mirror of
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40a634d324
- vendor check is not needed in the functions where we check whether to warn the users about different feature levels, as the pool join is not allowed if the vendors are different - renamed some of the functions - feature comparison is now done eight characters at a time, converted into a 32-bit integer Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>
618 lines
27 KiB
C#
618 lines
27 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 System.Collections.Generic;
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using XenAdmin.Network;
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using XenAPI;
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namespace XenAdmin.Core
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{
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/// <summary>
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/// Encapsulates whether a slave can join a given pool
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/// </summary>
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public static class PoolJoinRules
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{
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// The order of the enum determines the order we sort the hosts in, in the New Pool Wizard
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public enum Reason
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{
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WillBeMaster,
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Allowed,
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Connecting,
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MasterNotConnected,
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MasterConnecting,
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DifferentAdConfig,
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HasRunningVMs,
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HasSharedStorage,
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IsAPool,
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LicenseRestriction,
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NotSameLinuxPack,
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PaidHostFreeMaster,
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FreeHostPaidMaster,
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LicensedHostUnlicensedMaster,
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UnlicensedHostLicensedMaster,
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LicenseMismatch,
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DifferentServerVersion,
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DifferentCPUs,
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DifferentNetworkBackends,
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MasterHasHA,
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WrongRoleOnMaster,
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WrongRoleOnSlave,
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NotConnected,
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}
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// The order of if's in CanJoinPool() determines which reason we display if there is more than one.
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// At least as far as WillBeMaster, some callers may rely on the order.
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// Also, some of the private functions in this file rely on previous tests (especially for
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// null-ness and connectedness) having been done first.
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/// <summary>
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/// Whether a server can join a pool (or form a pool with a standalone server)
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/// </summary>
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/// <param name="slaveConnection">The connection of the server that wants to join the pool</param>
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/// <param name="masterConnection">The connection of the existing pool or of the proposed master of a new pool</param>
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/// <param name="allowLicenseUpgrade">Whether we can upgrade a free host to a v6 license of the pool it's joining</param>
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/// <param name="allowCpuLevelling">Whether we can apply CPU levelling to the slave before it joins the pool</param>
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/// <returns>The reason why the server can't join the pool, or Reason.Allowed if it's OK</returns>
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public static Reason CanJoinPool(IXenConnection slaveConnection, IXenConnection masterConnection, bool allowLicenseUpgrade, bool allowCpuLevelling, bool allowSlaveAdConfig)
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{
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if (!Helpers.IsConnected(slaveConnection)) // also implies slaveConnection != null
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return Reason.NotConnected;
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Host slaveHost = Helpers.GetMaster(slaveConnection);
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if (Connecting(slaveHost)) // also implies slaveHost != null
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return Reason.Connecting;
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if (LicenseRestriction(slaveHost))
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return Reason.LicenseRestriction;
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if (IsAPool(slaveConnection))
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return Reason.IsAPool;
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if (!Helpers.IsConnected(masterConnection)) // also implies masterConnection != null
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return Reason.MasterNotConnected;
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Host masterHost = Helpers.GetMaster(masterConnection);
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if (Connecting(masterHost)) // also implies masterHost != null
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return Reason.MasterConnecting;
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if (WillBeMaster(slaveConnection, masterConnection))
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return Reason.WillBeMaster;
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if (!RoleOK(masterConnection))
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return Reason.WrongRoleOnMaster;
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if (!CompatibleCPUs(slaveHost, masterHost, allowCpuLevelling))
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return Reason.DifferentCPUs;
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if (DifferentServerVersion(slaveHost, masterHost))
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return Reason.DifferentServerVersion;
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if (FreeHostPaidMaster(slaveHost, masterHost, allowLicenseUpgrade))
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return Helpers.ClearwaterOrGreater(masterHost) ?
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Reason.UnlicensedHostLicensedMaster :
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Reason.FreeHostPaidMaster;
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if (PaidHostFreeMaster(slaveHost, masterHost))
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return Helpers.ClearwaterOrGreater(masterHost) ?
