xenadmin/XenAdmin/Wizards/PatchingWizard/PatchingWizard_AutomatedUpdatesPage.cs
Konstantina Chremmou b0cdc74188 The code in the BackgroundWorker's ProgressChanged and RunWorkerCompleted event handlers does not need invoking as it's already on the UI thread.
Also, some logic simplification.

Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
2018-05-29 13:50:46 +01:00

590 lines
22 KiB
C#

/* Copyright (c) Citrix Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* * Redistributions of source code must retain the above
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* following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Reflection;
using System.Threading;
using log4net;
using XenAdmin.Controls;
using XenAdmin.Diagnostics.Problems;
using XenAdmin.Wizards.PatchingWizard.PlanActions;
using XenAPI;
using System.Linq;
using XenAdmin.Core;
using System.Text;
using System.Diagnostics;
using XenAdmin.Alerts;
namespace XenAdmin.Wizards.PatchingWizard
{
public partial class PatchingWizard_AutomatedUpdatesPage : XenTabPage
{
protected static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private bool _thisPageIsCompleted = false;
public List<Problem> ProblemsResolvedPreCheck { private get; set; }
public List<Pool> SelectedPools { private get; set; }
public XenServerPatchAlert UpdateAlert { private get; set; }
public WizardMode WizardMode { private get; set; }
public bool ApplyUpdatesToNewVersion { private get; set; }
private List<PoolPatchMapping> patchMappings = new List<PoolPatchMapping>();
public Dictionary<XenServerPatch, string> AllDownloadedPatches = new Dictionary<XenServerPatch, string>();
public KeyValuePair<XenServerPatch, string> PatchFromDisk { private get; set; }
private List<UpdateProgressBackgroundWorker> backgroundWorkers = new List<UpdateProgressBackgroundWorker>();
public PatchingWizard_AutomatedUpdatesPage()
{
InitializeComponent();
}
public override string Text
{
get
{
return Messages.PATCHINGWIZARD_AUTOUPDATINGPAGE_TEXT;
}
}
public override string PageTitle
{
get
{
return Messages.PATCHINGWIZARD_AUTOUPDATINGPAGE_TITLE;
}
}
public override string HelpID
{
get { return ""; }
}
public override bool EnablePrevious()
{
return false;
}
private bool _nextEnabled;
public override bool EnableNext()
{
return _nextEnabled;
}
private bool _cancelEnabled = true;
public override bool EnableCancel()
{
return _cancelEnabled;
}
public override void PageCancelled()
{
if (!_thisPageIsCompleted)
{
backgroundWorkers.ForEach(bgw => bgw.CancelAsync());
backgroundWorkers.Clear();
}
base.PageCancelled();
}
protected override void PageLoadedCore(PageLoadedDirection direction)
{
if (_thisPageIsCompleted)
{
return;
}
Debug.Assert(WizardMode == WizardMode.AutomatedUpdates || WizardMode == WizardMode.NewVersion && UpdateAlert != null);
if (WizardMode == WizardMode.AutomatedUpdates)
{
labelTitle.Text = Messages.PATCHINGWIZARD_UPLOAD_AND_INSTALL_TITLE_AUTOMATED_MODE;
}
else if (WizardMode == WizardMode.NewVersion)
{
labelTitle.Text = Messages.PATCHINGWIZARD_UPLOAD_AND_INSTALL_TITLE_NEW_VERSION_AUTOMATED_MODE;
}
foreach (var pool in SelectedPools)
{
var master = Helpers.GetMaster(pool.Connection);
var planActions = new List<PlanAction>();
var delayedActionsByHost = new Dictionary<Host, List<PlanAction>>();
var finalActions = new List<PlanAction>();
foreach (var host in pool.Connection.Cache.Hosts)
{
delayedActionsByHost.Add(host, new List<PlanAction>());
}
