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Signed-off-by: yaroslavborbat <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| package rewriter | ||
|
|
||
| import ( | ||
| "github.com/tidwall/gjson" | ||
| "github.com/tidwall/sjson" | ||
| ) | ||
|
|
||
| // RewriteAdmissionReview rewrites AdmissionReview request and response. | ||
| // NOTE: action is not supported yet, Restore is assumed for AdmissionReview | ||
| // request from Kubernetes API Server. Response is passed back to server as is. | ||
| func RewriteAdmissionReview(rules *RewriteRules, obj []byte, origGroup string) ([]byte, error) { | ||
| response := gjson.GetBytes(obj, "response") | ||
| if response.Exists() { | ||
| // TODO rewrite response with the Patch. | ||
| return obj, nil | ||
| } | ||
|
|
||
| request := gjson.GetBytes(obj, "request") | ||
| if request.Exists() { | ||
| newRequest, err := RewriteAdmissionReviewRequest(rules, []byte(request.Raw), origGroup) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if len(newRequest) > 0 { | ||
| obj, err = sjson.SetRawBytes(obj, "request", newRequest) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return obj, nil | ||
| } | ||
|
|
||
| // RewriteAdmissionReviewRequest restores apiVersion, kind and other fields in an AdmissionReview request. | ||
| // Only restoring is required, as AdmissionReview request only comes from API Server. | ||
| func RewriteAdmissionReviewRequest(rules *RewriteRules, obj []byte, origGroup string) ([]byte, error) { | ||
| var err error | ||
|
|
||
| // Rewrite "resource" field and find rules. | ||
| { | ||
| resourceObj := gjson.GetBytes(obj, "resource") | ||
| group := resourceObj.Get("group") | ||
| resource := resourceObj.Get("resource") | ||
| // Ignore reviews for unknown renamed group. | ||
| if group.String() != rules.RenamedGroup { | ||
| return nil, nil | ||
| } | ||
| newResource := rules.RestoreResource(resource.String()) | ||
| obj, err = sjson.SetBytes(obj, "resource.resource", newResource) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| obj, err = sjson.SetBytes(obj, "resource.group", origGroup) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| // Rewrite "requestResource" field. | ||
| { | ||
| fieldObj := gjson.GetBytes(obj, "requestResource") | ||
| group := fieldObj.Get("group") | ||
| resource := fieldObj.Get("resource") | ||
| // Ignore reviews for unknown renamed group. | ||
| if group.String() != rules.RenamedGroup { | ||
| return nil, nil | ||
| } | ||
| newResource := rules.RestoreResource(resource.String()) | ||
| obj, err = sjson.SetBytes(obj, "requestResource.resource", newResource) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| obj, err = sjson.SetBytes(obj, "requestResource.group", origGroup) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| // Check "subresource" field. No need to rewrite kind, requestKind, object and oldObject fields if subresource is set. | ||
| { | ||
| fieldObj := gjson.GetBytes(obj, "subresource") | ||
| if fieldObj.Exists() && fieldObj.String() != "" { | ||
| return obj, err | ||
| } | ||
| } | ||
|
|
||
| // Rewrite "kind" field. | ||
| { | ||
| fieldObj := gjson.GetBytes(obj, "kind") | ||
| kind := fieldObj.Get("kind") | ||
| newKind := rules.RestoreKind(kind.String()) | ||
| obj, err = sjson.SetBytes(obj, "kind.kind", newKind) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| obj, err = sjson.SetBytes(obj, "kind.group", origGroup) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| // Rewrite "requestKind" field. | ||
| { | ||
| fieldObj := gjson.GetBytes(obj, "requestKind") | ||
| kind := fieldObj.Get("kind") | ||
| newKind := rules.RestoreKind(kind.String()) | ||
| obj, err = sjson.SetBytes(obj, "requestKind.kind", newKind) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| obj, err = sjson.SetBytes(obj, "requestKind.group", origGroup) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
||
| // Rewrite "object" field. | ||
| { | ||
| fieldObj := gjson.GetBytes(obj, "object") | ||
| if fieldObj.Exists() { | ||
| newField, err := RestoreResource(rules, []byte(fieldObj.Raw), origGroup) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if len(newField) > 0 { | ||
| obj, err = sjson.SetRawBytes(obj, "object", newField) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Rewrite "oldObject" field. | ||
| { | ||
| fieldObj := gjson.GetBytes(obj, "oldObject") | ||
| if fieldObj.Exists() { | ||
| newField, err := RestoreResource(rules, []byte(fieldObj.Raw), origGroup) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if len(newField) > 0 { | ||
| obj, err = sjson.SetRawBytes(obj, "oldObject", newField) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return obj, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| package rewriter | ||
|
|
||
| const ( | ||
| MutatingWebhookConfigurationKind = "MutatingWebhookConfiguration" | ||
| MutatingWebhookConfigurationListKind = "MutatingWebhookConfigurationList" | ||
| ) | ||
|
|
||
| func RewriteMutatingOrList(rules *RewriteRules, obj []byte, action Action) ([]byte, error) { | ||
| return obj, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| package rewriter | ||
|
|
||
| const ( | ||
| ValidatingWebhookConfigurationKind = "ValidatingWebhookConfiguration" | ||
| ValidatingWebhookConfigurationListKind = "ValidatingWebhookConfigurationList" | ||
| ) | ||
|
|
||
| func RewriteValidatingOrList(rules *RewriteRules, obj []byte, action Action) ([]byte, error) { | ||
| return obj, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -71,4 +71,4 @@ spec: | |
| volumeMounts: | ||
| - name: kube-api-proxy-kubeconfig | ||
| mountPath: /kubeconfig.local | ||
| {{- end -}} | ||
| {{- end -}} | ||
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