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Reason.LicensedHostUnlicensedMaster :
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Reason.PaidHostFreeMaster;
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if (LicenseMismatch(slaveHost, masterHost))
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return Reason.LicenseMismatch;
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if (!SameLinuxPack(slaveHost, masterHost))
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return Reason.NotSameLinuxPack;
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if (!RoleOK(slaveConnection))
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return Reason.WrongRoleOnSlave;
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if (HasSharedStorage(slaveConnection))
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return Reason.HasSharedStorage;
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if (HasRunningVMs(slaveConnection))
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return Reason.HasRunningVMs;
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if (DifferentNetworkBackends(slaveHost, masterHost))
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return Reason.DifferentNetworkBackends;
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if (!CompatibleAdConfig(slaveHost, masterHost, allowSlaveAdConfig))
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return Reason.DifferentAdConfig;
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if (HaEnabled(masterConnection))
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return Reason.MasterHasHA;
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return Reason.Allowed;
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}
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public static string ReasonMessage(Reason reason)
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{
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switch (reason)
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{
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case Reason.WillBeMaster:
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return Messages.MASTER;
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case Reason.Allowed:
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return "";
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case Reason.Connecting:
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return Messages.CONNECTING;
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case Reason.MasterNotConnected:
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return Messages.NEWPOOL_MASTER_DISCONNECTED;
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case Reason.MasterConnecting:
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return Messages.NEWPOOL_MASTER_CONNECTING;
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case Reason.DifferentAdConfig:
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return Messages.NEWPOOL_DIFFERING_AD_CONFIG;
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case Reason.HasRunningVMs:
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return Messages.NEWPOOL_HAS_RUNNING_VMS;
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case Reason.HasSharedStorage:
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return Messages.NEWPOOL_HAS_SHARED_STORAGE;
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case Reason.IsAPool:
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return Messages.NEWPOOL_IS_A_POOL;
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case Reason.LicenseRestriction:
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return Messages.NEWPOOL_POOLINGRESTRICTED;
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case Reason.NotSameLinuxPack:
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return Messages.NEWPOOL_LINUXPACK;
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case Reason.PaidHostFreeMaster:
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return Messages.NEWPOOL_PAID_HOST_FREE_MASTER;
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case Reason.FreeHostPaidMaster:
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return Messages.NEWPOOL_FREE_HOST_PAID_MASTER;
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case Reason.LicensedHostUnlicensedMaster:
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return Messages.NEWPOOL_LICENSED_HOST_UNLICENSED_MASTER;
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case Reason.UnlicensedHostLicensedMaster:
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return Messages.NEWPOOL_UNLICENSED_HOST_LICENSED_MASTER;
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case Reason.LicenseMismatch:
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return Messages.NEWPOOL_LICENSEMISMATCH;
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case Reason.DifferentServerVersion:
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return Messages.NEWPOOL_DIFF_SERVER;
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case Reason.DifferentCPUs:
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return Messages.NEWPOOL_DIFF_HARDWARE;
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case Reason.DifferentNetworkBackends:
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return Messages.NEWPOOL_DIFFERENT_NETWORK_BACKENDS;
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case Reason.NotConnected:
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return Messages.DISCONNECTED;
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case Reason.MasterHasHA:
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return Messages.POOL_JOIN_FORBIDDEN_BY_HA;
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case Reason.WrongRoleOnMaster:
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return Messages.NEWPOOL_MASTER_ROLE;
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case Reason.WrongRoleOnSlave:
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return Messages.NEWPOOL_SLAVE_ROLE;
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default:
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System.Diagnostics.Trace.Assert(false, "Unknown reason");
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return "";
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}
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}
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private static bool WillBeMaster(IXenConnection slave, IXenConnection master)
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{
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// Assume we have already tested that the connection has no other reason why it can't be a master
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// (e.g., connected, licensing restrictions, ...)
