/
242442.go
85 lines (71 loc) · 2.71 KB
/
242442.go
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// SPDX-FileCopyrightText: 2023 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package v1r11
import (
"context"
"slices"
"strings"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/labels"
"sigs.k8s.io/controller-runtime/pkg/client"
kubeutils "github.com/gardener/diki/pkg/kubernetes/utils"
"github.com/gardener/diki/pkg/rule"
sharedv1r11 "github.com/gardener/diki/pkg/shared/ruleset/disak8sstig/v1r11"
)
var _ rule.Rule = &Rule242442{}
type Rule242442 struct {
Client client.Client
Namespace string
}
func (r *Rule242442) ID() string {
return sharedv1r11.ID242442
}
func (r *Rule242442) Name() string {
return "Kubernetes must remove old components after updated versions have been installed (MEDIUM 242442)"
}
func (r *Rule242442) Run(ctx context.Context) (rule.RuleResult, error) {
images := map[string]string{}
reportedImages := map[string]struct{}{}
pods, err := kubeutils.GetPods(ctx, r.Client, r.Namespace, labels.NewSelector(), 300)
if err != nil {
return rule.SingleCheckResult(r, rule.ErroredCheckResult(err.Error(), rule.NewTarget("namespace", r.Namespace, "kind", "podList"))), nil
}
checkResults := r.checkImages(pods, images, reportedImages)
if len(checkResults) == 0 {
return rule.SingleCheckResult(r, rule.PassedCheckResult("All found images use current versions.", rule.Target{})), nil
}
return rule.RuleResult{
RuleID: r.ID(),
RuleName: r.Name(),
CheckResults: checkResults,
}, nil
}
func (*Rule242442) checkImages(pods []corev1.Pod, images map[string]string, reportedImages map[string]struct{}) []rule.CheckResult {
checkResults := []rule.CheckResult{}
for _, pod := range pods {
for _, container := range pod.Spec.Containers {
containerStatusIdx := slices.IndexFunc(pod.Status.ContainerStatuses, func(containerStatus corev1.ContainerStatus) bool {
return containerStatus.Name == container.Name
})
if containerStatusIdx < 0 {
checkResults = append(checkResults, rule.ErroredCheckResult("containerStatus not found for container", rule.NewTarget("name", pod.Name, "container", container.Name, "kind", "pod")))
continue
}
imageRef := pod.Status.ContainerStatuses[containerStatusIdx].ImageID
imageBase := strings.Split(strings.Split(imageRef, ":")[0], "@")[0]
if _, ok := images[imageBase]; ok {
if images[imageBase] != imageRef {
if _, reported := reportedImages[imageBase]; !reported {
target := rule.NewTarget("image", imageBase)
checkResults = append(checkResults, rule.FailedCheckResult("Image is used with more than one versions.", target))
reportedImages[imageBase] = struct{}{}
}
}
} else {
images[imageBase] = imageRef
}
}
}
return checkResults
}