cpumanager: drop old custom file backend

The cpumanager file-based state backend was obsoleted since few
releases, aving the cpumanager moved to the checkpointmanager common
infrastructure.
The old test checking compatibility to/from the old format is
also no longer needed, because the checkpoint format is stable
(see
https://github.com/kubernetes/kubernetes/tree/master/pkg/kubelet/checkpointmanager).

Signed-off-by: Francesco Romani <fromani@redhat.com>

pkg/kubelet/cm/cpumanager/state/BUILD

@@ -6,7 +6,6 @@ go_library(
         "checkpoint.go",
         "state.go",
         "state_checkpoint.go",
-        "state_file.go",
         "state_mem.go",
     ],
     importpath = "k8s.io/kubernetes/pkg/kubelet/cm/cpumanager/state",
@@ -24,18 +23,13 @@ go_library(
 
 go_test(
     name = "go_default_test",
-    srcs = [
-        "state_checkpoint_test.go",
-        "state_compatibility_test.go",
-        "state_file_test.go",
-    ],
+    srcs = ["state_checkpoint_test.go"],
     embed = [":go_default_library"],
     deps = [
         "//pkg/kubelet/checkpointmanager:go_default_library",
         "//pkg/kubelet/cm/containermap:go_default_library",
         "//pkg/kubelet/cm/cpumanager/state/testing:go_default_library",
         "//pkg/kubelet/cm/cpuset:go_default_library",
-        "//vendor/github.com/stretchr/testify/require:go_default_library",
     ],
 )
 

pkg/kubelet/cm/cpumanager/state/state_compatibility_test.go

@@ -1,88 +0,0 @@
-/*
-Copyright 2018 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 state
-
-import (
-	"os"
-	"path"
-	"testing"
-
-	"github.com/stretchr/testify/require"
-	"k8s.io/kubernetes/pkg/kubelet/checkpointmanager"
-	"k8s.io/kubernetes/pkg/kubelet/cm/cpuset"
-)
-
-const compatibilityTestingCheckpoint = "cpumanager_state_compatibility_test"
-
-var state = &stateMemory{
-	assignments: ContainerCPUAssignments{
-		"pod": map[string]cpuset.CPUSet{
-			"container1": cpuset.NewCPUSet(4, 5, 6),
-			"container2": cpuset.NewCPUSet(1, 2, 3),
-		},
-	},
-	defaultCPUSet: cpuset.NewCPUSet(1, 2, 3),
-}
-
-func TestFileToCheckpointCompatibility(t *testing.T) {
-	statePath := path.Join(testingDir, compatibilityTestingCheckpoint)
-
-	// ensure there is no previous state saved at testing path
-	os.Remove(statePath)
-	// ensure testing state is removed after testing
-	defer os.Remove(statePath)
-
-	fileState, err := NewFileState(statePath, "none", nil)
-	if err != nil {
-		t.Fatalf("could not create new file state: %v", err)
-	}
-
-	fileState.SetDefaultCPUSet(state.defaultCPUSet)
-	fileState.SetCPUAssignments(state.assignments)
-
-	restoredState, err := NewCheckpointState(testingDir, compatibilityTestingCheckpoint, "none", nil)
-	if err != nil {
-		t.Fatalf("could not restore file state: %v", err)
-	}
-
-	AssertStateEqual(t, restoredState, state)
-}
-
-func TestCheckpointToFileCompatibility(t *testing.T) {
-	cpm, err := checkpointmanager.NewCheckpointManager(testingDir)
-	if err != nil {
-		t.Fatalf("could not create testing checkpoint manager: %v", err)
-	}
-
-	// ensure there is no previous checkpoint
-	cpm.RemoveCheckpoint(compatibilityTestingCheckpoint)
-	// ensure testing checkpoint is removed after testing
-	defer cpm.RemoveCheckpoint(compatibilityTestingCheckpoint)
-
-	checkpointState, err := NewCheckpointState(testingDir, compatibilityTestingCheckpoint, "none", nil)
-	require.NoError(t, err)
-
