快速部署Dubbo应用

快速部署Dubbo应用

在上一篇文章中,我们学习了如何开发基于 Spring Boot 的 Dubbo 应用。接下来,我们将学习部署这个 Dubbo 应用。

本文将以 Kubernetes 集群作为基础环境来讲解 Dubbo 应用的部署,部署架构如下图所示:

Dubbo+Kubernetes+Nacos 部署架构图

部署应用

我们为您提前准备好了示例项目的镜像与部署文件,您可以使用如下命令将示例快速部署到 Kubernetes 集群(请确保在示例源码根目录执行如下命令):

kubectl apply -f ./Kubernetes-manifests.yaml

以上命令将自动部署如下资源:

  • dubbo-system 命名空间
    • Nacos Deployment
    • Nacos Service
  • dubbo-quickstart 命名空间
    • Quickstart Deployment
    • Quickstart Service

运行以下命令,确认资源已经部署成功:

kubectl get services -n dubbo-system
kubectl get services -n dubbo-quickstart

访问应用

部署成功后,可以通过以下方式检查应用状态。


执行以下命令进行本地端口映射:

kubectl port-forward <pod-name> 50051:50051 -n dubbo-quickstart

通过 curl 访问服务:

curl \
	--header "Content-Type: application/json" \
	--data '["Dubbo"]' \
	http://localhost:50051/org.apache.dubbo.samples.quickstart.dubbo.api.DemoService/sayHello/

对于云上托管的 Kubernetes 集群,您同样可以使用 port-forward 的方式进行本地访问。除此之外,您也可以通过配置负载均衡(Load Balancer)开放公网访问方式,如下图所示:

阿里云托管部署架构图

附录

如果你有修改示例源码并需要重新打包 docker 镜像,请在示例根目录运行如下命令,随后将镜像推送到远端镜像仓库并修改 kubernetes-manifests.yaml 中的镜像地址后重新部署。

docker build -f ./Dockerfile --build-arg APP_FILE=quickstart-service-0.0.1-SNAPSHOT.jar -t demo:latest .

本示例 Kubernetes 部署资源文件也可在 Github 访问:https://raw.githubusercontent.com/apache/dubbo-samples/master/11-quickstart/Kubernetes-manifests.yaml

# Namespace
apiVersion: v1
kind: Namespace
metadata:
  name: dubbo-quickstart
---
apiVersion: v1
kind: Namespace
metadata:
  name: dubbo-system
---

# Nacos
apiVersion: apps/v1
kind: Deployment
metadata:
  name: nacos
  namespace: dubbo-system
spec:
  replicas: 1
  selector:
    matchLabels:
      app: nacos
  template:
    metadata:
      labels:
        app: nacos
    spec:
      containers:
        - name: consumer
          image: nacos-registry.cn-hangzhou.cr.aliyuncs.com/nacos/nacos-server:v2.1.2
          imagePullPolicy: Always
          resources:
            requests:
              memory: "2Gi"
              cpu: "500m"
          ports:
            - containerPort: 8848
              name: client
            - containerPort: 9848
              name: client-rpc
          env:
            - name: NACOS_SERVER_PORT
              value: "8848"
            - name: NACOS_APPLICATION_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
            - name: MODE
              value: "standalone"
            - name: NACOS_AUTH_ENABLE
              value: "true"
---
apiVersion: v1
kind: Service
metadata:
  name: nacos
  namespace: dubbo-system
spec:
  type: ClusterIP
  sessionAffinity: None
  selector:
    app: nacos
  ports:
    - port: 8848
      name: server
      targetPort: 8848
    - port: 9848
      name: client-rpc
      targetPort: 9848
---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: quickstart
  namespace: dubbo-quickstart
spec:
  replicas: 1
  selector:
    matchLabels:
      app: quickstart
  template:
    metadata:
      labels:
        app: quickstart
    spec:
      containers:
        - name: quickstart
          image: sca-registry.cn-hangzhou.cr.aliyuncs.com/dubbo/dubbo-quickstart:1.0
          imagePullPolicy: Always
          ports:
            - name: dubbo
              containerPort: 50051
              protocol: TCP
            - name: dubbo-qos
              containerPort: 22222
              protocol: TCP
          env:
            - name: JAVA_TOOL_OPTIONS
              value: "-Dnacos.address=nacos.dubbo-system.svc"
---

apiVersion: v1
kind: Service
metadata:
  name: quickstart
  namespace: dubbo-quickstart
spec:
  selector:
    app: quickstart
  ports:
    - name: tcp
      port: 50051
      targetPort: 50051
    - name: http
      port: 22222
      targetPort: 22222
---
最后修改 September 17, 2024: fix doc (8b1dd8c278b)