Azure Virtual Machine 之 如何利用Management Class Libraries 创建VM

之前发的blog简单的介绍了如何使用Management Class Libraries 来控制Azure platform。

但由于官方并没有提供文档，所以我们只能够通过自己研究来摸索使用该类库的方法。

在使用过程中我发现可以再抽象出一层中间层，从而让该类库的使用更趋近于Management REST API。

下面以创建一个Virtual Machine 为例让我们来了解如何使用该类库来操作Virtual Machine

首先我们要知道，在Azure Platform中，任何一个VM Instance都要运行在一个HostedService 里面的Deployment下面的。

所以在使用过程中我们需要首先创建一个Hosted Service。

我们可以通过以下两个方法来进行创建：

  public static void createCloudServiceByLocation(string cloudServiceName, string location)
        {
            ComputeManagementClient client = new ComputeManagementClient(getCredentials());
            HostedServiceCreateParameters hostedServiceCreateParams = new HostedServiceCreateParameters
            {
                ServiceName = cloudServiceName,
                Location = location,
                Label = EncodeToBase64(cloudServiceName),
            };
            try
            {
                client.HostedServices.Create(hostedServiceCreateParams);
            }
            catch (CloudException e)
            {
                throw e;
            }

        }
        public static void createCloudServiceByAffinityGroup(string cloudServiceName, string affinityGroupName)
        {
            ComputeManagementClient client = new ComputeManagementClient(getCredentials());
            HostedServiceCreateParameters hostedServiceCreateParams = new HostedServiceCreateParameters
            {
                ServiceName = cloudServiceName,
                AffinityGroup = affinityGroupName,
                Label = EncodeToBase64(cloudServiceName),
            };
            try
            {
                client.HostedServices.Create(hostedServiceCreateParams);
            }
            catch (CloudException e)
            {
                throw e;
            }

        }

在有了HostedService之后，我们可以通过两种方式来创建VM。

第一种：首先创建一个Deployment，然后再通过添加角色来向这个Deployment中添加Virtual Machine，这样需要与Azure平台交互两次。

第二种：直接调用创建虚拟机部署，这样将在一个Request中创建一个虚拟机的Deployment并且将添加1或多个Virtual Machine到该Deployment下面。

我们可以通过创建自己的Extension Class Library来使得操作更趋向于REST API，一下是我抽象层的代码：

public static class MyVirtualMachineExtension
    {
        /// <summary>
        /// Instantiation a new VM Role
        /// </summary>
        public static Role CreateVMRole(this IVirtualMachineOperations client, string cloudServiceName, string roleName, VirtualMachineRoleSize roleSize, string userName, string password, OSVirtualHardDisk osVHD)
        {
            Role vmRole = new Role
            {
                RoleType = VirtualMachineRoleType.PersistentVMRole.ToString(),
                RoleName = roleName,
                Label = roleName,
                RoleSize = roleSize,
                ConfigurationSets = new List<ConfigurationSet>(),
                OSVirtualHardDisk = osVHD
            };
            ConfigurationSet configSet = new ConfigurationSet
            {
                ConfigurationSetType = ConfigurationSetTypes.WindowsProvisioningConfiguration,
                EnableAutomaticUpdates = true,
                ResetPasswordOnFirstLogon = false,
                ComputerName = roleName,
                AdminUserName = userName,
                AdminPassword = password,
                InputEndpoints = new BindingList<InputEndpoint>
                {
                    new InputEndpoint { LocalPort = 3389, Name = "RDP", Protocol = "tcp" },
                    new InputEndpoint { LocalPort = 80, Port = 80, Name = "web", Protocol = "tcp" }
                }
            };
            vmRole.ConfigurationSets.Add(configSet);
            return vmRole;
        }

        public static OSVirtualHardDisk CreateOSVHD(this IVirtualMachineImageOperations operation, string cloudserviceName, string vmName, string storageAccount, string imageFamiliyName)
        {
            try
            {
                var osVHD = new OSVirtualHardDisk
                {
                    MediaLink = GetVhdUri(string.Format("{0}.blob.core.windows.net/vhds", storageAccount), cloudserviceName, vmName),
                    SourceImageName = GetSourceImageNameByFamliyName(operation, imageFamiliyName)
                };
                return osVHD;
            }
            catch (CloudException e)
            {

                throw e;
            }

        }

        private static string GetSourceImageNameByFamliyName(this IVirtualMachineImageOperations operation, string imageFamliyName)
        {
            var disk = operation.List().Where(o => o.ImageFamily == imageFamliyName).FirstOrDefault();
            if (disk != null)
            {
                return disk.Name;
            }
            else
            {
                throw new CloudException(string.Format("Can't find {0} OS image in current subscription"));
            }
        }