var hosts = pool.Connection.Cache.Hosts;
//if any host is not licensed for automated updates
bool automatedUpdatesRestricted = pool.Connection.Cache.Hosts.Any(Host.RestrictBatchHotfixApply);
var us = WizardMode == WizardMode.NewVersion
? Updates.GetUpgradeSequence(pool.Connection, UpdateAlert, ApplyUpdatesToNewVersion && !automatedUpdatesRestricted)
: Updates.GetUpgradeSequence(pool.Connection);
Debug.Assert(us != null, "Update sequence should not be null.");
if (us != null)
{
foreach (var patch in us.UniquePatches)
{
var hostsToApply = us.Where(u => u.Value.Contains(patch)).Select(u => u.Key).ToList();
hostsToApply.Sort();
planActions.Add(new DownloadPatchPlanAction(master.Connection, patch, AllDownloadedPatches, PatchFromDisk));
planActions.Add(new UploadPatchToMasterPlanAction(master.Connection, patch, patchMappings, AllDownloadedPatches, PatchFromDisk));
planActions.Add(new PatchPrechecksOnMultipleHostsInAPoolPlanAction(master.Connection, patch, hostsToApply, patchMappings));
foreach (var host in hostsToApply)
{
planActions.Add(new ApplyXenServerPatchPlanAction(host, patch, patchMappings));
if (patch.GuidanceMandatory)
{
var action = patch.after_apply_guidance == after_apply_guidance.restartXAPI &&
delayedActionsByHost[host].Any(a => a is RestartHostPlanAction)
? new RestartHostPlanAction(host, host.GetRunningVMs(), restartAgentFallback:true)
: GetAfterApplyGuidanceAction(host, patch.after_apply_guidance);
if (action != null)
{
planActions.Add(action);
// remove all delayed actions of the same kind that has already been added
// (because this action is guidance-mandatory=true, therefore
// it will run immediately, making delayed ones obsolete)
delayedActionsByHost[host].RemoveAll(a => action.GetType() == a.GetType());
}
}
else
{
var action = GetAfterApplyGuidanceAction(host, patch.after_apply_guidance);
// add the action if it's not already in the list
if (action != null && delayedActionsByHost[host].All(a => a.GetType() != action.GetType()))
delayedActionsByHost[host].Add(action);
}
}
//clean up master at the end:
planActions.Add(new RemoveUpdateFileFromMasterPlanAction(master, patchMappings, patch));
}//patch
}
//add a revert pre-check action for this pool
var problemsToRevert = ProblemsResolvedPreCheck.Where(p => hosts.ToList().Select(h => h.uuid).ToList().Contains(p.Check.Host.uuid)).ToList();
if (problemsToRevert.Count > 0)
{
finalActions.Add(new UnwindProblemsAction(problemsToRevert, string.Format(Messages.REVERTING_RESOLVED_PRECHECKS_POOL, pool.Connection.Name)));
}
if (planActions.Count > 0)
{
var bgw = new UpdateProgressBackgroundWorker(planActions, delayedActionsByHost, finalActions);
backgroundWorkers.Add(bgw);
}
} //foreach in SelectedMasters
foreach (var bgw in backgroundWorkers)
{
bgw.DoWork += WorkerDoWork;
bgw.WorkerReportsProgress = true;
bgw.ProgressChanged += WorkerProgressChanged;
bgw.RunWorkerCompleted += WorkerCompleted;
bgw.WorkerSupportsCancellation = true;
bgw.RunWorkerAsync();
}
if (backgroundWorkers.Count == 0)
{
_thisPageIsCompleted = true;
_nextEnabled = true;
OnPageUpdated();
}
}
#region automatic_mode
private List<PlanAction> doneActions = new List<PlanAction>();
private List<PlanAction> inProgressActions = new List<PlanAction>();
private List<PlanAction> errorActions = new List<PlanAction>();
private void WorkerProgressChanged(object sender, ProgressChangedEventArgs e)
{
var actionsWorker = sender as BackgroundWorker;
if (actionsWorker == null)