-	checkpointState.SetDefaultCPUSet(state.defaultCPUSet)
-	checkpointState.SetCPUAssignments(state.assignments)
-
-	restoredState, err := NewFileState(path.Join(testingDir, compatibilityTestingCheckpoint), "none", nil)
-	if err != nil {
-		t.Fatalf("could not create new file state: %v", err)
-	}
-
-	AssertStateEqual(t, restoredState, state)
-}

pkg/kubelet/cm/cpumanager/state/state_file.go

@@ -1,278 +0,0 @@
-/*
-Copyright 2017 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 state
-
-import (
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"sync"
-
-	"k8s.io/klog"
-	"k8s.io/kubernetes/pkg/kubelet/cm/containermap"
-	"k8s.io/kubernetes/pkg/kubelet/cm/cpuset"
-)
-
-type stateFileDataV1 struct {
-	PolicyName    string            `json:"policyName"`
-	DefaultCPUSet string            `json:"defaultCpuSet"`
-	Entries       map[string]string `json:"entries,omitempty"`
-}
-
-type stateFileDataV2 struct {
-	PolicyName    string                       `json:"policyName"`
-	DefaultCPUSet string                       `json:"defaultCpuSet"`
-	Entries       map[string]map[string]string `json:"entries,omitempty"`
-}
-
-var _ State = &stateFile{}
-
-type stateFile struct {
-	sync.RWMutex
-	stateFilePath     string
-	policyName        string
-	cache             State
-	initialContainers containermap.ContainerMap
-}
-
-// NewFileState creates new State for keeping track of cpu/pod assignment with file backend
-func NewFileState(filePath string, policyName string, initialContainers containermap.ContainerMap) (State, error) {
-	stateFile := &stateFile{
-		stateFilePath:     filePath,
-		cache:             NewMemoryState(),
-		policyName:        policyName,
-		initialContainers: initialContainers,
-	}
-
-	if err := stateFile.tryRestoreState(); err != nil {
-		// could not restore state, init new state file
-		klog.Errorf("[cpumanager] state file: unable to restore state from disk (%v)"+
-			" We cannot guarantee sane CPU affinity for existing containers."+
-			" Please drain this node and delete the CPU manager state file \"%s\" before restarting Kubelet.",
-			err, stateFile.stateFilePath)
-		return nil, err
-	}
-
-	return stateFile, nil
-}
-
-// migrateV1StateToV2State() converts state from the v1 format to the v2 format
-func (sf *stateFile) migrateV1StateToV2State(src *stateFileDataV1, dst *stateFileDataV2) error {
-	if src.PolicyName != "" {
-		dst.PolicyName = src.PolicyName
-	}
-	if src.DefaultCPUSet != "" {
-		dst.DefaultCPUSet = src.DefaultCPUSet
-	}
-	for containerID, cset := range src.Entries {
-		podUID, containerName, err := sf.initialContainers.GetContainerRef(containerID)
-		if err != nil {
-			return fmt.Errorf("containerID '%v' not found in initial containers list", containerID)
-		}
-		if dst.Entries == nil {
-			dst.Entries = make(map[string]map[string]string)
-		}
-		if _, exists := dst.Entries[podUID]; !exists {
-			dst.Entries[podUID] = make(map[string]string)
-		}
-		dst.Entries[podUID][containerName] = cset
-	}
-	return nil
-}
-
-// tryRestoreState tries to read state file, upon any error,
-// err message is logged and state is left clean. un-initialized
-func (sf *stateFile) tryRestoreState() error {
-	sf.Lock()
-	defer sf.Unlock()
-	var err error
-	var content []byte
-
-	content, err = ioutil.ReadFile(sf.stateFilePath)
-
-	// If the state file does not exist or has zero length, write a new file.