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return slave == master;
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}
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private static bool HasSharedStorage(IXenConnection connection)
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{
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foreach (SR sr in connection.Cache.SRs)
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{
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if (sr.shared && !sr.IsToolsSR)
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return true;
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}
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return false;
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}
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private static bool HasRunningVMs(IXenConnection connection)
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{
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foreach (VM vm in connection.Cache.VMs)
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{
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if (vm.is_a_real_vm && (vm.power_state == XenAPI.vm_power_state.Running || vm.power_state == XenAPI.vm_power_state.Suspended))
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return true;
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}
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return false;
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}
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private static bool Connecting(Host host)
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{
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return host == null;
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}
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private static bool IsAPool(IXenConnection connection)
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{
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return Helpers.GetPool(connection) != null;
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}
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private static bool LicenseRestriction(Host host)
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{
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return host.RestrictPooling;
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}
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// If CompatibleCPUs(slave, master, false) is true, the CPUs can be pooled without masking first.
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// If CompatibleCPUs(slave, master, true) is true but CompatibleCPUs(slave, master, false) is false,
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// the CPUs can be pooled but only if they are masked first.
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public static bool CompatibleCPUs(Host slave, Host master, bool allowCpuLevelling)
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{
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if (slave == null || master == null)
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return true;
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Dictionary<string, string> slave_cpu_info = slave.cpu_info;
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Dictionary<string, string> master_cpu_info = master.cpu_info;
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if (!Helper.AreEqual2(slave_cpu_info, null) && !Helper.AreEqual2(master_cpu_info, null))
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{
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// Host.cpu_info is supported
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// From this point on, it is only necessary to have matching vendor and features
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// (after masking the slave, if allowed).
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if (slave_cpu_info["vendor"] != master_cpu_info["vendor"])
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return false;
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// No feature checks are needed for Dundee or greater hosts
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if (Helpers.DundeeOrGreater(master))
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return true;
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if (slave_cpu_info["features"] == master_cpu_info["features"])
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return true;
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if (allowCpuLevelling)
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{
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string cpuid_feature_mask = null;
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Pool pool = Helpers.GetPoolOfOne(master.Connection);
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if (pool != null && pool.other_config.ContainsKey("cpuid_feature_mask"))
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cpuid_feature_mask = pool.other_config["cpuid_feature_mask"];
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return MaskableTo(slave_cpu_info["maskable"], slave_cpu_info["physical_features"], master_cpu_info["features"], cpuid_feature_mask);
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}
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return false;
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}
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// Host.cpu_info not supported: use the old method which compares vendor, family, model and flags
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foreach (Host_cpu cpu1 in slave.Connection.Cache.Host_cpus)
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{
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foreach (Host_cpu cpu2 in master.Connection.Cache.Host_cpus)
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{
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if (cpu1.vendor != cpu2.vendor ||
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cpu1.family != cpu2.family ||
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cpu1.model != cpu2.model ||
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cpu1.flags != cpu2.flags)
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{
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return false;
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}
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}
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}
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return true;
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}
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/// <summary>
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/// Can the features represented by "from" be masked to become the features represented by "to"?
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/// </summary>
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/// <param name="mask_type">"no", "base" (can only mask first 64 bits) or "full"</param>
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/// <param name="from">The unmasked features, as a set of 32 hex digits, possibly separated by spaces or dashes</param>
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/// <param name="to">The target features, as a set of 32 hex digits, possibly separated by spaces or dashes</param>
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/// <param name="feature_mask">A mask of features to ignore for the comparison</param>
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public static bool MaskableTo(string mask_type, string from, string to, string feature_mask)
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{
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if (mask_type == "no")
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return false;
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string from2 = from.Replace(" ", "");
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from2 = from2.Replace("-", "");
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string to2 = to.Replace(" ", "");
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to2 = to2.Replace("-", "");
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if (from2.Length != 32 || to2.Length != 32)
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return false;
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string fm2;
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if (feature_mask == null)
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fm2 = "ffffffffffffffffffffffffffffffff";
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else
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{
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fm2 = feature_mask.Replace(" ", "");
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fm2 = fm2.Replace("-", "");
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if (fm2.Length != 32)
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fm2 = "ffffffffffffffffffffffffffffffff";
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}
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// Compare int64-by-int64. AMD can mask all the bits; some Intel chips can only mask the first half.
