mirror of
https://github.com/clastix/kamaji.git
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136 lines
4.7 KiB
Go
136 lines
4.7 KiB
Go
// Copyright 2022 Clastix Labs
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// SPDX-License-Identifier: Apache-2.0
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package resources
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import (
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"context"
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"fmt"
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"github.com/prometheus/client_golang/prometheus"
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corev1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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kubeadmconstants "k8s.io/kubernetes/cmd/kubeadm/app/constants"
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ctrl "sigs.k8s.io/controller-runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
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"sigs.k8s.io/controller-runtime/pkg/log"
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kamajiv1alpha1 "github.com/clastix/kamaji/api/v1alpha1"
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"github.com/clastix/kamaji/internal/crypto"
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"github.com/clastix/kamaji/internal/kubeadm"
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"github.com/clastix/kamaji/internal/utilities"
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)
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type SACertificate struct {
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resource *corev1.Secret
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Client client.Client
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Name string
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TmpDirectory string
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}
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func (r *SACertificate) GetHistogram() prometheus.Histogram {
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serviceaccountcertificateCollector = LazyLoadHistogramFromResource(serviceaccountcertificateCollector, r)
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return serviceaccountcertificateCollector
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}
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func (r *SACertificate) ShouldStatusBeUpdated(_ context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) bool {
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return tenantControlPlane.Status.Certificates.SA.SecretName != r.resource.GetName() ||
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tenantControlPlane.Status.Certificates.SA.Checksum != utilities.GetObjectChecksum(r.resource)
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}
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func (r *SACertificate) ShouldCleanup(*kamajiv1alpha1.TenantControlPlane) bool {
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return false
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}
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func (r *SACertificate) CleanUp(context.Context, *kamajiv1alpha1.TenantControlPlane) (bool, error) {
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return false, nil
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}
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func (r *SACertificate) Define(_ context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) error {
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r.resource = &corev1.Secret{
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ObjectMeta: metav1.ObjectMeta{
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Name: r.getPrefixedName(tenantControlPlane),
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Namespace: tenantControlPlane.GetNamespace(),
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},
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}
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return nil
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}
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func (r *SACertificate) getPrefixedName(tenantControlPlane *kamajiv1alpha1.TenantControlPlane) string {
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return utilities.AddTenantPrefix(r.GetName(), tenantControlPlane)
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}
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func (r *SACertificate) GetClient() client.Client {
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return r.Client
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}
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func (r *SACertificate) GetTmpDirectory() string {
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return r.TmpDirectory
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}
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func (r *SACertificate) CreateOrUpdate(ctx context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) (controllerutil.OperationResult, error) {
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return utilities.CreateOrUpdateWithConflict(ctx, r.Client, r.resource, r.mutate(ctx, tenantControlPlane))
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}
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func (r *SACertificate) GetName() string {
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return "sa-certificate"
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}
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func (r *SACertificate) UpdateTenantControlPlaneStatus(_ context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) error {
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tenantControlPlane.Status.Certificates.SA.LastUpdate = metav1.Now()
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tenantControlPlane.Status.Certificates.SA.SecretName = r.resource.GetName()
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tenantControlPlane.Status.Certificates.SA.Checksum = utilities.GetObjectChecksum(r.resource)
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return nil
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}
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func (r *SACertificate) mutate(ctx context.Context, tenantControlPlane *kamajiv1alpha1.TenantControlPlane) controllerutil.MutateFn {
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return func() error {
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logger := log.FromContext(ctx, "resource", r.GetName())
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isRotationRequested := utilities.IsRotationRequested(r.resource)
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if checksum := tenantControlPlane.Status.Certificates.SA.Checksum; !isRotationRequested && (len(checksum) > 0 && checksum == utilities.GetObjectChecksum(r.resource) || len(r.resource.UID) > 0) {
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isValid, err := crypto.CheckPublicAndPrivateKeyValidity(r.resource.Data[kubeadmconstants.ServiceAccountPublicKeyName], r.resource.Data[kubeadmconstants.ServiceAccountPrivateKeyName])
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if err != nil {
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logger.Info(fmt.Sprintf("%s public_key-private_key pair is not valid: %s", kubeadmconstants.ServiceAccountKeyBaseName, err.Error()))
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}
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if isValid {
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return ctrl.SetControllerReference(tenantControlPlane, r.resource, r.Client.Scheme())
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}
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}
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config, err := getStoredKubeadmConfiguration(ctx, r.Client, r.TmpDirectory, tenantControlPlane)
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if err != nil {
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logger.Error(err, "cannot retrieve kubadm configuration")
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return err
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}
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sa, err := kubeadm.GeneratePublicKeyPrivateKeyPair(kubeadmconstants.ServiceAccountKeyBaseName, config)
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if err != nil {
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logger.Error(err, "cannot generate certificate and private key")
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return err
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}
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r.resource.Data = map[string][]byte{
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kubeadmconstants.ServiceAccountPublicKeyName: sa.PublicKey,
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kubeadmconstants.ServiceAccountPrivateKeyName: sa.PrivateKey,
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}
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r.resource.SetLabels(utilities.MergeMaps(r.resource.GetLabels(), utilities.KamajiLabels(tenantControlPlane.GetName(), r.GetName())))
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if isRotationRequested {
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utilities.SetLastRotationTimestamp(r.resource)
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}
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utilities.SetObjectChecksum(r.resource, r.resource.Data)
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return ctrl.SetControllerReference(tenantControlPlane, r.resource, r.Client.Scheme())
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}
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}
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