105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package transformers
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import (
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"encoding/json"
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"fmt"
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"k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/kubectl/pkg/kinflate/hash"
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"k8s.io/kubectl/pkg/kinflate/resource"
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"k8s.io/kubectl/pkg/kinflate/types"
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)
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// nameHashTransformer contains the prefix and the path config for each field that
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// the name prefix will be applied.
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type nameHashTransformer struct{}
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var _ Transformer = &nameHashTransformer{}
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// NewNameHashTransformer construct a nameHashTransformer.
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func NewNameHashTransformer() Transformer {
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return &nameHashTransformer{}
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}
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// Transform appends hash to configmaps and secrets.
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func (o *nameHashTransformer) Transform(m resource.ResourceCollection) error {
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for gvkn, obj := range m {
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switch {
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case types.SelectByGVK(gvkn.GVK, &schema.GroupVersionKind{Version: "v1", Kind: "ConfigMap"}):
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appendHashForConfigMap(obj.Data)
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case types.SelectByGVK(gvkn.GVK, &schema.GroupVersionKind{Version: "v1", Kind: "Secret"}):
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appendHashForSecret(obj.Data)
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}
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}
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return nil
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}
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func appendHashForConfigMap(obj *unstructured.Unstructured) error {
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cm, err := unstructuredToConfigmap(obj)
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if err != nil {
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return err
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}
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h, err := hash.ConfigMapHash(cm)
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if err != nil {
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return err
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}
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nameWithHash := fmt.Sprintf("%s-%s", obj.GetName(), h)
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obj.SetName(nameWithHash)
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return nil
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}
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// TODO: Remove this function after we support hash unstructured objects
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func unstructuredToConfigmap(in *unstructured.Unstructured) (*v1.ConfigMap, error) {
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marshaled, err := json.Marshal(in)
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if err != nil {
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return nil, err
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}
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var out v1.ConfigMap
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err = json.Unmarshal(marshaled, &out)
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return &out, err
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}
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func appendHashForSecret(obj *unstructured.Unstructured) error {
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secret, err := unstructuredToSecret(obj)
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if err != nil {
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return err
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}
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h, err := hash.SecretHash(secret)
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if err != nil {
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return err
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}
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nameWithHash := fmt.Sprintf("%s-%s", obj.GetName(), h)
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obj.SetName(nameWithHash)
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return nil
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}
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// TODO: Remove this function after we support hash unstructured objects
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func unstructuredToSecret(in *unstructured.Unstructured) (*v1.Secret, error) {
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marshaled, err := json.Marshal(in)
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if err != nil {
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return nil, err
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}
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var out v1.Secret
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err = json.Unmarshal(marshaled, &out)
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return &out, err
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}
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