xenadmin/XenModel/Actions/Host/DestroyHostAction.cs

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/* 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.Collections.Generic;
using System.Threading;
using XenAPI;
using System.Linq;
namespace XenAdmin.Actions
{
public class DestroyHostAction : AsyncAction
{
public DestroyHostAction(Pool pool, Host hostToDestroy)
: base(pool.Connection, string.Format(Messages.DESTROY_HOST_ACTION_TITLE, hostToDestroy.Name))
{
this.Pool = pool;
this.Host = hostToDestroy;
this.Description = Messages.WAITING;
SetRBACPermissions();
}
private void SetRBACPermissions()
{
AddCommonAPIMethodsToRoleCheck();
ApiMethodsToRoleCheck.Add("host.destroy");
ApiMethodsToRoleCheck.Add("sr.forget");
}
private bool IsSRDetached(SR sr)
{
if (sr == null)
return true;
// wait 2 minutes for all SR's PBDs to detach
const int max = 2 * 60;
int i = 0;
while (i++ < max)
{
if (!sr.HasPBDs)
return true;
Thread.Sleep(1000);
}
return !sr.HasPBDs;
}
protected override void Run()
{
Description = Messages.DESTROY_HOST_ACTION_DESC;
List<SR> srList = Connection.Cache.SRs.Where(sr => Host.Equals(sr.GetStorageHost()) && sr.IsLocalSR).ToList();
// number of SRs to forget + 1 host to destroy
int n = srList.Count + 1;
double p = 100.0 / n;
int i = 1;
RelatedTask = XenAPI.Host.async_destroy(Session, Host.opaque_ref);
PollToCompletion(0, p);
Description = Messages.DESTROY_HOST_ACTION_REMOVE_SRS_DESC;
// remove SRs which belonged to destroyed Host
foreach (SR sr in srList)
{
if (!IsSRDetached(sr))
{
Description = Messages.DESTROY_HOST_ACTION_COMPLETED_SRS_NOT_REMOVED_DESC;
return;
}
int lo = (int)(i * p);
int hi = (int)((i + 1) * p);
RelatedTask = XenAPI.SR.async_forget(Session, sr.opaque_ref);
PollToCompletion(lo, hi);
i++;
}
Description = Messages.DESTROY_HOST_ACTION_COMPLETED_DESC;
}
}
}