forked from github/multus-cni
484385456b
this changes will allow mocking checkpoint instance for unit tests Change-Id: I72fb25d15d5c9f28577a0fcbfcd385df523a5e57
114 lines
3.0 KiB
Go
114 lines
3.0 KiB
Go
// Copyright (c) 2018 Intel Corporation
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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 checkpoint
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import (
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"encoding/json"
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"io/ioutil"
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"github.com/intel/multus-cni/logging"
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"github.com/intel/multus-cni/types"
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)
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const (
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checkPointfile = "/var/lib/kubelet/device-plugins/kubelet_internal_checkpoint"
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)
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type PodDevicesEntry struct {
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PodUID string
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ContainerName string
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ResourceName string
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DeviceIDs []string
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AllocResp []byte
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}
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type checkpointData struct {
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PodDeviceEntries []PodDevicesEntry
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RegisteredDevices map[string][]string
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}
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type Data struct {
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Data checkpointData
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Checksum uint64
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}
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type Checkpoint interface {
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// GetComputeDeviceMap returns an instance of a map of ResourceInfo for a PodID
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GetComputeDeviceMap(string) (map[string]*types.ResourceInfo, error)
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}
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type checkpoint struct {
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fileName string
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podEntires []PodDevicesEntry
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}
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// GetCheckpoint returns an instance of Checkpoint
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func GetCheckpoint() (Checkpoint, error) {
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logging.Debugf("GetCheckpoint(): invoked")
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return getCheckpoint(checkPointfile)
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}
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func getCheckpoint(filePath string) (Checkpoint, error) {
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cp := &checkpoint{fileName: filePath}
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err := cp.getPodEntries()
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if err != nil {
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return nil, err
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}
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logging.Debugf("getCheckpoint(): created checkpoint instance with file: %s", filePath)
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return cp, nil
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}
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// getPodEntries gets all Pod device allocation entries from checkpoint file
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func (cp *checkpoint) getPodEntries() error {
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cpd := &Data{}
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rawBytes, err := ioutil.ReadFile(cp.fileName)
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if err != nil {
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return logging.Errorf("getPodEntries(): error reading file %s\n%v\n", checkPointfile, err)
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}
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if err = json.Unmarshal(rawBytes, cpd); err != nil {
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return logging.Errorf("getPodEntries(): error unmarshalling raw bytes %v", err)
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}
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cp.podEntires = cpd.Data.PodDeviceEntries
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logging.Debugf("getPodEntries(): podEntires %+v", cp.podEntires)
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return nil
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}
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// GetComputeDeviceMap returns an instance of a map of ResourceInfo
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func (cp *checkpoint) GetComputeDeviceMap(podID string) (map[string]*types.ResourceInfo, error) {
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resourceMap := make(map[string]*types.ResourceInfo)
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if podID == "" {
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return nil, logging.Errorf("GetComputeDeviceMap(): invalid Pod cannot be empty")
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}
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for _, pod := range cp.podEntires {
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if pod.PodUID == podID {
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entry, ok := resourceMap[pod.ResourceName]
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if ok {
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// already exists; append to it
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entry.DeviceIDs = append(entry.DeviceIDs, pod.DeviceIDs...)
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} else {
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// new entry
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resourceMap[pod.ResourceName] = &types.ResourceInfo{DeviceIDs: pod.DeviceIDs}
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}
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}
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}
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return resourceMap, nil
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}
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