Service Fabric Container API not loading on endpoint - containers

Question

Create a new web application in VS2017
Right-click web application->Add->Container Orchestration support-> Service Fabric
Run (F5) locally (success), loads on http://machinename:<port in manifest>
Publish to Azure SF cluster + container registry
This URL should load http://<azurecluster>:<port in manifest>
But it is not loading.
The only thing that loads in the cluster is the Service Fabric Explorer, which shows the application running without error.
Am I doing anything wrong?
I think this has something to do with an incorrect port.
When adding a container ourselves through the template (as in the pic below), these are the options:
Host Port and container Port. Are these mapped correctly in
Container Orchestration support (step #2 above)?
In Host port help icon, it says the port might need to be opened on
load balancer. Do I need to do such things in my steps above?
Moreover, only the container port is provided in
config (applicationManifest.xml) in Step #2. So what about the host port?
How is the container port mapped to the application port?
Why didn't we have to do it locally (if this is the problem)?

Answer 1

The service specifies the container port in the manifest:
<Resources>
<Endpoints>
<Endpoint Name="Guest1TypeEndpoint" UriScheme="http" Port="8081" Protocol="http"/>
</Endpoints>
</Resources>
The application specifies the host port in the manifest:
<Policies>
<ContainerHostPolicies CodePackageRef="Code">
<PortBinding ContainerPort="80" EndpointRef="Guest1TypeEndpoint"/>
</ContainerHostPolicies>
</Policies>
In this example, container port 8081 is mapped to host port 80.
More info here.
You also need to configure an Azure Load Balancer rule and probe, to forward traffic (on port 80) into the cluster.
After that, you should see it work properly.