mirror of
https://github.com/ceph/ceph-csi.git
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92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
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/*
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Copyright 2021 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 policy
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import (
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"fmt"
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"strconv"
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"strings"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/pod-security-admission/api"
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)
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/*
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HostPort ports must be forbidden.
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**Restricted Fields:**
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spec.containers[*].ports[*].hostPort
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spec.initContainers[*].ports[*].hostPort
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**Allowed Values:** undefined/0
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*/
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func init() {
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addCheck(CheckHostPorts)
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}
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// CheckHostPorts returns a baseline level check
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// that forbids any host ports in 1.0+
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func CheckHostPorts() Check {
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return Check{
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ID: "hostPorts",
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Level: api.LevelBaseline,
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Versions: []VersionedCheck{
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{
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MinimumVersion: api.MajorMinorVersion(1, 0),
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CheckPod: hostPorts_1_0,
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},
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},
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}
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}
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func hostPorts_1_0(podMetadata *metav1.ObjectMeta, podSpec *corev1.PodSpec) CheckResult {
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var badContainers []string
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forbiddenHostPorts := sets.NewString()
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visitContainers(podSpec, func(container *corev1.Container) {
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valid := true
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for _, c := range container.Ports {
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if c.HostPort != 0 {
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valid = false
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forbiddenHostPorts.Insert(strconv.Itoa(int(c.HostPort)))
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}
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}
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if !valid {
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badContainers = append(badContainers, container.Name)
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}
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})
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if len(badContainers) > 0 {
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return CheckResult{
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Allowed: false,
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ForbiddenReason: "hostPort",
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ForbiddenDetail: fmt.Sprintf(
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"%s %s %s %s %s",
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pluralize("container", "containers", len(badContainers)),
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joinQuote(badContainers),
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pluralize("uses", "use", len(badContainers)),
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pluralize("hostPort", "hostPorts", len(forbiddenHostPorts)),
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strings.Join(forbiddenHostPorts.List(), ", "),
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),
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}
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}
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return CheckResult{Allowed: true}
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}
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