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for (int i = 0; i < 2; ++i)
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{
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string fromPart = from2.Substring(16 * i, 16);
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string toPart = to2.Substring(16 * i, 16);
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string fmPart = fm2.Substring(16 * i, 16);
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ulong fromInt = Convert.ToUInt64(fromPart, 16);
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ulong toInt = Convert.ToUInt64(toPart, 16);
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ulong fmInt = Convert.ToUInt64(fmPart, 16);
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fromInt &= fmInt;
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toInt &= fmInt;
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if (i == 1 && mask_type == "base") // must be an exact match
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{
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if (fromInt != toInt)
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return false;
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}
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else // "from" must be maskable to "to"
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{
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if ((fromInt & toInt) != toInt)
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return false;
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}
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}
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return true;
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}
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private static bool DifferentServerVersion(Host slave, Host master)
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{
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// Probably all the others will be equal if the hg_id is equal, but let's
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// mimic the test on the server side (xen-api.hg:ocaml/xapi/xapi_pool.ml).
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return
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slave.hg_id != master.hg_id ||
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slave.BuildNumberRaw != master.BuildNumberRaw ||
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slave.ProductVersion != master.ProductVersion ||
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slave.ProductBrand != master.ProductBrand;
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}
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private static bool SameLinuxPack(Host slave, Host master)
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{
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return slave.LinuxPackPresent == master.LinuxPackPresent;
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}
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public static bool CompatibleAdConfig(Host slave, Host master, bool allowSlaveConfig)
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{
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if (slave == null || master == null)
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return false;
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// CA-30223: There is no need to check the config of the auth services are the same, as xapi only relies on these two values being equal
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if (slave.external_auth_type != master.external_auth_type ||
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slave.external_auth_service_name != master.external_auth_service_name)
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{
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// if the slave is AD free and we are allowing the configure then we can solve this
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if (slave.external_auth_type == Auth.AUTH_TYPE_NONE && allowSlaveConfig)
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return true;
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return false;
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}
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return true;
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}
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public static bool FreeHostPaidMaster(Host slave, Host master, bool allowLicenseUpgrade)
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{
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if (slave == null || master == null)
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return false;
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// Is using per socket generation licenses?
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if (Helpers.ClearwaterOrGreater(slave) && Helpers.ClearwaterOrGreater(master))
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return slave.IsFreeLicense() && !master.IsFreeLicense() && !allowLicenseUpgrade;
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if (slave.IsFloodgateOrLater() && master.IsFloodgateOrLater() &&
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Host.RestrictHAFloodgate(slave) && !Host.RestrictHAFloodgate(master))
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{
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// See http://scale.ad.xensource.com/confluence/display/engp/v6+licensing+for+XenServer+Essentials, req R21a.
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// That section implies that we should downgrade a paid host to join a free pool, but that can't be the intention
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// (confirmed by Carl Fischer). Carl's also not concerned about fixing up Enterprise/Platinum mismatches.
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if (allowLicenseUpgrade && Helpers.MidnightRideOrGreater(master))
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return false;
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return true;
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}
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return false;
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}
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private static bool PaidHostFreeMaster(Host slave, Host master)
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{
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if (slave == null || master == null)
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return false;
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// Is using per socket generation licenses?
