Module with Websocket or Kestrel Server not deploying to Kubernetes Cluster

I have managed to setup an instance of AKS, with namespaces linking to my Edge Devices. I deploy the modules I require and the majority of them deploy without issue. However, the two modules I have created which run a websocket server or a Kestrel server will not deploy.

Expected Behavior

The Edge Agent should pull the module, create the service, pod and any other items it needs to setup the module. The module should then be deployed and clients able to connect to it.

Current Behavior

The Edge Agent appears to try to pull the module from the repository, create a service and then throws the following exception:

2019-07-25 12:55:49.702 +00:00 [DBG] [Microsoft.Azure.Devices.Edge.Agent.Core.Agent] - Edge agent created. 
2019-07-25 12:55:49.713 +00:00 [DBG] [Microsoft.Azure.Devices.Edge.Agent.Core.Agent] - Starting reconcile operation 
2019-07-25 12:55:49.744 +00:00 [DBG] [Microsoft.Azure.Devices.Edge.Agent.Core.Agent] - Getting edge agent config... 
2019-07-25 12:55:49.843 +00:00 [DBG] [Microsoft.Azure.Devices.Edge.Agent.Kubernetes.EdgeOperator] - Deployment 'iothub1.azure-devices.net-edgedevice1', status'Added' 
2019-07-25 12:55:49.857 +00:00 [DBG] [Microsoft.Azure.Devices.Edge.Agent.Kubernetes.EdgeOperator] - Expected a valid '' creation string in k8s Object 'edgeagent'. 
2019-07-25 12:55:50.004 +00:00 [DBG] [Microsoft.Azure.Devices.Edge.Agent.Kubernetes.EdgeOperator] - Creating service object 'websocketmodule' 
2019-07-25 12:55:50.012 +00:00 [DBG] [Microsoft.Azure.Devices.Edge.Agent.Kubernetes.EdgeOperator] - Creating edge deployment 'websocketmodule' 
2019-07-25 12:55:50.013 +00:00 [INF] [Microsoft.Azure.Devices.Edge.Agent.Kubernetes.EdgeOperator] - Creating service websocketmodule
Unhandled Exception: Microsoft.Rest.HttpOperationException: Operation returned an invalid status code 'UnprocessableEntity' 
   at k8s.Kubernetes.CreateNamespacedServiceWithHttpMessagesAsync(V1Service body, String namespaceParameter, String pretty, Dictionary`2 customHeaders, CancellationToken cancellationToken) 
   at k8s.KubernetesExtensions.CreateNamespacedServiceAsync(IKubernetes operations, V1Service body, String namespaceParameter, String pretty, CancellationToken cancellationToken) 
   at Microsoft.Azure.Devices.Edge.Agent.Kubernetes.EdgeOperator.ManageDeployments(V1ServiceList currentServices, V1DeploymentList currentDeployments, EdgeDeploymentDefinition customObject) in /home/vsts/work/1/s/edge-agent/src/Microsoft.Azure.Devices.Edge.Agent.Kubernetes/EdgeOperator.cs:line 732 
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) 
--- End of stack trace from previous location where exception was thrown --- 
   at System.Threading.ThreadPoolWorkQueue.Dispatch()

Steps to Reproduce

1. Install IoTEdge onto Kubernetes cluster using edgek8s/edge-kubernetes
2. Create namespace linked to Edge Device
3. Add modules to be deployed
4. Add websocket or Kestrel module

Context (Environment)

Device (Host) Operating System

Ubuntu 18.04

Architecture

amd64

Container Operating System

Linux containers - traefik:v1.7-alpine

Runtime Versions

edge-kubernetes-0.1.6

iotedged

iotedged:0.1.0-alpha

Edge Agent

azureiotedge-agent:0.1.0-alpha

Edge Hub

azureiotedge-hub:1.0

Docker

18.09.2

[darobs]

A potential fix has been checked into master, but we have not back ported this to the preview.

[lt72]

Public preview refresh will be out next week, please re-open as needed.