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60 lines
2.3 KiB
Go
60 lines
2.3 KiB
Go
/*
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Copyright 2016 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 user
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import (
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"fmt"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/apis/extensions"
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"k8s.io/kubernetes/pkg/util/validation/field"
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)
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type nonRoot struct{}
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var _ RunAsUserStrategy = &nonRoot{}
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func NewRunAsNonRoot(options *extensions.RunAsUserStrategyOptions) (RunAsUserStrategy, error) {
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return &nonRoot{}, nil
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}
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// Generate creates the uid based on policy rules. This strategy does return a UID. It assumes
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// that the user will specify a UID or the container image specifies a UID.
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func (s *nonRoot) Generate(pod *api.Pod, container *api.Container) (*int64, error) {
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return nil, nil
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}
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// Validate ensures that the specified values fall within the range of the strategy. Validation
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// of this will pass if either the UID is not set, assuming that the image will provided the UID
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// or if the UID is set it is not root. In order to work properly this assumes that the kubelet
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// performs a final check on runAsUser or the image UID when runAsUser is nil.
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func (s *nonRoot) Validate(pod *api.Pod, container *api.Container) field.ErrorList {
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allErrs := field.ErrorList{}
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securityContextPath := field.NewPath("securityContext")
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if container.SecurityContext == nil {
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detail := fmt.Sprintf("unable to validate nil security context for container %s", container.Name)
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allErrs = append(allErrs, field.Invalid(securityContextPath, container.SecurityContext, detail))
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return allErrs
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}
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if container.SecurityContext.RunAsUser != nil && *container.SecurityContext.RunAsUser == 0 {
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detail := fmt.Sprintf("running with the root UID is forbidden by the pod security policy %s", container.Name)
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allErrs = append(allErrs, field.Invalid(securityContextPath.Child("runAsUser"), *container.SecurityContext.RunAsUser, detail))
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return allErrs
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}
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return allErrs
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}
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