-	if os.IsNotExist(err) || len(content) == 0 {
-		err := sf.storeState()
-		if err != nil {
-			return err
-		}
-		klog.Infof("[cpumanager] state file: created new state file \"%s\"", sf.stateFilePath)
-		return nil
-	}
-
-	// Fail on any other file read error.
-	if err != nil {
-		return err
-	}
-
-	// File exists; try to read it.
-	var readStateV1 stateFileDataV1
-	var readStateV2 stateFileDataV2
-
-	if err = json.Unmarshal(content, &readStateV1); err != nil {
-		readStateV1 = stateFileDataV1{} // reset it back to 0
-		if err = json.Unmarshal(content, &readStateV2); err != nil {
-			klog.Errorf("[cpumanager] state file: could not unmarshal, corrupted state file - \"%s\"", sf.stateFilePath)
-			return err
-		}
-	}
-
-	if err = sf.migrateV1StateToV2State(&readStateV1, &readStateV2); err != nil {
-		klog.Errorf("[cpumanager] state file: could not migrate v1 state to v2 state  - \"%s\"", sf.stateFilePath)
-		return err
-	}
-
-	if sf.policyName != readStateV2.PolicyName {
-		return fmt.Errorf("policy configured \"%s\" != policy from state file \"%s\"", sf.policyName, readStateV2.PolicyName)
-	}
-
-	var tmpDefaultCPUSet cpuset.CPUSet
-	if tmpDefaultCPUSet, err = cpuset.Parse(readStateV2.DefaultCPUSet); err != nil {
-		klog.Errorf("[cpumanager] state file: could not parse state file - [defaultCpuSet:\"%s\"]", readStateV2.DefaultCPUSet)
-		return err
-	}
-
-	var tmpContainerCPUSet cpuset.CPUSet
-	tmpAssignments := ContainerCPUAssignments{}
-	for pod := range readStateV2.Entries {
-		tmpAssignments[pod] = make(map[string]cpuset.CPUSet)
-		for container, cpuString := range readStateV2.Entries[pod] {
-			if tmpContainerCPUSet, err = cpuset.Parse(cpuString); err != nil {
-				klog.Errorf("[cpumanager] state file: could not parse state file - pod: %s, container: %s, cpuset: \"%s\"", pod, container, cpuString)
-				return err
-			}
-			tmpAssignments[pod][container] = tmpContainerCPUSet
-		}
-	}
-
-	sf.cache.SetDefaultCPUSet(tmpDefaultCPUSet)
-	sf.cache.SetCPUAssignments(tmpAssignments)
-
-	klog.V(2).Infof("[cpumanager] state file: restored state from state file \"%s\"", sf.stateFilePath)
-	klog.V(2).Infof("[cpumanager] state file: defaultCPUSet: %s", tmpDefaultCPUSet.String())
-
-	return nil
-}
-
-// saves state to a file, caller is responsible for locking
-func (sf *stateFile) storeState() error {
-	var content []byte
-	var err error
-
-	data := stateFileDataV2{
-		PolicyName:    sf.policyName,
-		DefaultCPUSet: sf.cache.GetDefaultCPUSet().String(),
-		Entries:       map[string]map[string]string{},
-	}
-
-	assignments := sf.cache.GetCPUAssignments()
-	for pod := range assignments {
-		data.Entries[pod] = map[string]string{}
-		for container, cset := range assignments[pod] {
-			data.Entries[pod][container] = cset.String()
-		}
-	}
-
-	if content, err = json.Marshal(data); err != nil {
-		return fmt.Errorf("[cpumanager] state file: could not serialize state to json")
-	}
-
-	if err = ioutil.WriteFile(sf.stateFilePath, content, 0644); err != nil {
-		return fmt.Errorf("[cpumanager] state file not written")
-	}
-
-	return nil
-}
-
-func (sf *stateFile) GetCPUSet(podUID string, containerName string) (cpuset.CPUSet, bool) {
