Add support of IpAddressMap in RedisSentinel to map internal ips to external ips

Author: mythz

src/ServiceStack.Redis/RedisSentinel.cs

@@ -39,6 +39,8 @@ public string MasterName
         public Action<Exception> OnWorkerError { get; set; }
         public Action<string, string> OnSentinelMessageReceived { get; set; }
 
+        public Dictionary<string, string> IpAddressMap { get; set; } 
+
         public RedisSentinel(string sentinelHost = null, string masterName = null)
             : this(new[] { sentinelHost ?? DefaultAddress }, masterName ?? DefaultMasterName) { }
 
@@ -50,6 +52,7 @@ public RedisSentinel(IEnumerable<string> sentinelHosts, string masterName = null
 
             this.masterName = masterName ?? DefaultMasterName;
             this.RedisManagerFactory = new RedisManagerFactory();
+            IpAddressMap = new Dictionary<string, string>();
         }
 
         /// <summary>

src/ServiceStack.Redis/RedisSentinelWorker.cs

@@ -172,7 +172,12 @@ private List<string> ConvertSlaveArrayToList(object[] slaves)
                 data.TryGetValue("ip", out ip);
                 data.TryGetValue("port", out port);
 
-                if (ip == "127.0.0.1")
+                string externalIp;
+                if (redisSentinel.IpAddressMap.TryGetValue(ip, out externalIp))
+                {
+                    ip = externalIp;
+                }
+                else if (ip == "127.0.0.1")
                 {
                     ip = this.sentinelClient.Host;
                 }
@@ -202,6 +207,12 @@ private List<string> ConvertMasterArrayToList(object[] items)
             data.TryGetValue("ip", out ip);
             data.TryGetValue("port", out port);
 
+            string externalIp;
+            if (redisSentinel.IpAddressMap.TryGetValue(ip, out externalIp))
+            {
+                ip = externalIp;
+            }
+
             if (ip != null && port != null)
             {
                 servers.Add("{0}:{1}".Fmt(ip, port));