return;
if (!actionsWorker.CancellationPending)
{
PlanAction action = (PlanAction)e.UserState;
if (action != null)
{
if (e.ProgressPercentage == 0)
{
inProgressActions.Add(action);
}
else
{
doneActions.Add(action);
inProgressActions.Remove(action);
progressBar.Value += e.ProgressPercentage / backgroundWorkers.Count; //extend with error handling related numbers
}
}
UpdateStatusTextBox();
}
}
private void UpdateStatusTextBox()
{
var sb = new StringBuilder();
foreach (var pa in doneActions)
{
if (pa.Visible)
{
sb.Append(pa.ProgressDescription ?? pa.ToString());
sb.AppendLine(Messages.DONE);
}
}
foreach (var pa in errorActions)
{
sb.Append(pa.ProgressDescription ?? pa.ToString());
sb.AppendLine(Messages.ERROR);
}
foreach (var pa in inProgressActions)
{
if (pa.Visible)
{
sb.Append(pa.ProgressDescription ?? pa.ToString());
sb.AppendLine();
}
}
textBoxLog.Text = sb.ToString();
textBoxLog.SelectionStart = textBoxLog.Text.Length;
textBoxLog.ScrollToCaret();
}
private void WorkerDoWork(object sender, DoWorkEventArgs doWorkEventArgs)
{
var bgw = sender as UpdateProgressBackgroundWorker;
if (bgw == null)
return;
PlanAction action = null;
try
{
//running actions (non-delayed)
foreach (var a in bgw.PlanActions)
{
action = a;
if (bgw.CancellationPending)
{
doWorkEventArgs.Cancel = true;
return;
}
RunPlanAction(bgw, action);
}
// running delayed actions, but skipping the ones that should be skipped
// iterating through hosts, master first
var hostsOrdered = bgw.DelayedActionsByHost.Keys.ToList();
hostsOrdered.Sort(); //master first
foreach (var h in hostsOrdered)
{
var actions = bgw.DelayedActionsByHost[h];
var restartActions = actions.Where(a => a is RestartHostPlanAction).ToList();
//run all restart-alike plan actions
foreach (var a in restartActions)
{
action = a;
if (bgw.CancellationPending)
{
doWorkEventArgs.Cancel = true;
return;
}
RunPlanAction(bgw, action);
}
var otherActions = actions.Where(a => !(a is RestartHostPlanAction)).ToList();
//run the rest
foreach (var a in otherActions)
{
action = a;
if (bgw.CancellationPending)
{
doWorkEventArgs.Cancel = true;
return;
}
// any non-restart-alike delayed action needs to be run if:
// - this host is pre-Ely and there isn't any delayed restart plan action, or
// - this host is Ely or above and live patching must have succeeded or there isn't any delayed restart plan action
if (restartActions.Count <= 0 ||
(Helpers.ElyOrGreater(h) && h.Connection.TryResolveWithTimeout(new XenRef<Host>(h.opaque_ref)).updates_requiring_reboot.Count <= 0))
{
RunPlanAction(bgw, action);
}
else
{
//skip running it, but still need to report progress, mainly for the progress bar
action.Visible = false;
bgw.ReportProgress(100/bgw.ActionsCount, action);
}
}
}
//running final actions (eg. revert pre-checks)
foreach (var a in bgw.FinalActions)
{
action = a;
if (bgw.CancellationPending)
{
doWorkEventArgs.Cancel = true;
return;
}
RunPlanAction(bgw, action);
}
}
catch (Exception e)
{
errorActions.Add(action);
inProgressActions.Remove(action);
log.Error("Failed to carry out plan.", e);
log.Debug(action.Title);
doWorkEventArgs.Result = new Exception(action.Title, e);
//this pool failed, we will stop here, but try to remove update files at least
try
{
var positionOfFailedAction = bgw.PlanActions.IndexOf(action);
// can try to clean up the host after a failed PlanAction from bgw.PlanActions only
if (positionOfFailedAction != -1 && !(action is DownloadPatchPlanAction || action is UploadPatchToMasterPlanAction))