-	sf.RLock()
-	defer sf.RUnlock()
-
-	res, ok := sf.cache.GetCPUSet(podUID, containerName)
-	return res, ok
-}
-
-func (sf *stateFile) GetDefaultCPUSet() cpuset.CPUSet {
-	sf.RLock()
-	defer sf.RUnlock()
-
-	return sf.cache.GetDefaultCPUSet()
-}
-
-func (sf *stateFile) GetCPUSetOrDefault(podUID string, containerName string) cpuset.CPUSet {
-	sf.RLock()
-	defer sf.RUnlock()
-
-	return sf.cache.GetCPUSetOrDefault(podUID, containerName)
-}
-
-func (sf *stateFile) GetCPUAssignments() ContainerCPUAssignments {
-	sf.RLock()
-	defer sf.RUnlock()
-	return sf.cache.GetCPUAssignments()
-}
-
-func (sf *stateFile) SetCPUSet(podUID string, containerName string, cset cpuset.CPUSet) {
-	sf.Lock()
-	defer sf.Unlock()
-	sf.cache.SetCPUSet(podUID, containerName, cset)
-	err := sf.storeState()
-	if err != nil {
-		klog.Warningf("store state to checkpoint error: %v", err)
-	}
-}
-
-func (sf *stateFile) SetDefaultCPUSet(cset cpuset.CPUSet) {
-	sf.Lock()
-	defer sf.Unlock()
-	sf.cache.SetDefaultCPUSet(cset)
-	err := sf.storeState()
-	if err != nil {
-		klog.Warningf("store state to checkpoint error: %v", err)
-	}
-}
-
-func (sf *stateFile) SetCPUAssignments(a ContainerCPUAssignments) {
-	sf.Lock()
-	defer sf.Unlock()
-	sf.cache.SetCPUAssignments(a)
-	err := sf.storeState()
-	if err != nil {
-		klog.Warningf("store state to checkpoint error: %v", err)
-	}
-}
-
-func (sf *stateFile) Delete(podUID string, containerName string) {
-	sf.Lock()
-	defer sf.Unlock()
-	sf.cache.Delete(podUID, containerName)
-	err := sf.storeState()
-	if err != nil {
-		klog.Warningf("store state to checkpoint error: %v", err)
-	}
-}
-
-func (sf *stateFile) ClearState() {
-	sf.Lock()
-	defer sf.Unlock()
-	sf.cache.ClearState()
-	err := sf.storeState()
-	if err != nil {
-		klog.Warningf("store state to checkpoint error: %v", err)
-	}
-}

pkg/kubelet/cm/cpumanager/state/state_file_test.go

@@ -1,534 +0,0 @@
-/*
-Copyright 2017 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 state
-
-import (
-	"bytes"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"os"
-	"path"
-	"reflect"
-	"strings"
-	"testing"
-
-	"k8s.io/kubernetes/pkg/kubelet/cm/containermap"
-	"k8s.io/kubernetes/pkg/kubelet/cm/cpuset"
-)
-
-func writeToStateFile(statefile string, content string) {
-	ioutil.WriteFile(statefile, []byte(content), 0644)
-}
-
-// AssertStateEqual marks provided test as failed if provided states differ
-func AssertStateEqual(t *testing.T, sf State, sm State) {
-	cpusetSf := sf.GetDefaultCPUSet()
-	cpusetSm := sm.GetDefaultCPUSet()
-	if !cpusetSf.Equals(cpusetSm) {
-		t.Errorf("State CPUSet mismatch. Have %v, want %v", cpusetSf, cpusetSm)
-	}
-
-	cpuassignmentSf := sf.GetCPUAssignments()
-	cpuassignmentSm := sm.GetCPUAssignments()
-	if !reflect.DeepEqual(cpuassignmentSf, cpuassignmentSm) {
-		t.Errorf("State CPU assignments mismatch. Have %s, want %s", cpuassignmentSf, cpuassignmentSm)
-	}
-}
-
-func stderrCapture(t *testing.T, f func() State) (bytes.Buffer, State) {
-	stderr := os.Stderr
-
-	readBuffer, writeBuffer, err := os.Pipe()
-	if err != nil {
-		t.Errorf("cannot create pipe: %v", err.Error())
-	}
-
