mirror of
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309 lines
13 KiB
C#
309 lines
13 KiB
C#
/* Copyright (c) Citrix Systems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using XenAPI;
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using XenAdmin.Diagnostics.Problems;
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using XenAdmin.Core;
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using System.IO;
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using XenAdmin.Diagnostics.Problems.HostProblem;
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using XenAdmin.Diagnostics.Problems.SRProblem;
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using System.Text.RegularExpressions;
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using System.Xml;
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using System.Collections.Generic;
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using XenAdmin.Actions;
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namespace XenAdmin.Diagnostics.Checks
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{
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class PatchPrecheckCheck : HostCheck
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{
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private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
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private readonly Pool_patch Patch;
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private readonly Pool_update Update;
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private static Regex PrecheckErrorRegex = new Regex("(<error).+(</error>)");
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private static Regex LivePatchResponseRegex = new Regex("(<livepatch).+(</livepatch>)");
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private readonly Dictionary<string, livepatch_status> livePatchCodesByHost;
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private SR srUploadedUpdates;
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public PatchPrecheckCheck(Host host, Pool_patch patch, Dictionary<string, livepatch_status> livePatchCodesByHost)
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: base(host)
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{
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Patch = patch;
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this.livePatchCodesByHost = livePatchCodesByHost;
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}
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public PatchPrecheckCheck(Host host, Pool_update update, Dictionary<string, livepatch_status> livePatchCodesByHost, SR srUploadedUpdates = null)
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: base(host)
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{
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Update = update;
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this.livePatchCodesByHost = livePatchCodesByHost;
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this.srUploadedUpdates = srUploadedUpdates;
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}
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protected override Problem RunCheck()
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{
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//
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// Check that the SR where the update was uploaded is still attached
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//
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if (srUploadedUpdates != null
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&& ((srUploadedUpdates.shared && !srUploadedUpdates.CanBeSeenFrom(Host))
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|| (!srUploadedUpdates.shared && srUploadedUpdates.IsBroken())))
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{
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return new BrokenSRWarning(this, Host, srUploadedUpdates);
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}
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//
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// Check patch isn't already applied here
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//
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if ((Patch != null && Patch.AppliedOn(Host) != DateTime.MaxValue)
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|| (Update != null && Update.AppliedOn(Host)))
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{
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return new PatchAlreadyApplied(this, Host);
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}
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if (!Host.IsLive())
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return new HostNotLiveWarning(this, Host);
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if (!Host.Connection.IsConnected)
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throw new EndOfStreamException(Helpers.GetName(Host.Connection));
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Session session = Host.Connection.DuplicateSession();
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try
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{
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if (Patch != null)
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{
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string result = Pool_patch.precheck(session, Patch.opaque_ref, Host.opaque_ref);
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log.DebugFormat("Pool_patch.precheck returned: '{0}'", result);
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return FindProblem(result);
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}
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if (Update!= null)
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{
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var livepatchStatus = Pool_update.precheck(session, Update.opaque_ref, Host.opaque_ref);
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log.DebugFormat("Pool_update.precheck returned livepatch_status: '{0}'", livepatchStatus);
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if (livePatchCodesByHost != null)
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livePatchCodesByHost[Host.uuid] = livepatchStatus;
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return null;
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}
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//trying to apply update to partially upgraded pool
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if (Helpers.ElyOrGreater(Helpers.GetMaster(Host.Connection)) && !Helpers.ElyOrGreater(Host))
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{
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return new WrongServerVersion(this, Host);
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}
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return null;
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}
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catch (Failure f)
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{
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log.Error(string.Join(",", f.ErrorDescription.ToArray()), f);
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// try and find problem from the xapi failure
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Problem problem = FindProblem(f);
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return problem ?? new PrecheckFailed(this, Host, f);
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}
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}
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public override string Description
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{
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get { return Messages.SERVER_SIDE_CHECK_DESCRIPTION; }
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}
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/// <summary>
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/// Find problem from xml result
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/// </summary>
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/// <param name="result">xml result, as returned by Pool_patch.precheck() call.
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/// E.g.:
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/// <error errorcode="PATCH_PRECHECK_FAILED_OUT_OF_SPACE">
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/// <found>2049859584</found>
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/// <required>10000000000</required>
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/// </error>
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/// </param>
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/// <returns>Problem or null, if no problem found</returns>
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private Problem FindProblem(string result)
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{
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if (!PrecheckErrorRegex.IsMatch(result.Replace("\n", "")))
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return null;
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Match m = PrecheckErrorRegex.Match(result.Replace("\n", ""));
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XmlDocument doc = new XmlDocument();
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doc.LoadXml(m.ToString());
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log.Error(m.ToString());
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XmlNode errorNode = doc.FirstChild;
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string errorcode = errorNode.Attributes != null && errorNode.Attributes["errorcode"] != null
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? errorNode.Attributes["errorcode"].Value
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: string.Empty;
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if (errorcode == "")
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return null;
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var found = "";
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var required = "";
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foreach (XmlNode node in errorNode.ChildNodes)
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{
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if (node.Name == "found")
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found = node.InnerXml;
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else if (node.Name == "required")
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required = node.InnerXml;
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}
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var problem = FindProblem(errorcode, found, required);
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return problem ?? new PrecheckFailed(this, Host, new Failure(errorcode));
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}
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/// <summary>
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/// Find problem from xapi Failure
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/// </summary>
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/// <param name="failure">Xapi failure, thrown by Pool_patch.precheck() call.
