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certmanager_pki.go
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certmanager_pki.go
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package certmanagerpki
import (
"context"
"fmt"
certv1 "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1"
certmeta "github.com/jetstack/cert-manager/pkg/apis/meta/v1"
"github.com/konpyutaika/nifikop/api/v1alpha1"
"github.com/konpyutaika/nifikop/pkg/errorfactory"
"github.com/konpyutaika/nifikop/pkg/resources/templates"
pkicommon "github.com/konpyutaika/nifikop/pkg/util/pki"
"go.uber.org/zap"
corev1 "k8s.io/api/core/v1"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
func (c *certManager) FinalizePKI(ctx context.Context, logger zap.Logger) error {
logger.Info("Removing cert-manager certificates and secrets",
zap.String("clusterName", c.cluster.Name))
// Safety check that we are actually doing something
if c.cluster.Spec.ListenersConfig.SSLSecrets == nil {
return nil
}
if c.cluster.Spec.ListenersConfig.SSLSecrets.Create {
// Names of our certificates and secrets
objNames := []types.NamespacedName{
{Name: c.cluster.GetNifiControllerUserIdentity(), Namespace: c.cluster.Namespace},
}
for _, node := range c.cluster.Spec.Nodes {
objNames = append(objNames, types.NamespacedName{Name: fmt.Sprintf(pkicommon.NodeServerCertTemplate, c.cluster.Name, node.Id), Namespace: c.cluster.Namespace})
}
if c.cluster.Spec.ListenersConfig.SSLSecrets.IssuerRef == nil {
objNames = append(
objNames,
types.NamespacedName{Name: fmt.Sprintf(pkicommon.NodeCACertTemplate, c.cluster.Name), Namespace: c.cluster.Namespace})
}
for _, obj := range objNames {
// Delete the certificates first so we don't accidentally recreate the
// secret after it gets deleted
cert := &certv1.Certificate{}
if err := c.client.Get(ctx, obj, cert); err != nil {
if apierrors.IsNotFound(err) {
continue
} else {
return err
}
}
if err := c.client.Delete(ctx, cert); err != nil {
return err
}
// Might as well delete the secret and leave the controller reference earlier
// as a safety belt
secret := &corev1.Secret{}
if err := c.client.Get(ctx, obj, secret); err != nil {
if apierrors.IsNotFound(err) {
continue
} else {
return err
}
}
if err := c.client.Delete(ctx, secret); err != nil {
return err
}
}
}
return nil
}
func (c *certManager) ReconcilePKI(ctx context.Context, logger zap.Logger, scheme *runtime.Scheme, externalHostnames []string) (err error) {
logger.Info("Reconciling cert-manager PKI",
zap.String("clusterName", c.cluster.Name))
resources, err := c.
nifipki(ctx, scheme, externalHostnames)
if err != nil {
return err
}
for _, o := range resources {
if err := reconcile(ctx, logger, c.client, o, c.cluster); err != nil {
return err
}
}
return nil
}
func (c *certManager) nifipki(ctx context.Context, scheme *runtime.Scheme, externalHostnames []string) ([]runtime.Object, error) {
sslConfig := c.cluster.Spec.ListenersConfig.SSLSecrets
if sslConfig.Create {
if sslConfig.IssuerRef == nil {
return fullPKI(c.cluster, scheme, externalHostnames), nil
}
return userProvidedIssuerPKI(c.cluster, externalHostnames), nil
}
return userProvidedPKI(ctx, c.client, c.cluster, scheme, externalHostnames)
}
func userProvidedIssuerPKI(cluster *v1alpha1.NifiCluster, externalHostnames []string) []runtime.Object {
// No need to generate self-signed certs and issuers because the issuer is provided by user
objects := []runtime.Object{
// Operator user
