mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-03 19:58:17 +00:00
649 lines
20 KiB
Go
649 lines
20 KiB
Go
/*
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Copyright 2015 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 pod
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import (
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"strings"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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api "k8s.io/kubernetes/pkg/apis/core"
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"k8s.io/kubernetes/pkg/features"
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"k8s.io/kubernetes/pkg/security/apparmor"
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)
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// Visitor is called with each object name, and returns true if visiting should continue
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type Visitor func(name string) (shouldContinue bool)
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// VisitPodSecretNames invokes the visitor function with the name of every secret
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// referenced by the pod spec. If visitor returns false, visiting is short-circuited.
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// Transitive references (e.g. pod -> pvc -> pv -> secret) are not visited.
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// Returns true if visiting completed, false if visiting was short-circuited.
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func VisitPodSecretNames(pod *api.Pod, visitor Visitor) bool {
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for _, reference := range pod.Spec.ImagePullSecrets {
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if !visitor(reference.Name) {
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return false
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}
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}
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for i := range pod.Spec.InitContainers {
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if !visitContainerSecretNames(&pod.Spec.InitContainers[i], visitor) {
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return false
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}
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}
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for i := range pod.Spec.Containers {
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if !visitContainerSecretNames(&pod.Spec.Containers[i], visitor) {
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return false
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}
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}
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var source *api.VolumeSource
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for i := range pod.Spec.Volumes {
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source = &pod.Spec.Volumes[i].VolumeSource
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switch {
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case source.AzureFile != nil:
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if len(source.AzureFile.SecretName) > 0 && !visitor(source.AzureFile.SecretName) {
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return false
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}
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case source.CephFS != nil:
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if source.CephFS.SecretRef != nil && !visitor(source.CephFS.SecretRef.Name) {
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return false
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}
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case source.Cinder != nil:
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if source.Cinder.SecretRef != nil && !visitor(source.Cinder.SecretRef.Name) {
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return false
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}
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case source.FlexVolume != nil:
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if source.FlexVolume.SecretRef != nil && !visitor(source.FlexVolume.SecretRef.Name) {
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return false
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}
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case source.Projected != nil:
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for j := range source.Projected.Sources {
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if source.Projected.Sources[j].Secret != nil {
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if !visitor(source.Projected.Sources[j].Secret.Name) {
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return false
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}
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}
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}
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case source.RBD != nil:
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if source.RBD.SecretRef != nil && !visitor(source.RBD.SecretRef.Name) {
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return false
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}
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case source.Secret != nil:
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if !visitor(source.Secret.SecretName) {
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return false
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}
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case source.ScaleIO != nil:
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if source.ScaleIO.SecretRef != nil && !visitor(source.ScaleIO.SecretRef.Name) {
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return false
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}
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case source.ISCSI != nil:
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if source.ISCSI.SecretRef != nil && !visitor(source.ISCSI.SecretRef.Name) {
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return false
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}
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case source.StorageOS != nil:
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if source.StorageOS.SecretRef != nil && !visitor(source.StorageOS.SecretRef.Name) {
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return false
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}
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case source.CSI != nil:
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if source.CSI.NodePublishSecretRef != nil && !visitor(source.CSI.NodePublishSecretRef.Name) {
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return false
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}
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}
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}
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return true
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}
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func visitContainerSecretNames(container *api.Container, visitor Visitor) bool {
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for _, env := range container.EnvFrom {
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if env.SecretRef != nil {
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if !visitor(env.SecretRef.Name) {
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return false
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}
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}
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}
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for _, envVar := range container.Env {
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if envVar.ValueFrom != nil && envVar.ValueFrom.SecretKeyRef != nil {
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if !visitor(envVar.ValueFrom.SecretKeyRef.Name) {
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return false
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}
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}
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}
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return true
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}
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// VisitPodConfigmapNames invokes the visitor function with the name of every configmap
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// referenced by the pod spec. If visitor returns false, visiting is short-circuited.
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// Transitive references (e.g. pod -> pvc -> pv -> secret) are not visited.
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// Returns true if visiting completed, false if visiting was short-circuited.
