Detect change in KeyVault references

[pratyushoak]

I have an Azure Function, where we use Azure App Configuration to pull a certificate from our KeyVault. The AppConfiguration to KeyVault reference has been setup. The AppConfiguration registration looks something like this -

aadConfigBuilder.AddAzureAppConfiguration(options =>
            {
                options.Connect(Environment.GetEnvironmentVariable("AppConfiguration:ConnectionString"))
                    .ConfigureKeyVault(kv =>
                       {
                           kv.SetCredential(new DefaultAzureCredential());
                       })
                    .Select("ExternalSystemAuthentication:AadConfig:*")
                       .ConfigureRefresh(refreshOptions =>
                            refreshOptions
                            /* .Register("ExternalSystemAuthentication:AadConfig:AuthCert", refreshAll: true) */ // want to detect when this changes
                            .Register("ExternalSystemAuthentication:AadConfig:Sentinel", refreshAll: true) // this works as expected
                            .SetCacheExpiration(TimeSpan.FromMinutes(2)));
                configurationRefresher = options.GetRefresher();
            });

Everything works as expected when I use a value based 'Sentinel' key to detect a change in config. However, in my case I have auto-rotation setup on the KeyVault certificate. When a new version is available, I want the latest version to be pulled into my Function. However, since the KeyVault reference is just a URL its value does not change in the AppConfiguration, and this key cannot be used as the observable key. So I am forced to manually update the 'Sentinel' so that my function can refresh config. Is there a way App Configuration can detect a change in the KV secret value? Or is there a way I can force refresh of the App Configuration periodically without checking for a change in any key?
Thanks.

[drago-draganov]

Thanks for reporting this, pratyushoak
We need to address this case. Please stay tuned.

[avanigupta]

This feature has been released in package version 4.4.0:

• Microsoft.Extensions.Configuration.AzureAppConfiguration
• Microsoft.Azure.AppConfiguration.AspNetCore