-
Notifications
You must be signed in to change notification settings - Fork 451
/
dnsrecord.go
124 lines (100 loc) · 5.45 KB
/
dnsrecord.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
123
124
// Copyright 2021 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 validation
import (
"strings"
"github.com/go-test/deep"
apiequality "k8s.io/apimachinery/pkg/api/equality"
apivalidation "k8s.io/apimachinery/pkg/api/validation"
"k8s.io/apimachinery/pkg/util/validation"
"k8s.io/apimachinery/pkg/util/validation/field"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/utils"
)
// ValidateDNSRecord validates a DNSRecord object.
func ValidateDNSRecord(dns *extensionsv1alpha1.DNSRecord) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateObjectMeta(&dns.ObjectMeta, true, apivalidation.NameIsDNSSubdomain, field.NewPath("metadata"))...)
allErrs = append(allErrs, ValidateDNSRecordSpec(&dns.Spec, field.NewPath("spec"))...)
return allErrs
}
// ValidateDNSRecordUpdate validates a DNSRecord object before an update.
func ValidateDNSRecordUpdate(new, old *extensionsv1alpha1.DNSRecord) field.ErrorList {
allErrs := field.ErrorList{}
allErrs = append(allErrs, apivalidation.ValidateObjectMetaUpdate(&new.ObjectMeta, &old.ObjectMeta, field.NewPath("metadata"))...)
allErrs = append(allErrs, ValidateDNSRecordSpecUpdate(&new.Spec, &old.Spec, new.DeletionTimestamp != nil, field.NewPath("spec"))...)
allErrs = append(allErrs, ValidateDNSRecord(new)...)
return allErrs
}
// ValidateDNSRecordSpec validates the specification of a DNSRecord object.
func ValidateDNSRecordSpec(spec *extensionsv1alpha1.DNSRecordSpec, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if len(spec.Type) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("type"), "field is required"))
}
if len(spec.SecretRef.Name) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("secretRef", "name"), "field is required"))
}
if spec.Region != nil && len(*spec.Region) == 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("region"), *spec.Region, "field cannot be empty if specified"))
}
if spec.Zone != nil && len(*spec.Zone) == 0 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("zone"), *spec.Zone, "field cannot be empty if specified"))
}
// This will return FieldValueRequired for an empty spec.Name
allErrs = append(allErrs, validation.IsFullyQualifiedDomainName(fldPath.Child("name"), strings.TrimPrefix(spec.Name, "*."))...)
validRecordTypes := []string{string(extensionsv1alpha1.DNSRecordTypeA), string(extensionsv1alpha1.DNSRecordTypeAAAA), string(extensionsv1alpha1.DNSRecordTypeCNAME), string(extensionsv1alpha1.DNSRecordTypeTXT)}
if !utils.ValueExists(string(spec.RecordType), validRecordTypes) {
allErrs = append(allErrs, field.NotSupported(fldPath.Child("recordType"), spec.RecordType, validRecordTypes))
}
if len(spec.Values) == 0 {
allErrs = append(allErrs, field.Required(fldPath.Child("values"), "field is required"))
}
if spec.RecordType == extensionsv1alpha1.DNSRecordTypeCNAME && len(spec.Values) > 1 {
allErrs = append(allErrs, field.Invalid(fldPath.Child("values"), spec.Values, "CNAME records must have a single value"))
}
for i, value := range spec.Values {
allErrs = append(allErrs, validateValue(spec.RecordType, value, fldPath.Child("values").Index(i))...)
}
if spec.TTL != nil {
allErrs = append(allErrs, apivalidation.ValidateNonnegativeField(*spec.TTL, fldPath.Child("ttl"))...)
}
return allErrs
}
// ValidateDNSRecordSpecUpdate validates the spec of a DNSRecord object before an update.
func ValidateDNSRecordSpecUpdate(new, old *extensionsv1alpha1.DNSRecordSpec, deletionTimestampSet bool, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
if deletionTimestampSet && !apiequality.Semantic.DeepEqual(new, old) {
if diff := deep.Equal(new, old); diff != nil {
return field.ErrorList{field.Forbidden(fldPath, strings.Join(diff, ","))}
}
return apivalidation.ValidateImmutableField(new, old, fldPath)
}
allErrs = append(allErrs, apivalidation.ValidateImmutableField(new.Type, old.Type, fldPath.Child("type"))...)
allErrs = append(allErrs, apivalidation.ValidateImmutableField(new.Name, old.Name, fldPath.Child("name"))...)
allErrs = append(allErrs, apivalidation.ValidateImmutableField(new.RecordType, old.RecordType, fldPath.Child("recordType"))...)
return allErrs
}
func validateValue(recordType extensionsv1alpha1.DNSRecordType, value string, fldPath *field.Path) field.ErrorList {
allErrs := field.ErrorList{}
switch recordType {
case extensionsv1alpha1.DNSRecordTypeA:
allErrs = append(allErrs, validation.IsValidIPv4Address(fldPath, value)...)
case extensionsv1alpha1.DNSRecordTypeAAAA:
allErrs = append(allErrs, validation.IsValidIPv6Address(fldPath, value)...)
case extensionsv1alpha1.DNSRecordTypeCNAME:
allErrs = append(allErrs, validation.IsFullyQualifiedDomainName(fldPath, value)...)
}
return allErrs
}