/// <summary>
/// <para>
/// Adds a new disk to a virtual machine.
/// </para>
/// <note>
/// The virtual machine must be stopped.
/// </note>
/// </summary>
/// <param name="virtualMachine">The target virtual machine.</param>
/// <param name="disk">The disk information.</param>
public void AddDisk(XenVirtualMachine virtualMachine, XenVirtualDisk disk)
{
Covenant.Requires <ArgumentNullException>(virtualMachine != null, nameof(virtualMachine));
Covenant.Requires <ArgumentNullException>(disk != null, nameof(disk));
var vmDisks = client.SafeInvokeItems("vm-disk-list", $"vm={virtualMachine.Uuid}").Items;
var diskIndex = vmDisks.Count(disk => disk.TryGetValue("userdevice", out var device)); // Count only VDB (virtual block devices)
var extraSR = client.Repository.Find(name: disk.StorageRepository, mustExist: true);
// Create the disk.
client.SafeInvoke("vm-disk-add", $"uuid={virtualMachine.Uuid}", $"sr-uuid={extraSR.Uuid}", $"disk-size={disk.Size}", $"device={diskIndex}");
// Set the disk's name and description.
vmDisks = client.SafeInvokeItems("vm-disk-list", $"vm={virtualMachine.Uuid}").Items;
var vdi = vmDisks.FirstOrDefault(properties => properties.ContainsKey("name-label") && properties["name-label"] == "Created by xe");
if (vdi == null)
{
throw new XenException($"Cannot locate the new node [{disk.Name}] disk.");
}
var vdiUuid = vdi["uuid"];
var diskName = disk.Name ?? "disk";
var diskDescription = disk.Description ?? string.Empty;
client.SafeInvoke("vdi-param-set", $"uuid={vdiUuid}", $"name-label={diskName}", $"name-description={diskDescription}");
}
/// <summary>
/// Starts a stopped virtual machine resumes a suspended or paused virtual machine.
/// This does nothing when the virtual machine is already running.
/// </summary>
/// <param name="virtualMachine">The target virtual machine.</param>
/// <exception cref="XenException">Thrown if the operation failed.</exception>
public void Start(XenVirtualMachine virtualMachine)
{
Covenant.Requires <ArgumentNullException>(virtualMachine != null, nameof(virtualMachine));
var vm = Find(uuid: virtualMachine.Uuid);
if (vm == null)
{
throw new XenException($"Virtual machine not found: {virtualMachine.NameLabel}");
}
switch (vm.PowerState)
{
case XenVmPowerState.Running:
return;
case XenVmPowerState.Halted:
client.SafeInvoke("vm-start", $"uuid={virtualMachine.Uuid}");
break;
case XenVmPowerState.Paused:
client.SafeInvoke("vm-resume", $"uuid={virtualMachine.Uuid}");
break;
default:
case XenVmPowerState.Unknown:
throw new XenException($"Unexpected virtual machine power state: {virtualMachine.NameLabel}:{vm.PowerState}");
}
}
/// <summary>
/// Returns the number of disks attached to a virtual machine.
/// </summary>
/// <param name="virtualMachine">The target virtual machine.</param>
/// <returns>The number of attached disks.</returns>
public int DiskCount(XenVirtualMachine virtualMachine)
{
Covenant.Requires <ArgumentNullException>(virtualMachine != null, nameof(virtualMachine));
var vmDisks = client.SafeInvokeItems("vm-disk-list", $"vm={virtualMachine.Uuid}").Items;
// Count only VDB (virtual block devices) so we don't double count any disks.
return(vmDisks.Count(disk => disk.TryGetValue("userdevice", out var device)));
}
/// <summary>
/// Reboots a virtual machine.
/// </summary>
/// <param name="virtualMachine">The target virtual machine.</param>
/// <param name="force">Optionally forces the virtual machine to reboot.</param>
/// <exception cref="XenException">Thrown if the operation failed.</exception>
public void Reboot(XenVirtualMachine virtualMachine, bool force = false)
{
Covenant.Requires <ArgumentNullException>(virtualMachine != null, nameof(virtualMachine));
if (force)
{
client.SafeInvoke("vm-reboot", $"uuid={virtualMachine.Uuid}", "--force");
}
else
{
client.SafeInvoke("vm-reboot", $"uuid={virtualMachine.Uuid}");
}
}
/// <summary>
/// Shuts down a virtual machine.
/// </summary>
/// <param name="virtualMachine">The target virtual machine.</param>
/// <param name="turnOff">
/// <para>
/// Optionally just turns the VM off without performing a graceful shutdown first.
/// </para>
/// <note>
/// <b>WARNING!</b> This could result in the loss of unsaved data.
/// </note>
/// </param>
/// <exception cref="XenException">Thrown if the operation failed.</exception>
public void Shutdown(XenVirtualMachine virtualMachine, bool turnOff = false)
{
Covenant.Requires <ArgumentNullException>(virtualMachine != null, nameof(virtualMachine));
if (turnOff)
{
client.SafeInvoke("vm-shutdown", $"uuid={virtualMachine.Uuid}", "--force");
}
else
{
client.SafeInvoke("vm-shutdown", $"uuid={virtualMachine.Uuid}");
}
}
/// <summary>
/// Removes a virtual machine and its drives.
/// </summary>
/// <param name="virtualMachine">The target virtual machine.</param>
/// <param name="keepDrives">Optionally retains the VM disks.</param>
public void Remove(XenVirtualMachine virtualMachine, bool keepDrives = false)
{
Covenant.Requires <ArgumentNullException>(virtualMachine != null, nameof(virtualMachine));
// Power down the VM and the remove it.
client.SafeInvoke("vm-reset-powerstate", $"uuid={virtualMachine.Uuid}", "--force");
if (keepDrives)
{
client.SafeInvoke("vm-destroy", $"uuid={virtualMachine.Uuid}", "--force");
}
else
{
client.SafeInvoke("vm-uninstall", $"uuid={virtualMachine.Uuid}", "--force");
}
}
/// <summary>
/// Suspends a virtual machine by persisting its memory to disk and stopping
/// the virtual machine so that it can be restarted where it left off later.
/// </summary>
/// <param name="virtualMachine">The target virtual machine.</param>
/// <exception cref="XenException">Thrown if the operation failed.</exception>
public void Suspend(XenVirtualMachine virtualMachine)
{
Covenant.Requires <ArgumentNullException>(virtualMachine != null, nameof(virtualMachine));
client.SafeInvoke("vm-suspend", $"uuid={virtualMachine.Uuid}", "--force");
}