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func VisitPodConfigmapNames(pod *api.Pod, visitor Visitor) bool {
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for i := range pod.Spec.InitContainers {
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if !visitContainerConfigmapNames(&pod.Spec.InitContainers[i], visitor) {
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return false
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}
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}
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for i := range pod.Spec.Containers {
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if !visitContainerConfigmapNames(&pod.Spec.Containers[i], visitor) {
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return false
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}
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}
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var source *api.VolumeSource
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for i := range pod.Spec.Volumes {
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source = &pod.Spec.Volumes[i].VolumeSource
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switch {
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case source.Projected != nil:
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for j := range source.Projected.Sources {
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if source.Projected.Sources[j].ConfigMap != nil {
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if !visitor(source.Projected.Sources[j].ConfigMap.Name) {
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return false
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}
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}
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}
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case source.ConfigMap != nil:
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if !visitor(source.ConfigMap.Name) {
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return false
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}
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}
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}
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return true
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}
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func visitContainerConfigmapNames(container *api.Container, visitor Visitor) bool {
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for _, env := range container.EnvFrom {
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if env.ConfigMapRef != nil {
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if !visitor(env.ConfigMapRef.Name) {
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return false
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}
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}
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}
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for _, envVar := range container.Env {
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if envVar.ValueFrom != nil && envVar.ValueFrom.ConfigMapKeyRef != nil {
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if !visitor(envVar.ValueFrom.ConfigMapKeyRef.Name) {
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return false
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}
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}
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}
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return true
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}
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// IsPodReady returns true if a pod is ready; false otherwise.
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func IsPodReady(pod *api.Pod) bool {
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return IsPodReadyConditionTrue(pod.Status)
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}
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// IsPodReadyConditionTrue returns true if a pod is ready; false otherwise.
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func IsPodReadyConditionTrue(status api.PodStatus) bool {
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condition := GetPodReadyCondition(status)
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return condition != nil && condition.Status == api.ConditionTrue
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}
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// GetPodReadyCondition extracts the pod ready condition from the given status and returns that.
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// Returns nil if the condition is not present.
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func GetPodReadyCondition(status api.PodStatus) *api.PodCondition {
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_, condition := GetPodCondition(&status, api.PodReady)
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return condition
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}
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// GetPodCondition extracts the provided condition from the given status and returns that.
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// Returns nil and -1 if the condition is not present, and the index of the located condition.
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func GetPodCondition(status *api.PodStatus, conditionType api.PodConditionType) (int, *api.PodCondition) {
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if status == nil {
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return -1, nil
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}
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for i := range status.Conditions {
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if status.Conditions[i].Type == conditionType {
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return i, &status.Conditions[i]
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}
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}
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return -1, nil
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}
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// UpdatePodCondition updates existing pod condition or creates a new one. Sets LastTransitionTime to now if the
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// status has changed.
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// Returns true if pod condition has changed or has been added.
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func UpdatePodCondition(status *api.PodStatus, condition *api.PodCondition) bool {
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condition.LastTransitionTime = metav1.Now()
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// Try to find this pod condition.
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conditionIndex, oldCondition := GetPodCondition(status, condition.Type)
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if oldCondition == nil {
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// We are adding new pod condition.
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status.Conditions = append(status.Conditions, *condition)
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return true
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}
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// We are updating an existing condition, so we need to check if it has changed.
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if condition.Status == oldCondition.Status {
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condition.LastTransitionTime = oldCondition.LastTransitionTime
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}
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isEqual := condition.Status == oldCondition.Status &&
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condition.Reason == oldCondition.Reason &&
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condition.Message == oldCondition.Message &&
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condition.LastProbeTime.Equal(&oldCondition.LastProbeTime) &&
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condition.LastTransitionTime.Equal(&oldCondition.LastTransitionTime)
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status.Conditions[conditionIndex] = *condition
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// Return true if one of the fields have changed.
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return !isEqual
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}
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// DropDisabledTemplateFields removes disabled fields from the pod template metadata and spec.
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// This should be called from PrepareForCreate/PrepareForUpdate for all resources containing a PodTemplateSpec
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func DropDisabledTemplateFields(podTemplate, oldPodTemplate *api.PodTemplateSpec) {
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var (
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podSpec *api.PodSpec
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podAnnotations map[string]string
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oldPodSpec *api.PodSpec
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oldPodAnnotations map[string]string
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)
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if podTemplate != nil {
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podSpec = &podTemplate.Spec
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podAnnotations = podTemplate.Annotations
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}
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if oldPodTemplate != nil {
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oldPodSpec = &oldPodTemplate.Spec
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oldPodAnnotations = oldPodTemplate.Annotations
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}
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dropDisabledFields(podSpec, podAnnotations, oldPodSpec, oldPodAnnotations)
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}
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// DropDisabledPodFields removes disabled fields from the pod metadata and spec.
