How do I publish a random port?

[baautitz]

I'm attempting to dynamically assign a random port to a container upon its creation. I've been experimenting with various configurations, including setting the PortBindings property to null and trying different values for HostPort such as 0, null, an empty string, and "0". However, I haven't been successful in achieving the desired outcome. Here's the snippet of code I've been working with:

CreateContainerParameters containerParameters = new CreateContainerParameters {
    Name = name,
    Image = type,
    HostConfig = new HostConfig {
        PortBindings = new Dictionary<string, IList<PortBinding>> {
            { "25565/tcp", [] }
        }
    }
};

[hakimdotdev]

Hi, this works for me:

var portBindings = new Dictionary<string, IList<PortBinding>>();
var exposedPorts = new Dictionary<string, EmptyStruct>();
portBindings.Add($"{hostport}/tcp", new List<PortBinding> { new() { HostPort = port.ToString() } });
exposedPorts.Add($"{port}/tcp", default);