private static async Task <Platform> LoadInstanceAsync()
{
// The order matters here:
// * GAE runs on GCE, so do GAE before GCE.
// * GKE runs on GCE, so do GKE before GCE.
// * Metadata server access can take time, so do GAE first.
GaePlatformDetails gaeDetails = LoadGaeDetails();
if (gaeDetails != null)
{
return(new Platform(gaeDetails));
}
var metadataJson = await LoadMetadataAsync().ConfigureAwait(false);
if (metadataJson != null)
{
var kubernetesData = await GkePlatformDetails.LoadKubernetesDataAsync().ConfigureAwait(false);
if (kubernetesData != null)
{
GkePlatformDetails gkeDetails = GkePlatformDetails.TryLoad(metadataJson, kubernetesData);
if (gkeDetails != null)
{
return(new Platform(gkeDetails));
}
}
GcePlatformDetails gceDetails = GcePlatformDetails.TryLoad(metadataJson);
if (gceDetails != null)
{
return(new Platform(gceDetails));
}
}
return(new Platform());
}
/// <summary>
/// Construct with details of Google Compute Engine.
/// </summary>
/// <param name="gceDetails">Details of Google Compute Engine.</param>
public Platform(GcePlatformDetails gceDetails)
{
GceDetails = GaxPreconditions.CheckNotNull(gceDetails, nameof(gceDetails));
}