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xenadmin/XenAdmin/TabPages/HAPage.cs
2016-10-13 16:16:16 +01:00

677 lines
27 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
* copyright notice, this list of conditions and the
* 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,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using XenAdmin.Actions;
using XenAdmin.Controls;
using XenAdmin.Core;
using XenAdmin.Dialogs;
using XenAdmin.Wizards;
using XenAPI;
namespace XenAdmin.TabPages
{
internal partial class HAPage : BaseTabPage
{
private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
private Pool pool;
private IXenObject xenObject;
private readonly CollectionChangeEventHandler Host_CollectionChangedWithInvoke;
/// <summary>
/// The object that the panel is displaying HA info for. Must be set on the event thread.
/// </summary>
public IXenObject XenObject
{
set
{
Program.AssertOnEventThread();
// Do nothing if value is being set to the same object again
if (value == xenObject)
{
Rebuild();
return;
}
if (xenObject != null)
{
if (xenObject is Pool)
{
pool.PropertyChanged -= pool_PropertyChanged;
foreach (Host slave in pool.Connection.Cache.Hosts)
{
slave.PropertyChanged -= host_PropertyChanged;
}
pool.Connection.Cache.DeregisterCollectionChanged<Host>(Host_CollectionChangedWithInvoke);
}
}
xenObject = value;
pool = null;
if (xenObject != null)
{
if (xenObject is Pool)
{
this.pool = (Pool)xenObject;
pool.PropertyChanged += pool_PropertyChanged;
foreach (Host slave in pool.Connection.Cache.Hosts)
{
slave.PropertyChanged += host_PropertyChanged;
}
pool.Connection.Cache.RegisterCollectionChanged<Host>(Host_CollectionChangedWithInvoke);
}
}
Rebuild();
}
}
public HAPage()
{
InitializeComponent();
customListPanel.ContextMenuRequest += GP_ContextShow;
Host_CollectionChangedWithInvoke = Program.ProgramInvokeHandler(Host_CollectionChanged);
ConnectionsManager.History.CollectionChanged += History_CollectionChanged;
base.Text = Messages.HIGH_AVAILABILITY;
pictureBoxWarningTriangle.Image = SystemIcons.Warning.ToBitmap();
}
private void History_CollectionChanged(object sender, CollectionChangeEventArgs e)
{
//Program.AssertOnEventThread();
Program.BeginInvoke(Program.MainWindow, () =>
{
if (e.Action == CollectionChangeAction.Add &&
(e.Element is EnableHAAction || e.Element is DisableHAAction))
{
AsyncAction action = (AsyncAction)e.Element;
action.Changed += action_Changed;
if (xenObject != null && xenObject.Connection == action.Connection)
Rebuild();
}
});
}
private void action_Changed(ActionBase sender)
{
// This seems to be called off the event thread
AsyncAction action = (AsyncAction)sender;
if (action.IsCompleted)
{
action.Changed -= action_Changed;
Program.Invoke(Program.MainWindow, delegate()
{
if (xenObject != null && xenObject.Connection == action.Connection)
{
Rebuild();
}
});
}
}
/// <summary>
/// Registered on the connection's Host collection when the HAPage is showing a pool.
/// Means we respond to hosts joining/leaving the pool.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Host_CollectionChanged(object sender, CollectionChangeEventArgs e)
{
switch (e.Action)
{
case CollectionChangeAction.Add:
((Host)e.Element).PropertyChanged += host_PropertyChanged;
break;
case CollectionChangeAction.Remove:
((Host)e.Element).PropertyChanged -= host_PropertyChanged;
break;
case CollectionChangeAction.Refresh:
// As of writing, ChangeableDictionary never raises this kind of event
throw new NotImplementedException();
}
}
/// <summary>
/// Rebuilds the panel contents. Must be called on the event thread.
/// </summary>
private void Rebuild()
{
Program.AssertOnEventThread();
if (!this.Visible)
return;
customListPanel.BeginUpdate();
try
{
customListPanel.ClearRows();
tableLatencies.Controls.Clear();
if (xenObject == null)
return;
AsyncAction action = HelpersGUI.FindActiveHaAction(xenObject.Connection);
if (action != null)
{
// There is an EnableHAAction or DisableHAAction in progress relating to this connection.
