mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
122 lines
3.1 KiB
Go
122 lines
3.1 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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"sigs.k8s.io/kustomize/pkg/gvk"
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"sigs.k8s.io/kustomize/pkg/resmap"
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"sigs.k8s.io/kustomize/pkg/transformers/config"
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)
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type namespaceTransformer struct {
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namespace string
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fieldSpecsToUse []config.FieldSpec
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fieldSpecsToSkip []config.FieldSpec
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}
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var _ Transformer = &namespaceTransformer{}
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// NewNamespaceTransformer construct a namespaceTransformer.
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func NewNamespaceTransformer(ns string, cf []config.FieldSpec) Transformer {
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if len(ns) == 0 {
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return NewNoOpTransformer()
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}
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var skip []config.FieldSpec
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for _, g := range gvk.ClusterLevelGvks() {
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skip = append(skip, config.FieldSpec{Gvk: g})
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}
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return &namespaceTransformer{
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namespace: ns,
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fieldSpecsToUse: cf,
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fieldSpecsToSkip: skip,
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}
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}
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// Transform adds the namespace.
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func (o *namespaceTransformer) Transform(m resmap.ResMap) error {
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mf := resmap.ResMap{}
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for id := range m {
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found := false
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for _, path := range o.fieldSpecsToSkip {
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if id.Gvk().IsSelected(&path.Gvk) {
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found = true
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break
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}
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}
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if !found {
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mf[id] = m[id]
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delete(m, id)
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}
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}
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for id := range mf {
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objMap := mf[id].Map()
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for _, path := range o.fieldSpecsToUse {
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if !id.Gvk().IsSelected(&path.Gvk) {
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continue
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}
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err := mutateField(objMap, path.PathSlice(), path.CreateIfNotPresent, func(_ interface{}) (interface{}, error) {
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return o.namespace, nil
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})
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if err != nil {
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return err
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}
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newid := id.CopyWithNewNamespace(o.namespace)
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m[newid] = mf[id]
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}
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}
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o.updateClusterRoleBinding(m)
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return nil
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}
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func (o *namespaceTransformer) updateClusterRoleBinding(m resmap.ResMap) {
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saMap := map[string]bool{}
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for id := range m {
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if id.Gvk().Equals(gvk.Gvk{Version: "v1", Kind: "ServiceAccount"}) {
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saMap[id.Name()] = true
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}
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}
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for id := range m {
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if id.Gvk().Kind != "ClusterRoleBinding" && id.Gvk().Kind != "RoleBinding" {
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continue
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}
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objMap := m[id].Map()
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subjects := objMap["subjects"].([]interface{})
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for i := range subjects {
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subject := subjects[i].(map[string]interface{})
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kind, foundk := subject["kind"]
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name, foundn := subject["name"]
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if !foundk || !foundn || kind.(string) != "ServiceAccount" {
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continue
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}
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// a ServiceAccount named “default” exists in every active namespace
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if name.(string) == "default" || saMap[name.(string)] {
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subject := subjects[i].(map[string]interface{})
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mutateField(subject, []string{"namespace"}, true, func(_ interface{}) (interface{}, error) {
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return o.namespace, nil
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})
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subjects[i] = subject
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}
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}
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objMap["subjects"] = subjects
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}
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}
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