        private static Uri GetVhdUri(string blobcontainerAddress, string cloudServiceName, string vmName, bool cacheDisk = false, bool https = false)
        {
            var now = DateTime.UtcNow;
            string dateString = now.Year + "-" + now.Month + "-" + now.Day;

            var address = string.Format("http{0}://{1}/{2}-{3}-{4}-{5}-650.vhd", https ? "s" : string.Empty, blobcontainerAddress, cloudServiceName, vmName, cacheDisk ? "-CacheDisk" : string.Empty, dateString);
            return new Uri(address);
        }

        public static void CreateVMDeployment(this IVirtualMachineOperations operations, string cloudServiceName, string deploymentName, List<Role> roleList, DeploymentSlot slot = DeploymentSlot.Production)
        {

            try
            {
                VirtualMachineCreateDeploymentParameters createDeploymentParams = new VirtualMachineCreateDeploymentParameters
                {

                    Name = deploymentName,
                    Label = cloudServiceName,
                    Roles = roleList,
                    DeploymentSlot = slot
                };
                operations.CreateDeployment(cloudServiceName, createDeploymentParams);
            }
            catch (CloudException e)
            {
                throw e;
            }
        }

        public static void AddRole(this IVirtualMachineOperations operations, string cloudServiceName, string deploymentName, Role role, DeploymentSlot slot = DeploymentSlot.Production)
        {
            try
            {
                VirtualMachineCreateParameters createParams = new VirtualMachineCreateParameters
                {
                    RoleName = role.Label,
                    RoleSize = role.RoleSize,
                    OSVirtualHardDisk = role.OSVirtualHardDisk,
                    ConfigurationSets = role.ConfigurationSets,
                    AvailabilitySetName = role.AvailabilitySetName,
                    DataVirtualHardDisks = role.DataVirtualHardDisks
                };

                operations.Create(cloudServiceName, deploymentName, createParams);
            }
            catch (CloudException e)
            {
                throw e;
            }
           
        }
    }

整体programe代码如下：

 class Program
    {
       
        public const string base64EncodedCertificate = "";
        public const string subscriptionId = "";

        public static string vmName = "Azure111";
        public static string location = "East Asia";
        public static string storageAccountName = "superdino";
        public static string userName = "Dino";
        public static string password = "PassWord1！";

        public static string imageFamiliyName = "Windows Server 2012 Datacenter";

        
        static void Main(string[] args)
        {
            ComputeManagementClient client = new ComputeManagementClient(getCredentials());
            //You need a hosted service host VM.
            try
            {
                client.HostedServices.Get(vmName);
            }
            catch (CloudException e)
            {
                createCloudServiceByLocation(vmName, location);
            }
            

            var OSVHD = client.VirtualMachineImages.CreateOSVHD(vmName, vmName, storageAccountName, imageFamiliyName);
            var VMROle = client.VirtualMachines.CreateVMRole(vmName, vmName, VirtualMachineRoleSize.Small, userName, password, OSVHD);
            List<Role> roleList = new List<Role>{
                VMROle
            };
            client.VirtualMachines.CreateVMDeployment(vmName, vmName, roleList);
            Console.WriteLine("Create VM success");
            client.VirtualMachines.AddRole("CloudServiceName", "ExsitDeploymentName", VMROle);

            Console.ReadLine();
        }

        public static void createCloudServiceByLocation(string cloudServiceName, string location)
        {
            ComputeManagementClient client = new ComputeManagementClient(getCredentials());
            HostedServiceCreateParameters hostedServiceCreateParams = new HostedServiceCreateParameters
            {
                ServiceName = cloudServiceName,
                Location = location,
                Label = EncodeToBase64(cloudServiceName),
            };
            try
            {
                client.HostedServices.Create(hostedServiceCreateParams);
            }
            catch (CloudException e)
            {
                throw e;
            }

        }
        public static void createCloudServiceByAffinityGroup(string cloudServiceName, string affinityGroupName)
        {
            ComputeManagementClient client = new ComputeManagementClient(getCredentials());
            HostedServiceCreateParameters hostedServiceCreateParams = new HostedServiceCreateParameters
            {
                ServiceName = cloudServiceName,
                AffinityGroup = affinityGroupName,
                Label = EncodeToBase64(cloudServiceName),
            };
            try
            {
                client.HostedServices.Create(hostedServiceCreateParams);
            }
            catch (CloudException e)
            {
                throw e;
            }

        }
        public static string EncodeToBase64(string toEncode)
        {
            byte[] toEncodeAsBytes
            = System.Text.ASCIIEncoding.ASCII.GetBytes(toEncode);
            string returnValue
                  = System.Convert.ToBase64String(toEncodeAsBytes);
            return returnValue;
        }

        public static SubscriptionCloudCredentials getCredentials()
        {
            return new CertificateCloudCredentials(subscriptionId, new X509Certificate2(Convert.FromBase64String(base64EncodedCertificate)));
        }

    }