forked from chaos-mesh/chaos-mesh
/
selector.go
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/
selector.go
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// Copyright 2021 Chaos Mesh Authors.
//
// 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
//
// http://www.apache.org/licenses/LICENSE-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 OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package namespace
import (
"context"
"github.com/go-logr/logr"
"github.com/pkg/errors"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/chaos-mesh/chaos-mesh/api/v1alpha1"
"github.com/chaos-mesh/chaos-mesh/pkg/selector/generic"
)
const Name = "namespace"
type namespaceSelector struct {
generic.Option
namespaces []string
}
var _ generic.Selector = &namespaceSelector{}
func (s *namespaceSelector) ListOption() client.ListOption {
if !s.ClusterScoped {
return client.InNamespace(s.TargetNamespace)
}
return nil
}
func (s *namespaceSelector) ListFunc(_ client.Reader) generic.ListFunc {
return nil
}
func (s *namespaceSelector) Match(obj client.Object) bool {
if len(s.namespaces) == 0 {
return true
}
for _, namespace := range s.namespaces {
if namespace == obj.GetNamespace() {
return true
}
}
return false
}
func New(spec v1alpha1.GenericSelectorSpec, option generic.Option) (generic.Selector, error) {
if !option.ClusterScoped {
if len(spec.Namespaces) > 1 {
return nil, errors.New("could NOT use more than 1 namespace selector within namespace scoped mode")
} else if len(spec.Namespaces) == 1 {
if spec.Namespaces[0] != option.TargetNamespace {
return nil, errors.Errorf("could NOT list pods from out of scoped namespace: %s", spec.Namespaces[0])
}
}
}
return &namespaceSelector{
Option: generic.Option{
ClusterScoped: option.ClusterScoped,
TargetNamespace: option.TargetNamespace,
EnableFilterNamespace: option.EnableFilterNamespace,
},
namespaces: spec.Namespaces,
}, nil
}
func CheckNamespace(ctx context.Context, c client.Client, namespace string, logger logr.Logger) bool {
ok, err := IsAllowedNamespaces(ctx, c, namespace)
if err != nil {
logger.Error(err, "fail to check whether this namespace is allowed", "namespace", namespace)
return false
}
if !ok {
logger.Info("namespace is not enabled for chaos-mesh", "namespace", namespace)
}
return ok
}
func IsAllowedNamespaces(ctx context.Context, c client.Client, namespace string) (bool, error) {
ns := &v1.Namespace{}
err := c.Get(ctx, types.NamespacedName{Name: namespace}, ns)
if err != nil {
return false, err
}
if ns.Annotations[generic.InjectAnnotationKey] == "enabled" {
return true, nil
}
return false, nil
}