mirror of
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347 lines
15 KiB
C#
347 lines
15 KiB
C#
/* Copyright (c) Cloud Software Group, Inc.
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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.Linq;
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using System.Threading;
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using XenAPI;
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using XenAdmin.Core;
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namespace XenAdmin.Actions.GUIActions
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{
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/// <summary>
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/// A "meddling" Action is one being performed by someone else; in other words,
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/// they are ones that we've inferred by the presence of task instances on the pool.
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/// </summary>
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public class MeddlingAction : CancellingAction
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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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/// Heuristic to determine whether a new task was created by a client
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/// aware of our task.AppliesTo scheme, or by some other client.
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/// </summary>
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private static readonly TimeSpan awareClientHeuristic = TimeSpan.FromSeconds(5);
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private static readonly string XapiExportTaskPrefix = "Export of VM: ";
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private static readonly string XapiImportTaskName = "VM import";
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private static readonly List<vm_operations> RecognisedVmOperations = new List<vm_operations>
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{
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vm_operations.clean_reboot,
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vm_operations.clean_shutdown,
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vm_operations.clone,
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vm_operations.hard_reboot,
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vm_operations.hard_shutdown,
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vm_operations.migrate_send,
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vm_operations.pool_migrate,
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vm_operations.resume,
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vm_operations.resume_on,
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vm_operations.start,
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vm_operations.start_on,
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vm_operations.suspend,
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vm_operations.checkpoint,
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vm_operations.snapshot,
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vm_operations.export,
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vm_operations.import
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};
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private vm_operations vmOperation;
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public MeddlingAction(Task task)
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: base(task.Name(), task.Description(), false)
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{
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RelatedTask = new XenRef<Task>(task.opaque_ref);
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Host = task.Connection.Resolve(task.resident_on) ?? Helpers.GetCoordinator(task.Connection);
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Started = (task.created + task.Connection.ServerTimeOffset).ToLocalTime();
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SetAppliesToData(task);
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Connection = task.Connection;
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VM = GetVm(task);
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vmOperation = GetVmOperation(task);
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UpdateActionTitleAndDescription(task);
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Update(task, false);
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}
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public void Update(Task task, bool deleting)
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{
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ThreadPool.QueueUserWorkItem(delegate
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{
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if (!deleting)
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{
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RecomputeCanCancel();
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}
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if (task == null || IsCompleted)
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return;
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log.DebugFormat("Updating task {0} : {1} - {2}", task.opaque_ref,
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task.created, task.finished);
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int percentComplete = task.progress < 0 ? 0 : (int) (100.0*task.progress);
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if (PercentComplete < percentComplete)
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PercentComplete = percentComplete;
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SetFatalErrorData(task);
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DetermineIfTaskIsComplete(task, deleting);
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if (IsCompleted)
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Description = Messages.COMPLETED;
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DestroyUnwantedOperations(task);
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if (deleting)
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LogoutCancelSession();
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});
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}
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private void DetermineIfTaskIsComplete(Task task, bool deleting)
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{
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if (task.finished.Year > 1970)
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{
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DateTime t = task.finished + task.Connection.ServerTimeOffset;
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Finished = t.ToLocalTime();
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IsCompleted = true;
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}
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else if (deleting)
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{
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Finished = DateTime.Now;
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IsCompleted = true;
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}
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else
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{
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StartedRunning = true;
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}
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}
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private void SetFatalErrorData(Task task)
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{
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string[] err = task.error_info;
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if (err != null && err.Length > 0)
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Exception = new Failure(err);
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else if (task.status == task_status_type.cancelled)
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Exception = new CancelledException();
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}
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private void SetAppliesToData(Task task)
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{
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List<string> applies_to = task.AppliesTo();
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if (applies_to != null)
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{
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AppliesTo.AddRange(applies_to);
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}
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else
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{
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// A non-aware client has created this task. We'll create a new action for this, and place it under
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// the task.resident_on host, or if that doesn't resolve, the pool coordinator.
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Host host = task.Connection.Resolve(task.resident_on) ?? Helpers.GetCoordinator(task.Connection);
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if (host != null)
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AppliesTo.Add(host.opaque_ref);
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}
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}
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private VM GetVm(Task task)
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{
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// try to find the VM in AppliesTo
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foreach (string r in AppliesTo)
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{
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VM vm = task.Connection.Resolve(new XenRef<VM>(r));
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if (vm != null)
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return vm;
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}
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// try to find a VM in the cache which has this task in its current_operations
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return task.Connection.Cache.VMs.FirstOrDefault(vm => vm.current_operations.Keys.Contains(task.opaque_ref));
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}
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private static vm_operations GetVmOperation(Task task)
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{
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string nl = task.name_label.Replace("Async.", "");
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if (nl.StartsWith("VM."))
