xenadmin/XenAdmin/Wizards/PatchingWizard/PlanActions/BringBabiesBackAction.cs
Konstantina Chremmou ae22560ce8 Converted all extension get properties of the API classes to methods in order to
prevent them from being serialised alongside the API properties. This will also
be useful for moving the API bindings out of XenModel.

Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
2017-09-03 03:35:30 +01:00

164 lines
6.3 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,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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using System;
using System.Collections.Generic;
using System.Threading;
using XenAdmin.Core;
using XenAPI;
namespace XenAdmin.Wizards.PatchingWizard.PlanActions
{
public class BringBabiesBackAction : PlanActionWithSession, IAvoidRestartHostsAware
{
private readonly XenRef<Host> _host;
private readonly Host currentHost;
private readonly List<XenRef<VM>> _vms;
private readonly bool _enableOnly = false;
public List<string> AvoidRestartHosts { private get; set; }
public BringBabiesBackAction(List<XenRef<VM>> vms, Host host, bool enableOnly)
: base(host.Connection, string.Format(Messages.UPDATES_WIZARD_EXITING_MAINTENANCE_MODE, host.Name()))
{
base.TitlePlan = string.Format(Messages.EXIT_SERVER_FROM_MAINTENANCE_MODE, host.Name());
this._host = new XenRef<Host>(host);
this._vms = vms;
this._enableOnly = enableOnly;
currentHost = host;
visible = false;
}
protected override Host CurrentHost
{
get { return currentHost; }
}
protected override void RunWithSession(ref Session session)
{
// If there are no patches that require reboot, we skip the evacuate-reboot-bringbabiesback sequence
if (Helpers.ElyOrGreater(currentHost) && AvoidRestartHosts != null && AvoidRestartHosts.Contains(currentHost.uuid))
{
log.Debug("Skipped scheduled restart (livepatching succeeded), BringBabiesBackAction is skipped.");
return;
}
visible = true;
Status = Messages.PLAN_ACTION_STATUS_RECONNECTING_STORAGE;
PBD.CheckAndBestEffortPlugPBDsFor(Connection, _vms);
//
// CA-17428: Apply hotfixes to a pool of hosts through XenCenter fails.
//
// Host do reenable themselves anyway, so just wait 1 min for that,
// occasionally poking it.
//
int retries = 0;
Status = Messages.PLAN_ACTION_STATUS_REENABLING_HOST;
while (!Host.get_enabled(session, _host.opaque_ref))
{
retries++;
Thread.Sleep(1000);
try
{
Host.enable(session, _host.opaque_ref);
}
catch (Exception e)
{
if (retries > 60)
throw;
log.Debug(string.Format("Cannot enable host {0}. Retrying in 1 sec.", _host.opaque_ref), e);
}
}
if(_enableOnly)
return;
int vmCount = _vms.Count;
int vmNumber = 0;
foreach (VM vm in Connection.ResolveAll(_vms))
{
int tries = 0;
if(vm.power_state != vm_power_state.Running)
continue; // vm may have been shutdown or suspended.
do
{
tries++;
try
{
Status = string.Format(Messages.PLAN_ACTION_STATUS_MIGRATING_VM_X_OF_Y, vmNumber + 1, vmCount);
log.DebugFormat("Migrating VM '{0}' back to Host '{1}'", Helpers.GetName(vm),
Helpers.GetName(Connection.Resolve(_host)));
PollTaskForResultAndDestroy(Connection, ref session,
VM.async_live_migrate(session, vm.opaque_ref, _host.opaque_ref),
(vmNumber * 100) / vmCount, ((vmNumber + 1) * 100) / vmCount);
vmNumber++;
}
catch (Failure e)
{
// When trying to put the first vm back, we get all sorts
// of errors ie storage not plugged yet etc. Just ignore them for now
if (vmNumber > 0 || tries > 24)
throw;
log.Debug(string.Format("Error migrating VM '{0}' back to Host '{1}'",
Helpers.GetName(vm), Helpers.GetName(Connection.Resolve(_host))), e);
Thread.Sleep(5000);
}
} while (vmNumber == 0);
}
Host hostModelObject = Connection.Resolve(_host);
if (hostModelObject != null)
{
log.DebugFormat("Cleaning up evacuated VMs from Host '{0}'", hostModelObject.Name());
hostModelObject.ClearEvacuatedVMs(session);
}
}
}
}