springboot+grpc+k8s+istio环境-Toy模板网

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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

生成各个服务jar包，上传服务器
- cloud-config.jar
- boot-rpc-service.jar
- boot-grpc-client.jar
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

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

创建service资源

kind: Service
metadata:
  name: web-base
spec:
  ports:
    - name: config8081
      port: 8081
      targetPort: 8081
    - name: gserver18082
      port: 18082
      targetPort: 18082
    - name: gclient8083
      port: 8083
      targetPort: 8083

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

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-base
  http:
      route:
        - destination:
            host: web-base
            subset: dd11
          headers:
            response:
              set:
                ssxppp: ffffffyyyyyyy-internall
---
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: web-base-dr
spec:
  host: web-base
  subsets:
    - name: dd11
      labels:
        version: vv11

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

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.cn
  gateways:
    - grpcdemo-gateway
  http:
      route:
        - destination:
            host: web-base
            subset: dd11
            port:
              number: 8083
          headers:
            response:
              set:
                ssxppp: ffffffyyyyyyy-externall
---
apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: grpcdemo-gateway
spec:
  selector:
    istio: ingressgateway # use Istio default gateway implementation
  servers:
    - port:
        number: 80
        name: http
        protocol: HTTP
      hosts:
        - "grpcdemo.xxx.cn"

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