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if (Helpers.ClearwaterOrGreater(slave) && Helpers.ClearwaterOrGreater(master))
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return !slave.IsFreeLicense() && master.IsFreeLicense();
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return (slave.IsFloodgateOrLater() && master.IsFloodgateOrLater() &&
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!Host.RestrictHAFloodgate(slave) && Host.RestrictHAFloodgate(master));
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}
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private static bool LicenseMismatch(Host slave, Host master)
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{
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if (Helpers.MidnightRideOrGreater(slave) && Helpers.MidnightRideOrGreater(master))
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{
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Host.Edition slaveEdition = Host.GetEdition(slave.edition);
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Host.Edition masterEdition = Host.GetEdition(master.edition);
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return slaveEdition != Host.Edition.Free && masterEdition != Host.Edition.Free && slaveEdition != masterEdition;
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}
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return false;
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}
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private static bool HaEnabled(IXenConnection connection)
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{
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Pool pool = Helpers.GetPoolOfOne(connection);
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return (pool != null && pool.ha_enabled);
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}
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private static bool RoleOK(IXenConnection connection)
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{
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return
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!Helpers.MidnightRideOrGreater(connection) ||
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Role.CanPerform(new RbacMethodList("pool.join"), connection);
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}
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private static bool DifferentNetworkBackends(Host slave, Host master)
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{
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if (slave.software_version.ContainsKey("network_backend") &&
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master.software_version.ContainsKey("network_backend") &&
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slave.software_version["network_backend"] != master.software_version["network_backend"])
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return true;
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var masterPool = Helpers.GetPoolOfOne(master.Connection);
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var slavePool = Helpers.GetPoolOfOne(slave.Connection);
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return masterPool != null && slavePool != null &&
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masterPool.vSwitchController && slavePool.vSwitchController &&
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masterPool.vswitch_controller != slavePool.vswitch_controller;
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}
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/// <summary>
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/// Check whether all supp packs that request homogeneity are in fact homogeneous
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/// across the proposed pool. This is only a warning; it does not prevent the pool being created;
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/// so it is not used by CanJoinPool.
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/// </summary>
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/// <returns>A list of strings: each string is the name of a bad supp pack with a reason in brackets</returns>
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public static List<string> HomogeneousSuppPacksDiffering(List<Host> slaves, IXenObject poolOrMaster)
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{
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List<Host> allHosts = new List<Host>(slaves);
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allHosts.AddRange(poolOrMaster.Connection.Cache.Hosts);
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// Make a dictionary of all supp packs that should be homogeneous
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|
Dictionary<string, string> homogeneousPacks = new Dictionary<string, string>();
|
|
foreach (Host host in allHosts)
|
|
{
|
|
foreach (Host.SuppPack suppPack in host.SuppPacks)
|
|
{
|
|
if (suppPack.Homogeneous)
|
|
homogeneousPacks[suppPack.OriginatorAndName] = suppPack.Description;
|
|
}
|
|
}
|
|
|
|
// Now for each such supp pack, see whether it is in fact homogeneous.
|
|
// If not, add it to the list of bad packs with a reason.
|
|
|
|
List<string> badPacks = new List<string>();
|
|
|
|
foreach (string pack in homogeneousPacks.Keys)
|
|
{
|
|
// Is it present on all hosts, with the same version?
