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243 lines
11 KiB
C#
Executable File
243 lines
11 KiB
C#
Executable File
/* 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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using XenAdmin.Model;
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namespace XenServerHealthCheck
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{
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public class RequestUploadTask
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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 static T Get<T>(Dictionary<string, T> d, string k) where T : class
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{
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return d != null && d.ContainsKey(k) ? d[k] : null;
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}
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private static int IntKey(Dictionary<string, string> d, string k, int def)
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{
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int result;
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string s = Get(d, k);
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return s != null && int.TryParse(s, out result) ? result : def;
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}
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private static bool BoolKey(Dictionary<string, string> d, string k)
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{
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string v = Get(d, k);
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return v == null ? false : v == "true";
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}
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private static double DueAfterHour = 24;
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private static bool CanLock(string UploadLock, bool onDemand)
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{
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if (string.IsNullOrEmpty(UploadLock))
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return true;
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List<string> currentLock = new List<string>(UploadLock.Split('|'));
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DateTime currentTime = DateTime.UtcNow;
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DateTime lockTime = DateTime.Parse(currentLock[1]);
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if (currentLock[0] == Properties.Settings.Default.UUID && onDemand)
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return true;
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if (currentLock[0] == Properties.Settings.Default.UUID)
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{
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if ((DateTime.Compare(lockTime.AddHours(DueAfterHour), currentTime) <= 0))
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return true;
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}
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else if ((DateTime.Compare(lockTime.AddHours(DueAfterHour), currentTime) <= 0))
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return true;
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return false;
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}
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private static int SleepForLockConfirm = 10 * 1000; // 10 seconds
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private static bool getLock(IXenConnection connection, Session session)
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{
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Dictionary<string, string> config = Pool.get_health_check_config(session, connection.Cache.Pools[0].opaque_ref);
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string newUploadLock = Properties.Settings.Default.UUID;
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newUploadLock += "|" + HealthCheckSettings.DateTimeToString(DateTime.UtcNow);
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config[HealthCheckSettings.UPLOAD_LOCK] = newUploadLock;
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Pool.set_health_check_config(session, connection.Cache.Pools[0].opaque_ref, config);
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System.Threading.Thread.Sleep(SleepForLockConfirm);
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config = Pool.get_health_check_config(session, connection.Cache.Pools[0].opaque_ref);
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return config[HealthCheckSettings.UPLOAD_LOCK] == newUploadLock;
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}
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public static bool Request(IXenConnection connection, Session session)
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{
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bool needRetry = false;
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Dictionary<string, string> config = Pool.get_health_check_config(session, connection.Cache.Pools[0].opaque_ref);
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if (BoolKey(config, HealthCheckSettings.STATUS) == false)
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{
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ServerListHelper.instance.removeServerCredential(connection.Hostname);
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log.InfoFormat("Will not report for XenServer {0} that was not Enroll", connection.Hostname);
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return false;
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}
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//Check if there already some service doing the uploading already
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if (CanLock(Get(config, HealthCheckSettings.UPLOAD_LOCK), false) == false)
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{
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log.InfoFormat("Will not report for XenServer {0} that already locked", connection.Hostname);
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return false;
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}
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//No Lock has been set before, Check upload is due
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int intervalInDays = IntKey(config, HealthCheckSettings.INTERVAL_IN_DAYS, HealthCheckSettings.DEFAULT_INTERVAL_IN_DAYS);
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DateTime lastSuccessfulUpload = DateTime.UtcNow;
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bool haveSuccessfulUpload = false;
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if (config.ContainsKey(HealthCheckSettings.LAST_SUCCESSFUL_UPLOAD))
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{
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try
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{
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lastSuccessfulUpload = HealthCheckSettings.StringToDateTime(Get(config, HealthCheckSettings.LAST_SUCCESSFUL_UPLOAD));
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haveSuccessfulUpload = true;
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}
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catch (Exception exn)
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{
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log.Error("Catch exception when Parse LAST_SUCCESSFUL_UPLOAD", exn);
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}
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}
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if (haveSuccessfulUpload)
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{//If last successful update not due. return
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if (DateTime.Compare(DateTime.UtcNow, lastSuccessfulUpload.AddDays(intervalInDays)) < 0)
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{
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log.InfoFormat("Will not report for XenServer {0} that was not due {1} days", connection.Hostname, intervalInDays);
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return false;