pkicommon.ControllerUserForCluster(cluster),
}
// Node "users"
for _, user := range pkicommon.NodeUsersForCluster(cluster, externalHostnames) {
objects = append(objects, user)
}
return objects
}
func fullPKI(cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme, externalHostnames []string) []runtime.Object {
var objects []runtime.Object
if cluster.Spec.ListenersConfig.SSLSecrets.ClusterScoped {
objects = append(objects, []runtime.Object{
// A self-signer for the CA Certificate
selfSignerForCluster(cluster, scheme),
// The CA Certificate
caCertForCluster(cluster, scheme),
// A cluster issuer backed by the CA certificate - so it can provision secrets
// for app in other namespaces
mainIssuerForCluster(cluster, scheme),
}...,
)
} else {
objects = append(objects, []runtime.Object{
// A self-signer for the CA Certificate
selfSignerForNamespace(cluster, scheme),
// The CA Certificate
caCertForNamespace(cluster, scheme),
// A issuer backed by the CA certificate - so it can provision secrets
// in this namespace
mainIssuerForNamespace(cluster, scheme),
}...,
)
}
objects = append(objects, pkicommon.ControllerUserForCluster(cluster))
// Node "users"
for _, user := range pkicommon.NodeUsersForCluster(cluster, externalHostnames) {
objects = append(objects, user)
}
return objects
}
func userProvidedPKI(ctx context.Context, client client.Client, cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme, externalHostnames []string) ([]runtime.Object, error) {
// If we aren't creating the secrets we need a cluster issuer made from the provided secret
caSecret, err := caSecretForProvidedCert(ctx, client, cluster, scheme)
if err != nil {
return nil, err
}
objects := []runtime.Object{
caSecret,
}
if cluster.Spec.ListenersConfig.SSLSecrets.ClusterScoped {
objects = append(objects, mainIssuerForCluster(cluster, scheme))
} else {
objects = append(objects, mainIssuerForNamespace(cluster, scheme))
}
objects = append(objects, pkicommon.ControllerUserForCluster(cluster))
// Node "users"
for _, user := range pkicommon.NodeUsersForCluster(cluster, externalHostnames) {
objects = append(objects, user)
}
return objects, nil
}
func caSecretForProvidedCert(ctx context.Context, client client.Client, cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme) (*corev1.Secret, error) {
secret := &corev1.Secret{}
err := client.Get(ctx, types.NamespacedName{Namespace: cluster.Namespace, Name: cluster.Spec.ListenersConfig.SSLSecrets.TLSSecretName}, secret)
if err != nil {
if apierrors.IsNotFound(err) {
err = errorfactory.New(errorfactory.ResourceNotReady{}, err, "could not find provided tls secret")
} else {
err = errorfactory.New(errorfactory.APIFailure{}, err, "could not lookup provided tls secret")
}
return nil, err
}
caKey := secret.Data[v1alpha1.CAPrivateKeyKey]
caCert := secret.Data[v1alpha1.CACertKey]
caSecret := &corev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf(pkicommon.NodeCACertTemplate, cluster.Name),
Namespace: cluster.Namespace,
Labels: pkicommon.LabelsForNifiPKI(cluster.Name),
},
Data: map[string][]byte{
v1alpha1.CoreCACertKey: caCert,
corev1.TLSCertKey: caCert,
corev1.TLSPrivateKeyKey: caKey,
},
}
return caSecret, nil
}
func selfSignerForCluster(cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme) *certv1.ClusterIssuer {
selfsignerMeta := templates.ObjectMeta(fmt.Sprintf(pkicommon.NodeSelfSignerTemplate, cluster.Name), pkicommon.LabelsForNifiPKI(cluster.Name), cluster)
