK
   content-type: text/plain;charset=UTF-8
   content-length: 14
   date: Thu, 17 Aug 2023 02:40:23 GMT
   x-envoy-upstream-service-time: 32
   server: envoy
   ssxppp: ffffffyyyyyyy-internall

8. 创建istio网关和虚拟服务用于外部交互

   apiVersion: networking.istio.io/v1alpha3
   kind: VirtualService
   metadata:name: web-base-external-vs
   spec:hosts:- grpcdemo.xxx.cngateways:- grpcdemo-gatewayhttp:route:- destination:host: web-basesubset: dd11port:number: 8083headers:response:set:ssxppp: ffffffyyyyyyy-externall
   ---
   apiVersion: networking.istio.io/v1alpha3
   kind: Gateway
   metadata:name: grpcdemo-gateway
   spec:selector:istio: ingressgateway # use Istio default gateway implementationservers:- port:number: 80name: httpprotocol: HTTPhosts:- "grpcdemo.xxx.cn"
   

9. 验证外部访问是否成功
   curl -I -HHost:grpcdemo.xxx.cn "http://192.168.0.101:32318/test1?name=hello" （端口号是ingressgateway服务的nodeport）
   结果;
   HTTP/1.1 200 OK
   content-type: text/plain;charset=UTF-8
   content-length: 14
   date: Thu, 17 Aug 2023 02:40:23 GMT
   x-envoy-upstream-service-time: 32
   server: envoy
   ssxppp: ffffffyyyyyyy-extenall

源码

https://github.com/shenshuxin01/grpc-springboot/tree/dev-istio