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package main | |
import ( | |
"bytes" | |
admissionregistrationv1 "k8s.io/api/admissionregistration/v1" | |
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | |
"k8s.io/client-go/kubernetes" | |
"os" | |
ctrl "sigs.k8s.io/controller-runtime" | |
) | |
func createMutationConfig(caCert *bytes.Buffer) { | |
var ( | |
webhookNamespace, _ = os.LookupEnv("WEBHOOK_NAMESPACE") | |
mutationCfgName, _ = os.LookupEnv("MUTATE_CONFIG") | |
// validationCfgName, _ = os.LookupEnv("VALIDATE_CONFIG") Not used here in below code | |
webhookService, _ = os.LookupEnv("WEBHOOK_SERVICE") | |
) | |
config := ctrl.GetConfigOrDie() | |
kubeClient, err := kubernetes.NewForConfig(config) | |
if err != nil { | |
panic("failed to set go -client") | |
} | |
path := "/mutate" | |
fail := admissionregistrationv1.Fail | |
mutateconfig := &admissionregistrationv1.MutatingWebhookConfiguration{ | |
ObjectMeta: metav1.ObjectMeta{ | |
Name: mutationCfgName, | |
}, | |
Webhooks: []admissionregistrationv1.MutatingWebhook{{ | |
Name: "mapplication.kb.io", | |
ClientConfig: admissionregistrationv1.WebhookClientConfig{ | |
CABundle: caCert.Bytes(), // CA bundle created earlier | |
Service: &admissionregistrationv1.ServiceReference{ | |
Name: webhookService, | |
Namespace: webhookNamespace, | |
Path: &path, | |
}, | |
}, | |
Rules: []admissionregistrationv1.RuleWithOperations{{Operations: []admissionregistrationv1.OperationType{ | |
admissionregistrationv1.Create}, | |
Rule: admissionregistrationv1.Rule{ | |
APIGroups: []string{"apps"}, | |
APIVersions: []string{"v1"}, | |
Resources: []string{"deployments"}, | |
}, | |
}}, | |
FailurePolicy: &fail, | |
}}, | |
} | |
if _, err := kubeClient.AdmissionregistrationV1().MutatingWebhookConfigurations().Create(mutateconfig) | |
err != nil { | |
panic(err) | |
} | |
} |
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