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// This should be called from PrepareForCreate/PrepareForUpdate for all resources containing a Pod
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func DropDisabledPodFields(pod, oldPod *api.Pod) {
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var (
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podSpec *api.PodSpec
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podAnnotations map[string]string
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oldPodSpec *api.PodSpec
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oldPodAnnotations map[string]string
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)
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if pod != nil {
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podSpec = &pod.Spec
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podAnnotations = pod.Annotations
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}
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if oldPod != nil {
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oldPodSpec = &oldPod.Spec
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oldPodAnnotations = oldPod.Annotations
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}
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dropDisabledFields(podSpec, podAnnotations, oldPodSpec, oldPodAnnotations)
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}
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// dropDisabledFields removes disabled fields from the pod metadata and spec.
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func dropDisabledFields(
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podSpec *api.PodSpec, podAnnotations map[string]string,
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oldPodSpec *api.PodSpec, oldPodAnnotations map[string]string,
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) {
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// the new spec must always be non-nil
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if podSpec == nil {
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podSpec = &api.PodSpec{}
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}
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if !utilfeature.DefaultFeatureGate.Enabled(features.TokenRequestProjection) &&
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!tokenRequestProjectionInUse(oldPodSpec) {
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for i := range podSpec.Volumes {
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if podSpec.Volumes[i].Projected != nil {
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for j := range podSpec.Volumes[i].Projected.Sources {
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podSpec.Volumes[i].Projected.Sources[j].ServiceAccountToken = nil
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}
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}
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}
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}
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if !utilfeature.DefaultFeatureGate.Enabled(features.AppArmor) && !appArmorInUse(oldPodAnnotations) {
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for k := range podAnnotations {
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if strings.HasPrefix(k, apparmor.ContainerAnnotationKeyPrefix) {
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delete(podAnnotations, k)
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}
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}
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}
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if !utilfeature.DefaultFeatureGate.Enabled(features.PodShareProcessNamespace) && !shareProcessNamespaceInUse(oldPodSpec) {
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if podSpec.SecurityContext != nil {
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podSpec.SecurityContext.ShareProcessNamespace = nil
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}
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}
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if !utilfeature.DefaultFeatureGate.Enabled(features.PodPriority) && !podPriorityInUse(oldPodSpec) {
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// Set to nil pod's priority fields if the feature is disabled and the old pod
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// does not specify any values for these fields.
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podSpec.Priority = nil
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podSpec.PriorityClassName = ""
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}
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if !utilfeature.DefaultFeatureGate.Enabled(features.Sysctls) && !sysctlsInUse(oldPodSpec) {
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if podSpec.SecurityContext != nil {
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podSpec.SecurityContext.Sysctls = nil
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}
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}
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if !utilfeature.DefaultFeatureGate.Enabled(features.LocalStorageCapacityIsolation) && !emptyDirSizeLimitInUse(oldPodSpec) {
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for i := range podSpec.Volumes {
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if podSpec.Volumes[i].EmptyDir != nil {
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podSpec.Volumes[i].EmptyDir.SizeLimit = nil
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}
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}
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}
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if !utilfeature.DefaultFeatureGate.Enabled(features.VolumeSubpath) && !subpathInUse(oldPodSpec) {
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// drop subpath from the pod if the feature is disabled and the old spec did not specify subpaths
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for i := range podSpec.Containers {
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for j := range podSpec.Containers[i].VolumeMounts {
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podSpec.Containers[i].VolumeMounts[j].SubPath = ""
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}
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}
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for i := range podSpec.InitContainers {
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for j := range podSpec.InitContainers[i].VolumeMounts {
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podSpec.InitContainers[i].VolumeMounts[j].SubPath = ""
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}