-	os.Stderr = writeBuffer
-	var outputBuffer bytes.Buffer
-
-	state := f()
-	writeBuffer.Close()
-	io.Copy(&outputBuffer, readBuffer)
-	os.Stderr = stderr
-
-	return outputBuffer, state
-}
-
-func TestFileStateTryRestore(t *testing.T) {
-	testCases := []struct {
-		description       string
-		stateFileContent  string
-		policyName        string
-		initialContainers containermap.ContainerMap
-		expErr            string
-		expectedState     *stateMemory
-	}{
-		{
-			"Invalid JSON - one byte file",
-			"\n",
-			"none",
-			containermap.ContainerMap{},
-			"[cpumanager] state file: unable to restore state from disk (unexpected end of JSON input)",
-			&stateMemory{},
-		},
-		{
-			"Invalid JSON - invalid content",
-			"{",
-			"none",
-			containermap.ContainerMap{},
-			"[cpumanager] state file: unable to restore state from disk (unexpected end of JSON input)",
-			&stateMemory{},
-		},
-		{
-			"Try restore defaultCPUSet only",
-			`{"policyName": "none", "defaultCpuSet": "4-6"}`,
-			"none",
-			containermap.ContainerMap{},
-			"",
-			&stateMemory{
-				assignments:   ContainerCPUAssignments{},
-				defaultCPUSet: cpuset.NewCPUSet(4, 5, 6),
-			},
-		},
-		{
-			"Try restore defaultCPUSet only - invalid name",
-			`{"policyName": "none", "defaultCpuSet" "4-6"}`,
-			"none",
-			containermap.ContainerMap{},
-			`[cpumanager] state file: unable to restore state from disk (invalid character '"' after object key)`,
-			&stateMemory{},
-		},
-		{
-			"Try restore assignments only",
-			`{
-				"policyName": "none",
-				"entries": {
-					"pod": {
-						"container1": "4-6",
-						"container2": "1-3"
-					}
-				}
-			}`,
-			"none",
-			containermap.ContainerMap{},
-			"",
-			&stateMemory{
-				assignments: ContainerCPUAssignments{
-					"pod": map[string]cpuset.CPUSet{
-						"container1": cpuset.NewCPUSet(4, 5, 6),
-						"container2": cpuset.NewCPUSet(1, 2, 3),
-					},
-				},
-				defaultCPUSet: cpuset.NewCPUSet(),
-			},
-		},
-		{
-			"Try restore invalid policy name",
-			`{
-				"policyName": "A",
-				"defaultCpuSet": "0-7",
-				"entries": {}
-			}`,
-			"B",
-			containermap.ContainerMap{},
-			`[cpumanager] state file: unable to restore state from disk (policy configured "B" != policy from state file "A")`,
-			&stateMemory{},
-		},
-		{
-			"Try restore invalid assignments",
-			`{"entries": }`,
-			"none",
-			containermap.ContainerMap{},
-			"[cpumanager] state file: unable to restore state from disk (invalid character '}' looking for beginning of value)",
-			&stateMemory{},
-		},
-		{
-			"Try restore valid file",
-			`{
-				"policyName": "none",
-				"defaultCpuSet": "23-24",
-				"entries": {
-					"pod": {
-						"container1": "4-6",
-						"container2": "1-3"
-					}
-				}
-			}`,
-			"none",
-			containermap.ContainerMap{},
-			"",
-			&stateMemory{
-				assignments: ContainerCPUAssignments{
-					"pod": map[string]cpuset.CPUSet{
-						"container1": cpuset.NewCPUSet(4, 5, 6),
-						"container2": cpuset.NewCPUSet(1, 2, 3),
-					},
-				},
-				defaultCPUSet: cpuset.NewCPUSet(23, 24),
-			},
-		},
-		{
-			"Try restore un-parsable defaultCPUSet ",
-			`{