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{
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nl = nl.Replace("VM.", "");
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if (Enum.TryParse(nl, out vm_operations vmOperation) && RecognisedVmOperations.Contains(vmOperation))
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{
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return vmOperation;
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}
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}
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else
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{
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// other tasks, e.g. export, import
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if (task.name_label == XapiImportTaskName)
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return vm_operations.import;
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if (task.name_label.StartsWith(XapiExportTaskPrefix))
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return vm_operations.export;
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}
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return vm_operations.unknown;
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}
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private void UpdateActionTitleAndDescription(Task task)
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{
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Host host1 = null;
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Host host2 = null;
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var appliesTo = task.AppliesTo();
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if (appliesTo != null)
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{
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foreach (string r in appliesTo)
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{
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var host = Connection.Resolve(new XenRef<Host>(r));
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if (host == null)
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continue;
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if (host1 == null)
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host1 = host;
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else
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host2 = host;
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}
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}
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else
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{
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host1 = task.Connection.Resolve(task.resident_on) ?? Helpers.GetCoordinator(task.Connection);
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}
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List<string> names = new List<string>();
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if (VM != null)
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names.Add(VM.name_label);
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if (host1 != null)
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names.Add(host1.name_label);
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if (host2 != null)
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names.Add(host2.name_label);
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string titleFormat;
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switch (vmOperation)
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{
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case vm_operations.clean_reboot:
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case vm_operations.hard_reboot:
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titleFormat = names.Count > 1 ? Messages.ACTION_VM_REBOOTING_ON_TITLE : Messages.ACTION_VM_REBOOTING_TITLE;
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Description = Messages.ACTION_VM_REBOOTING;
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break;
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case vm_operations.clean_shutdown:
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case vm_operations.hard_shutdown:
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titleFormat = names.Count > 1 ? Messages.ACTION_VM_SHUTTING_DOWN_ON_TITLE : Messages.ACTION_VM_SHUTTING_DOWN_TITLE;
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Description = Messages.ACTION_VM_SHUTTING_DOWN;
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break;
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case vm_operations.clone:
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titleFormat = Messages.ACTION_VM_COPYING_TITLE_MEDDLING;
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Description = Messages.ACTION_VM_COPYING;
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break;
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case vm_operations.migrate_send:
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case vm_operations.pool_migrate:
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titleFormat = names.Count > 2 ? Messages.ACTION_VM_MIGRATING_RESIDENT : Messages.ACTION_VM_MIGRATING_TITLE;
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Description = Messages.ACTION_VM_MIGRATING;
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break;
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case vm_operations.resume:
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case vm_operations.resume_on:
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titleFormat = names.Count > 1 ? Messages.ACTION_VM_RESUMING_ON_TITLE : Messages.ACTION_VM_RESUMING_TITLE;
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Description = Messages.ACTION_VM_RESUMING;
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break;
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case vm_operations.start:
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case vm_operations.start_on:
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titleFormat = names.Count > 1 ? Messages.ACTION_VM_STARTING_ON_TITLE : Messages.ACTION_VM_STARTING_TITLE;
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Description = Messages.ACTION_VM_STARTING;
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break;
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case vm_operations.suspend:
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titleFormat =Messages.ACTION_VM_SUSPENDING_TITLE;
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Description = Messages.ACTION_VM_SUSPENDING;
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break;
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case vm_operations.checkpoint:
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case vm_operations.snapshot:
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titleFormat = Messages.ACTION_VM_SNAPSHOT_TITLE;
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Description = Messages.SNAPSHOTTING;
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break;
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case vm_operations.export:
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titleFormat = Messages.ACTION_EXPORT_TASK_NAME;
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Description = Messages.ACTION_EXPORT_DESCRIPTION_IN_PROGRESS;
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break;
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case vm_operations.import:
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titleFormat = VM == null ? Messages.IMPORTING : names.Count > 1
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? Messages.ACTION_IMPORT_VM_TO_HOST_TITLE
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: Messages.ACTION_IMPORT_VM_TITLE;
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Description = Messages.IMPORTING;
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break;
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default:
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titleFormat = task.name_label;
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Description = task.name_description;
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break;
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}
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try
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{
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Title = string.Format(titleFormat, names.ToArray());
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}
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catch (Exception e)
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{
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log.Error(e.Message);
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Title = Description ?? task.name_label;
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}
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}
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/// <summary>
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/// This is one of our tasks, or it's a sub-task of something else, or it corresponds
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/// to an operation we don't care to recognize. We're going to do no more with it.
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/// </summary>
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public static bool IsTaskUnwanted(Task task)
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{
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return task.GetXenCenterUUID() == Program.XenCenterUUID ||
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task.Connection.Resolve(task.subtask_of) != null ||
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GetVmOperation(task) == vm_operations.unknown;
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}
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/// <summary>
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/// Decides whether a MeddlingAction can be created for a given task.
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/// If AppliesTo is set, then the client that created this task knows about our scheme for passing
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/// info between clients.
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/// Otherwise, we give the client a window (awareClientHeuristic) to set this field before we decide
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/// that it's a non-aware client.
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/// </summary>
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public static bool IsTaskSuitable(Task task)
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{
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return task.AppliesTo() != null ||
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task.created + task.Connection.ServerTimeOffset < DateTime.UtcNow - awareClientHeuristic;
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}
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private void DestroyUnwantedOperations(Task task)
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{
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string[] err = task.error_info;
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if (task.Name() == "SR.create" && err != null && err.Length > 0 && err[0] == Failure.SR_BACKEND_FAILURE_107)
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{
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// This isn't an SR create at all, it is a scan for LUNs. Hide it, since the 'error' info contains loads of XML,
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// and is not useful. We don't know this until the error occurs though. Destroy the MeddlingAction.
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task.PropertyChanged -= MeddlingActionManager.Task_PropertyChanged;
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ConnectionsManager.History.Remove(this);
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}
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}
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}
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}
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