CODEWITHSUNDEEP
docker
Derek
Derek

Reputation: 1125

Docker: give a random port mapping only to certain ports

I'm using Docker 1.9.1's remote API to create a container.

One thing I'm trying to accomplish is that among all the exposed ports of an image, I only want to expose a few of them (or in other words give them host port mapping), at the same time I don't want to manage the host ports to use but want Docker to pick up random and available ones.

For example, an image has port 80, 443, 22 exposed, what I want is something like this in a Docker run flavor (I know this is not possible through cmd line though)

docker run -p {a random available port}:80 image

Can I achieve something like this through remote API? Right now I can only set PublishAllPorts = true but that publish all ports and waste too many host ports.

Upvotes: 1

Views: 2403

Answers (1)

Shibashis
Shibashis

Reputation: 8401

Docker rest api for starting container allows you to define port bindings. For random mapping to host port use "PortBindings": { "80/tcp": [{ "HostPort": "" }] }

Upvotes: 3

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