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}
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}
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if (!utilfeature.DefaultFeatureGate.Enabled(features.VolumeSubpath) || !utilfeature.DefaultFeatureGate.Enabled(features.VolumeSubpathEnvExpansion)) && !subpathExprInUse(oldPodSpec) {
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// drop subpath env expansion from the pod if either of the subpath features is disabled and the old spec did not specify subpath env expansion
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for i := range podSpec.Containers {
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for j := range podSpec.Containers[i].VolumeMounts {
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podSpec.Containers[i].VolumeMounts[j].SubPathExpr = ""
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}
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}
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for i := range podSpec.InitContainers {
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for j := range podSpec.InitContainers[i].VolumeMounts {
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podSpec.InitContainers[i].VolumeMounts[j].SubPathExpr = ""
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}
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}
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}
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dropDisabledVolumeDevicesFields(podSpec, oldPodSpec)
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dropDisabledRunAsGroupField(podSpec, oldPodSpec)
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if !utilfeature.DefaultFeatureGate.Enabled(features.RuntimeClass) && !runtimeClassInUse(oldPodSpec) {
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// Set RuntimeClassName to nil only if feature is disabled and it is not used
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podSpec.RuntimeClassName = nil
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}
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dropDisabledProcMountField(podSpec, oldPodSpec)
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dropDisabledCSIVolumeSourceAlphaFields(podSpec, oldPodSpec)
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}
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// dropDisabledRunAsGroupField removes disabled fields from PodSpec related
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// to RunAsGroup
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func dropDisabledRunAsGroupField(podSpec, oldPodSpec *api.PodSpec) {
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if !utilfeature.DefaultFeatureGate.Enabled(features.RunAsGroup) && !runAsGroupInUse(oldPodSpec) {
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if podSpec.SecurityContext != nil {
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podSpec.SecurityContext.RunAsGroup = nil
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}
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for i := range podSpec.Containers {
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if podSpec.Containers[i].SecurityContext != nil {
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podSpec.Containers[i].SecurityContext.RunAsGroup = nil
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}
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}
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for i := range podSpec.InitContainers {
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if podSpec.InitContainers[i].SecurityContext != nil {
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podSpec.InitContainers[i].SecurityContext.RunAsGroup = nil
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}
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}
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}
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}
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// dropDisabledProcMountField removes disabled fields from PodSpec related
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// to ProcMount only if it is not already used by the old spec
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func dropDisabledProcMountField(podSpec, oldPodSpec *api.PodSpec) {
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if !utilfeature.DefaultFeatureGate.Enabled(features.ProcMountType) && !procMountInUse(oldPodSpec) {
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defaultProcMount := api.DefaultProcMount
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for i := range podSpec.Containers {
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if podSpec.Containers[i].SecurityContext != nil {
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podSpec.Containers[i].SecurityContext.ProcMount = &defaultProcMount
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}
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}
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for i := range podSpec.InitContainers {
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if podSpec.InitContainers[i].SecurityContext != nil {
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podSpec.InitContainers[i].SecurityContext.ProcMount = &defaultProcMount
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}
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}
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}
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}
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// dropDisabledVolumeDevicesFields removes disabled fields from []VolumeDevice if it has not been already populated.
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// This should be called from PrepareForCreate/PrepareForUpdate for all resources containing a VolumeDevice
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func dropDisabledVolumeDevicesFields(podSpec, oldPodSpec *api.PodSpec) {
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if !utilfeature.DefaultFeatureGate.Enabled(features.BlockVolume) && !volumeDevicesInUse(oldPodSpec) {
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for i := range podSpec.Containers {
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podSpec.Containers[i].VolumeDevices = nil
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}
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for i := range podSpec.InitContainers {
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podSpec.InitContainers[i].VolumeDevices = nil
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}
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}
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}
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// dropDisabledCSIVolumeSourceAlphaFields removes disabled alpha fields from []CSIVolumeSource.
