Azure: Function host is not running

Question

I have a Function App in azure and when I hit the URL of the function app it says "Function host is not running." I have checked the log also in the app insights or in the Azure portal's function app service, it shows the following error message in the function app.

Note: My pipeline's Build & Releases got succeeded, so I am not sure where to check and what is the solution for this. I tried with a new function app but still no luck.

My Startup.cs file to understand How I have referred the config values,

 public override void Configure(IFunctionsHostBuilder builder)
    {
        //var connectionString = Environment.GetEnvironmentVariable("ConnectionStrings:DBConnection");

        var serviceProvider = builder.Services.BuildServiceProvider();
        _configuration = serviceProvider.GetRequiredService<IConfiguration>();
        var appSettingsSection = _configuration.GetSection("AppSettings");
        builder.Services.Configure<AppSettings>(appSettingsSection);
        var appSettings = appSettingsSection.Get<AppSettings>();
        RuntimeConfig.appsettings = appSettings;

        var ConnectionString = RuntimeConfig.appsettings.AppDBConnection;
        ///builder.Services.AddDbContext<ShardingDbContext>(options => options.UseSqlServer(ConnectionString), ServiceLifetime.Transient);
        //builder.Services.AddScoped<ITestService, TestService>();


    }

    public override void ConfigureAppConfiguration(IFunctionsConfigurationBuilder builder)
    {
        FunctionsHostBuilderContext context = builder.GetContext();

        builder.ConfigurationBuilder
            .AddJsonFile(Path.Combine(context.ApplicationRootPath, "local.settings.json"), optional: true, reloadOnChange: false)
            .AddJsonFile(Path.Combine(context.ApplicationRootPath, $"{context.EnvironmentName}.settings.json"), optional: true, reloadOnChange: false)
            .AddEnvironmentVariables();
    }

I am taking the config values as IConfiguration, it works for my local but don't know how to do the same in the server.

Answer 1

while deploying your Function app it neither upload local.settings.json to Azure or nor makes modification on Application Settings based on local.settings.json file.

The Key-value pair related to EIA present in local.settings.json , add the same key-value pair in Azure Function App Configuration > Application Settings in the Portal.

For that we have to manually update the App Settings in portal or if you are using Visual studio , we can update using VS publish panel .