1.1 Dapr环境配置
1.1.1 在开发机安装Docker Desktop并启用Kubernetes
安装过程略,安装好后效果如下:(左下角两个绿色指示Docker和K8s正在运行)
1.1.2 在开发机安装Dapr Cli
安装命令:
powershell -Command "iwr -useb https://raw.githubusercontent.com/dapr/cli/master/install/install.ps1 | iex"
将会安装到如下目录:
验证安装命令:
dapr
1.1.3 为开发机配置Dapr
配置命令:
dapr init
验证命令:
dapr --version
命令:docker ps 可以看到多了Dapr自动加了三个容器:
1.1.4 为K8s配置Dapr
配置命令:
dapr init -k
验证命令:
kubectl get pods --namespace dapr-system
可通过命令:
kubectl port-forward deploy/dapr-dashboard --namespace dapr-system 8080:8080
访问Dapr Dashbord
1.2 创建项目
1.2.1 创建Blazor WebAssembly项目
注意选择Asp.net Core hosted
1.2.2 向解决方案添加Asp.net Core WebApi项目
添加完如图,我增加了两个解决方案文件夹BlazorWeb和ServiceAPI以方便区分前端和后端。
启动DaprTest1.Server Project运行:启动端口配置为8000
1.3 直接调用微服务
当前解决方案中,DaprTest1.Client Blazor 项目的Fetch data 功能会调用DaprTest1.Server项目的WeatherForecastController.cs 中的Get接口以获取天气预报信息。
我们需要修改为:在DaprTest1.Server项目的的Get接口不再直接返回天气预报信息,而是调用DaprTest1.ServiceApi1项目的WeatherForecastController中的Get 接口获取天气预报。
1.3.1 引用Refit包
在项目DaprTest1.Server中安装Refit 包。
1.3.2 修改相关代码
在项目DaprTest1.ServiceApi1中引用DaprTest1.Shared项目,并删除原来的Wheatherforcast.cs实体类。
在项目DaprTest1.Server 中新增文件ICallServiceApi1.cs,并添加如下代码:
public interface ICallServiceApi1{[Get("/WeatherForecast")]Task<IEnumerable<WeatherForecast>> GetWeatherForecast();}
在项目DaprTest1.Server 的Startup.cs 中新增如下代码,其中http://localhost:8001 是ServiceApi1接口访问地址
// 注入httpClient
services.AddHttpClient("HttpClient").AddTypedClient(client =>{client.BaseAddress = new Uri("http://localhost:8001");return RestService.For<ICallServiceApi1>(client);});
修改项目DaprTest1.Server WeatherForecastController.cs 中的Get接口如下:
public class WeatherForecastController : ControllerBase{private readonly ILogger<WeatherForecastController> _logger;private readonly ICallServiceApi1 _callServiceApi1;public WeatherForecastController(ILogger<WeatherForecastController> logger, ICallServiceApi1 callServiceApi1){_logger = logger;_callServiceApi1 = callServiceApi1;}[HttpGet]public async Task<IEnumerable<WeatherForecast>> Get(){return await _callServiceApi1.GetWeatherForecast();}}
分别启动DaprTest1.Server 和 DaprTest1.ServiceApi1项目,访问http://localhost:8000/ 可看到效果, 效果图略。
1.4 通过Dapr调用微服务
我们需要修改为:在DaprTest1.Server中不直接调用DaprTest1.ServiceApi1的接口地址获取天气预报信息,而是通过Dapr调用DaprTest1.ServiceApi1 的服务ID来获取天气预报信息.
