mirror of
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337 lines
14 KiB
C#
337 lines
14 KiB
C#
/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Threading;
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using System.Windows.Forms;
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using XenAdmin.Actions;
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using XenAdmin.Core;
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using XenAdmin.Dialogs;
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using XenAdmin.Network;
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using XenAPI;
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using XenAdmin.Actions.VMActions;
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namespace XenAdmin.Commands
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{
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/// <summary>
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/// This is the base Command for the start-on, resume-on and migrate Commands.
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/// </summary>
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internal abstract class VMOperationCommand : Command
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{
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private readonly vm_operations _operation;
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public VMOperationCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection, vm_operations operation)
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: base(mainWindow, selection)
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{
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_operation = operation;
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AssertOperationIsSupported();
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}
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public VMOperationCommand(IMainWindow mainWindow, IEnumerable<SelectedItem> selection)
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: base(mainWindow, selection)
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{
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_operation = vm_operations.unknown;
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}
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private void AssertOperationIsSupported()
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{
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if (_operation != vm_operations.start_on &&
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_operation != vm_operations.resume_on &&
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_operation != vm_operations.pool_migrate)
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{
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throw new NotSupportedException("Invalid operation, not supported");
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}
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}
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public virtual Image SecondImage
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{
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get
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{
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return null;
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}
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}
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public virtual double StarRating
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{
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get
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{
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return 0;
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}
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}
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protected vm_operations Operation
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{
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get
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{
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return _operation;
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}
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}
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/// <summary>
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/// Gets the host which should be used for the start-on, resume-on or migrate for the specified VM.
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/// </summary>
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protected abstract Host GetHost(VM vm);
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protected sealed override bool CanExecuteCore(SelectedItemCollection selection)
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{
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return selection.AllItemsAre<VM>() && selection.AtLeastOneXenObjectCan<VM>(CanExecute);
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}
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/// <summary>
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/// Determines whether the specified VM can be executed (i.e. resumed-on, started-on or migrated.)
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/// </summary>
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protected abstract bool CanExecute(VM vm);
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protected override void ExecuteCore(SelectedItemCollection selection)
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{
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AssertOperationAllowsExecution();
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string title = Messages.ACTION_VMS_RESUMING_ON_TITLE;
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string startDescription = Messages.ACTION_VM_RESUMING;
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string endDescription = Messages.ACTION_VM_RESUMED;
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List<AsyncAction> actions = new List<AsyncAction>();
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if (_operation == vm_operations.pool_migrate)
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{
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title = Messages.ACTION_VMS_MIGRATING_TITLE;
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startDescription = Messages.ACTION_VM_MIGRATING;
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endDescription = Messages.ACTION_VM_MIGRATED;
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foreach (VM vm in selection.AsXenObjects<VM>(CanExecute))
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{
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this.MainWindowCommandInterface.CloseActiveWizards(vm);
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Host host = GetHost(vm);
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actions.Add(new VMMigrateAction(vm, host));
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}
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}
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else if (_operation == vm_operations.start_on)
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{
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title = Messages.ACTION_VMS_STARTING_ON_TITLE;
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startDescription = Messages.ACTION_VM_STARTING;
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endDescription = Messages.ACTION_VM_STARTED;
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foreach (VM vm in selection.AsXenObjects<VM>(CanExecute))
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{
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Host host = GetHost(vm);
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actions.Add(new VMStartOnAction(vm, host,WarningDialogHAInvalidConfig, StartDiagnosisForm));
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}
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}
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else if (_operation == vm_operations.resume_on)
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{
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title = Messages.ACTION_VMS_RESUMING_ON_TITLE;
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startDescription = Messages.ACTION_VM_RESUMING;
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endDescription = Messages.ACTION_VM_RESUMED;
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foreach (VM vm in selection.AsXenObjects<VM>(CanExecute))
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{
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Host host = GetHost(vm);
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actions.Add(new VMResumeOnAction(vm, host, WarningDialogHAInvalidConfig, StartDiagnosisForm));
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}
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}
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RunMultipleActions(actions, title, startDescription, endDescription, true);
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}
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private void AssertOperationAllowsExecution()
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{
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if(_operation == vm_operations.unknown)
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throw new NotSupportedException("VM operation unknown is not supported");
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}
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protected string ErrorDialogTitle
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{
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get
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{
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if (_operation == vm_operations.pool_migrate)
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{
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return Messages.ERROR_DIALOG_MIGRATE_TITLE;
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}
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else if (_operation == vm_operations.start_on)
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{
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return Messages.ERROR_DIALOG_START_ON_TITLE;
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}
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return Messages.ERROR_DIALOG_RESUME_ON_TITLE;
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}
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}
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protected string ErrorDialogText
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{
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get
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{
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if (_operation == vm_operations.pool_migrate)
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{
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return Messages.ERROR_DIALOG_MIGRATE_TEXT;
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}
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else if (_operation == vm_operations.start_on)
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{
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return Messages.ERROR_DIALOG_START_ON_TEXT;
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}
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return Messages.ERROR_DIALOG_RESUME_ON_TEXT;
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}
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}
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public static void WarningDialogHAInvalidConfig(VM vm, bool isStart)
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{
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Program.Invoke(Program.MainWindow, () =>
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{
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if (
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new ThreeButtonDialog(
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new ThreeButtonDialog.Details(SystemIcons.Warning,
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String.Format(
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isStart
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? Messages.
