xenadmin/XenAdmin/Wizards/PatchingWizard/PlanActions/EvacuateHostPlanAction.cs
Konstantina Chremmou ed4b131643 Removed unused code and old style custom delegates, and updated property notation.
Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
2018-03-06 14:17:16 +00:00

101 lines
4.2 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
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using System.Collections.Generic;
using XenAdmin.Core;
using XenAPI;
namespace XenAdmin.Wizards.PatchingWizard.PlanActions
{
public class EvacuateHostPlanAction : PlanActionWithSession, IAvoidRestartHostsAware
{
private readonly XenRef<Host> _host;
private readonly Host currentHost;
public List<string> AvoidRestartHosts { private get; set; }
public EvacuateHostPlanAction(Host host)
: base(host.Connection, string.Format(Messages.PLANACTION_VMS_MIGRATING, host.Name()))
{
base.TitlePlan = string.Format(Messages.MIGRATE_VMS_OFF_SERVER, host.Name());
this._host = new XenRef<Host>(host);
currentHost = host;
Visible = false;
}
protected override Host CurrentHost
{
get { return currentHost; }
}
protected override void RunWithSession(ref Session session)
{
Host hostObject = TryResolveWithTimeout(_host);
// If there are no patches that require reboot, we skip the evacuate-reboot-bringbabiesback sequence
// But we only do this if we indicated that host restart should be avoided (by initializing the AvoidRestartHosts property)
if (Helpers.ElyOrGreater(hostObject) && AvoidRestartHosts != null)
{
log.DebugFormat("Checking host.patches_requiring_reboot now on '{0}'...", hostObject);
if (hostObject.updates_requiring_reboot.Count > 0)
{
AvoidRestartHosts.Remove(hostObject.uuid);
log.DebugFormat("Restart is needed now (hostObject.updates_requiring_reboot has {0} items in it). Evacuating now. Will restart after.", hostObject.updates_requiring_reboot.Count);
}
else
{
if (!AvoidRestartHosts.Contains(hostObject.uuid))
AvoidRestartHosts.Add(hostObject.uuid);
log.Debug("Will skip scheduled restart (livepatching succeeded), because hostObject.patches_requiring_reboot is empty.");
return;
}
}
Visible = true;
PBD.CheckAndPlugPBDsFor(Connection.ResolveAll(hostObject.resident_VMs));
log.DebugFormat("Disabling host {0}", hostObject.Name());
Host.disable(session, _host.opaque_ref);
Status = Messages.PLAN_ACTION_STATUS_MIGRATING_VMS_FROM_HOST;
log.DebugFormat("Migrating VMs from host {0}", hostObject.Name());
XenRef<Task> task = Host.async_evacuate(session, _host.opaque_ref);
PollTaskForResultAndDestroy(Connection, ref session, task);
}
}
}