No internet from within local Service Fabric Mesh Container

[CasperJ]

Hi. I tried posting my issue on Stackoverflow, but I didn't get much love there - so now I'm trying here :)

I'm playing around with Service Fabric Mesh on my local PC, but I'm struggling with internet access from within a (Windows) Container.

I'm using the standard web app template from Visual Studio 2017:

public static async Task<int> Main(string[] args)
    {
        try
        {
            var test = await (new System.Net.Http.HttpClient()).GetStringAsync("http://google.com");
            Console.WriteLine(test);

You would expect some HTML to be printed out but I get this exception:

System.Net.Http.HttpRequestException: No such host is known ---> System.Net.Sockets.SocketException: No such host is known at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken) --- End of inner exception stack trace --- at System.Net.Http.ConnectHelper.ConnectAsync(String host, Int32 port, CancellationToken cancellationToken) at System.Threading.Tasks.ValueTask`1.get_Result() at System.Net.Http.HttpConnectionPool.CreateConnectionAsync(HttpRequestMessage request, CancellationToken cancellationToken) at System.Threading.Tasks.ValueTask`1.get_Result() at System.Net.Http.HttpConnectionPool.WaitForCreatedConnectionAsync(ValueTask`1 creationTask) at System.Threading.Tasks.ValueTask`1.get_Result() at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken) at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) at System.Net.Http.HttpClient.FinishSendAsyncUnbuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts) at System.Net.Http.HttpClient.GetStringAsyncCore(Task`1 getTask) at Web1.Program.Main(String[] args)

The base docker image used is microsoft/dotnet:2.1-aspnetcore-runtime-nanoserver-1709 and if I run: docker run microsoft/dotnet:2.1-aspnetcore-runtime-nanoserver-1709 ping google.com then I get:

PS C:\Windows\system32> docker run microsoft/dotnet:2.1-aspnetcore-runtime-nanoserver-1709 ping google.com

Pinging google.com [172.217.168.238] with 32 bytes of data:
Reply from 172.217.168.238: bytes=32 time=16ms TTL=56
Reply from 172.217.168.238: bytes=32 time=15ms TTL=56
Reply from 172.217.168.238: bytes=32 time=15ms TTL=56
Reply from 172.217.168.238: bytes=32 time=16ms TTL=56

Ping statistics for 172.217.168.238:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 15ms, Maximum = 16ms, Average = 15ms

When I run the Docker image directly I get:

PS C:\Users\XXX> docker run microsoft/dotnet:2.1-aspnetcore-runtime-nanoserver-1803 ipconfig.exe /all

Windows IP Configuration

   Host Name . . . . . . . . . . . . : XXX
   Primary Dns Suffix  . . . . . . . :
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : XXX

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : XXX
   Description . . . . . . . . . . . : Microsoft Hyper-V Network Adapter
   Physical Address. . . . . . . . . : 00-15-5D-38-EE-09
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::1c14:1ec3:9b85:5f56%4(Preferred)
   IPv4 Address. . . . . . . . . . . : 172.20.192.4(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.240.0
   Default Gateway . . . . . . . . . : 172.20.192.1
   DHCPv6 IAID . . . . . . . . . . . : 67114333
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-23-7C-13-F1-00-15-5D-38-EE-09
   DNS Servers . . . . . . . . . . . : 172.20.192.1
                                       10.10.0.184 <-- IP of my local machine
                                       10.10.0.1 <-- My router
   NetBIOS over Tcpip. . . . . . . . : Disabled

If I do the same (System.Diagnostics.Process.Start("ipconfig.exe", "/all");) inside the code running in Service Fabric:

Windows IP Configuration

   Host Name . . . . . . . . . . . . : 0ded1f75fa51
   Primary Dns Suffix  . . . . . . . : 
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : Application1

Ethernet adapter Ethernet:

   Connection-specific DNS Suffix  . : XXX
   Description . . . . . . . . . . . : Microsoft Hyper-V Network Adapter
   Physical Address. . . . . . . . . : 00-15-5D-38-E5-2C
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::1d25:4204:2cd4:1bb0%4(Preferred) 
   IPv4 Address. . . . . . . . . . . : 172.20.202.176(Preferred) 
   Subnet Mask . . . . . . . . . . . : 255.255.240.0
   Default Gateway . . . . . . . . . : 172.20.192.1
   DHCPv6 IAID . . . . . . . . . . . : 67114333
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-23-7C-11-32-00-15-5D-38-E5-2C
   DNS Servers . . . . . . . . . . . : 172.20.192.1
                                       10.10.0.184
   NetBIOS over Tcpip. . . . . . . . : Disabled

As you can see 10.10.0.1 (my router/gateway is missing as a DNS Server in the last dump). How do I add that or what am I doing wrong?

[mattrowmsft]

Updated my SO tags to watch :-) Vivek might know what is going on.

[mikkelhegn]

There's a set of known limitations with DNS on Windows 10 and Service Fabric: https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-how-to-debug-windows-containers#known-limitations-when-debugging-containers-in-service-fabric - please check these.

[guibirow]

Might be related to #302