Dapr 微服务+K8S入门示例

此示例是使用Furion的.net框架+Dapr来实现的微服务，示例有简单的业务示例。含服务间的调用，订阅/发布。在K8S中实际运行起来，并测试正常。

我的环境是四台服务器
单机部署的docker服务为 172.31.119.226
k8s服务为

此教程都是在linux环境下进行的操作，无windows环境教程，可能部分操作需要自己FQ操作

现在安装Dapr Cli环境

wget -q https://raw.githubusercontent.com/dapr/cli/master/install/install.sh -O - | /bin/bash
## 运行dapr命令可以看到以下，则代表成功
dapr

如果下载不了，可以自己去GitHub下载安装包，解压后拷贝到/usr/local/bin目录即可。

运行dapr init,等待初始化完成，然后验证输入dapr --version,一定要CLI和runtime都有版本号才可以。

• 使用Dapr Cli安装
  运行dapr init -k,等待初始化完成，不过我都没成功过，用helm可以确保成功，且简单。

• Helm安装
  需要先安装Helm，具体百度，也很简单，就下载安装包，解压，拷贝到目录。mv linux-amd64/helm /usr/local/bin/helm

helm repo add dapr https://daprio.azurecr.io/helm/v1/repo
helm repo update

helm search repo dapr --devel --versions

helm upgrade --install dapr dapr/dapr 
--version=1.2     #根据上面查询的实际版本来
--namespace dapr-system 
--create-namespace 
--wait

Dockerfile文件

FROM mcr.microsoft.com/dotnet/aspnet:5.0 as bookservice
WORKDIR /app
RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone
COPY todo.book.API/ /app
ENTRYPOINT ["dotnet", "todo.book.API.dll"]
FROM mcr.microsoft.com/dotnet/aspnet:5.0 as userservice
WORKDIR /app
RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone
COPY todo.user.API/ /app
ENTRYPOINT ["dotnet", "todo.user.API.dll"]

打包docker

docker build . -t bookservice:latest --target bookservice --no-cache
docker build  -t userservice:latest --target userservice .

dapr run --app-id TodoUserService --app-port 6001 --dapr-http-port 6011 -- dotnet todo.user.API.dll --urls "http://*:6001"

dapr run --app-id TodoBooksService --app-port 6002 --dapr-http-port 6012 -- dotnet todo.book.API.dll --urls "http://*:6002"

分别进入程序编译完成后目录，运行上面语句，等待成功后，在浏览器输入地址http://172.31.119.226:6002/index.html

运行dapr list查看当前已经运行的dapr appid

也可以在服务器上收到调用接口

dapr invoke --app-id TodoUserService --method  /api/users/books --data '{ "name": "string", "type": "string", "url": "string", "socre": 0,"author": "string", "pages": 0, "isbn": "string", "file": "string", "contentValidity": "string", "isFinish": true, "isShow": true, "userId": 0 }'

创建vi Daprdemo.yaml文件

apiVersion: v1
kind: Namespace
metadata:
  name: dapr-demo
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: userservice
  namespace: dapr-demo
  labels:
    app: userservice
spec:
  replicas: 1
  selector:
    matchLabels:
      app: userservice
  template:
    metadata:
      labels:
        app: userservice
      annotations:
        dapr.io/enabled: "true"
        dapr.io/app-id: "todouserservice"
        dapr.io/app-port: "80"
        dapr.io/sidecar-liveness-probe-delay-seconds: "10"
        dapr.io/sidecar-readiness-probe-delay-seconds: "10"
        dapr.io/log-as-json: "true"
    spec:
      containers:
        - name: userservice
          image: 172.31.119.226:5000/userservice:latest
          ports:
            - containerPort: 80
          imagePullPolicy: Always
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: bookservice
  namespace: dapr-demo
  labels:
    app: bookservice
spec:
  replicas: 2
  selector:
    matchLabels:
      app: bookservice
  template:
    metadata:
      labels:
        app: bookservice
      annotations:
        dapr.io/enabled: "true"
        dapr.io/app-id: "todobooksservice"
        dapr.io/app-port: "80"
        dapr.io/sidecar-liveness-probe-delay-seconds: "10"
        dapr.io/sidecar-readiness-probe-delay-seconds: "10"
    spec:
      containers:
        - name: bookservice
          image: 172.31.119.226:5000/bookservice:latest
          ports:
            - containerPort: 80
          imagePullPolicy: Always
---
apiVersion: v1
kind: Service
metadata:
  name: userservice
  namespace: dapr-demo
spec:
  type: NodePort
  selector:
    app: userservice
  ports:
    - port: 80
      targetPort: 80
      nodePort: 30006
---
apiVersion: v1
kind: Service
metadata:
  name: bookservice
  namespace: dapr-demo
spec:
  type: NodePort
  selector:
    app: bookservice
  ports:
    - port: 80
      targetPort: 80
      nodePort: 30007

执行脚本 kubectl apply -f Daprdemo.yaml 后完成

然后打开浏览器，输入http://172.31.119.69:30006/index.html可查看userserivce服务

查看darp情况

调用接口测试

查看bookservicepod的运行日志kubectl logs -f userservice-77f467bb64-gpczv --all-containers=true -n dapr-demo

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