Make the ports 8092, 8093, 8094 and 8095 configurable to be able to use docker's random ports

Java SDK
3

Thank you for answering.

I understand but i don’t think that docker allows to have a random internal port.

We would have such a workflow:

version: '3.0'
services:
  rapid_test_cb:
    build:
      context: ""
      dockerfile: cb.docker
    ports:
      - "8091"  <= this is a fixed internal port with a random external port, otherwise it would be 8091:8091
      - "8092"
      - "8093"
      - "11210"

1: Start the image
2: Inside the image parse the /var/run/docker.sock file to get the exposed port (lots of work and no easy way to do that)
3: Inject those ports into the couchbase server’s conf and start it
4: The client tries to connect to the the exposed port and… failure

Why ?

Well, we would have this:

Exposed random port: 3485 (just an example)
Internal fix port: 8091
Internal couchbase port: 3485 (same as the exposed random port)

Two problems:

  1. 8091 <> 3485 so it would not work.
  2. Getting the random exposed ports from within the container is possible but not trivial.

As far as I know, it is not possible to have a random port for both external and internal ports in a docker-compose file. And even if it was the case, the image’s changes are not trivial compared to just having fixed ports at the client level for your integration tests.

I am opened to better ideas or any compromise.