// Show some text and disable editing
buttonConfigure.Visible = true;
buttonConfigure.Enabled = false;
buttonEnableDisableHa.Visible = true;
buttonEnableDisableHa.Enabled = false;
pictureBoxWarningTriangle.Visible = false;
labelStatus.Text = String.Format(action is EnableHAAction ? Messages.HA_PAGE_ENABLING : Messages.HA_PAGE_DISABLING,
Helpers.GetName(xenObject.Connection));
}
else
{
// Generate the tab contents depending on what XenObject we're displaying
if (pool.ha_enabled)
{
buttonEnableDisableHa.Text = Messages.DISABLE_HA_ELLIPSIS;
if (PassedRbacChecks())
{
buttonConfigure.Visible = true;
buttonConfigure.Enabled = true;
buttonEnableDisableHa.Visible = true;
buttonEnableDisableHa.Enabled = true;
pictureBoxWarningTriangle.Visible = false;
labelStatus.Text = string.Format(Messages.HA_TAB_CONFIGURED_BLURB, Helpers.GetName(pool).Ellipsise(30));
}
else
{
buttonConfigure.Visible = false;
buttonConfigure.Enabled = false;
buttonEnableDisableHa.Visible = false;
buttonEnableDisableHa.Enabled = false;
pictureBoxWarningTriangle.Visible = true;
labelStatus.Text = String.Format(Messages.RBAC_HA_TAB_WARNING,
Role.FriendlyCSVRoleList(Role.ValidRoleList(HA_PERMISSION_CHECKS, pool.Connection)),
Role.FriendlyCSVRoleList(pool.Connection.Session.Roles));
}
}
else
{
buttonEnableDisableHa.Text = Messages.ENABLE_HA_ELLIPSIS;
buttonConfigure.Visible = true;
buttonConfigure.Enabled = true;
buttonEnableDisableHa.Visible = false;
buttonEnableDisableHa.Enabled = true;
pictureBoxWarningTriangle.Visible = false;
labelStatus.Text = String.Format(Messages.HAPANEL_BLURB, Helpers.GetName(pool).Ellipsise(30));
}
if (xenObject is SR)
{
// Currently unused
SR sr = (SR)xenObject;
generateSRHABox(sr);
}
else if (xenObject is Pool)
{
generatePoolHABox(pool);
tableLayoutPanel1.AutoScrollMinSize = new Size(0, tableLatencies.Height + customListPanel.Height);
}
}
}
finally
{
customListPanel.EndUpdate();
}
}
private RbacMethodList HA_PERMISSION_CHECKS = new RbacMethodList(
"pool.set_ha_host_failures_to_tolerate",
"pool.sync_database",
"vm.set_ha_restart_priority",
"pool.ha_compute_hypothetical_max_host_failures_to_tolerate"
);
private bool PassedRbacChecks()
{
return Role.CanPerform(HA_PERMISSION_CHECKS, pool.Connection);
}
private void pool_PropertyChanged(object sender1, PropertyChangedEventArgs e)
{
if (e.PropertyName == "ha_enabled" || e.PropertyName == "ha_host_failures_to_tolerate"
|| e.PropertyName == "ha_overcommitted" || e.PropertyName == "ha_plan_exists_for"
|| e.PropertyName == "name_label")
{
Rebuild();
}
}
private void host_PropertyChanged(object sender1, PropertyChangedEventArgs e)
{
if (e.PropertyName == "name_label" || e.PropertyName == "ha_statefiles"
|| e.PropertyName == "ha_network_peers")
{
Rebuild();
}
}
private string getPoolHAStatus(Pool pool)
{
return pool.ha_enabled ? Messages.YES : Messages.NO;
}
private void generatePoolHABox(Pool pool)
{
if (!pool.ha_enabled)
return;
// 'High Availability' heading
CustomListRow header = CreateHeader(Messages.HA_CONFIGURATION_TITLE);
customListPanel.AddRow(header);
AddRow(header, GetFriendlyName("pool.ha_enabled"), pool, getPoolHAStatus, false);
{
// ntol row. May be red and bold.