{
int pos = positionOfFailedAction;
if (!(bgw.PlanActions[pos] is RemoveUpdateFileFromMasterPlanAction)) //can't do anything if the remove action has failed
{
while (++pos < bgw.PlanActions.Count)
{
if (bgw.PlanActions[pos] is RemoveUpdateFileFromMasterPlanAction) //find the next remove
{
bgw.PlanActions[pos].Run();
break;
}
}
}
}
}
catch (Exception ex2)
{
//already in an error case - best effort
log.Error("Failed to clean up (this was a best effort attempt)", ex2);
}
bgw.ReportProgress(0);
}
}
private void RunPlanAction(UpdateProgressBackgroundWorker bgw, PlanAction action)
{
action.OnProgressChange += action_OnProgressChange;
bgw.ReportProgress(0, action);
action.Run();
Thread.Sleep(1000);
action.OnProgressChange -= action_OnProgressChange;
bgw.ReportProgress(100/bgw.ActionsCount, action);
}
private void action_OnProgressChange(object sender, EventArgs e)
{
Program.Invoke(Program.MainWindow, UpdateStatusTextBox);
}
private void WorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
var bgw = (UpdateProgressBackgroundWorker)sender;
if (!e.Cancelled)
{
Exception exception = e.Result as Exception;
if (exception != null)
{
//not showing exceptions in the meantime
}
//if all finished
if (backgroundWorkers.All(w => !w.IsBusy))
{
AllWorkersFinished();
ShowErrors();
_thisPageIsCompleted = true;
_cancelEnabled = false;
_nextEnabled = true;
}
}
OnPageUpdated();
}
private PlanAction GetAfterApplyGuidanceAction(Host host, after_apply_guidance guidance)
{
switch (guidance)
{
case after_apply_guidance.restartHost:
return new RestartHostPlanAction(host, host.GetRunningVMs());
case after_apply_guidance.restartXAPI:
return new RestartAgentPlanAction(host);
case after_apply_guidance.restartHVM:
return new RebootVMsPlanAction(host, host.GetRunningHvmVMs());
case after_apply_guidance.restartPV:
return new RebootVMsPlanAction(host, host.GetRunningPvVMs());
default:
return null;
}
}
#endregion
private void ShowErrors()
{
if (ErrorMessages != null)
{
labelTitle.Text = Messages.PATCHINGWIZARD_AUTOUPDATINGPAGE_FAILED;
labelError.Text = Messages.PATCHINGWIZARD_AUTOUPDATINGPAGE_ERROR;
textBoxLog.Text += ErrorMessages;
log.ErrorFormat("Error message displayed: {0}", labelError.Text);
pictureBox1.Image = SystemIcons.Error.ToBitmap();
panel1.Visible = true;
}
}
private string ErrorMessages
{
get
{
if (errorActions.Count == 0)
return null;
var sb = new StringBuilder();
sb.AppendLine();
sb.AppendLine(errorActions.Count > 1 ? Messages.PATCHINGWIZARD_AUTOUPDATINGPAGE_ERRORS_OCCURRED : Messages.PATCHINGWIZARD_AUTOUPDATINGPAGE_ERROR_OCCURRED);
foreach (var action in errorActions)
{
var exception = action.Error;
if (exception == null)
{
log.ErrorFormat("An action has failed with an empty exception. Action: {0}", action.ToString());
continue;
}
log.Error(exception);
var innerEx = exception.InnerException as Failure;
if (innerEx != null)
{
log.Error(innerEx);
sb.AppendLine(innerEx.Message);
}
else
{
sb.AppendLine(exception.Message);
}
}
return sb.ToString();
}
}
private void AllWorkersFinished()
{
if (WizardMode == WizardMode.AutomatedUpdates)
{
labelTitle.Text = Messages.PATCHINGWIZARD_UPDATES_DONE_AUTOMATED_UPDATES_MODE;
}
else if (WizardMode == WizardMode.NewVersion)
{
labelTitle.Text = Messages.PATCHINGWIZARD_UPDATES_DONE_AUTOMATED_NEW_VERSION_MODE;
}
progressBar.Value = 100;
pictureBox1.Image = null;
labelError.Text = Messages.CLOSE_WIZARD_CLICK_FINISH;
}
}
}