api.go

/*
Copyright 2022 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package v1beta1

import (
	api "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
)

// RegistrationHandler is an interface for handling device plugin registration
// and plugin directory cleanup.
type RegistrationHandler interface {
	CleanupPluginDirectory(string) error
}

// ClientHandler is an interface for handling device plugin connections.
type ClientHandler interface {
	PluginConnected(string, DevicePlugin) error
	PluginDisconnected(string)
	PluginListAndWatchReceiver(string, *api.ListAndWatchResponse)
}

// TODO: evaluate whether we need these error definitions.
const (
	// errFailedToDialDevicePlugin is the error raised when the device plugin could not be
	// reached on the registered socket
	errFailedToDialDevicePlugin = "failed to dial device plugin:"
	// errUnsupportedVersion is the error raised when the device plugin uses an API version not
	// supported by the Kubelet registry
	errUnsupportedVersion = "requested API version %q is not supported by kubelet. Supported version is %q"
	// errInvalidResourceName is the error raised when a device plugin is registering
	// itself with an invalid ResourceName
	errInvalidResourceName = "the ResourceName %q is invalid"
	// errBadSocket is the error raised when the registry socket path is not absolute
	errBadSocket = "bad socketPath, must be an absolute path:"
)