selfsignerMeta.Namespace = metav1.NamespaceAll
selfsigner := &certv1.ClusterIssuer{
ObjectMeta: selfsignerMeta,
Spec: certv1.IssuerSpec{
IssuerConfig: certv1.IssuerConfig{
SelfSigned: &certv1.SelfSignedIssuer{},
},
},
}
controllerutil.SetControllerReference(cluster, selfsigner, scheme)
return selfsigner
}
func caCertForCluster(cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme) *certv1.Certificate {
return &certv1.Certificate{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf(pkicommon.NodeCACertTemplate, cluster.Name),
Namespace: cluster.Namespace,
Labels: pkicommon.LabelsForNifiPKI(cluster.Name),
},
Spec: certv1.CertificateSpec{
SecretName: fmt.Sprintf(pkicommon.NodeCACertTemplate, cluster.Name),
CommonName: fmt.Sprintf(pkicommon.CAFQDNTemplate,
cluster.Name, cluster.Namespace, cluster.Spec.ListenersConfig.GetClusterDomain()),
IsCA: true,
IssuerRef: certmeta.ObjectReference{
Name: fmt.Sprintf(pkicommon.NodeSelfSignerTemplate, cluster.Name),
Kind: certv1.ClusterIssuerKind,
},
},
}
}
func mainIssuerForCluster(cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme) *certv1.ClusterIssuer {
clusterIssuerMeta := templates.ObjectMeta(fmt.Sprintf(pkicommon.NodeIssuerTemplate, cluster.Name), pkicommon.LabelsForNifiPKI(cluster.Name), cluster)
clusterIssuerMeta.Namespace = metav1.NamespaceAll
issuer := &certv1.ClusterIssuer{
ObjectMeta: clusterIssuerMeta,
Spec: certv1.IssuerSpec{
IssuerConfig: certv1.IssuerConfig{
CA: &certv1.CAIssuer{
SecretName: fmt.Sprintf(pkicommon.NodeCACertTemplate, cluster.Name),
},
},
},
}
controllerutil.SetControllerReference(cluster, issuer, scheme)
return issuer
}
func selfSignerForNamespace(cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme) *certv1.Issuer {
selfsignerMeta := templates.ObjectMeta(fmt.Sprintf(pkicommon.NodeSelfSignerTemplate, cluster.Name), pkicommon.LabelsForNifiPKI(cluster.Name), cluster)
selfsignerMeta.Namespace = cluster.Namespace
selfsigner := &certv1.Issuer{
ObjectMeta: selfsignerMeta,
Spec: certv1.IssuerSpec{
IssuerConfig: certv1.IssuerConfig{
SelfSigned: &certv1.SelfSignedIssuer{},
},
},
}
controllerutil.SetControllerReference(cluster, selfsigner, scheme)
return selfsigner
}
func caCertForNamespace(cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme) *certv1.Certificate {
return &certv1.Certificate{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf(pkicommon.NodeCACertTemplate, cluster.Name),
Namespace: cluster.Namespace,
Labels: pkicommon.LabelsForNifiPKI(cluster.Name),
},
Spec: certv1.CertificateSpec{
SecretName: fmt.Sprintf(pkicommon.NodeCACertTemplate, cluster.Name),
CommonName: fmt.Sprintf(pkicommon.CAFQDNTemplate,
cluster.Name, cluster.Namespace, cluster.Spec.ListenersConfig.GetClusterDomain()),
IsCA: true,
IssuerRef: certmeta.ObjectReference{
Name: fmt.Sprintf(pkicommon.NodeSelfSignerTemplate, cluster.Name),
Kind: certv1.IssuerKind,
},
},
}
}
func mainIssuerForNamespace(cluster *v1alpha1.NifiCluster, scheme *runtime.Scheme) *certv1.Issuer {
issuerMeta := templates.ObjectMeta(fmt.Sprintf(pkicommon.NodeIssuerTemplate, cluster.Name), pkicommon.LabelsForNifiPKI(cluster.Name), cluster)
issuerMeta.Namespace = cluster.Namespace
issuer := &certv1.Issuer{
ObjectMeta: issuerMeta,
Spec: certv1.IssuerSpec{
IssuerConfig: certv1.IssuerConfig{
CA: &certv1.CAIssuer{
SecretName: fmt.Sprintf(pkicommon.NodeCACertTemplate, cluster.Name),
},
},
},
}
controllerutil.SetControllerReference(cluster, issuer, scheme)
return issuer
}