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