[Aks]Add new switch GenerateSshKey to generate SSH keys if necessary

src/Aks/Aks/ChangeLog.md

@@ -18,7 +18,8 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
-* Update api version to 2020-06-01.
+* Added parameter `GenerateSshKey` for `New-AzAksCluster`.
+* Updated api version to 2020-06-01.
 
 ## Version 1.2.0
 * Removed `ClientIdAndSecret` to `ServicePrincipalIdAndSecret` and set `ClientIdAndSecret` as an alias [#12381].

src/Aks/Aks/Commands/NewAzureRmAks.cs

@@ -13,7 +13,11 @@
 // ----------------------------------------------------------------------------------
 
 using System;
+using System.Diagnostics;
+using System.IO;
 using System.Management.Automation;
+using System.Runtime.InteropServices;
+
 using Microsoft.Azure.Commands.Aks.Models;
 using Microsoft.Azure.Commands.Aks.Properties;
 using Microsoft.Azure.Management.ContainerService;
@@ -31,10 +35,16 @@ public class NewAzureRmAks : NewKubeBase
         [Parameter(Mandatory = false, HelpMessage = "Create cluster even if it already exists")]
         public SwitchParameter Force { get; set; }
 
+        [Parameter(
+            Mandatory = false,
+            HelpMessage = "Generate ssh key file to {HOME}/.ssh/id_rsa.")]
+        public SwitchParameter GenerateSshKey { get; set; }
+
         public override void ExecuteCmdlet()
         {
             base.ExecuteCmdlet();
             PreValidate();
+            PrepareParameter();
 
             Action action = () =>
             {
@@ -72,6 +82,76 @@ private void PreValidate()
             if ((this.IsParameterBound(c => c.NodeMinCount) || this.IsParameterBound(c => c.NodeMaxCount) || this.EnableNodeAutoScaling.IsPresent) &&
                 !(this.IsParameterBound(c => c.NodeMinCount) && this.IsParameterBound(c => c.NodeMaxCount) && this.EnableNodeAutoScaling.IsPresent))
                 throw new PSInvalidCastException(Resources.AksNodePoolAutoScalingParametersMustAppearTogether);
+
+            if (this.IsParameterBound(c => c.GenerateSshKey) && this.IsParameterBound(c => c.SshKeyValue))
+            {
+                throw new ArgumentException(string.Format(Resources.DonotUseGenerateSshKeyWithSshKeyValue));
+            }
+        }
+
+        private void VerifySshKeyGenBinaryExist()
+        {
+            using (Process process = new Process())
+            {
+                if ((RuntimeInformation.IsOSPlatform(OSPlatform.Windows)))
+                {
+                    process.StartInfo.FileName = "where.exe";
+                }
+                else
+                {
+                    process.StartInfo.FileName = "whereis";
+                }
+                process.StartInfo.Arguments = "ssh-keygen";
+                process.StartInfo.UseShellExecute = false;
+                process.StartInfo.RedirectStandardOutput = true;
+
+                process.Start();
+                process.WaitForExit();
+
+                string result = process.StandardOutput.ReadLine();
+                if (result.Contains("not found") || result.Contains("Could not find") || result.Trim().Equals("ssh-keygen:"))
+                {
+                    throw new ArgumentException(Resources.EnableSsh);
+                }
+
+                if (process.ExitCode != 0)
+                {
+                    throw new ArgumentException(Resources.EnableSsh);
+                }
+            }
+        }
+
+        private string GenerateSshKeyValue()
+        {
+            VerifySshKeyGenBinaryExist();
+            String generateSshKeyPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), ".ssh", "id_rsa"); ;
+            if (File.Exists(generateSshKeyPath))
+            {
+                throw new ArgumentException(string.Format(Resources.DefaultSshKeyAlreadyExist));
+            }
+            using (Process process = new Process())
+            {
+                process.StartInfo.FileName = "ssh-keygen";
+                process.StartInfo.Arguments = String.Format("-f \"{0}\"", generateSshKeyPath);
+                process.StartInfo.UseShellExecute = false;
+                process.StartInfo.RedirectStandardInput = true;
+                process.StartInfo.RedirectStandardError = true;
+                process.StartInfo.RedirectStandardOutput = true;
+                process.Start();
+
+                Console.WriteLine(process.StandardOutput.ReadToEnd());
+
+                process.WaitForExit();
+            }
+            return GetSshKey(generateSshKeyPath);
+        }
+
+        protected void PrepareParameter()
+        {
+            if (this.IsParameterBound(c => c.GenerateSshKey))
+            {
+                SshKeyValue = GenerateSshKeyValue();
+            }
         }
     }
 }

src/Aks/Aks/Properties/Resources.resx

@@ -369,6 +369,15 @@
   <data name="WindowsNodePoolNameLengthLimitation" xml:space="preserve">
     <value>Windows agent pool name can not be longer than 6 characters.</value>
   </data>
+  <data name="DonotUseGenerateSshKeyWithSshKeyValue" xml:space="preserve">
+    <value>Don't use -GenerateSshKey and -SshKeyVaule at the same time.</value>
+  </data>
+  <data name="DefaultSshKeyAlreadyExist" xml:space="preserve">
+    <value>Default ssh key already exists. Please use -SshKeyVaule.</value>
+  </data>
+  <data name="EnableSsh" xml:space="preserve">
+    <value>Cannot find ssh-keygen. Please enable OpenSSH on your local machine.</value>
+  </data>
   <data name="UpdatingNodePoolMode" xml:space="preserve">
     <value>Updating NodePoolMode.</value>
   </data>

src/Aks/Aks/help/Az.Aks.md

@@ -49,3 +49,4 @@ Stop the Kubectl SSH tunnel created in Start-AzKubernetesDashboard.
 
 ### [Update-AzAksNodePool](Update-AzAksNodePool.md)
 Update node pool in a managed cluster.
+

src/Aks/Aks/help/New-AzAksCluster.md

@@ -21,7 +21,7 @@ New-AzAksCluster [-Force] [-NodeVmSetType <String>] [-NodeVnetSubnetID <String>]
  [[-ServicePrincipalIdAndSecret] <PSCredential>] [-Location <String>] [-LinuxProfileAdminUserName <String>]
  [-DnsNamePrefix <String>] [-KubernetesVersion <String>] [-NodeName <String>] [-NodeMinCount <Int32>]
  [-NodeMaxCount <Int32>] [-EnableNodeAutoScaling] [-NodeCount <Int32>] [-NodeOsDiskSize <Int32>]
- [-NodeVmSize <String>] [-SshKeyValue <String>] [-AsJob] [-Tag <Hashtable>]
+ [-NodeVmSize <String>] [-SshKeyValue <String>] [-GenerateSshKey] [-AsJob] [-Tag <Hashtable>]
  [-DefaultProfile <IAzureContextContainer>] [-WhatIf] [-Confirm] [<CommonParameters>]
 ```
 
@@ -154,6 +154,21 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -GenerateSshKey
+Generate ssh key file to {HOME}/.ssh/id_rsa.
+
+```yaml
+Type: System.Management.Automation.SwitchParameter
+Parameter Sets: (All)
+Aliases:
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### -KubernetesVersion
 The version of Kubernetes to use for creating the cluster.