Power Device Plugin

Power Device Plugin to add protected devices into a non-privileged container.

The Power Device Plugin uses the Kubernetes Device Plugin in order to add specific devices to the given Pod.

Steps

Device Plugin

The device plugin only installs on the workers.

1. To deploy the device plugin:

# kustomize build manifests | oc apply -f -

project.project.openshift.io/power-device-plugin created
serviceaccount/power-device-plugin created
clusterrolebinding.rbac.authorization.k8s.io/power-device-plugin created
daemonset.apps/power-device-plugin created

Debug DaemonSet

To debug the running plugin, you can use:

export GRPC_GO_LOG_VERBOSITY_LEVEL=99
export GRPC_GO_LOG_SEVERITY_LEVEL=info

Thse are commented out in the DaemonSet.

Debug Kubelet

You can check the kubelet behavior using:

# journalctl -u kubelet
...
 7446 handler.go:95] "Registered client" name="power-dev-plugin/dev"
wrapper[7446]: I1219 04:32:20.722778    7446 manager.go:230] "Device plugin connected" resourceName="power-dev-plugin/dev"
wrapper[7446]: I1219 04:32:20.723559    7446 client.go:93] "State pushed for device plugin" resource="power-dev-plugin/dev" re>
wrapper[7446]: I1219 04:32:20.726284    7446 manager.go:279] "Processed device updates for resource" resourceName="power-dev-p>
wrapper[7446]: I1219 04:32:27.293908    7446 setters.go:333] "Updated capacity for device plugin" plugin="power-dev-plugin/dev>

Sample

1. To deploy the sample: kustomize build examples | oc apply -f -

Sources

1. https://github.com/intel/intel-device-plugins-for-kubernetes/blob/main/pkg/deviceplugin/manager.go#L96
2. https://github.com/kairen/simple-device-plugin/tree/master
3. https://github.com/kubernetes/kubelet/tree/master/pkg/apis/deviceplugin/v1beta1
4. https://kubernetes.io/docs/concepts/extend-kubernetes/compute-storage-net/device-plugins/#examples

Build

The build includes multiple architectures: linux/amd64, linux/ppc64le, linux/s390x. The build uses the ubi9/ubi:9.4 image.