bool redBold = pool.ha_host_failures_to_tolerate == 0;
CustomListRow newChild = CreateNewRow(Messages.HA_CONFIGURED_CAPACITY, new ToStringWrapper<Pool>(pool, getNtol), redBold);
header.AddChild(newChild);
if (redBold)
{
newChild.Items[1].ForeColor = Color.Red;
ToolStripMenuItem editHa = new ToolStripMenuItem(Messages.CONFIGURE_HA_ELLIPSIS);
editHa.Click += delegate { EditHA(pool); };
newChild.MenuItems.Add(editHa);
newChild.DefaultMenuItem = editHa;
}
else
{
newChild.Items[1].ForeColor = BaseTabPage.ItemValueForeColor;
}
}
{
// plan_exists_for row needs some special work: the text may be red and bold
bool redBold = haStatusRed(pool);
CustomListRow newChild = CreateNewRow(Messages.HA_CURRENT_CAPACITY, new ToStringWrapper<Pool>(pool, getPlanExistsFor), redBold);
header.AddChild(newChild);
if (redBold)
{
newChild.Items[1].ForeColor = Color.Red;
ToolStripMenuItem editHa = new ToolStripMenuItem(Messages.CONFIGURE_HA_ELLIPSIS);
editHa.Click += delegate { EditHA(pool); };
newChild.MenuItems.Add(editHa);
newChild.DefaultMenuItem = editHa;
}
else
{
newChild.Items[1].ForeColor = BaseTabPage.ItemValueForeColor;
}
}
AddBottomSpacing(header);
// 'Heartbeating status' heading
header = CreateHeader(Messages.HEARTBEATING_STATUS);
customListPanel.AddRow(header);
// Now build the heartbeat target health table
List<SR> heartbeatSRs = pool.GetHAHeartbeatSRs();
// Sort heartbeat SRs using NaturalCompare
heartbeatSRs.Sort((Comparison<SR>)delegate(SR a, SR b)
{
return StringUtility.NaturalCompare(a.Name, b.Name);
});
List<Host> members = new List<Host>(pool.Connection.Cache.Hosts);
// Sort pool members using NaturalCompare
members.Sort((Comparison<Host>)delegate(Host a, Host b)
{
return StringUtility.NaturalCompare(a.Name, b.Name);
});
int numCols = 1 + 2 + (2 * heartbeatSRs.Count); // Hostnames col, then 2 each for each HB target (network + SRs)
int numRows = 1 + members.Count;
// Create rows and cols
tableLatencies.SuspendLayout();
tableLatencies.ColumnCount = numCols;
tableLatencies.ColumnStyles.Clear();
for (int i = 0; i < numCols; i++)
{
tableLatencies.ColumnStyles.Add(new ColumnStyle(SizeType.AutoSize));
}
tableLatencies.RowCount = numRows;
tableLatencies.RowStyles.Clear();
for (int i = 0; i < numRows; i++)
{
tableLatencies.RowStyles.Add(new RowStyle(SizeType.AutoSize));
}
{
// Network icon
PictureBox p = new PictureBox();
p.Image = Images.GetImage16For(Icons.Network);
p.SizeMode = PictureBoxSizeMode.AutoSize;
p.Padding = new Padding(0);
tableLatencies.Controls.Add(p);
tableLatencies.SetCellPosition(p, new TableLayoutPanelCellPosition(1, 0));
// Network text
Label l = new Label();
l.Padding = new Padding(0, 5, 5, 5);
l.Font = BaseTabPage.ItemLabelFont;
l.ForeColor = BaseTabPage.ItemLabelForeColor;
l.AutoSize = true;
l.Text = Messages.NETWORK;
tableLatencies.Controls.Add(l);
tableLatencies.SetCellPosition(l, new TableLayoutPanelCellPosition(2, 0));
}
for (int i = 0; i < heartbeatSRs.Count; i++)
{
// SR icon
PictureBox p = new PictureBox();
p.Image = Images.GetImage16For(heartbeatSRs[i].GetIcon);
p.SizeMode = PictureBoxSizeMode.AutoSize;
p.Padding = new Padding(0);
tableLatencies.Controls.Add(p);