-				"policyName": "none",
-				"defaultCpuSet": "2-sd"
-			}`,
-			"none",
-			containermap.ContainerMap{},
-			`[cpumanager] state file: unable to restore state from disk (strconv.Atoi: parsing "sd": invalid syntax)`,
-			&stateMemory{},
-		},
-		{
-			"Try restore un-parsable assignments",
-			`{
-				"policyName": "none",
-				"defaultCpuSet": "23-24",
-				"entries": {
-					"pod": {
-						"container1": "p-6",
-						"container2": "1-3"
-					}
-				}
-			}`,
-			"none",
-			containermap.ContainerMap{},
-			`[cpumanager] state file: unable to restore state from disk (strconv.Atoi: parsing "p": invalid syntax)`,
-			&stateMemory{},
-		},
-		{
-			"tryRestoreState creates empty state file",
-			"",
-			"none",
-			containermap.ContainerMap{},
-			"",
-			&stateMemory{
-				assignments:   ContainerCPUAssignments{},
-				defaultCPUSet: cpuset.NewCPUSet(),
-			},
-		},
-		{
-			"Try restore with migration",
-			`{
-				"policyName": "none",
-				"defaultCpuSet": "23-24",
-				"entries": {
-					"containerID1": "4-6",
-					"containerID2": "1-3"
-				}
-			}`,
-			"none",
-			func() containermap.ContainerMap {
-				cm := containermap.NewContainerMap()
-				cm.Add("pod", "container1", "containerID1")
-				cm.Add("pod", "container2", "containerID2")
-				return cm
-			}(),
-			"",
-			&stateMemory{
-				assignments: ContainerCPUAssignments{
-					"pod": map[string]cpuset.CPUSet{
-						"container1": cpuset.NewCPUSet(4, 5, 6),
-						"container2": cpuset.NewCPUSet(1, 2, 3),
-					},
-				},
-				defaultCPUSet: cpuset.NewCPUSet(23, 24),
-			},
-		},
-	}
-
-	for idx, tc := range testCases {
-		t.Run(tc.description, func(t *testing.T) {
-			sfilePath, err := ioutil.TempFile("/tmp", fmt.Sprintf("cpumanager_state_file_test_%d", idx))
-			if err != nil {
-				t.Errorf("cannot create temporary file: %q", err.Error())
-			}
-			// Don't create state file, let tryRestoreState figure out that is should create
-			if tc.stateFileContent != "" {
-				writeToStateFile(sfilePath.Name(), tc.stateFileContent)
-			}
-
-			// Always remove file - regardless of who created
-			defer os.Remove(sfilePath.Name())
-
-			logData, fileState := stderrCapture(t, func() State {
-				newFileState, _ := NewFileState(sfilePath.Name(), tc.policyName, tc.initialContainers)
-				return newFileState
-			})
-
-			if tc.expErr != "" {
-				if logData.String() != "" {
-					if !strings.Contains(logData.String(), tc.expErr) {
-						t.Errorf("tryRestoreState() error = %v, wantErr %v", logData.String(), tc.expErr)
-						return
-					}
-				} else {
-					t.Errorf("tryRestoreState() error = nil, wantErr %v", tc.expErr)
-					return
-				}
-			}
-
-			if fileState == nil {
-				return
-			}
-
-			AssertStateEqual(t, fileState, tc.expectedState)
-		})
-	}
-}
-
-func TestFileStateTryRestoreError(t *testing.T) {
-
-	testCases := []struct {
-		description string
-		expErr      error
-	}{
-		{
-			" create file error",
-			fmt.Errorf("[cpumanager] state file not written"),
-		},
-	}
-
-	for _, testCase := range testCases {
-		t.Run(testCase.description, func(t *testing.T) {
-			sfilePath := path.Join("/invalid_path/to_some_dir", "cpumanager_state_file_test")
