-
Notifications
You must be signed in to change notification settings - Fork 38.6k
/
checkpoint.go
122 lines (105 loc) · 4.06 KB
/
checkpoint.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
/*
Copyright 2023 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"
"hash/fnv"
"strings"
"k8s.io/apimachinery/pkg/util/dump"
"k8s.io/kubernetes/pkg/kubelet/checkpointmanager"
"k8s.io/kubernetes/pkg/kubelet/checkpointmanager/checksum"
"k8s.io/kubernetes/pkg/kubelet/checkpointmanager/errors"
)
var _ checkpointmanager.Checkpoint = &DRAManagerCheckpoint{}
const checkpointVersion = "v1"
// DRAManagerCheckpoint struct is used to store pod dynamic resources assignments in a checkpoint
type DRAManagerCheckpoint struct {
Version string `json:"version"`
Entries ClaimInfoStateList `json:"entries,omitempty"`
Checksum checksum.Checksum `json:"checksum"`
}
// DraManagerCheckpoint struct is an old implementation of the DraManagerCheckpoint
type DRAManagerCheckpointWithoutResourceHandles struct {
Version string `json:"version"`
Entries ClaimInfoStateListWithoutResourceHandles `json:"entries,omitempty"`
Checksum checksum.Checksum `json:"checksum"`
}
// List of claim info to store in checkpoint
type ClaimInfoStateList []ClaimInfoState
// List of claim info to store in checkpoint
// TODO: remove in Beta
type ClaimInfoStateListWithoutResourceHandles []ClaimInfoStateWithoutResourceHandles
// NewDRAManagerCheckpoint returns an instance of Checkpoint
func NewDRAManagerCheckpoint() *DRAManagerCheckpoint {
return &DRAManagerCheckpoint{
Version: checkpointVersion,
Entries: ClaimInfoStateList{},
}
}
// MarshalCheckpoint returns marshalled checkpoint
func (dc *DRAManagerCheckpoint) MarshalCheckpoint() ([]byte, error) {
// make sure checksum wasn't set before so it doesn't affect output checksum
dc.Checksum = 0
dc.Checksum = checksum.New(dc)
return json.Marshal(*dc)
}
// UnmarshalCheckpoint tries to unmarshal passed bytes to checkpoint
func (dc *DRAManagerCheckpoint) UnmarshalCheckpoint(blob []byte) error {
return json.Unmarshal(blob, dc)
}
// VerifyChecksum verifies that current checksum of checkpoint is valid
func (dc *DRAManagerCheckpoint) VerifyChecksum() error {
ck := dc.Checksum
dc.Checksum = 0
err := ck.Verify(dc)
if err == errors.ErrCorruptCheckpoint {
// Verify with old structs without ResourceHandles field
// TODO: remove in Beta
err = verifyChecksumWithoutResourceHandles(dc, ck)
}
dc.Checksum = ck
return err
}
// verifyChecksumWithoutResourceHandles is a helper function that verifies checksum of the
// checkpoint in the old format, without ResourceHandles field.
// TODO: remove in Beta.
func verifyChecksumWithoutResourceHandles(dc *DRAManagerCheckpoint, checkSum checksum.Checksum) error {
entries := ClaimInfoStateListWithoutResourceHandles{}
for _, entry := range dc.Entries {
entries = append(entries, ClaimInfoStateWithoutResourceHandles{
DriverName: entry.DriverName,
ClassName: entry.ClassName,
ClaimUID: entry.ClaimUID,
ClaimName: entry.ClaimName,
Namespace: entry.Namespace,
PodUIDs: entry.PodUIDs,
CDIDevices: entry.CDIDevices,
})
}
oldcheckpoint := &DRAManagerCheckpointWithoutResourceHandles{
Version: checkpointVersion,
Entries: entries,
Checksum: 0,
}
// Calculate checksum for old checkpoint
object := dump.ForHash(oldcheckpoint)
object = strings.Replace(object, "DRAManagerCheckpointWithoutResourceHandles", "DRAManagerCheckpoint", 1)
object = strings.Replace(object, "ClaimInfoStateListWithoutResourceHandles", "ClaimInfoStateList", 1)
hash := fnv.New32a()
fmt.Fprintf(hash, "%v", object)
if checkSum != checksum.Checksum(hash.Sum32()) {
return errors.ErrCorruptCheckpoint
}
return nil
}