|
|
List<Host> missingHosts = new List<Host>();
|
|
string expectedVersion = null;
|
|
bool versionsDiffer = false;
|
|
|
|
foreach (Host host in allHosts)
|
|
{
|
|
Host.SuppPack matchingPack = host.SuppPacks.Find(sp => (sp.OriginatorAndName == pack));
|
|
if (matchingPack == null)
|
|
missingHosts.Add(host);
|
|
else if (expectedVersion == null)
|
|
expectedVersion = matchingPack.Version;
|
|
else if (matchingPack.Version != expectedVersion)
|
|
versionsDiffer = true;
|
|
}
|
|
|
|
if (missingHosts.Count != 0)
|
|
{
|
|
badPacks.Add(string.Format(Messages.SUPP_PACK_MISSING_ON,
|
|
homogeneousPacks[pack], // the Description field from the pack, which we cunningly remembered to save above
|
|
string.Join("\n", missingHosts.ConvertAll(host => host.ToString()).ToArray()))); // comma-separated list of hosts
|
|
}
|
|
else if (versionsDiffer)
|
|
{
|
|
badPacks.Add(string.Format(Messages.SUPP_PACK_VERSIONS_DIFFER, homogeneousPacks[pack]));
|
|
}
|
|
}
|
|
|
|
return badPacks;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether the host that joins the pool has a more extensive feature set than the pool (as long as the CPU vendor is common)
|
|
/// In this case the host will transparently be down-levelled to the pool level (without needing reboots)
|
|
/// </summary>
|
|
public static bool HostHasMoreFeatures(Host slave, Pool pool)
|
|
{
|
|
if (slave == null || pool == null)
|
|
return false;
|
|
|
|
Dictionary<string, string> slave_cpu_info = slave.cpu_info;
|
|
Dictionary<string, string> pool_cpu_info = pool.cpu_info;
|
|
if (!Helper.AreEqual2(slave_cpu_info, null) && !Helper.AreEqual2(pool_cpu_info, null))
|
|
{
|
|
// if pool has less features than slave, then slave will be down-levelled
|
|
return FewerFeatures(pool_cpu_info, slave_cpu_info);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether the host that joins the pool has a less extensive feature set than the pool (as long as the CPU vendor is common)
|
|
/// In this case the pool is transparently down-levelled to the new host's level (without needing reboots)
|
|
/// </summary>
|
|
public static bool HostHasFewerFeatures(Host slave, Pool pool)
|
|
{
|
|
if (slave == null || pool == null)
|
|
return false;
|
|
|
|
Dictionary<string, string> slave_cpu_info = slave.cpu_info;
|
|
Dictionary<string, string> pool_cpu_info = pool.cpu_info;
|
|
if (!Helper.AreEqual2(slave_cpu_info, null) && !Helper.AreEqual2(pool_cpu_info, null))
|
|
{
|
|
// if slave has less features than pool, then pool will be down-levelled
|
|
return FewerFeatures(slave_cpu_info, pool_cpu_info);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check whether first CPU has fewer features than the second.
|
|
/// It returns true if the first feature set is less than the second one in at least one bit
|
|
/// </summary>
|
|
public static bool FewerFeatures(Dictionary<string, string> cpu_infoA, Dictionary<string, string> cpu_infoB)
|
|
{
|
|
if (cpu_infoA.ContainsKey("features_hvm") && cpu_infoB.ContainsKey("features_hvm") &&
|
|
FewerFeatures(cpu_infoA["features_hvm"], cpu_infoB["features_hvm"]))
|
|
return true;
|
|
if (cpu_infoA.ContainsKey("features_pv") && cpu_infoB.ContainsKey("features_pv") &&
|
|
FewerFeatures(cpu_infoA["features_pv"], cpu_infoB["features_pv"]))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
public static bool FewerFeatures(string featureSetA, string featureSetB)
|
|
{
|
|
if (string.IsNullOrEmpty(featureSetA) || string.IsNullOrEmpty(featureSetB))
|
|
return false;
|
|
|
|
string stringA = featureSetA.Replace(" ", "");
|
|
stringA = stringA.Replace("-", "");
|
|
string stringB = featureSetB.Replace(" ", "");
|
|
stringB = stringB.Replace("-", "");
|
|
|
|
if (stringA.Length < stringB.Length)
|
|
stringA = stringA.PadRight(stringB.Length, '0');
|
|
if (stringB.Length < stringA.Length)
|
|
stringB = stringB.PadRight(stringA.Length, '0');
|
|
|
|
for (int i = 0; i < stringA.Length / 8; ++i)
|
|
{
|
|
uint intA = Convert.ToUInt32(stringA.Substring(8 * i, 8), 16);
|
|
uint intB = Convert.ToUInt32(stringB.Substring(8 * i, 8), 16);
|
|
|
|
if ((intA & intB) != intB)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|