K8s Dummy Device Plugin (for testing purpose only)
This is a plugin that's used for testing and exploring Kubernetes Device Plugins.
In essence, it works as a kind of echo device. One specifies the (albeit pretend) devices in a JSON file, and the plugin operates on those, and allocates the devices to containers that request them -- it does this by setting those devices into environment variables in those containers.
creates nvidia.com/gpu device for testing.
examples/daemonset.yml contains example deployment with config map
Specify number of GPUs in config map
Set label fake-device-plugin: 'true' on nodes to activate
This plugin is built by simply building the dummy.go file. Make sure your $GOPATH is set correctly and build with:
go build dummy.go
Dependencies are managed and versioned internally with dep.
In the ./examples/ directory there is an example DaemonSet that will deploy the device plugin on each node in your cluster.
kubectl create -f ./examples/daemonset.yml
Then create the sample pod, available as ./sample_pod.yaml in this repository.
$ kubectl create -f ./sample_pod.yaml
You may then see that the "devices" were created as environment variables.
$ kubectl exec -it dummy-pod -- /bin/sh -c "printenv" | grep DUMMY_DEVICES
DUMMY_DEVICES=dev_3,dev_4
Configuration of the "pretend" devices are in the ./dummyResources.json file.
More configuration to come.