-			_, err := NewFileState(sfilePath, "static", nil)
-			if !reflect.DeepEqual(err, testCase.expErr) {
-				t.Errorf("unexpected error, expected: %s, got: %s", testCase.expErr, err)
-			}
-		})
-	}
-}
-
-func TestUpdateStateFile(t *testing.T) {
-	testCases := []struct {
-		description   string
-		expErr        string
-		expectedState *stateMemory
-	}{
-		{
-			"Save empty state",
-			"",
-			&stateMemory{
-				assignments:   ContainerCPUAssignments{},
-				defaultCPUSet: cpuset.NewCPUSet(),
-			},
-		},
-		{
-			"Save defaultCPUSet only",
-			"",
-			&stateMemory{
-				assignments:   ContainerCPUAssignments{},
-				defaultCPUSet: cpuset.NewCPUSet(1, 6),
-			},
-		},
-		{
-			"Save assignments only",
-			"",
-			&stateMemory{
-				assignments: ContainerCPUAssignments{
-					"pod": map[string]cpuset.CPUSet{
-						"container1": cpuset.NewCPUSet(4, 5, 6),
-						"container2": cpuset.NewCPUSet(1, 2, 3),
-					},
-				},
-				defaultCPUSet: cpuset.NewCPUSet(),
-			},
-		},
-	}
-
-	for idx, tc := range testCases {
-		t.Run(tc.description, func(t *testing.T) {
-
-			sfilePath, err := ioutil.TempFile("/tmp", fmt.Sprintf("cpumanager_state_file_test_%d", idx))
-			defer os.Remove(sfilePath.Name())
-			if err != nil {
-				t.Errorf("cannot create temporary file: %q", err.Error())
-			}
-			fileState := stateFile{
-				stateFilePath: sfilePath.Name(),
-				policyName:    "static",
-				cache:         NewMemoryState(),
-			}
-
-			fileState.SetDefaultCPUSet(tc.expectedState.defaultCPUSet)
-			fileState.SetCPUAssignments(tc.expectedState.assignments)
-
-			logData, _ := stderrCapture(t, func() State {
-				fileState.storeState()
-				return &stateFile{}
-			})
-
-			errMsg := logData.String()
-
-			if tc.expErr != "" {
-				if errMsg != "" {
-					if errMsg != tc.expErr {
-						t.Errorf("UpdateStateFile() error = %v, wantErr %v", errMsg, tc.expErr)
-						return
-					}
-				} else {
-					t.Errorf("UpdateStateFile() error = nil, wantErr %v", tc.expErr)
-					return
-				}
-			} else {
-				if errMsg != "" {
-					t.Errorf("UpdateStateFile() error = %v, wantErr nil", errMsg)
-					return
-				}
-			}
-			newFileState, err := NewFileState(sfilePath.Name(), "static", nil)
-			if err != nil {
-				t.Errorf("NewFileState() error: %v", err)
-				return
-			}
-			AssertStateEqual(t, newFileState, tc.expectedState)
-		})
-	}
-}
-
-func TestHelpersStateFile(t *testing.T) {
-	testCases := []struct {
-		description   string
-		defaultCPUset cpuset.CPUSet
-		assignments   map[string]map[string]cpuset.CPUSet
-	}{
-		{
-			description:   "one container",
-			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
-			assignments: map[string]map[string]cpuset.CPUSet{
-				"pod": {
-					"c1": cpuset.NewCPUSet(0, 1),
-				},
-			},
-		},
-		{
-			description:   "two containers",
-			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
-			assignments: map[string]map[string]cpuset.CPUSet{
-				"pod": {
-					"c1": cpuset.NewCPUSet(0, 1),
-					"c2": cpuset.NewCPUSet(2, 3, 4, 5),
-				},
-			},
-		},
-		{
-			description:   "container with more cpus than is possible",