1.4.1 引用Dapr.Client包
在项目DaprTest1.Server中安装Dapr.Client包
1.4.2 修改相关代码
在项目DaprTest1.Server 的Startup.cs 中修改如下代码: 本代码参考了 张善友大神的
Dapr 客户端 搭配 WebApiClientCore 玩耍服务调用
services.AddScoped<InvocationHandler>();// 注入httpClientservices.AddHttpClient("HttpClient").AddHttpMessageHandler<InvocationHandler>().AddTypedClient(client =>{client.BaseAddress = new Uri("http://serviceapi1");return RestService.For<ICallServiceApi1>(client);});
1.4.3 在Dapr中运行项目
分别在DaprTest1.Server和DaprTest1.ServiceApi1项目中添加文件dapr-selfhosted.ps1
文件内容分别为:
dapr run `--app-id blazorweb `--app-port 8000 `--dapr-http-port 3600 `--dapr-grpc-port 60000 `dotnet run
dapr run `--app-id serviceapi1 `--app-port 8001 `--dapr-http-port 3601 `--dapr-grpc-port 60001 `dotnet run
PowerShell分别启动DaprTest1.Server 和 DaprTest1.ServiceApi1项目下面的dapr-selfhosted.ps1文件, 访问 http://localhost:8000/ 即可看到效果
1.5 在K8s中运行项目
1.5.1 添加Docker文件生成镜像
分别在DaprTest1.Server和DaprTest1.ServiceApi1项目中添加Docker文件dockerfile, 并修改文件内容如下:
ARG NET_IMAGE=5.0-buster-slimFROM mcr.microsoft.com/dotnet/aspnet:${NET_IMAGE} AS baseWORKDIR /appEXPOSE 5000FROM mcr.microsoft.com/dotnet/sdk:${NET_IMAGE} AS buildWORKDIR /srcCOPY ["Server/DaprTest1.Server.csproj", "Server/"]COPY ["Shared/DaprTest1.Shared.csproj", "Shared/"]COPY ["Client/DaprTest1.Client.csproj", "Client/"]RUN dotnet restore "Server/DaprTest1.Server.csproj"COPY . .WORKDIR "/src/Server"RUN dotnet build "DaprTest1.Server.csproj" -c Release -o /app/buildFROM build AS publishRUN dotnet publish "DaprTest1.Server.csproj" -c Release -o /app/publishFROM base AS finalWORKDIR /appCOPY --from=publish /app/publish .ENTRYPOINT ["dotnet", "DaprTest1.Server.dll"]
#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.ARG NET_IMAGE=5.0-buster-slim
FROM mcr.microsoft.com/dotnet/aspnet:${NET_IMAGE} AS base
WORKDIR /app
EXPOSE 5000FROM mcr.microsoft.com/dotnet/sdk:${NET_IMAGE} AS build
WORKDIR /src
COPY ["ServiceApi/DaprTest1.ServiceApi1/DaprTest1.ServiceApi1.csproj", "ServiceApi/DaprTest1.ServiceApi1/"]
COPY ["Shared/DaprTest1.Shared.csproj", "Shared/"]
RUN dotnet restore "ServiceApi/DaprTest1.ServiceApi1/DaprTest1.ServiceApi1.csproj"
COPY . .
WORKDIR "/src/ServiceApi/DaprTest1.ServiceApi1"
RUN dotnet build "DaprTest1.ServiceApi1.csproj" -c Release -o /app/buildFROM build AS publish
RUN dotnet publish "DaprTest1.ServiceApi1.csproj" -c Release -o /app/publishFROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "DaprTest1.ServiceApi1.dll"]
在解决方案根目录增加文件build-docker-images.ps1 以生成Docker image,文件内容如下:
docker build -t dapr-test1/blazorweb:1.0 -f Server/Dockerfile .
docker build -t dapr-test1/serviceapi1:1.0 -f ServiceApi/DaprTest1.ServiceApi1/Dockerfile .
在解决方案根目录执行build-docker-images.ps1后, 可看到生成的两个镜像:
1.5.2 部署Docker镜像到K8s
在解决方案根目录新建文件夹 Deploy, 放置k8s部署文件
其中deploy.ps1 为部署命令,内容如下:
kubectl apply `-f namespace.yaml `-f dapr-config.yaml `-f blazorweb.yaml `-f serviceapi1.yaml
部署完成后,可通过端口转发给node看到效果.
代码地址:iamxiaozhuang/dapr-test (github.com)