.net_core应用程序迁移到云端后自动化配置环境变量的做法实用指南

# 创建资源组
az group create --name myResourceGroup --location eastus
# 创建App Service计划
az appservice plan create --name myAppServicePlan --resource-group myResourceGroup --sku B1
# 创建Web应用
az webapp create --name myUniqueAppName --resource-group myResourceGroup --plan myAppServicePlan
# 设置环境变量
az webapp config appsettings set --name myUniqueAppName --resource-group myResourceGroup --settings "DatabaseConnectionString=$CONN_STRING" "ApiKey=$API_KEY"

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }
    public IConfiguration Configuration { get; }
    public void ConfigureServices(IServiceCollection services)
    {
        // 读取环境变量
        var dbConnectionString = Configuration["DatabaseConnectionString"];
        var apiKey = Configuration["ApiKey"];
        // 使用环境变量配置服务
        services.AddDbContext<AppDbContext>(options => 
            options.UseSqlServer(dbConnectionString));
        services.AddSingleton(new ApiService(apiKey));
    }
}

# azure-pipelines.yml
variables:
  - group: ProductionEnvVars
steps:
- task: DotNetCoreCLI@2
  inputs:
    command: 'publish'
    publishWebProjects: true
    arguments: '--configuration Release --output $(Build.ArtifactStagingDirectory)'
- task: AzureWebApp@1
  inputs:
    azureSubscription: 'MyAzureSubscription'
    appName: 'myUniqueAppName'
    package: '$(Build.ArtifactStagingDirectory)/**/*.zip'
    appSettings: |
      [
        {
          "name": "DatabaseConnectionString",
          "value": "$(DB_CONNECTION_STRING)",
          "Setting": false
        },
        {
          "name": "AppInsightsInstrumentationKey",
          "value": "$(APP_INSIGHTS_KEY)",
          "Setting": false
        }
      ]

# main.tf
resource "azurerm_app_service" "example" {
  name                = "example-app-service"
  location            = azurerm_resource_group.example.location
  resource_group_name = azurerm_resource_group.example.name
  app_service_plan_id = azurerm_app_service_plan.example.id
  app_settings = {
    "DATABASE_URL"     = var.database_url
    "APP_ENV"          = "production"
    "SECRET_KEY"       = var.secret_key
  }
}
# 在variables.tf中定义变量
variable "database_url" {
  description = "The database connection URL"
  sensitive   = true
}
variable "secret_key" {
  description = "The application secret key"
  sensitive   = true
}

// 环境变量验证示例
public void ConfigureServices(IServiceCollection services)
{
    var requiredVars = new[] { "DB_CONNECTION", "API_KEY" };
    var missingVars = requiredVars.Where(v => string.IsNullOrEmpty(Configuration[v])).ToList();
    if (missingVars.Any())
    {
        throw new ApplicationException(
            $"缺少必需的环境变量: {string.Join(", ", missingVars)}");
    }
    // 其他服务配置...
}