/
resources.go
269 lines (210 loc) · 9.17 KB
/
resources.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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
package support_archive
import (
"bytes"
"context"
"fmt"
"strings"
"github.com/Dynatrace/dynatrace-operator/pkg/logd"
admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
"k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/discovery"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/yaml"
)
const (
k8sResourceCollectorName = "k8sResourceCollector"
webhookValidatorName = "dynatrace-webhook"
crdNameSuffix = "dynatrace.com"
)
type k8sResourceCollector struct {
collectorCommon
discoveryClient discovery.DiscoveryInterface
context context.Context
apiReader client.Reader
namespace string
appName string
}
func newK8sObjectCollector(context context.Context, log logd.Logger, supportArchive archiver, namespace string, appName string, apiReader client.Reader, discoveryClient discovery.DiscoveryInterface) collector { //nolint:revive // argument-limit doesn't apply to constructors
return k8sResourceCollector{
collectorCommon: collectorCommon{
log: log,
supportArchive: supportArchive,
},
context: context,
namespace: namespace,
appName: appName,
apiReader: apiReader,
discoveryClient: discoveryClient,
}
}
func (collector k8sResourceCollector) Do() error {
logInfof(collector.log, "Starting K8S resource collection")
numberOfStorages := 0
for _, query := range getQueries(collector.namespace, collector.appName) {
resourceList, err := collector.readObjectsList(query.groupVersionKind, query.filters)
if err != nil {
logErrorf(collector.log, err, "could not get manifest for %s", query.groupVersionKind.String())
continue
}
for _, resource := range resourceList.Items {
numberOfStorages++
collector.storeObject(resource)
}
}
if numberOfStorages > 0 {
webhookConfigurations, err := collector.readWebhookConfigurations()
if err != nil {
logErrorf(collector.log, err, "could not read webhook configurations")
return err
}
for _, resource := range webhookConfigurations.Items {
collector.storeObject(resource)
}
customResourceDefinitions, err := collector.readCustomResourceDefinitions()
if err != nil {
logErrorf(collector.log, err, "could not read custom resource definitions")
return err
}
for _, resource := range customResourceDefinitions.Items {
collector.storeObject(resource)
}
}
return nil
}
func (collector k8sResourceCollector) Name() string {
return k8sResourceCollectorName
}
func (collector k8sResourceCollector) readObjectsList(groupVersionKind schema.GroupVersionKind, listOptions []client.ListOption) (*unstructured.UnstructuredList, error) {
resourceList := &unstructured.UnstructuredList{}
resourceList.SetGroupVersionKind(groupVersionKind)
err := collector.apiReader.List(collector.context, resourceList, listOptions...)
if err != nil {
return nil, err
}
return resourceList, nil
}
func (collector k8sResourceCollector) readWebhookConfigurations() (*unstructured.UnstructuredList, error) {
resourceList := &unstructured.UnstructuredList{}
resourceList.SetGroupVersionKind(toGroupVersionKind(admissionregistrationv1.SchemeGroupVersion, admissionregistrationv1.MutatingWebhookConfiguration{}))
resourceList.SetGroupVersionKind(toGroupVersionKind(admissionregistrationv1.SchemeGroupVersion, admissionregistrationv1.ValidatingWebhookConfiguration{}))
var mutatingWebhookConfiguration admissionregistrationv1.MutatingWebhookConfiguration
err := collector.apiReader.Get(collector.context, client.ObjectKey{Name: webhookValidatorName}, &mutatingWebhookConfiguration)
if err != nil {
return nil, err
}
resourceList.Items = append(resourceList.Items, collector.getMutatingWebhookConfiguration(mutatingWebhookConfiguration))
var validatingWebhookConfiguration admissionregistrationv1.ValidatingWebhookConfiguration
err = collector.apiReader.Get(collector.context, client.ObjectKey{Name: webhookValidatorName}, &validatingWebhookConfiguration)
if err != nil {
return nil, err
}
resourceList.Items = append(resourceList.Items, collector.getValidatingWebhookConfiguration(validatingWebhookConfiguration))
return resourceList, nil
}
func (collector k8sResourceCollector) readCustomResourceDefinitions() (*unstructured.UnstructuredList, error) {
resourceList := &unstructured.UnstructuredList{}
resourceList.SetGroupVersionKind(toGroupVersionKind(v1.SchemeGroupVersion, v1.CustomResourceDefinition{}))
_, resources, err := collector.discoveryClient.ServerGroupsAndResources()
