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refactor ParsePodAnnotations into annotations package
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"). | ||
| You may not use this file except in compliance with the License. | ||
| A copy of the License is located at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| or in the "license" file accompanying this file. This file 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 annotations | ||
|
|
||
| import ( | ||
| "encoding/csv" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/aws/amazon-eks-pod-identity-webhook/pkg" | ||
| corev1 "k8s.io/api/core/v1" | ||
| "k8s.io/klog/v2" | ||
| ) | ||
|
|
||
| type PodAnnotations struct { | ||
| tokenExpiration *int64 | ||
| containersToSkip map[string]bool | ||
| } | ||
|
|
||
| func (a *PodAnnotations) GetContainersToSkip() map[string]bool { | ||
| return a.containersToSkip | ||
| } | ||
|
|
||
| func (a *PodAnnotations) GetTokenExpiration(fallback int64) int64 { | ||
| if a.tokenExpiration == nil { | ||
| return fallback | ||
| } else { | ||
| return *a.tokenExpiration | ||
| } | ||
| } | ||
|
|
||
| // parsePodAnnotations parses the pod annotations that can influence mutation: | ||
| // - tokenExpiration. Overrides the given service account annotation/flag-level | ||
| // setting. | ||
| // - containersToSkip. A Pod specific setting since certain containers within a | ||
| // specific pod might need to be opted-out of mutation | ||
| func ParsePodAnnotations(pod *corev1.Pod, annotationDomain string) *PodAnnotations { | ||
| return &PodAnnotations{ | ||
| tokenExpiration: parseTokenExpiration(annotationDomain, pod), | ||
| containersToSkip: parseContainersToSkip(annotationDomain, pod), | ||
| } | ||
| } | ||
|
|
||
| // parseContainersToSkip returns the containers of a pod to skip mutating | ||
| func parseContainersToSkip(annotationDomain string, pod *corev1.Pod) map[string]bool { | ||
| skippedNames := map[string]bool{} | ||
| skipContainersKey := annotationDomain + "/" + SkipContainersAnnotation | ||
|
|
||
| value, ok := pod.Annotations[skipContainersKey] | ||
| if !ok { | ||
| return nil | ||
| } | ||
| r := csv.NewReader(strings.NewReader(value)) | ||
| // error means we don't skip any | ||
| podNames, err := r.Read() | ||
| if err != nil { | ||
| klog.Infof("Could not parse skip containers annotation on pod %s/%s: %v", pod.Namespace, pod.Name, err) | ||
| return nil | ||
| } | ||
| for _, name := range podNames { | ||
| skippedNames[name] = true | ||
| } | ||
| return skippedNames | ||
| } | ||
|
|
||
| func parseTokenExpiration(annotationDomain string, pod *corev1.Pod) *int64 { | ||
| expirationKey := annotationDomain + "/" + TokenExpirationAnnotation | ||
| expirationStr, ok := pod.Annotations[expirationKey] | ||
| if !ok { | ||
| return nil | ||
| } | ||
|
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| expiration, err := strconv.ParseInt(expirationStr, 10, 64) | ||
| if err != nil { | ||
| klog.V(4).Infof("Found invalid value for token expiration on the pod annotation: %s, falling back to the default: %v", expirationStr, err) | ||
| return nil | ||
| } | ||
|
|
||
| val := pkg.ValidateMinTokenExpiration(expiration) | ||
| return &val | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| /* | ||
| Copyright 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
| Licensed under the Apache License, Version 2.0 (the "License"). | ||
| You may not use this file except in compliance with the License. | ||
| A copy of the License is located at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| or in the "license" file accompanying this file. This file 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 annotations | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "github.com/stretchr/testify/assert" | ||
| corev1 "k8s.io/api/core/v1" | ||
| "sigs.k8s.io/yaml" | ||
| ) | ||
|
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| func TestParsePodAnnotations(t *testing.T) { | ||
| podNoAnnotations := ` | ||
| apiVersion: v1 | ||
| kind: Pod | ||
| metadata: | ||
| name: balajilovesoreos` | ||
| testcases := []struct { | ||
| name string | ||
| pod string | ||
|
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| expectedContainersToSkip map[string]bool | ||
|
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| fallbackExpiration int64 | ||
| expectedExpiration int64 | ||
| }{ | ||
| { | ||
| name: "sidecar-containers", | ||
| pod: ` | ||
| apiVersion: v1 | ||
| kind: Pod | ||
| metadata: | ||
| name: balajilovesoreos | ||
| annotations: | ||
| testing.eks.amazonaws.com/skip-containers: "sidecar,foo" | ||
| `, | ||
| expectedContainersToSkip: map[string]bool{"sidecar": true, "foo": true}, | ||
| }, | ||
| { | ||
| name: "token-expiration", | ||
| pod: ` | ||
| apiVersion: v1 | ||
| kind: Pod | ||
| metadata: | ||
| name: balajilovesoreos | ||
| annotations: | ||
| testing.eks.amazonaws.com/token-expiration: "1234" | ||
| `, | ||
| fallbackExpiration: 4567, | ||
| expectedExpiration: 1234, | ||
| }, | ||
| { | ||
| name: "token-expiration fallback", | ||
| pod: podNoAnnotations, | ||
| fallbackExpiration: 4567, | ||
| expectedExpiration: 4567, | ||
| }, | ||
| { | ||
| name: "token-expiration round up to min value", | ||
| pod: ` | ||
| apiVersion: v1 | ||
| kind: Pod | ||
| metadata: | ||
| name: balajilovesoreos | ||
| annotations: | ||
| testing.eks.amazonaws.com/token-expiration: "0" | ||
| `, | ||
| fallbackExpiration: 4567, | ||
| expectedExpiration: 600, | ||
| }, | ||
| } | ||
|
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| for _, tc := range testcases { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| var pod *corev1.Pod | ||
|
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| err := yaml.Unmarshal([]byte(tc.pod), &pod) | ||
| assert.NoError(t, err) | ||
|
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| actual := ParsePodAnnotations(pod, "testing.eks.amazonaws.com") | ||
| assert.Equal(t, tc.expectedContainersToSkip, actual.GetContainersToSkip()) | ||
| assert.Equal(t, tc.expectedExpiration, actual.GetTokenExpiration(tc.fallbackExpiration)) | ||
| }) | ||
| } | ||
| } |
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