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/// E.g.: failure.ErrorDescription.Count = 4
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/// ErrorDescription[0] = "PATCH_PRECHECK_FAILED_WRONG_SERVER_VERSION"
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/// ErrorDescription[1] = "OpaqueRef:612b5eee-03dc-bbf5-3385-6905fdc9b079"
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/// ErrorDescription[2] = "6.5.0"
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/// ErrorDescription[3] = "^6\\.2\\.0$"
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/// E.g.: failure.ErrorDescription.Count = 2
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/// ErrorDescription[0] = "OUT_OF_SPACE"
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/// ErrorDescription[1] = "/var/patch"
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/// </param>
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/// <returns>Problem or null, if no problem found</returns>
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private Problem FindProblem(Failure failure)
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{
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if (failure.ErrorDescription.Count == 0)
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return null;
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var errorcode = failure.ErrorDescription[0];
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var found = "";
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var required = "";
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if (failure.ErrorDescription.Count > 2)
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found = failure.ErrorDescription[2];
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if (failure.ErrorDescription.Count > 3)
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required = failure.ErrorDescription[3];
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return FindProblem(errorcode, found, required);
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}
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private Problem FindProblem(string errorcode, string found, string required)
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{
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long requiredSpace = 0;
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long foundSpace = 0;
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long reclaimableDiskSpace = 0;
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DiskSpaceRequirements diskSpaceReq;
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switch (errorcode)
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{
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case "UPDATE_PRECHECK_FAILED_WRONG_SERVER_VERSION":
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return new WrongServerVersion(this, Host);
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case "UPDATE_PRECHECK_FAILED_CONFLICT_PRESENT":
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return new ConflictingUpdatePresent(this, found, Host);
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case "UPDATE_PRECHECK_FAILED_PREREQUISITE_MISSING":
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return new PrerequisiteUpdateMissing(this, found, Host);
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case "PATCH_PRECHECK_FAILED_WRONG_SERVER_VERSION":
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return new WrongServerVersion(this, required, Host);
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case "PATCH_PRECHECK_FAILED_OUT_OF_SPACE":
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System.Diagnostics.Trace.Assert(!Helpers.ElyOrGreater(Host.Connection)); // If Ely or greater, we shouldn't get this error
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long.TryParse(found, out foundSpace);
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long.TryParse(required, out requiredSpace);
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// get reclaimable disk space (excluding current patch)
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try
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{
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var args = new Dictionary<string, string> { { "exclude", Patch.uuid } };
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var resultReclaimable = Host.call_plugin(Host.Connection.Session, Host.opaque_ref, "disk-space", "get_reclaimable_disk_space", args);
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reclaimableDiskSpace = Convert.ToInt64(resultReclaimable);
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}
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catch (Exception exception)
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{
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log.WarnFormat("Plugin call disk-space.get_reclaimable_disk_space on {0} failed with {1}", Host.Name(), exception.Message);
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}
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diskSpaceReq = new DiskSpaceRequirements(DiskSpaceRequirements.OperationTypes.install, Host, Patch.Name(), requiredSpace, foundSpace, reclaimableDiskSpace);
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return new HostOutOfSpaceProblem(this, Host, Patch, diskSpaceReq);
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case "UPDATE_PRECHECK_FAILED_OUT_OF_SPACE":
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System.Diagnostics.Trace.Assert(Helpers.ElyOrGreater(Host.Connection)); // If not Ely or greater, we shouldn't get this error
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long.TryParse(found, out foundSpace);
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long.TryParse(required, out requiredSpace);
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diskSpaceReq = new DiskSpaceRequirements(DiskSpaceRequirements.OperationTypes.install, Host, Update.Name(), requiredSpace, foundSpace, 0);
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return new HostOutOfSpaceProblem(this, Host, Update, diskSpaceReq);
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case "OUT_OF_SPACE":
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if (Patch != null || Update != null)
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{
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var action = Patch != null
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? new GetDiskSpaceRequirementsAction(Host, Patch, true)
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: new GetDiskSpaceRequirementsAction(Host, Update.Name(), Update.installation_size, true);
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try
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{
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action.RunExternal(action.Session);
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}
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catch
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{
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log.WarnFormat("Could not get disk space requirements");
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}
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if (action.Succeeded)
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return Patch != null
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? new HostOutOfSpaceProblem(this, Host, Patch, action.DiskSpaceRequirements)
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: new HostOutOfSpaceProblem(this, Host, Update, action.DiskSpaceRequirements);
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}
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break;
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case "LICENCE_RESTRICTION":
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return new LicenseRestrictionProblem(this, Host);
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case "UPDATE_PRECHECK_FAILED_UNKNOWN_ERROR":
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// try to find the problem from the error parameters as xml string
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// e.g.
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// ErrorDescription[0] = "UPDATE_PRECHECK_FAILED_UNKNOWN_ERROR"
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// ErrorDescription[1] = "test-update"
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// ErrorDescription[2] = "<?xml version="1.0" ?><error errorcode="LICENCE_RESTRICTION"></error>"
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return FindProblem(found);
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}
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return null;
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}
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}
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}
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