-			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
-			assignments: map[string]map[string]cpuset.CPUSet{
-				"pod": {
-					"c1": cpuset.NewCPUSet(0, 10),
-				},
-			},
-		},
-		{
-			description:   "container without assigned cpus",
-			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
-			assignments: map[string]map[string]cpuset.CPUSet{
-				"pod": {
-					"c1": cpuset.NewCPUSet(),
-				},
-			},
-		},
-	}
-
-	for _, tc := range testCases {
-		t.Run(tc.description, func(t *testing.T) {
-			sfFile, err := ioutil.TempFile("/tmp", "testHelpersStateFile")
-			defer os.Remove(sfFile.Name())
-			if err != nil {
-				t.Errorf("cannot create temporary test file: %q", err.Error())
-			}
-
-			state, err := NewFileState(sfFile.Name(), "static", nil)
-			if err != nil {
-				t.Errorf("new file state error: %v", err)
-				return
-			}
-
-			state.SetDefaultCPUSet(tc.defaultCPUset)
-
-			for podUID := range tc.assignments {
-				for containerName, containerCPUs := range tc.assignments[podUID] {
-					state.SetCPUSet(podUID, containerName, containerCPUs)
-					if cpus, _ := state.GetCPUSet(podUID, containerName); !cpus.Equals(containerCPUs) {
-						t.Errorf("state is inconsistent. Wants = %q Have = %q", containerCPUs, cpus)
-					}
-					state.Delete(podUID, containerName)
-					if cpus := state.GetCPUSetOrDefault(podUID, containerName); !cpus.Equals(tc.defaultCPUset) {
-						t.Error("deleted container still existing in state")
-					}
-
-				}
-			}
-
-		})
-	}
-}
-
-func TestClearStateStateFile(t *testing.T) {
-	testCases := []struct {
-		description   string
-		defaultCPUset cpuset.CPUSet
-		assignments   map[string]map[string]cpuset.CPUSet
-	}{
-		{
-			description:   "valid file",
-			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
-			assignments: map[string]map[string]cpuset.CPUSet{
-				"pod": {
-					"c1": cpuset.NewCPUSet(0, 1),
-					"c2": cpuset.NewCPUSet(2, 3),
-					"c3": cpuset.NewCPUSet(4, 5),
-				},
-			},
-		},
-	}
-	for _, testCase := range testCases {
-		t.Run(testCase.description, func(t *testing.T) {
-			sfFile, err := ioutil.TempFile("/tmp", "testHelpersStateFile")
-			defer os.Remove(sfFile.Name())
-			if err != nil {
-				t.Errorf("cannot create temporary test file: %q", err.Error())
-			}
-
-			state, err := NewFileState(sfFile.Name(), "static", nil)
-			if err != nil {
-				t.Errorf("new file state error: %v", err)
-				return
-			}
-			state.SetDefaultCPUSet(testCase.defaultCPUset)
-			for podUID := range testCase.assignments {
-				for containerName, containerCPUs := range testCase.assignments[podUID] {
-					state.SetCPUSet(podUID, containerName, containerCPUs)
-				}
-			}
-
-			state.ClearState()
-			if !cpuset.NewCPUSet().Equals(state.GetDefaultCPUSet()) {
-				t.Error("cleared state shouldn't has got information about available cpuset")
-			}
-			for podUID := range testCase.assignments {
-				for containerName := range testCase.assignments[podUID] {
-					if !cpuset.NewCPUSet().Equals(state.GetCPUSetOrDefault(podUID, containerName)) {
-						t.Error("cleared state shouldn't has got information about containers")
-					}
-				}
-			}
-		})
-	}
-}