tableLatencies.SetCellPosition(p, new TableLayoutPanelCellPosition((2 * i) + 3, 0));
// SR name
Label l = new Label();
l.Padding = new Padding(0, 5, 5, 5);
l.Font = BaseTabPage.ItemLabelFont;
l.ForeColor = BaseTabPage.ItemLabelForeColor;
l.AutoSize = false;
l.Size = new Size(200, 25);
l.AutoEllipsis = true;
l.Text = heartbeatSRs[i].Name;
tableLatencies.Controls.Add(l);
tableLatencies.SetCellPosition(l, new TableLayoutPanelCellPosition((2 * i) + 4, 0));
}
for (int i = 0; i < members.Count; i++)
{
// Server name label
Label l = new Label();
l.Padding = new Padding(5);
l.Font = BaseTabPage.ItemLabelFont;
l.ForeColor = BaseTabPage.ItemLabelForeColor;
l.AutoSize = true;
l.Text = members[i].Name.Ellipsise(30);
tableLatencies.Controls.Add(l);
tableLatencies.SetCellPosition(l, new TableLayoutPanelCellPosition(0, i + 1));
// Network HB status
l = new Label();
l.Padding = new Padding(0, 5, 0, 5);
l.Font = BaseTabPage.ItemValueFont;
l.AutoSize = true;
if (members[i].ha_network_peers.Length == members.Count)
{
l.ForeColor = Color.Green;
}
else
{
l.ForeColor = BaseTabPage.ItemValueForeColor;
}
if (members[i].ha_network_peers.Length == 0)
{
l.Text = Messages.HA_HEARTBEAT_UNHEALTHY;
}
else if (members[i].ha_network_peers.Length == members.Count)
{
l.Text = Messages.HA_HEARTBEAT_HEALTHY;
}
else
{
l.Text = string.Format(Messages.HA_HEARTBEAT_SERVERS, members[i].ha_network_peers.Length, members.Count);
}
tableLatencies.Controls.Add(l);
tableLatencies.SetCellPosition(l, new TableLayoutPanelCellPosition(1, i + 1));
tableLatencies.SetColumnSpan(l, 2);
// For each heartbeat SR, show health from this host's perspective
for (int j = 0; j < heartbeatSRs.Count; j++)
{
l = new Label();
l.Padding = new Padding(0, 5, 0, 5);
l.Font = BaseTabPage.ItemValueFont;
l.ForeColor = BaseTabPage.ItemValueForeColor;
l.AutoSize = true;
l.Text = Messages.HA_HEARTBEAT_UNHEALTHY;
foreach (string opaqueRef in members[i].ha_statefiles)
{
XenRef<VDI> vdiRef = new XenRef<VDI>(opaqueRef);
VDI vdi = pool.Connection.Resolve(vdiRef);
if (vdi == null)
continue;
SR sr = pool.Connection.Resolve(vdi.SR);
if (sr == null)
continue;
if (sr == heartbeatSRs[j])
{
l.ForeColor = Color.Green;
l.Text = Messages.HA_HEARTBEAT_HEALTHY;
break;
}
}
tableLatencies.Controls.Add(l);
tableLatencies.SetCellPosition(l, new TableLayoutPanelCellPosition((2 * j) + 2, i + 1));
tableLatencies.SetColumnSpan(l, 2);
}
}
tableLatencies.ResumeLayout();
tableLatencies.PerformLayout();
}
private static string getNtol(Pool pool)
{
long ntol = pool.ha_host_failures_to_tolerate;
if (ntol > 0)
{
return ntol.ToString();
}
else
{
return Messages.HA_NTOL_ZERO_HAPAGE;
}
}
private static string getPlanExistsFor(Pool pool)
{
long plan = pool.ha_plan_exists_for;
long ntol = pool.ha_host_failures_to_tolerate;
return plan == ntol ? plan.ToString() : String.Format(Messages.HA_OVERCOMMITTED_NTOL, plan);
}
private static bool haStatusRed(Pool pool)
{
return pool.ha_host_failures_to_tolerate > pool.ha_plan_exists_for;
}
private void generateSRHABox(SR sr)
{
CustomListRow header = CreateHeader(Messages.HA_CONFIGURATION_TITLE);
customListPanel.AddRow(header);
// We could do something here, e.g.
