/
secretgen.go
100 lines (79 loc) · 2.74 KB
/
secretgen.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
// SPDX-FileCopyrightText: The RamenDR authors
// SPDX-License-Identifier: Apache-2.0
package volsync
import (
"context"
"crypto/rand"
"encoding/hex"
"fmt"
"github.com/go-logr/logr"
rmnutil "github.com/ramendr/ramen/controllers/util"
corev1 "k8s.io/api/core/v1"
kerrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
)
const tlsPSKDataSize = 64
// Creates a new volsync replication secret on the cluster (should be called on the hub cluster). If the secret
// already exists, nop
func ReconcileVolSyncReplicationSecret(ctx context.Context, k8sClient client.Client, ownerObject metav1.Object,
secretName, secretNamespace string, log logr.Logger) (*corev1.Secret, error,
) {
existingSecret := &corev1.Secret{}
// See if it exists already
err := k8sClient.Get(ctx, types.NamespacedName{Name: secretName, Namespace: secretNamespace}, existingSecret)
if err != nil && !kerrors.IsNotFound(err) {
log.Error(err, "failed to get secret")
return nil, fmt.Errorf("failed to get secret (%w)", err)
}
if err == nil { // Found the secret, going to assume it doesn't need modification
return existingSecret, nil
}
secret, err := generateNewVolSyncReplicationSecret(secretName, secretNamespace, log)
if err != nil {
return nil, err
}
if err := ctrl.SetControllerReference(ownerObject, secret, k8sClient.Scheme()); err != nil {
log.Error(err, "unable to set controller reference on secret")
return nil, fmt.Errorf("%w", err)
}
log.Info("Creating new volsync rsync secret", "secretName", secretName)
err = k8sClient.Create(ctx, secret)
if err != nil {
log.Error(err, "Error creating secret", "secretName", secretName)
return nil, fmt.Errorf("error creating secret for volsync (%w)", err)
}
return secret, nil
}
// Pre-shared key for rsync TLS mover
func generateNewVolSyncReplicationSecret(secretName, secretNamespace string, log logr.Logger) (*corev1.Secret, error,
) {
tlsKey, err := genTLSPreSharedKey(log)
if err != nil {
log.Error(err, "Unable to generate new tls secret for VolSync replication")
return nil, err
}
secret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: secretName,
Namespace: secretNamespace,
Labels: map[string]string{
rmnutil.OCMBackupLabelKey: rmnutil.OCMBackupLabelValue,
},
},
StringData: map[string]string{
"psk.txt": "volsyncramen:" + tlsKey,
},
}
return secret, nil
}
func genTLSPreSharedKey(log logr.Logger) (string, error) {
pskData := make([]byte, tlsPSKDataSize)
if _, err := rand.Read(pskData); err != nil {
log.Error(err, "error generating tls key")
return "", err
}
return hex.EncodeToString(pskData), nil
}