CLOUDSTACK-6401: [hyper-v] fixed correct host state, if host is up and hyper-v agent is down then the host state will be shown as up(actual host state) in cloudstack

plugins/hypervisors/hyperv/DotNet/ServerResource/HypervResource/HypervResource.csproj

@@ -87,6 +87,11 @@
     <None Include="packages.config" />
   </ItemGroup>
   <ItemGroup>
+    <None Include="heartbeat.bat">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
     <ProjectReference Include="..\WmiWrappers\WmiWrappers.csproj">
       <Project>{db824727-bdc3-437c-a364-7a811d8a160f}</Project>
       <Name>WmiWrappers</Name>

plugins/hypervisors/hyperv/DotNet/ServerResource/HypervResource/HypervResourceController.cs

@@ -107,6 +107,21 @@ namespace HypervResource
             config.Save(ConfigurationSaveMode.Modified);
             ConfigurationManager.RefreshSection("appSettings");
         }
+
+        public List<string> getAllPrimaryStorages()
+        {
+            List<string> poolPaths = new List<string>();
+            Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
+            KeyValueConfigurationCollection settings = config.AppSettings.Settings;
+            foreach (string key in settings.AllKeys)
+            {
+                if (key.Contains("primary_storage_"))
+                {
+                    poolPaths.Add(settings[key].Value);
+                }
+            }
+            return poolPaths;
+        }
     }
 
     /// <summary>
@@ -775,16 +790,67 @@ namespace HypervResource
             using (log4net.NDC.Push(Guid.NewGuid().ToString()))
             {
                 logger.Info(CloudStackTypes.CheckOnHostCommand + Utils.CleanString(cmd.ToString()));
+                string details = "host is not alive";
+                bool result = true;
+                try
+                {
+                    foreach (string poolPath in config.getAllPrimaryStorages())
+                    {
+                        if (IsHostAlive(poolPath, (string)cmd.host.privateNetwork.ip))
+                        {
+                            result = false;
+                            details = "host is alive";
+                            break;
+                        }
+                    }
+                }
+                catch (Exception e)
+                {
+                    logger.Error("Error Occurred in " + CloudStackTypes.CheckOnHostCommand + " : " + e.Message);
+                }
+
                 object ansContent = new
                 {
-                    result = true,
-                    details = "resource is alive",
+                    result = result,
+                    details = details,
                     contextMap = contextMap
                 };
                 return ReturnCloudStackTypedJArray(ansContent, CloudStackTypes.CheckOnHostAnswer);
             }
         }
 
+        private bool IsHostAlive(string poolPath, string privateIp)
+        {
+            bool hostAlive = false;
+            try
+            {
+                string hbFile = Path.Combine(poolPath, "hb-" + privateIp);
+                FileInfo file = new FileInfo(hbFile);
+                using (StreamReader sr = file.OpenText())
+                {
+                    string epoch = sr.ReadLine();
+                    string[] dateTime = epoch.Split('@');
+                    string[] date = dateTime[0].Split('-');
+                    string[] time = dateTime[1].Split(':');
+                    DateTime epochTime = new DateTime(Convert.ToInt32(date[0]), Convert.ToInt32(date[1]), Convert.ToInt32(date[2]), Convert.ToInt32(time[0]),
+                        Convert.ToInt32(time[1]), Convert.ToInt32(time[2]), DateTimeKind.Utc);
+                    DateTime currentTime = DateTime.UtcNow;
+                    DateTime ThreeMinuteLaterEpoch = epochTime.AddMinutes(3);
+                    if (currentTime.CompareTo(ThreeMinuteLaterEpoch) < 0)
+                    {
+                        hostAlive = true;
+                    }
+                    sr.Close();
+                }
+            }
+            catch (Exception e)
+            {
+                logger.Info("Exception occurred in verifying host " + e.Message);
+            }
+
+            return hostAlive;
+        }
+
         // POST api/HypervResource/CheckSshCommand
         // TODO: create test
         [HttpPost]
@@ -956,6 +1022,27 @@ namespace HypervResource
                     contextMap = contextMap
                 };
 
