resources.go

/*
Copyright 2021.

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 webhook

import (
	certv1 "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1"
	cmmeta "github.com/jetstack/cert-manager/pkg/apis/meta/v1"
	corev1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

func newCaddyfileConfigMap(namespace string, pod *corev1.Pod, caddyfileContents string) *corev1.ConfigMap {
	// TODO: If pod doesn't have an owner, whatdowedo
	cm := &corev1.ConfigMap{
		// TypeMeta required for server side apply
		TypeMeta: metav1.TypeMeta{
			Kind:       "ConfigMap",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Namespace:       namespace,
			Labels:          pod.GetLabels(),
			OwnerReferences: pod.GetOwnerReferences(),
		},
		Data: map[string]string{
			"Caddyfile": caddyfileContents,
		},
	}

	if len(pod.GetOwnerReferences()) > 0 {
		// Use the name of the owner to avoid creating duplicates
		cm.Name = pod.OwnerReferences[0].Name + "-caddyfile"
		return cm
	}
	if pod.GetName() != "" {
		cm.Name = pod.GetName() + "-caddyfile"
	} else if pod.GenerateName != "" {
		cm.Name = pod.GenerateName + "caddyfile"
	}
	return cm
}

func newCertificate(namespace string, pod *corev1.Pod, dnsNames []string) *certv1.Certificate {
	var name string

	if len(pod.GetOwnerReferences()) > 0 {
		// Use the name of the owner to avoid creating duplicates
		name = pod.OwnerReferences[0].Name + "-tls"
	} else {
		if pod.GetName() != "" {
			name = pod.GetName() + "-tls"
		} else if pod.GenerateName != "" {
			name = pod.GenerateName + "tls"
		}
	}

	return &certv1.Certificate{
		TypeMeta: metav1.TypeMeta{
			Kind:       "Certificate",
			APIVersion: certv1.SchemeGroupVersion.String(),
		},
		ObjectMeta: metav1.ObjectMeta{
			Name:            name,
			Namespace:       namespace,
			Labels:          pod.GetLabels(),
			OwnerReferences: pod.GetOwnerReferences(),
		},
		Spec: certv1.CertificateSpec{
			DNSNames:   dnsNames,
			SecretName: name,
			IssuerRef: cmmeta.ObjectReference{
				Name: getIssuerName(pod),
				Kind: getIssuerKind(pod),
			},
			// TODO: Allow overriding more options
			PrivateKey: &certv1.CertificatePrivateKey{
				Algorithm: certv1.ECDSAKeyAlgorithm,
				Size:      256,
			},
		},
	}
}