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// This should be called from PrepareForCreate/PrepareForUpdate for all pod specs resources containing a CSIVolumeSource
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func dropDisabledCSIVolumeSourceAlphaFields(podSpec, oldPodSpec *api.PodSpec) {
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if !utilfeature.DefaultFeatureGate.Enabled(features.CSIInlineVolume) && !csiInUse(oldPodSpec) {
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for i := range podSpec.Volumes {
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podSpec.Volumes[i].CSI = nil
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}
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}
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}
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// subpathInUse returns true if the pod spec is non-nil and has a volume mount that makes use of the subPath feature
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func subpathInUse(podSpec *api.PodSpec) bool {
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if podSpec == nil {
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return false
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}
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for i := range podSpec.Containers {
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for j := range podSpec.Containers[i].VolumeMounts {
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if len(podSpec.Containers[i].VolumeMounts[j].SubPath) > 0 {
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return true
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}
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}
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}
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for i := range podSpec.InitContainers {
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for j := range podSpec.InitContainers[i].VolumeMounts {
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if len(podSpec.InitContainers[i].VolumeMounts[j].SubPath) > 0 {
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return true
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}
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}
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}
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return false
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}
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// runtimeClassInUse returns true if the pod spec is non-nil and has a RuntimeClassName set
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func runtimeClassInUse(podSpec *api.PodSpec) bool {
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if podSpec == nil {
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return false
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}
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if podSpec.RuntimeClassName != nil {
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return true
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}
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return false
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}
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// procMountInUse returns true if the pod spec is non-nil and has a SecurityContext's ProcMount field set
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func procMountInUse(podSpec *api.PodSpec) bool {
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if podSpec == nil {
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return false
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}
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for i := range podSpec.Containers {
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if podSpec.Containers[i].SecurityContext != nil {
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if podSpec.Containers[i].SecurityContext.ProcMount != nil {
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if *podSpec.Containers[i].SecurityContext.ProcMount != api.DefaultProcMount {
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return true
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}
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}
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}
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}
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for i := range podSpec.InitContainers {
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if podSpec.InitContainers[i].SecurityContext != nil {
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if podSpec.InitContainers[i].SecurityContext.ProcMount != nil {
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if *podSpec.InitContainers[i].SecurityContext.ProcMount != api.DefaultProcMount {
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return true
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}
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// appArmorInUse returns true if the pod has apparmor related information
|
|
func appArmorInUse(podAnnotations map[string]string) bool {
|
|
for k := range podAnnotations {
|
|
if strings.HasPrefix(k, apparmor.ContainerAnnotationKeyPrefix) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func shareProcessNamespaceInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
if podSpec.SecurityContext != nil && podSpec.SecurityContext.ShareProcessNamespace != nil {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func tokenRequestProjectionInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
for _, v := range podSpec.Volumes {
|
|
if v.Projected == nil {
|
|
continue
|
|
}
|
|
for _, s := range v.Projected.Sources {
|
|
if s.ServiceAccountToken != nil {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// podPriorityInUse returns true if the pod spec is non-nil and has Priority or PriorityClassName set.
|
|
func podPriorityInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
if podSpec.Priority != nil || podSpec.PriorityClassName != "" {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func sysctlsInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
if podSpec.SecurityContext != nil && podSpec.SecurityContext.Sysctls != nil {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// emptyDirSizeLimitInUse returns true if any pod's EptyDir volumes use SizeLimit.
|
|
func emptyDirSizeLimitInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
for i := range podSpec.Volumes {
|
|
if podSpec.Volumes[i].EmptyDir != nil {
|
|
if podSpec.Volumes[i].EmptyDir.SizeLimit != nil {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// volumeDevicesInUse returns true if the pod spec is non-nil and has VolumeDevices set.
|
|
func volumeDevicesInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
for i := range podSpec.Containers {
|
|
if podSpec.Containers[i].VolumeDevices != nil {
|
|
return true
|
|
}
|
|
}
|
|
for i := range podSpec.InitContainers {
|
|
if podSpec.InitContainers[i].VolumeDevices != nil {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// runAsGroupInUse returns true if the pod spec is non-nil and has a SecurityContext's RunAsGroup field set
|
|
func runAsGroupInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
|
|
if podSpec.SecurityContext != nil && podSpec.SecurityContext.RunAsGroup != nil {
|
|
return true
|
|
}
|
|
for i := range podSpec.Containers {
|
|
if podSpec.Containers[i].SecurityContext != nil && podSpec.Containers[i].SecurityContext.RunAsGroup != nil {
|
|
return true
|
|
}
|
|
}
|
|
for i := range podSpec.InitContainers {
|
|
if podSpec.InitContainers[i].SecurityContext != nil && podSpec.InitContainers[i].SecurityContext.RunAsGroup != nil {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// subpathExprInUse returns true if the pod spec is non-nil and has a volume mount that makes use of the subPathExpr feature
|
|
func subpathExprInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
for i := range podSpec.Containers {
|
|
for j := range podSpec.Containers[i].VolumeMounts {
|
|
if len(podSpec.Containers[i].VolumeMounts[j].SubPathExpr) > 0 {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
for i := range podSpec.InitContainers {
|
|
for j := range podSpec.InitContainers[i].VolumeMounts {
|
|
if len(podSpec.InitContainers[i].VolumeMounts[j].SubPathExpr) > 0 {
|
|
return true
|
|
}
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// csiInUse returns true if any pod's spec include inline CSI volumes.
|
|
func csiInUse(podSpec *api.PodSpec) bool {
|
|
if podSpec == nil {
|
|
return false
|
|
}
|
|
for i := range podSpec.Volumes {
|
|
if podSpec.Volumes[i].CSI != nil {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|