public void Resize_Vhd_Blob_Shrink()
{
var firstSizeInGb = 2;
var newSizeInGb = 1;
var vhdFilePath = "TestDisk-Shrink.vhd";
var containerName = "test-container";
// First create the fixed VHD file
VhdHelper.CreateVhdDisk(false, firstSizeInGb, vhdFilePath, "Testing Shrink Disk");
var vhdBlobUri = AzureStorageEmulatorHelper.UploadVhdFileToContainer(containerName, vhdFilePath);
// Then resize the VHD file
var resizeVhdHelper = new ResizeVhdHelper();
var firstResult = resizeVhdHelper.ResizeVhdBlob(newSizeInGb, vhdBlobUri, accountName, accountKey);
var finalResult = ResizeResult.Error;
if (firstResult == ResizeResult.Shrink)
{
resizeVhdHelper.IsExpand = false;
finalResult = resizeVhdHelper.DoResizeVhdBlob();
}
var length = AzureStorageEmulatorHelper.GetVhdSizeInContainer(vhdBlobUri);
// Clean the files in the container and the local file system
AddCleanupAction(() => AzureStorageEmulatorHelper.DeleteVhdFileInContainer(containerName, vhdBlobUri));
AddCleanupAction(() => File.Delete(vhdFilePath));
Assert.IsTrue(firstResult == ResizeResult.Shrink);
Assert.IsTrue(finalResult == ResizeResult.Success);
Assert.IsTrue(newSizeInGb == (int)ByteSize.FromBytes(length).GigaBytes);
}
private static int Main(string[] args)
{
WriteHeader();
// Check argument count
if (args.Length < 2)
{
WriteUsage();
return(-1);
}
// Parse arguments
if (!long.TryParse(args[0], out long newSizeInGb) || (newSizeInGb * 1024 * 1024 * 1024) % 512 != 0)
{
Console.WriteLine("Argument size invalid. Please specify a valid disk size in GB (must be a whole number).");
return(-1);
}
if (!Uri.TryCreate(args[1], UriKind.Absolute, out Uri blobUri))
{
Console.WriteLine("Argument bloburl invalid. Please specify a valid URL with an HTTP or HTTPS schema.");
return(-1);
}
var accountName = "";
var accountKey = "";
if (args.Length == 4)
{
accountName = args[2];
accountKey = args[3];
}
else if (!blobUri.Query.Contains("sig="))
{
Console.WriteLine("Please specify either a blob URL with a shared access signature that allows write access or provide full storage credentials.");
return(-1);
}
// Verify size. Size for disk must be <= 1023 GB
if (newSizeInGb > 1023)
{
Console.WriteLine("The given disk size exceeds 1023 GB. Microsoft Azure will not be able to start the virtual machine stored on this disk if you continue.");
Console.WriteLine("See https://msdn.microsoft.com/en-us/library/azure/dn197896.aspx for more information.");
return(-1);
}
// Start the resize process
var resizeVhdHelper = new ResizeVhdHelper();
var result = resizeVhdHelper.ResizeVhdBlob((int)newSizeInGb, blobUri, accountName, accountKey);
if (result != ResizeResult.Shrink)
{
return((int)result);
}
Console.WriteLine("The specified VHD blob is larger than the specified new size. Shrinking disks is a potentially dangerous operation.");
Console.WriteLine("Do you want to continue with shrinking the disk? (y/n)");
while (true)
{
var consoleKey = Console.ReadKey().KeyChar;
if (consoleKey == 'n')
{
Console.WriteLine("Aborted.");
return(-1);
}
if (consoleKey == 'y')
{
resizeVhdHelper.IsExpand = false;
var finalResult = resizeVhdHelper.DoResizeVhdBlob();
return((int)finalResult);
}
}
}