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strategy.go
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strategy.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. 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. You may obtain a copy of the
* License at
*
* https://opensource.org/licenses/Apache-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package policy
import (
"context"
"encoding/json"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/apiserver/pkg/endpoints/request"
"k8s.io/apiserver/pkg/registry/generic/registry"
"k8s.io/apiserver/pkg/registry/rest"
"k8s.io/apiserver/pkg/storage/names"
"k8s.io/kubectl/pkg/util/rbac"
"tkestack.io/tke/api/authz"
platformversionedclient "tkestack.io/tke/api/client/clientset/versioned/typed/platform/v1"
"tkestack.io/tke/pkg/apiserver/authentication"
authzprovider "tkestack.io/tke/pkg/authz/provider"
"tkestack.io/tke/pkg/util/log"
namesutil "tkestack.io/tke/pkg/util/names"
)
// Strategy implements verification logic for configmap.
type Strategy struct {
runtime.ObjectTyper
names.NameGenerator
platformClient platformversionedclient.PlatformV1Interface
}
const (
NamePrefix = "pol-"
)
var _ rest.RESTCreateStrategy = &Strategy{}
var _ rest.RESTUpdateStrategy = &Strategy{}
var _ rest.RESTDeleteStrategy = &Strategy{}
// NewStrategy creates a strategy that is the default logic that applies when
// creating and updating namespace set objects.
func NewStrategy(platformClient platformversionedclient.PlatformV1Interface) *Strategy {
return &Strategy{authz.Scheme, namesutil.Generator, platformClient}
}
func ShouldDeleteDuringUpdate(ctx context.Context, key string, obj, existing runtime.Object) bool {
pol, ok := obj.(*authz.Policy)
if !ok {
log.Errorf("unexpected object, key:%s", key)
return false
}
return len(pol.Finalizers) == 0 && registry.ShouldDeleteDuringUpdate(ctx, key, obj, existing)
}
// DefaultGarbageCollectionPolicy returns the default garbage collection behavior.
func (Strategy) DefaultGarbageCollectionPolicy(ctx context.Context) rest.GarbageCollectionPolicy {
return rest.Unsupported
}
// NamespaceScoped is false for namespaceSets
func (Strategy) NamespaceScoped() bool {
return true
}
// Export strips fields that can not be set by the user.
func (Strategy) Export(ctx context.Context, obj runtime.Object, exact bool) error {
return nil
}
// PrepareForCreate is invoked on create before validation to normalize
// the object.
func (Strategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
username, _ := authentication.UsernameAndTenantID(ctx)
tenantID := request.NamespaceValue(ctx)
if tenantID == "" {
tenantID = "default"
}
policy := obj.(*authz.Policy)
policy.TenantID = tenantID
if policy.Username == "" {
policy.Username = username
}
if policy.Name == "" && policy.GenerateName == "" {
policy.GenerateName = NamePrefix
}
policy.Rules = compactRules(policy.Rules)
region := authentication.GetExtraValue("region", ctx)
log.Debugf("region '%v'", region)
if len(region) != 0 {
annotations := policy.Annotations
if len(annotations) == 0 {
annotations = map[string]string{}
}
annotations[authz.GroupName+"/region"] = region[0]
policy.Annotations = annotations
}
}
func compactRules(rules []rbacv1.PolicyRule) []rbacv1.PolicyRule {
if len(rules) != 0 {
for _, rule := range rules {
apiGroups := rule.APIGroups
for j := range rule.APIGroups {
if apiGroups[j] == "" || apiGroups[j] == "\"\"" || apiGroups[j] == "'\"\"'" {
apiGroups[j] = ""
}
}
}
compactedRules, err := rbac.CompactRules(rules)
if err != nil {
marshal, _ := json.Marshal(rules)
log.Errorf("unexpected object, rules:%s", marshal)
} else {
return compactedRules
}
}
return rules
}
// PrepareForUpdate is invoked on update before validation to normalize the
// object.
func (Strategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
oldPolicy := old.(*authz.Policy)
policy, _ := obj.(*authz.Policy)
if policy.TenantID != oldPolicy.TenantID {
log.Warnf("Unauthorized update policy tenantID '%s'", oldPolicy.TenantID)
policy.TenantID = oldPolicy.TenantID
}
policy.Rules = compactRules(policy.Rules)
}
// Validate validates a new configmap.
func (s Strategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
policy := obj.(*authz.Policy)
provider, err := authzprovider.GetProvider(policy.Annotations)
if err == nil {
if fieldErr := provider.Validate(context.TODO(), policy, s.platformClient); fieldErr != nil {
return field.ErrorList{fieldErr}
}
}
return ValidatePolicy(policy, s.platformClient)
}
// AllowCreateOnUpdate is false for persistent events
func (Strategy) AllowCreateOnUpdate() bool {
return false
}
// AllowUnconditionalUpdate returns true if the object can be updated
// unconditionally (irrespective of the latest resource version), when there is
// no resource version specified in the object.
func (Strategy) AllowUnconditionalUpdate() bool {
return false
}
// WarningsOnCreate returns warnings for the creation of the given object.
func (Strategy) WarningsOnCreate(ctx context.Context, obj runtime.Object) []string {
return nil
}
// Canonicalize normalizes the object after validation.
func (Strategy) Canonicalize(obj runtime.Object) {
}
// ValidateUpdate is the default update validation for an end namespace set.
func (s Strategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
return ValidatePolicyUpdate(ctx, obj.(*authz.Policy), old.(*authz.Policy), s.platformClient)
}
// WarningsOnUpdate returns warnings for the given update.
func (Strategy) WarningsOnUpdate(ctx context.Context, obj, old runtime.Object) []string {
return nil
}