draft of support in new record set

Author: karravi-msft

src/ResourceManager/Dns/Commands.Dns/Models/DnsClient.cs

@@ -172,9 +172,10 @@ public DnsRecordSet CreateDnsRecordSet(
             RecordType recordType,
             Hashtable tags,
             bool overwrite,
-            DnsRecordBase[] resourceRecords)
+            DnsRecordBase[] resourceRecords,
+            string aliasTargetResourceId)
         {
-            var recordSet = ConstructRecordSetPropeties(relativeRecordSetName, recordType, ttl, tags, resourceRecords);
+            var recordSet = ConstructRecordSetPropeties(relativeRecordSetName, recordType, ttl, tags, resourceRecords, aliasTargetResourceId);
 
             var response = this.DnsManagementClient.RecordSets.CreateOrUpdate(
                 resourceGroupName,
@@ -188,13 +189,19 @@ public DnsRecordSet CreateDnsRecordSet(
             return GetPowerShellRecordSet(zoneName, resourceGroupName, response);
         }
 
-        private RecordSet ConstructRecordSetPropeties(string recordSetName, RecordType recordType, uint ttl, Hashtable tags, DnsRecordBase[] resourceRecords)
+        private RecordSet ConstructRecordSetPropeties(
+            string recordSetName,
+            RecordType recordType,
+            uint ttl,
+            Hashtable tags,
+            DnsRecordBase[] resourceRecords,
+            string aliasTargetResourceId)
         {
 
             var properties = new RecordSet
             {
                 Metadata = TagsConversionHelper.CreateTagDictionary(tags, validate: true),
-                TTL = ttl,
+                TTL = ttl
             };
 
             if (resourceRecords != null && resourceRecords.Length != 0)
@@ -211,6 +218,11 @@ private RecordSet ConstructRecordSetPropeties(string recordSetName, RecordType r
             else
             {
                 FillEmptyRecordsForType( properties, recordType);
+
+                if (string.IsNullOrEmpty(aliasTargetResourceId))
+                {
+                    properties.TargetResource = new SubResource(aliasTargetResourceId);
+                }
             }
             return properties;
         }
@@ -431,6 +443,7 @@ private static DnsRecordSet GetPowerShellRecordSet(string zoneName, string resou
                 ResourceGroupName = resourceGroupName,
                 Ttl = (uint) mamlRecordSet.TTL.GetValueOrDefault(),
                 ZoneName = zoneName,
+                AliasTargetResourceId = mamlRecordSet.TargetResource != null ? mamlRecordSet.TargetResource.Id : string.Empty
             };
         }
 

src/ResourceManager/Dns/Commands.Dns/Models/DnsRecordSet.cs

@@ -56,6 +56,11 @@ public class DnsRecordSet : ICloneable
         /// </summary>
         public RecordType RecordType { get; set; }
 
+        /// <summary>
+        /// Gets or sets the alias target resource Id of the record set
+        /// </summary>
+        public string AliasTargetResourceId { get; set; }
+
         /// <summary>
         /// Gets or sets the list of records in this record set.
         /// </summary>

src/ResourceManager/Dns/Commands.Dns/Records/NewAzureDnsRecordSet.cs

@@ -64,6 +64,9 @@ public class NewAzureDnsRecordSet : DnsBaseCmdlet
         [Parameter(Mandatory = false, HelpMessage = "Do not fail if the record set already exists.")]
         public SwitchParameter Overwrite { get; set; }
 
+        [Parameter(Mandatory = false, HelpMessage = "Alias Target Resource Id.")]
+        public string AliasTargetResourceId { get; set; }
+
         public override void ExecuteCmdlet()
         {
             string zoneName = null;
@@ -106,7 +109,16 @@ public override void ExecuteCmdlet()
                 this.Name,
                 () =>
                 {
-                    result = this.DnsClient.CreateDnsRecordSet(zoneName, resourceGroupname, this.Name, this.Ttl, this.RecordType, this.Metadata, this.Overwrite, this.DnsRecords);
+                    result = this.DnsClient.CreateDnsRecordSet(
+                        zoneName,
+                        resourceGroupname,
+                        this.Name, 
+                        this.Ttl,
+                        this.RecordType,
+                        this.Metadata,
+                        this.Overwrite,
+                        this.DnsRecords,
+                        this.AliasTargetResourceId);
 
                     if (result != null)
                     {