當 azure 函數運行時，Azure 應用程序配置不會更新

Question

我正在使用 azure 應用程序配置和 azure 功能。

所以我從 azure 應用程序配置中提取所有關鍵值。 但是，如果 azure 函數正在運行，並且我對 azure 應用程序配置中的鍵值進行了任何更改，則 azure func 將不會顯示更新后的值。

下面是我已經實現的代碼

在啟動.cs

public override void Configure(IFunctionsHostBuilder builder)
        {
            var environmentName = Environment.GetEnvironmentVariable("AZURE_FUNCTIONS_ENVIRONMENT");
            if (string.IsNullOrWhiteSpace(environmentName))
                throw new Exception("AZURE_FUNCTIONS_ENVIRONMENT could not be resolved.");

            var hostEnvironment = new HostEnvironment { EnvironmentName = environmentName };
            var config = SetUpConfiguration(builder.Services, hostEnvironment);

            var appSettings = config.Get<TSettings>();
            appSettings.AppName = _appName;

            builder.Services.AddSingleton<ICorrelationIdProvider>(new FunctionAppCorrelationIdProvider());
            builder.Services.AddSingleton<IIdentityProvider>(new FunctionAppIdentityProvider(appSettings.AppName));
            builder.Services.AddSingleton<IHostEnvironment>(hostEnvironment);
            builder.Services.AddSingleton(appSettings);

}

    private IConfiguration SetUpConfiguration(IServiceCollection services, IHostEnvironment environment)
            {
                var executionContextOptions = services.BuildServiceProvider().GetService<IOptions<ExecutionContextOptions>>().Value;
                var configBuilder = new ConfigurationBuilder().Initialize(environment, executionContextOptions.AppDirectory);
                var config = configBuilder.Build();
                services.AddSingleton<IConfiguration>(new ConfigurationRoot(config.Providers.ToArray()));
                return config;
            }

在助手類中，我編寫了以下代碼

 builder.AddAzureAppConfiguration(appConfigurationOptions =>
            appConfigurationOptions
                .Connect(new Uri(config["AppConfig:Endpoint"]), tokenCredential)
                .Select(ConfigurationKeys.AZURE_FUNC_TEST)
                .Select(KeyFilter.Any, environment.EnvironmentName)
                .ConfigureRefresh(refreshOptions =>
                {                 
                    refreshOptions.Register(ConfigurationKeys.AZURE_FUNC_TEST, false);
                    refreshOptions.SetCacheExpiration(TimeSpan.FromMinutes(1));
                })
                
        );
        return builder;

在 azure 函數中，我使用下面的代碼來獲取值

var test = _settings.AzureFuncTest;

但在這里我沒有得到新值，直到我不重新啟動 azure 函數。

Answer 1

我已更新問題中的SetUpConfiguration方法，以將代碼包含在設置應用程序配置的輔助方法中。 雖然問題不包括如何使用 helper 方法，但下面的代碼將確保configurationRefresher被初始化。

private IConfiguration SetUpConfiguration(IServiceCollection services, IHostEnvironment environment)
{
    var executionContextOptions = services.BuildServiceProvider().GetService<IOptions<ExecutionContextOptions>>().Value;
    var configBuilder = new ConfigurationBuilder().Initialize(environment, executionContextOptions.AppDirectory);
    IConfigurationRefresher configurationRefresher = null;
    TokenCredential tokenCredential = new DefaultAzureCredential();

    configBuilder.AddAzureAppConfiguration(appConfigurationOptions =>
    {
        var settings = configBuilder.Build();

        appConfigurationOptions
            .Connect(new Uri(settings["AppConfig:Endpoint"]), tokenCredential)
            .Select(ConfigurationKeys.AZURE_FUNC_TEST)
            .Select(KeyFilter.Any, environment.EnvironmentName)
            .ConfigureRefresh(refreshOptions =>
            {
                refreshOptions.Register(ConfigurationKeys.AZURE_FUNC_TEST, false);
                refreshOptions.SetCacheExpiration(TimeSpan.FromMinutes(1));
            });

        configurationRefresher = appConfigurationOptions.GetRefresher();
    });

    var configuration = configBuilder.Build();
    services.AddSingleton(configurationRefresher);
    services.AddSingleton<IConfiguration>(configuration);

    return configuration;
}

此外，語句var appSettings = config.Get<TSettings>()將在那時創建設置的副本，並且不會反映IConfiguration實例中的更改。 為了能夠看到最新的設置，請使用IOptionsMonitor<T>的描述在這里。