-
Notifications
You must be signed in to change notification settings - Fork 776
/
fetch.go
291 lines (270 loc) · 10.6 KB
/
fetch.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
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
package common
import (
"context"
"fmt"
"io"
"path/filepath"
"strings"
"github.com/go-git/go-billy/v5"
kyvernov1 "github.com/kyverno/kyverno/api/kyverno/v1"
"github.com/kyverno/kyverno/cmd/cli/kubectl-kyverno/apis/v1alpha1"
"github.com/kyverno/kyverno/cmd/cli/kubectl-kyverno/log"
"github.com/kyverno/kyverno/cmd/cli/kubectl-kyverno/resource"
"github.com/kyverno/kyverno/pkg/autogen"
"github.com/kyverno/kyverno/pkg/clients/dclient"
kubeutils "github.com/kyverno/kyverno/pkg/utils/kube"
"github.com/kyverno/kyverno/pkg/validatingadmissionpolicy"
admissionregistrationv1alpha1 "k8s.io/api/admissionregistration/v1alpha1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime/schema"
)
// GetResources gets matched resources by the given policies
// the resources are fetched from
// - local paths to resources, if given
// - the k8s cluster, if given
func GetResources(
out io.Writer,
policies []kyvernov1.PolicyInterface,
validatingAdmissionPolicies []admissionregistrationv1alpha1.ValidatingAdmissionPolicy,
resourcePaths []string,
dClient dclient.Interface,
cluster bool,
namespace string,
policyReport bool,
) ([]*unstructured.Unstructured, error) {
resources := make([]*unstructured.Unstructured, 0)
var err error
if cluster && dClient != nil {
if len(policies) > 0 {
matchedResources := &KyvernoResources{
policies: policies,
}
resources, err = matchedResources.FetchResourcesFromPolicy(out, resourcePaths, dClient, namespace, policyReport)
if err != nil {
return resources, err
}
}
if len(validatingAdmissionPolicies) > 0 {
matchedResources := &ValidatingAdmissionResources{
policies: validatingAdmissionPolicies,
}
resources, err = matchedResources.FetchResourcesFromPolicy(out, resourcePaths, dClient, namespace, policyReport)
if err != nil {
return resources, err
}
}
} else if len(resourcePaths) > 0 {
resources, err = whenClusterIsFalse(out, resourcePaths, policyReport)
if err != nil {
return resources, err
}
}
return resources, err
}
func whenClusterIsTrue(out io.Writer, resourceTypes []schema.GroupVersionKind, subresourceMap map[schema.GroupVersionKind]v1alpha1.Subresource, dClient dclient.Interface, namespace string, resourcePaths []string, policyReport bool) ([]*unstructured.Unstructured, error) {
resources := make([]*unstructured.Unstructured, 0)
resourceMap, err := getResourcesOfTypeFromCluster(out, resourceTypes, subresourceMap, dClient, namespace)
if err != nil {
return nil, err
}
if len(resourcePaths) == 0 {
for _, rr := range resourceMap {
resources = append(resources, rr)
}
} else {
for _, resourcePath := range resourcePaths {
lenOfResource := len(resources)
for rn, rr := range resourceMap {
s := strings.Split(rn, "-")
if s[2] == resourcePath {
resources = append(resources, rr)
}
}
if lenOfResource >= len(resources) {
if policyReport {
log.Log.V(3).Info(fmt.Sprintf("%s not found in cluster", resourcePath))
} else {
fmt.Fprintf(out, "\n----------------------------------------------------------------------\nresource %s not found in cluster\n----------------------------------------------------------------------\n", resourcePath)
}
return nil, fmt.Errorf("%s not found in cluster", resourcePath)
}
}
}
return resources, nil
}
func whenClusterIsFalse(out io.Writer, resourcePaths []string, policyReport bool) ([]*unstructured.Unstructured, error) {
resources := make([]*unstructured.Unstructured, 0)
for _, resourcePath := range resourcePaths {
resourceBytes, err := resource.GetFileBytes(resourcePath)
if err != nil {
if policyReport {
log.Log.V(3).Info(fmt.Sprintf("failed to load resources: %s.", resourcePath), "error", err)
} else {
fmt.Fprintf(out, "\n----------------------------------------------------------------------\nfailed to load resources: %s. \nerror: %s\n----------------------------------------------------------------------\n", resourcePath, err)
}
continue
}
getResources, err := resource.GetUnstructuredResources(resourceBytes)
if err != nil {
return nil, err
}
resources = append(resources, getResources...)
}
return resources, nil
}
// GetResourcesWithTest with gets matched resources by the given policies
func GetResourcesWithTest(out io.Writer, fs billy.Filesystem, policies []kyvernov1.PolicyInterface, resourcePaths []string, policyResourcePath string) ([]*unstructured.Unstructured, error) {
resources := make([]*unstructured.Unstructured, 0)
resourceTypesMap := make(map[string]bool)
for _, policy := range policies {
for _, rule := range autogen.ComputeRules(policy, "") {
for _, kind := range rule.MatchResources.Kinds {
resourceTypesMap[kind] = true
}
}
}
if len(resourcePaths) > 0 {
for _, resourcePath := range resourcePaths {
var resourceBytes []byte
var err error
if fs != nil {
filep, err := fs.Open(filepath.Join(policyResourcePath, resourcePath))
if err != nil {
fmt.Fprintf(out, "Unable to open resource file: %s. error: %s", resourcePath, err)
continue
}
resourceBytes, _ = io.ReadAll(filep)
} else {
resourceBytes, err = resource.GetFileBytes(resourcePath)
}
if err != nil {
fmt.Fprintf(out, "\n----------------------------------------------------------------------\nfailed to load resources: %s. \nerror: %s\n----------------------------------------------------------------------\n", resourcePath, err)
continue
}
getResources, err := resource.GetUnstructuredResources(resourceBytes)
if err != nil {
return nil, err
}
resources = append(resources, getResources...)
