124 lines
2.9 KiB
Go
124 lines
2.9 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package deviceplugin
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import (
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"log"
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"net"
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"os"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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pluginapi "k8s.io/kubernetes/pkg/kubelet/apis/deviceplugin/v1alpha1"
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)
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// MockDevicePlugin is a mock device plugin
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type MockDevicePlugin struct {
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devs []*pluginapi.Device
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socket string
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stop chan interface{}
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update chan []*pluginapi.Device
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server *grpc.Server
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}
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// NewMockDevicePlugin returns an initialized MockDevicePlugin
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func NewMockDevicePlugin(devs []*pluginapi.Device, socket string) *MockDevicePlugin {
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return &MockDevicePlugin{
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devs: devs,
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socket: socket,
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stop: make(chan interface{}),
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update: make(chan []*pluginapi.Device),
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}
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}
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// Start starts the gRPC server of the device plugin
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func (m *MockDevicePlugin) Start() error {
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err := m.cleanup()
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if err != nil {
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return err
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}
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sock, err := net.Listen("unix", m.socket)
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if err != nil {
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return err
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}
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m.server = grpc.NewServer([]grpc.ServerOption{}...)
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pluginapi.RegisterDevicePluginServer(m.server, m)
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go m.server.Serve(sock)
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log.Println("Starting to serve on", m.socket)
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return nil
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}
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// Stop stops the gRPC server
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func (m *MockDevicePlugin) Stop() error {
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m.server.Stop()
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return m.cleanup()
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}
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// ListAndWatch lists devices and update that list according to the Update call
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func (m *MockDevicePlugin) ListAndWatch(e *pluginapi.Empty, s pluginapi.DevicePlugin_ListAndWatchServer) error {
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log.Println("ListAndWatch")
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var devs []*pluginapi.Device
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for _, d := range m.devs {
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devs = append(devs, &pluginapi.Device{
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ID: d.ID,
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Health: pluginapi.Healthy,
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})
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}
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s.Send(&pluginapi.ListAndWatchResponse{Devices: devs})
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for {
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select {
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case <-m.stop:
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return nil
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case updated := <-m.update:
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s.Send(&pluginapi.ListAndWatchResponse{Devices: updated})
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}
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}
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}
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// Update allows the device plugin to send new devices through ListAndWatch
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func (m *MockDevicePlugin) Update(devs []*pluginapi.Device) {
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m.update <- devs
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}
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// Allocate does a mock allocation
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func (m *MockDevicePlugin) Allocate(ctx context.Context, r *pluginapi.AllocateRequest) (*pluginapi.AllocateResponse, error) {
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log.Printf("Allocate, %+v", r)
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var response pluginapi.AllocateResponse
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return &response, nil
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}
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func (m *MockDevicePlugin) cleanup() error {
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if err := os.Remove(m.socket); err != nil && !os.IsNotExist(err) {
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return err
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}
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return nil
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}
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