getContainerByServiceName expects an instance name

[aruiz14]

#2314 brought support for selecting a container based on the service name when using docker-compose (thanks 🙌 !). However, the value it expects contains the "container number" (e.g. service_1), instead of just the service name, e.g. just service.

This does not match the behaviour of using docker-compose directly:

$ docker-compose ps agent
      Name             Command       State   Ports
--------------------------------------------------
myapp_agent_1   /bin/k3s agent   Up

$ docker-compose ps agent_1
ERROR: No such service: agent_1

According to this test, it looks like the expected behavior, or maybe was incorrectly modeled.

Maybe using getServiceInstanceName from getContainerByServiceName would provide compatibility for both cases?

[mjh-c]

I got hit by the same problem. To solve this I had to clone the private method getServiceInstanceName(String serviceName) to get the service instance name for a service name.
I have no idea how I can get the service instance name in any other way.

getServicePort() calls getServinceInstanceName in internally and therefore it works with both.