/
242400.go
72 lines (60 loc) · 2.53 KB
/
242400.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package v1r11
import (
"context"
"fmt"
"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 = &Rule242400{}
type Rule242400 struct {
Client client.Client
Namespace string
}
func (r *Rule242400) ID() string {
return sharedv1r11.ID242400
}
func (r *Rule242400) Name() string {
return "The Kubernetes API server must have Alpha APIs disabled (MEDIUM 242400)"
}
func (r *Rule242400) Run(ctx context.Context) (rule.RuleResult, error) {
const option = "feature-gates.AllAlpha"
var (
checkResults []rule.CheckResult
deployments = map[string]string{
"virtual-garden-kube-apiserver": "kube-apiserver",
"virtual-garden-kube-controller-manager": "kube-controller-manager",
}
)
for deploymentName, containerName := range deployments {
target := rule.NewTarget("name", deploymentName, "namespace", r.Namespace, "kind", "deployment")
fgOptions, err := kubeutils.GetCommandOptionFromDeployment(ctx, r.Client, deploymentName, containerName, r.Namespace, "feature-gates")
if err != nil {
checkResults = append(checkResults, rule.ErroredCheckResult(err.Error(), target))
continue
}
allAlphaOptions := kubeutils.FindInnerValue(fgOptions, "AllAlpha")
// featureGates.AllAlpha defaults to false. ref https://kubernetes.io/docs/reference/command-line-tools-reference/kube-apiserver/
switch {
case len(allAlphaOptions) == 0:
checkResults = append(checkResults, rule.PassedCheckResult(fmt.Sprintf("Option %s not set.", option), target))
case len(allAlphaOptions) > 1:
checkResults = append(checkResults, rule.WarningCheckResult(fmt.Sprintf("Option %s set more than once in container command.", option), target))
case allAlphaOptions[0] == "true":
checkResults = append(checkResults, rule.FailedCheckResult(fmt.Sprintf("Option %s set to not allowed value.", option), target))
case allAlphaOptions[0] == "false":
checkResults = append(checkResults, rule.PassedCheckResult(fmt.Sprintf("Option %s set to allowed value.", option), target))
default:
checkResults = append(checkResults, rule.WarningCheckResult(fmt.Sprintf("Option %s set to neither 'true' nor 'false'.", option), target))
}
}
return rule.RuleResult{
RuleID: r.ID(),
RuleName: r.Name(),
CheckResults: checkResults,
}, nil
}