+                if (result)
+                {
+                    try
+                    {
+                        if ((bool)cmd.add)
+                        {
+                            logger.Info("Adding HeartBeat Task to task scheduler for pool " + (string)cmd.pool.uuid);
+                            Utils.AddHeartBeatTask((string)cmd.pool.uuid, hostPath, config.PrivateIpAddress);
+                        }
+                        else
+                        {
+                            logger.Info("Deleting HeartBeat Task from task scheduler for pool " + (string)cmd.pool.uuid);
+                            Utils.RemoveHeartBeatTask(cmd.pool.uuid);
+                        }
+                    }
+                    catch (Exception e)
+                    {
+                        logger.Error("Error occurred in adding/delete HeartBeat Task to/from Task Scheduler : " + e.Message);
+                    }
+                }
+
                 return ReturnCloudStackTypedJArray(ansContent, CloudStackTypes.ModifyStoragePoolAnswer);
             }
         }
@@ -2151,6 +2238,7 @@ namespace HypervResource
 
                 // Insert networking details
                 string privateIpAddress = strtRouteCmd.privateIpAddress;
+                config.PrivateIpAddress = privateIpAddress;
                 string subnet;
                 System.Net.NetworkInformation.NetworkInterface privateNic = GetNicInfoFromIpAddress(privateIpAddress, out subnet);
                 strtRouteCmd.privateIpAddress = privateIpAddress;

plugins/hypervisors/hyperv/DotNet/ServerResource/HypervResource/Utils.cs

@@ -24,6 +24,8 @@ using System.Runtime.InteropServices;
 using System.Security.Principal;
 using System.Text;
 using System.Threading.Tasks;
+using System.Diagnostics;
+using System.Reflection;
 
 namespace HypervResource
 {
@@ -31,6 +33,9 @@ namespace HypervResource
     {
         private static ILog s_logger = LogManager.GetLogger(typeof(Utils));
 
+        private const string TASK_PREFIX = "cloudstack-heartbeat-";
+        private const string BATCH_FILE = "heartbeat.bat";
+
         /// <summary>
         /// Associate CloudStack object's content with a fully qualified type name.
         /// </summary>
@@ -174,6 +179,44 @@ namespace HypervResource
             return cleanString;
         }
 
+        public static void AddHeartBeatTask(string poolGuid, string poolPath, string hostPrivateIp)
+        {
+            string taskName = TASK_PREFIX + poolGuid;
+            UriBuilder uri = new UriBuilder(Assembly.GetExecutingAssembly().CodeBase);
+            string alocation = Uri.UnescapeDataString(uri.Path);
+            string batchFileLocation = Path.Combine(Path.GetDirectoryName(alocation), BATCH_FILE);
+            string hbFile = Path.Combine(poolPath, "hb-" + hostPrivateIp);
+            ExecuteTask("schtasks.exe", "/Create /RU \"SYSTEM\" /SC MINUTE /MO 1 /TN " + taskName + " /F /TR \"" + batchFileLocation + " " + hbFile + "\"");
+        }
+
+        public static void RemoveHeartBeatTask(string poolGuid)
+        {
+            string taskName = TASK_PREFIX + poolGuid;
+            ExecuteTask("schtasks.exe", "/Delete /TN " + taskName + " /F");
+        }
+
+        public static void ExecuteTask(string command, string args)
+        {
+            ProcessStartInfo startInfo = new ProcessStartInfo();
+            startInfo.CreateNoWindow = false;
+            startInfo.UseShellExecute = true;
+            startInfo.FileName = command;
+            startInfo.WindowStyle = ProcessWindowStyle.Hidden;
+            startInfo.Arguments = args;
+
+            try
+            {
+                using (Process exeProcess = Process.Start(startInfo))
+                {
+                    exeProcess.WaitForExit();
+                }
+            }
+            catch (Exception e)
+            {
+                s_logger.Error("Error occurred in deleting or adding a scheduled task " + e.Message);
+            }
+        }
+
         // from http://stackoverflow.com/a/2541569/939250
         #region imports
         [DllImport("advapi32.dll", SetLastError = true)]

plugins/hypervisors/hyperv/DotNet/ServerResource/HypervResource/heartbeat.bat

@@ -0,0 +1,23 @@
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM
+@echo off
+@REM This script is based on:
+@REM http://stackoverflow.com/questions/9871499/how-to-get-utc-time-with-windows-batch-file
+
+for /f %%x in ('wmic path win32_utctime get /format:list ^| findstr "="') do set %%x
+echo %Year%-%Month%-%Day%@%Hour%:%Minute%:%Second%>%1