xenadmin/XenAdmin/Wizards/PatchingWizard/PlanActions/RestartHostPlanAction.cs
Konstantina Chremmou 4b6e826ed3 CA-284125: Prioritise a pending host restart over a mandatory toolstack restart.
For this purpose, the evacuate-reboot-bringbabiesback triplet was replaced by a
new RestartHostPlanAction, which allows fallback to toolstack restart if live
patching has succeeded. Also, created new abstract class HostPlanAction to
reduce code duplication.

Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>
2018-03-06 15:12:04 +00:00

90 lines
3.5 KiB
C#

/* Copyright (c) Citrix Systems, Inc.
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using System;
using System.Collections.Generic;
using XenAdmin.Core;
using XenAPI;
namespace XenAdmin.Wizards.PatchingWizard.PlanActions
{
public class RestartHostPlanAction : RebootPlanAction
{
private readonly List<XenRef<VM>> _vms;
private readonly bool _restartAgentFallback;
public RestartHostPlanAction(Host host, List<XenRef<VM>> vms, bool restartAgentFallback = false)
: base(host, string.Empty)
{
_vms = vms;
Visible = false;
_restartAgentFallback = restartAgentFallback;
}
protected override void RunWithSession(ref Session session)
{
Visible = true;
var hostObj = GetResolvedHost();
if (Helpers.ElyOrGreater(hostObj))
{
log.DebugFormat("Checking host.patches_requiring_reboot now on '{0}'.", hostObj);
if (hostObj.updates_requiring_reboot.Count > 0)
{
log.DebugFormat("Found {0} patches requiring reboot (live patching failed)."
+ "Initiating evacuate-reboot-bringbabiesback process.",
hostObj.updates_requiring_reboot.Count);
}
else if (_restartAgentFallback)
{
log.Debug("Live patching succeeded. Restarting agent.");
Title = string.Format(Messages.UPDATES_WIZARD_RESTARTING_AGENT, hostObj.Name());
WaitForReboot(ref session, Host.AgentStartTime, s => Host.async_restart_agent(s, HostXenRef.opaque_ref));
return;
}
else
{
log.Debug("Did not find patches requiring reboot (live patching succeeded)."
+ " Skipping scheduled restart.");
return;
}
}
EvacuateHost(ref session);
RebootHost(ref session);
BringBabiesBack(ref session, _vms, false);
}
}
}