132 lines
4.2 KiB
Go
132 lines
4.2 KiB
Go
/*
|
|
Copyright 2022 DigitalOcean
|
|
|
|
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 basic
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/digitalocean/clusterlint/checks"
|
|
"github.com/digitalocean/clusterlint/kube"
|
|
v1 "k8s.io/api/core/v1"
|
|
)
|
|
|
|
func init() {
|
|
checks.Register(&webhookCheck{})
|
|
}
|
|
|
|
type webhookCheck struct{}
|
|
|
|
// Name returns a unique name for this check.
|
|
func (w *webhookCheck) Name() string {
|
|
return "admission-controller-webhook"
|
|
}
|
|
|
|
// Groups returns a list of group names this check should be part of.
|
|
func (w *webhookCheck) Groups() []string {
|
|
return []string{"basic"}
|
|
}
|
|
|
|
// Description returns a detailed human-readable description of what this check
|
|
// does.
|
|
func (w *webhookCheck) Description() string {
|
|
return "Check for admission control webhooks"
|
|
}
|
|
|
|
// Run runs this check on a set of Kubernetes objects.
|
|
func (w *webhookCheck) Run(objects *kube.Objects) ([]checks.Diagnostic, error) {
|
|
const apiserverServiceName = "kubernetes"
|
|
|
|
var diagnostics []checks.Diagnostic
|
|
|
|
for _, config := range objects.ValidatingWebhookConfigurations.Items {
|
|
for _, wh := range config.Webhooks {
|
|
if wh.ClientConfig.Service != nil {
|
|
// Ensure that the service (and its namespace) that is configure actually exists.
|
|
|
|
if !namespaceExists(objects.Namespaces, wh.ClientConfig.Service.Namespace) {
|
|
diagnostics = append(diagnostics, checks.Diagnostic{
|
|
Severity: checks.Error,
|
|
Message: fmt.Sprintf("Validating webhook %s is configured against a service in a namespace that does not exist.", wh.Name),
|
|
Kind: checks.ValidatingWebhookConfiguration,
|
|
Object: &config.ObjectMeta,
|
|
Owners: config.ObjectMeta.GetOwnerReferences(),
|
|
})
|
|
continue
|
|
}
|
|
|
|
if !serviceExists(objects.Services, wh.ClientConfig.Service.Name, wh.ClientConfig.Service.Namespace) {
|
|
diagnostics = append(diagnostics, checks.Diagnostic{
|
|
Severity: checks.Error,
|
|
Message: fmt.Sprintf("Validating webhook %s is configured against a service that does not exist.", wh.Name),
|
|
Kind: checks.ValidatingWebhookConfiguration,
|
|
Object: &config.ObjectMeta,
|
|
Owners: config.ObjectMeta.GetOwnerReferences(),
|
|
})
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
for _, config := range objects.MutatingWebhookConfigurations.Items {
|
|
for _, wh := range config.Webhooks {
|
|
if wh.ClientConfig.Service != nil {
|
|
// Ensure that the service (and its namespace) that is configure actually exists.
|
|
|
|
if !namespaceExists(objects.Namespaces, wh.ClientConfig.Service.Namespace) {
|
|
diagnostics = append(diagnostics, checks.Diagnostic{
|
|
Severity: checks.Error,
|
|
Message: fmt.Sprintf("Mutating webhook %s is configured against a service in a namespace that does not exist.", wh.Name),
|
|
Kind: checks.MutatingWebhookConfiguration,
|
|
Object: &config.ObjectMeta,
|
|
Owners: config.ObjectMeta.GetOwnerReferences(),
|
|
})
|
|
continue
|
|
}
|
|
|
|
if !serviceExists(objects.Services, wh.ClientConfig.Service.Name, wh.ClientConfig.Service.Namespace) {
|
|
diagnostics = append(diagnostics, checks.Diagnostic{
|
|
Severity: checks.Error,
|
|
Message: fmt.Sprintf("Mutating webhook %s is configured against a service that does not exist.", wh.Name),
|
|
Kind: checks.MutatingWebhookConfiguration,
|
|
Object: &config.ObjectMeta,
|
|
Owners: config.ObjectMeta.GetOwnerReferences(),
|
|
})
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return diagnostics, nil
|
|
}
|
|
|
|
func namespaceExists(namespaceList *v1.NamespaceList, namespace string) bool {
|
|
for _, ns := range namespaceList.Items {
|
|
if ns.Name == namespace {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func serviceExists(serviceList *v1.ServiceList, service, namespace string) bool {
|
|
for _, svc := range serviceList.Items {
|
|
if svc.Name == service && svc.Namespace == namespace {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|