}
}
return resources, nil
}
func getResourcesOfTypeFromCluster(out io.Writer, resourceTypes []schema.GroupVersionKind, subresourceMap map[schema.GroupVersionKind]v1alpha1.Subresource, dClient dclient.Interface, namespace string) (map[string]*unstructured.Unstructured, error) {
r := make(map[string]*unstructured.Unstructured)
for _, kind := range resourceTypes {
resourceList, err := dClient.ListResource(context.TODO(), kind.GroupVersion().String(), kind.Kind, namespace, nil)
if err != nil {
continue
}
gvk := resourceList.GroupVersionKind()
for _, resource := range resourceList.Items {
key := kind.Kind + "-" + resource.GetNamespace() + "-" + resource.GetName()
resource.SetGroupVersionKind(schema.GroupVersionKind{
Group: gvk.Group,
Version: gvk.Version,
Kind: kind.Kind,
})
r[key] = resource.DeepCopy()
}
}
for _, subresource := range subresourceMap {
parentGV := schema.GroupVersion{Group: subresource.ParentResource.Group, Version: subresource.ParentResource.Version}
resourceList, err := dClient.ListResource(context.TODO(), parentGV.String(), subresource.ParentResource.Kind, namespace, nil)
if err != nil {
continue
}
parentResourceNames := make([]string, 0)
for _, resource := range resourceList.Items {
parentResourceNames = append(parentResourceNames, resource.GetName())
}
for _, parentResourceName := range parentResourceNames {
subresourceName := strings.Split(subresource.Subresource.Name, "/")[1]
resource, err := dClient.GetResource(context.TODO(), parentGV.String(), subresource.ParentResource.Kind, namespace, parentResourceName, subresourceName)
if err != nil {
fmt.Fprintf(out, "Error: %s", err.Error())
continue
}
key := subresource.Subresource.Kind + "-" + resource.GetNamespace() + "-" + resource.GetName()
resource.SetGroupVersionKind(schema.GroupVersionKind{
Group: subresource.Subresource.Group,
Version: subresource.Subresource.Version,
Kind: subresource.Subresource.Kind,
})
r[key] = resource.DeepCopy()
}
}
return r, nil
}
// GetPatchedAndGeneratedResource converts raw bytes to unstructured object
func GetPatchedAndGeneratedResource(resourceBytes []byte) (unstructured.Unstructured, error) {
getResource, err := resource.GetUnstructuredResources(resourceBytes)
if err != nil {
return unstructured.Unstructured{}, err
}
if len(getResource) > 0 && getResource[0] != nil {
resource := *getResource[0]
return resource, nil
}
return unstructured.Unstructured{}, err
}
// GetKindsFromRule will return the kinds from policy match block
func GetKindsFromRule(rule kyvernov1.Rule, client dclient.Interface) (map[schema.GroupVersionKind]bool, map[schema.GroupVersionKind]v1alpha1.Subresource) {
resourceTypesMap := make(map[schema.GroupVersionKind]bool)
subresourceMap := make(map[schema.GroupVersionKind]v1alpha1.Subresource)
for _, kind := range rule.MatchResources.Kinds {
addGVKToResourceTypesMap(kind, resourceTypesMap, subresourceMap, client)
}
if rule.MatchResources.Any != nil {
for _, resFilter := range rule.MatchResources.Any {
for _, kind := range resFilter.ResourceDescription.Kinds {
addGVKToResourceTypesMap(kind, resourceTypesMap, subresourceMap, client)
}
}
}
if rule.MatchResources.All != nil {
for _, resFilter := range rule.MatchResources.All {
for _, kind := range resFilter.ResourceDescription.Kinds {
addGVKToResourceTypesMap(kind, resourceTypesMap, subresourceMap, client)
}
}
}
return resourceTypesMap, subresourceMap
}
func getKindsFromValidatingAdmissionPolicy(policy admissionregistrationv1alpha1.ValidatingAdmissionPolicy, client dclient.Interface) (map[schema.GroupVersionKind]bool, map[schema.GroupVersionKind]v1alpha1.Subresource) {
resourceTypesMap := make(map[schema.GroupVersionKind]bool)
subresourceMap := make(map[schema.GroupVersionKind]v1alpha1.Subresource)
kinds := validatingadmissionpolicy.GetKinds(policy)
for _, kind := range kinds {
addGVKToResourceTypesMap(kind, resourceTypesMap, subresourceMap, client)
}
return resourceTypesMap, subresourceMap
}
func addGVKToResourceTypesMap(kind string, resourceTypesMap map[schema.GroupVersionKind]bool, subresourceMap map[schema.GroupVersionKind]v1alpha1.Subresource, client dclient.Interface) {
group, version, kind, subresource := kubeutils.ParseKindSelector(kind)
gvrss, err := client.Discovery().FindResources(group, version, kind, subresource)
if err != nil {
log.Log.Info("failed to find resource", "kind", kind, "error", err)
return
}
for parent, child := range gvrss {
// The resource is not a subresource
if parent.SubResource == "" {
resourceTypesMap[parent.GroupVersionKind()] = true
} else {
gvk := schema.GroupVersionKind{
Group: child.Group, Version: child.Version, Kind: child.Kind,
}
subresourceMap[gvk] = v1alpha1.Subresource{
Subresource: child,
ParentResource: metav1.APIResource{
Group: parent.Group,
Version: parent.Version,
Kind: parent.Kind,
Name: parent.Resource,
},
}
}
}
}