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HA_INVALID_CONFIG_START
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: Messages.
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HA_INVALID_CONFIG_RESUME,
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Helpers.GetName(vm).Ellipsise(500)),
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Messages.HIGH_AVAILABILITY),
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ThreeButtonDialog.ButtonOK,
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ThreeButtonDialog.ButtonCancel).ShowDialog(
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Program.MainWindow) == DialogResult.Cancel)
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{
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throw new CancelledException();
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}
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});
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}
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public static void StartDiagnosisForm(VM vm)
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{
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ThreadPool.QueueUserWorkItem(delegate
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{
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string title = Messages.ERROR_DIALOG_START_VM_TITLE;
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string text = string.Format(Messages.ERROR_DIALOG_START_VM_TEXT, vm);
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if (Win32Window.GetWindowWithText(title) != null)
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{
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// don't bother showing this if there's one already up.
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return;
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}
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IXenConnection connection = vm.Connection;
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Session session = connection.DuplicateSession();
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if (session != null)
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{
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Dictionary<Host, string> reasons = new Dictionary<Host, string>();
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foreach (Host host in connection.Cache.Hosts)
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{
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reasons[host] = string.Empty;
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try
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{
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VM.assert_can_boot_here(session, vm.opaque_ref, host.opaque_ref);
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}
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catch (Failure failure)
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{
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reasons[host] = failure.Message;
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}
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}
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Program.Invoke(Program.MainWindow, () => CommandErrorDialog.Create<Host>(title, text, reasons).ShowDialog(Program.MainWindow));
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}
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});
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}
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private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
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/// <summary>
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/// In the case there being nowhere to start/resume the VM (NO_HOSTS_AVAILABLE), shows the reason why the VM could not be started
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/// on each host. If the start failed due to HA_OPERATION_WOULD_BREAK_FAILOVER_PLAN, offers to decrement ntol and try the operation
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/// again.
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/// </summary>
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/// <param name="vm"></param>
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/// <param name="f"></param>
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/// <param name="kind">The kind of the operation that failed. Must be one of Start/StartOn/Resume/ResumeOn.</param>
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public static void StartDiagnosisForm(VMStartAbstractAction VMStartAction , Failure failure)
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{
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if (failure.ErrorDescription[0] == Failure.NO_HOSTS_AVAILABLE)
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{
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// Show a dialog displaying why the VM couldn't be started on each host
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StartDiagnosisForm(VMStartAction.VM);
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}
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else if (failure.ErrorDescription[0] == Failure.HA_OPERATION_WOULD_BREAK_FAILOVER_PLAN)
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{
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// The action was blocked by HA because it would reduce the number of tolerable server failures.
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// With the user's consent, we'll reduce the number of configured failures to tolerate and try again.
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Pool pool = Helpers.GetPool(VMStartAction.VM.Connection);
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if (pool == null)
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{
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log.ErrorFormat("Could not get pool for VM {0} in StartDiagnosisForm()", Helpers.GetName(VMStartAction.VM));
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return;
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}
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long ntol = pool.ha_host_failures_to_tolerate;
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long newNtol = Math.Min(pool.ha_plan_exists_for - 1, ntol - 1);
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if (newNtol <= 0)
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{
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// We would need to basically turn HA off to start this VM
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string msg = String.Format(VMStartAction.IsStart ? Messages.HA_VM_START_NTOL_ZERO : Messages.HA_VM_RESUME_NTOL_ZERO,
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Helpers.GetName(pool).Ellipsise(100),
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Helpers.GetName(VMStartAction.VM).Ellipsise(100));
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Program.Invoke(Program.MainWindow, delegate()
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{
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new ThreeButtonDialog(new ThreeButtonDialog.Details(SystemIcons.Warning, msg, Messages.HIGH_AVAILABILITY)).ShowDialog(Program.MainWindow);
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});
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}
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else
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{
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// Show 'reduce ntol?' dialog
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string msg = String.Format(VMStartAction.IsStart ? Messages.HA_VM_START_NTOL_DROP : Messages.HA_VM_RESUME_NTOL_DROP,
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Helpers.GetName(pool).Ellipsise(100), ntol,
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Helpers.GetName(VMStartAction.VM).Ellipsise(100), newNtol);
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Program.Invoke(Program.MainWindow, delegate()
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{
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DialogResult r = new ThreeButtonDialog(
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new ThreeButtonDialog.Details(SystemIcons.Warning, msg, Messages.HIGH_AVAILABILITY),
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ThreeButtonDialog.ButtonYes,
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new ThreeButtonDialog.TBDButton(Messages.NO_BUTTON_CAPTION, DialogResult.No, ThreeButtonDialog.ButtonType.CANCEL, true)).ShowDialog(Program.MainWindow);
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if (r == DialogResult.Yes)
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{
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DelegatedAsyncAction action = new DelegatedAsyncAction(VMStartAction.VM.Connection, Messages.HA_LOWERING_NTOL, null, null,
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delegate(Session session)
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{
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// Set new ntol, then retry action
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XenAPI.Pool.set_ha_host_failures_to_tolerate(session, pool.opaque_ref, newNtol);
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// ntol set succeeded, start new action
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VMStartAction.Clone().RunAsync();
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});
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action.RunAsync();
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}
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});
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}
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}
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}
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}
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}
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