// HB SR for pool: xyz
// latency to h1: 123
// latency to h2: 456
// HB SR for pool: abc
// latency to j1: 123
// latency to j2: 456
AddBottomSpacing(header);
}
private void GP_ContextShow(object sender, ListPanelItemClickedEventArgs e)
{
ContextMenuStrip menu = new ContextMenuStrip();
foreach (ToolStripMenuItem item in e.Item.Row.MenuItems)
{
menu.Items.Add(item);
}
ToolStripMenuItem copyItem = new ToolStripMenuItem(Messages.COPY) { Image = Properties.Resources.copy_16 };
copyItem.Click += delegate
{
String text = Helpers.ToWindowsLineEndings(e.Item.Tag != null ? e.Item.Tag.ToString() : e.Item.Text);
Clip.SetClipboardText(text);
};
menu.Items.Add(copyItem);
menu.Show(this, PointToClient(MousePosition));
}
private static CustomListRow CreateHeader(string text)
{
return new CustomListRow(text, BaseTabPage.HeaderBackColor, BaseTabPage.HeaderForeColor, BaseTabPage.HeaderBorderColor, Program.DefaultFontHeader);
}
private static CustomListRow AddRow<T>(CustomListRow parent, string key, T obj, ToStringDelegate<T> del, bool valueBold) where T : IEquatable<T>
{
CustomListRow newChild = CreateNewRow(key + ": ", new ToStringWrapper<T>(obj, del), valueBold);
parent.AddChild(newChild);
return newChild;
}
private static CustomListRow CreateNewRow<T>(string key, ToStringWrapper<T> value, bool valueBold) where T : IEquatable<T>
{
CustomListItem Label = new CustomListItem(key, BaseTabPage.ItemLabelFont, BaseTabPage.ItemLabelForeColor);
Label.Anchor = AnchorStyles.Top;
Label.itemBorder.Bottom = BaseTabPage.ITEM_SPACING;
CustomListItem Value = new CustomListItem(value, valueBold ? BaseTabPage.ItemValueFontBold : BaseTabPage.ItemValueFont, BaseTabPage.ItemValueForeColor);
Value.Anchor = AnchorStyles.Top;
Value.itemBorder.Bottom = BaseTabPage.ITEM_SPACING;
return new CustomListRow(BaseTabPage.ItemBackColor, Label, Value);
}
private static void AddBottomSpacing(CustomListRow header)
{
if (header.Children.Count != 0)
{
header.AddChild(new CustomListRow(header.BackColor, 5));
}
}
private static string GetFriendlyName(string propertyName)
{
return XenAdmin.Core.PropertyManager.GetFriendlyName(string.Format("Label-{0}", propertyName));
}
private void buttonConfigure_Click(object sender, EventArgs e)
{
if (pool == null)
return;
EditHA(pool);
}
private void buttonEnableDisableHa_Click(object sender, EventArgs e)
{
if (pool == null)
return;
if (!pool.ha_enabled)
{
// Start HA wizard
EditHA(pool);
return;
}
// Offer to disable HA
DialogResult dr;
using (var dlg = new ThreeButtonDialog(
new ThreeButtonDialog.Details(
null,
string.Format(Messages.HA_DISABLE_QUERY, Helpers.GetName(pool).Ellipsise(30)),
Messages.DISABLE_HA),
"HADisable",
ThreeButtonDialog.ButtonYes,
ThreeButtonDialog.ButtonNo))
{
dr = dlg.ShowDialog(this);
}
if (dr != DialogResult.Yes)
return;
DisableHAAction action = new DisableHAAction(pool);
// We will need to re-enable buttons when the action completes
action.Completed += Program.MainWindow.action_Completed;
action.RunAsync();
Program.MainWindow.UpdateToolbars();
}
/// <summary>
/// Shows the appropriate dialog (HA wizard if HA is disabled for the pool, or VM restart priority editor otherwise).
/// </summary>
/// <param name="pool">Must not be null.</param>
internal static void EditHA(Pool pool)
{
// Do nothing if there is an HA action in progress
if (HelpersGUI.FindActiveHaAction(pool.Connection) != null)
{
log.Debug("Not opening HA dialog: an HA action is in progress");
return;
}
if (!pool.Connection.IsConnected)
{
log.Debug("Not opening HA dialog: the connection to the pool is now closed");
return;
}
if (pool.ha_enabled)
{
// Show VM restart priority editor
Program.MainWindow.ShowPerConnectionWizard(pool.Connection, new EditVmHaPrioritiesDialog(pool));
}
else
{
// Show wizard to enable HA
Program.MainWindow.ShowPerConnectionWizard(pool.Connection, new HAWizard(pool));
}
}
}
}