Create a slice with the custom docker image

[Xusheng Ai]

Hello,

I have a question that if we could create a node with our customize docker image on Fabric. We have a image file called ndn-dpdk-builder, and we want to create a node using this image. I saw Fabric has a docker repository that allows to build and publish the images to the FABRIC Testbed Docker Hub. I was wondering if we publish our image file to the FABRIC Testbed Docker Hub, then we would have the ndn-dpdk-builder image as a option when we create nodes. If not, is there a possibility that we could achieve this?

Thanks,
Xusheng

[Paul Ruth]

We are working on a way to streamline deployment of docker images into VMs on FABRIC. Watch for some coming updates to the FABLib library.

The way to do this is to boot a VM then pull the docker image from somewhere like DockerHub.  You can do this yourself right now.

In fablib you can do something like:


node1.execute("sudo apt-get -y install docker.io")
node1.execute("docker pull <docker hub image name>")
node1.ececute("docker run .... ")


Note that on IPv6 site you will need specify the IPv6 docker hub registry like this:

docker pull registry.ipv6.docker.com/<image name>

More info on DockerHub and IPv6 is here: https://www.docker.com/blog/beta-ipv6-support-on-docker-hub-registry/

[Xusheng Ai]

Hello Paul,

Thanks for the information. I’m able to run command docker pull registry.ipv6.docker.com/<image name> on the node I created. So one possible way is that I could run docker run <my image> to get the VM on that node?

In addition, I was wondering if we could set node_name = 'Node1' image = '<my image>' when we configure Experiment Parameters of a slice.

Thanks,
Xusheng

• This reply was modified 2 years, 8 months ago by Xusheng Ai.

[Paul Ruth]

You won’t be able to say image=<my_docker_image>. The lowest level abstraction needs to be a VM.

We are working on a feature for fablib where you will be able to say something like (this is not ready yet):

node1 = slice.add_node(name='Node1', image='default_ubuntu_20', docker='<docker_hub_image_name>')

This would create a VM with the default unbuntu 20 image then automatically run a docker container in the VM using that docker image.  In general, the philosophy is that VMs are good for multiplexing hardware and containers are good for packaging software.

[Xusheng Ai]

Thanks so much for the clarification.

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