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}
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}
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if (config.ContainsKey(HealthCheckSettings.LAST_FAILED_UPLOAD))
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{
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try
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{
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DateTime LastFailedUpload = HealthCheckSettings.StringToDateTime(Get(config, HealthCheckSettings.LAST_FAILED_UPLOAD));
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if (haveSuccessfulUpload)
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{
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if (DateTime.Compare(lastSuccessfulUpload, LastFailedUpload) > 0)
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return false; //A retry is not needed
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}
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int retryInterval = IntKey(config, HealthCheckSettings.RETRY_INTERVAL, HealthCheckSettings.DEFAULT_RETRY_INTERVAL);
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if (DateTime.Compare(LastFailedUpload.AddDays(retryInterval), DateTime.UtcNow) <= 0)
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{
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log.InfoFormat("Retry since retryInterval{0} - {1} > {2} meeted", LastFailedUpload, DateTime.UtcNow, retryInterval);
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needRetry = true;
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}
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else
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return false;
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}
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catch (Exception exn)
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{
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log.Error("Catch exception when check if retry was needed", exn);
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}
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}
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DateTime currentTime = DateTime.Now;
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if (!needRetry)
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{//Check if uploading schedule meet only for new upload
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DayOfWeek dayOfWeek;
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if (!Enum.TryParse(Get(config, HealthCheckSettings.DAY_OF_WEEK), out dayOfWeek))
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{
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log.Error("DAY_OF_WEEK not existed");
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return false;
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}
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if (!config.ContainsKey(HealthCheckSettings.TIME_OF_DAY))
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{
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log.Error("TIME_OF_DAY not existed");
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return false;
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}
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int TimeOfDay = IntKey(config, HealthCheckSettings.TIME_OF_DAY, HealthCheckSettings.GetDefaultTime());
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if (currentTime.DayOfWeek != dayOfWeek || currentTime.Hour != TimeOfDay)
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{
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log.InfoFormat("Will not report for XenServer {0} for incorrect schedule", connection.Hostname);
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return false;
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}
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log.InfoFormat("Upload schedule for {0} is {1}:{2}, meet current time {3}", connection.Hostname, dayOfWeek, TimeOfDay, currentTime.ToString());
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}
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return getLock(connection, session);
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}
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public static bool OnDemandRequest(IXenConnection connection, Session session)
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{
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Dictionary<string, string> config = Pool.get_health_check_config(session, connection.Cache.Pools[0].opaque_ref);
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if (BoolKey(config, HealthCheckSettings.STATUS) == false)
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{
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log.InfoFormat("Will not report on demand for XenServer {0} that was not Enroll", connection.Hostname);
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return false;
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}
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//Check if there already some service doing the uploading already
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if (CanLock(Get(config, HealthCheckSettings.UPLOAD_LOCK), true) == false)
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{
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log.InfoFormat("Will not report for XenServer {0} that already locked", connection.Hostname);
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return false;
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}
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var newUploadRequest = Get(config, HealthCheckSettings.NEW_UPLOAD_REQUEST);
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if (!string.IsNullOrEmpty(newUploadRequest))
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{
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DateTime newUploadRequestTime;
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try
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{
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newUploadRequestTime = HealthCheckSettings.StringToDateTime(newUploadRequest);
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}
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catch (Exception exn)
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{
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log.Error("Exception while parsing NEW_UPLOAD_REQUEST", exn);
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return false;
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}
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DateTime newUploadRequestDueTime = newUploadRequestTime.AddMinutes(HealthCheckSettings.UPLOAD_REQUEST_VALIDITY_INTERVAL);
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if (DateTime.Compare(newUploadRequestDueTime, DateTime.UtcNow) >= 1)
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{
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log.InfoFormat("Will report on demand for XenServer {0} since the demand was requested on {1} (UTC time)", connection.Hostname, newUploadRequestTime);
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return getLock(connection, session);
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}
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else
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{
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log.InfoFormat("Will not report on demand for XenServer {0} since the demand requested on {1} (UTC time) expired after {2} minutes",
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connection.Hostname, newUploadRequestTime, HealthCheckSettings.UPLOAD_REQUEST_VALIDITY_INTERVAL);
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return false;
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}
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}
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else
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return false;
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}
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}
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}
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