if err != nil {
return nil, err
}
crds := map[string]unstructured.Unstructured{}
for _, resource := range resources {
if strings.Contains(resource.GroupVersion, crdNameSuffix) {
for _, apiResource := range resource.APIResources {
// Not only the CRDs but also their statuses are listed. As we are only interested in the CRDs I have to exclude those statuses
if !strings.Contains(apiResource.Name, "/status") {
var crd v1.CustomResourceDefinition
err = collector.apiReader.Get(collector.context, client.ObjectKey{Name: fmt.Sprintf("%s.%s", apiResource.Name, crdNameSuffix)}, &crd)
if err != nil {
return nil, err
}
crds[apiResource.Name] = collector.getCRD(crd)
}
}
}
}
for _, crd := range crds {
resourceList.Items = append(resourceList.Items, crd)
}
return resourceList, nil
}
func (collector k8sResourceCollector) getCRD(customResourceDefinition v1.CustomResourceDefinition) unstructured.Unstructured {
return unstructured.Unstructured{
Object: map[string]any{
"apiVersion": v1.GroupName,
"kind": CRDKindName,
"metadata": customResourceDefinition.ObjectMeta,
"spec": customResourceDefinition.Spec,
"status": customResourceDefinition.Status,
},
}
}
func (collector k8sResourceCollector) getValidatingWebhookConfiguration(validatingWebhookConfig admissionregistrationv1.ValidatingWebhookConfiguration) unstructured.Unstructured {
return unstructured.Unstructured{
Object: map[string]any{
"apiVersion": admissionregistrationv1.GroupName,
"kind": ValidatingWebhookConfigurationKind,
"metadata": validatingWebhookConfig.ObjectMeta,
"webhooks": validatingWebhookConfig.Webhooks,
},
}
}
func (collector k8sResourceCollector) getMutatingWebhookConfiguration(mutatingWebhookConfig admissionregistrationv1.MutatingWebhookConfiguration) unstructured.Unstructured {
return unstructured.Unstructured{
Object: map[string]any{
"apiVersion": admissionregistrationv1.GroupName,
"kind": MutatingWebhookConfigurationKind,
"metadata": mutatingWebhookConfig.ObjectMeta,
"webhooks": mutatingWebhookConfig.Webhooks,
},
}
}
func (collector k8sResourceCollector) storeObject(resource unstructured.Unstructured) {
yamlManifest, err := yaml.Marshal(resource)
if err != nil {
logErrorf(collector.log, err, "Failed to marshal %s %s/%s", resource.GetKind(), collector.namespace, resource.GetName())
return
}
fileName := collector.createFileName(resource.GetKind(), resource)
err = collector.supportArchive.addFile(fileName, bytes.NewBuffer(yamlManifest))
if err != nil {
logErrorf(collector.log, err, "Failed to add %s to support archive", fileName)
return
}
logInfof(collector.log, "Collected manifest for %s", fileName)
}
func isWebhookConfiguration(resourceMeta unstructured.Unstructured) bool {
return resourceMeta.GetKind() == ValidatingWebhookConfigurationKind || resourceMeta.GetKind() == MutatingWebhookConfigurationKind
}
func (collector k8sResourceCollector) getCRDName(resourceMeta unstructured.Unstructured) string {
field, found, err := unstructured.NestedFieldNoCopy(resourceMeta.Object, "metadata")
if !found || err != nil {
logErrorf(collector.log, err, "Could not determine CRD name, setting it to default")
return "default"
}
objectMeta, ok := field.(metav1.ObjectMeta)
if !ok {
logErrorf(collector.log, err, "Could not determine CRD name, setting it to default")
return "default"
}
return strings.Split(objectMeta.Name, ".")[0]
}
func (collector k8sResourceCollector) createFileName(kind string, resourceMeta unstructured.Unstructured) string {
kind = strings.ToLower(kind)
switch {
case resourceMeta.GetNamespace() != "":
return fmt.Sprintf("%s/%s/%s/%s%s", ManifestsDirectoryName, resourceMeta.GetNamespace(), kind, resourceMeta.GetName(), ManifestsFileExtension)
case resourceMeta.GetName() == collector.namespace:
return fmt.Sprintf("%s/%s/%s-%s%s", ManifestsDirectoryName, collector.namespace, kind, resourceMeta.GetName(), ManifestsFileExtension)
case isWebhookConfiguration(resourceMeta):
return fmt.Sprintf("%s/%s/%s%s", ManifestsDirectoryName, WebhookConfigurationsDirectoryName, strings.ToLower(resourceMeta.GetKind()), ManifestsFileExtension)
case resourceMeta.GetKind() == CRDKindName:
return fmt.Sprintf("%s/%s/%s-%s%s", ManifestsDirectoryName, CRDDirectoryName, strings.ToLower(resourceMeta.GetKind()), collector.getCRDName(resourceMeta), ManifestsFileExtension)
default:
return fmt.Sprintf("%s/%s/%s-%s%s", ManifestsDirectoryName, InjectedNamespacesManifestsDirectoryName, kind, resourceMeta.GetName(), ManifestsFileExtension)
}
}