54 lines
1.8 KiB
Go
54 lines
1.8 KiB
Go
//go:build !windows
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// +build !windows
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/*
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Copyright 2020 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 kuberuntime
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import (
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"fmt"
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"k8s.io/api/core/v1"
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"k8s.io/kubernetes/pkg/kubelet/util/format"
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"k8s.io/kubernetes/pkg/securitycontext"
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)
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// verifyRunAsNonRoot verifies RunAsNonRoot.
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func verifyRunAsNonRoot(pod *v1.Pod, container *v1.Container, uid *int64, username string) error {
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effectiveSc := securitycontext.DetermineEffectiveSecurityContext(pod, container)
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// If the option is not set, or if running as root is allowed, return nil.
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if effectiveSc == nil || effectiveSc.RunAsNonRoot == nil || !*effectiveSc.RunAsNonRoot {
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return nil
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}
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if effectiveSc.RunAsUser != nil {
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if *effectiveSc.RunAsUser == 0 {
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return fmt.Errorf("container's runAsUser breaks non-root policy (pod: %q, container: %s)", format.Pod(pod), container.Name)
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}
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return nil
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}
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switch {
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case uid != nil && *uid == 0:
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return fmt.Errorf("container has runAsNonRoot and image will run as root (pod: %q, container: %s)", format.Pod(pod), container.Name)
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case uid == nil && len(username) > 0:
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return fmt.Errorf("container has runAsNonRoot and image has non-numeric user (%s), cannot verify user is non-root (pod: %q, container: %s)", username, format.Pod(pod), container.Name)
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default:
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return nil
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}
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}
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