public void SetupWriters(Guid[] includedWriters, Guid[] excludedWriters)
{
if (includedWriters != null && includedWriters.Length > 0)
{
_vssBackupComponents.EnableWriterClasses(includedWriters);
}
if (excludedWriters != null && excludedWriters.Length > 0)
{
_vssBackupComponents.DisableWriterClasses(excludedWriters);
}
try
{
_vssBackupComponents.GatherWriterMetadata();
}
finally
{
_vssBackupComponents.FreeWriterMetadata();
}
if (includedWriters == null)
{
return;
}
// check if writers got enabled
foreach (var writerGUID in includedWriters)
{
if (!_vssBackupComponents.WriterMetadata.Any(o => o.WriterId.Equals(writerGUID)))
{
throw new Exception(string.Format("Writer with GUID {0} was not added to VSS writer set.", writerGUID.ToString()));
}
}
}
public void DoSnapshot()
{
try
{
logger.Debug("Doing snapshot...");
IVssImplementation vssImplementation = VssUtils.LoadImplementation();
backup = vssImplementation.CreateVssBackupComponents();
backup.InitializeForBackup(null);
backup.SetBackupState(false, false, VssBackupType.Copy, false);
backup.EnableWriterClasses();
backup.GatherWriterMetadata();
backup.GatherWriterStatus();
backup.SetContext(VssSnapshotContext.AppRollback);
snapshotSetId = backup.StartSnapshotSet();
String rootPath = Volume.GetUniqueVolumeNameForPath(path);
logger.Debug("RootPath: {0}.", rootPath);
snapshotId = backup.AddToSnapshotSet(rootPath);
backup.PrepareForBackup();
backup.DoSnapshotSet();
//File.WriteAllText(@"d:" + Path.DirectorySeparatorChar + "Document.xml", backup.SaveAsXml());
backup.BackupComplete();
}
catch (Exception e)
{
logger.Error("Error occurred when doing snapshot, info: {0}.", e);
}
}
private void BackupSubset(IDictionary <string, string> vmNamesMapSubset, Options options)
{
IVssImplementation vssImpl = VssUtils.LoadImplementation();
using (IVssBackupComponents vss = vssImpl.CreateVssBackupComponents())
{
RaiseEvent(EventAction.InitializingVSS, null, null);
vss.InitializeForBackup(null);
vss.SetBackupState(true, true, VssBackupType.Full, false);
vss.SetContext(VssSnapshotContext.Backup);
// Add Hyper-V writer
Guid hyperVwriterGuid = new Guid("66841cd4-6ded-4f4b-8f17-fd23f8ddc3de");
vss.EnableWriterClasses(new Guid[] { hyperVwriterGuid });
vss.GatherWriterMetadata();
IList <IVssWMComponent> components = new List <IVssWMComponent>();
// key: volumePath, value: volumeName. These values are equivalent on a standard volume, but differ in the CSV case
IDictionary <string, string> volumeMap = new Dictionary <string, string>();
var wm = vss.WriterMetadata.Where((o) => o.WriterId.Equals(hyperVwriterGuid)).FirstOrDefault();
foreach (var component in wm.Components)
{
if (vmNamesMapSubset.ContainsKey(component.ComponentName))
{
components.Add(component);
vss.AddComponent(wm.InstanceId, wm.WriterId, component.Type, component.LogicalPath, component.ComponentName);
foreach (var file in component.Files)
{
string volumeName = null;
string volumePath = null;
volumePath = Path.GetPathRoot(file.Path).ToUpper();
volumeName = volumePath;
if (!volumeMap.ContainsKey(volumePath))
{
volumeMap.Add(volumePath, volumeName);
}
}
}
}
if (components.Count > 0)
{
Guid vssSet = vss.StartSnapshotSet();
// Key: volumeName, value: snapshotGuid
IDictionary <string, Guid> snapshots = new Dictionary <string, Guid>();
foreach (var volumeName in volumeMap.Values)
{
snapshots.Add(volumeName, vss.AddToSnapshotSet(volumeName, Guid.Empty));
}
vss.PrepareForBackup();
RaiseEvent(EventAction.StartingSnaphotSet, components, volumeMap);
vss.DoSnapshotSet();
RaiseEvent(EventAction.SnapshotSetDone, components, volumeMap);
// key: volumeName, value: snapshotVolumePath
IDictionary <string, string> snapshotVolumeMap = new Dictionary <string, string>();
foreach (var kv in snapshots)
{
snapshotVolumeMap.Add(kv.Key, vss.GetSnapshotProperties(kv.Value).SnapshotDeviceObject);
}
BackupFiles(components, volumeMap, snapshotVolumeMap, vmNamesMapSubset, options);
foreach (var component in components)
{
vss.SetBackupSucceeded(wm.InstanceId, wm.WriterId, component.Type, component.LogicalPath, component.ComponentName, true);
}
vss.BackupComplete();
RaiseEvent(EventAction.DeletingSnapshotSet, components, volumeMap);
vss.DeleteSnapshotSet(vssSet, true);
}
}
}
/// <summary>
/// For all Hyper-V guests it enumerate all associated paths using VSS data
/// </summary>
/// <returns>A collection of VMs and paths</returns>
private Dictionary <string, List <string> > GetAllVMsPathsVSS()
{
IVssBackupComponents m_backup = null;
var ret = new Dictionary <string, List <string> >();
try
{
//Substitute for calling VssUtils.LoadImplementation(), as we have the dlls outside the GAC
string alphadir = Path.Combine(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location), "alphavss");
string alphadll = System.IO.Path.Combine(alphadir, VssUtils.GetPlatformSpecificAssemblyShortName() + ".dll");
IVssImplementation vss = (IVssImplementation)System.Reflection.Assembly.LoadFile(alphadll).CreateInstance("Alphaleonis.Win32.Vss.VssImplementation");
m_backup = vss.CreateVssBackupComponents();
m_backup.InitializeForBackup(null);
m_backup.SetContext(VssSnapshotContext.Backup);
m_backup.SetBackupState(false, true, VssBackupType.Full, false);
m_backup.EnableWriterClasses(new Guid[] { HyperVWriterGuid });
try
{
m_backup.GatherWriterMetadata();
var writerMetaData = m_backup.WriterMetadata.FirstOrDefault(o => o.WriterId.Equals(HyperVWriterGuid));
if (writerMetaData == null)
{
throw new Exception("Microsoft Hyper-V VSS Writer not found - cannot backup Hyper-V machines.");
}
foreach (var component in writerMetaData.Components)
{
var paths = new List <string>();
foreach (var file in component.Files)
{
if (file.FileSpecification.Contains("*"))
{
if (Directory.Exists(Utility.Utility.AppendDirSeparator(file.Path)))
{
paths.Add(Utility.Utility.AppendDirSeparator(file.Path));
}
}
else
{
if (File.Exists(Path.Combine(file.Path, file.FileSpecification)))
{
paths.Add(Path.Combine(file.Path, file.FileSpecification));
}
}
}
ret.Add(component.ComponentName, paths.Distinct(Utility.Utility.ClientFilenameStringComparer).OrderBy(a => a).ToList());
}
}
finally
{
m_backup.FreeWriterMetadata();
}
}
finally
{
try
{
if (m_backup != null)
{
m_backup.Dispose();
}
}
catch { }
}
return(ret);
}
