/
certificate_info_controller.go
145 lines (131 loc) · 4.48 KB
/
certificate_info_controller.go
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package certificateinfo
import (
"context"
"crypto/x509"
"encoding/pem"
"reflect"
"github.com/go-logr/logr"
"github.com/grantae/certinfo"
"github.com/redhat-cop/cert-utils-operator/controllers/util"
outils "github.com/redhat-cop/operator-utils/pkg/util"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/builder"
"sigs.k8s.io/controller-runtime/pkg/event"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
const certInfoAnnotation = util.AnnotationBase + "/generate-cert-info"
const certInfo = "tls.crt.info"
const caInfo = "ca.crt.info"
// CertificateInfoReconciler reconciles a Namespace object
type CertificateInfoReconciler struct {
outils.ReconcilerBase
Log logr.Logger
controllerName string
}
// SetupWithManager sets up the controller with the Manager.
func (r *CertificateInfoReconciler) SetupWithManager(mgr ctrl.Manager) error {
r.controllerName = "certificate_info_controller"
isAnnotatedSecret := predicate.Funcs{
UpdateFunc: func(e event.UpdateEvent) bool {
oldSecret, ok := e.ObjectOld.(*corev1.Secret)
if !ok {
return false
}
newSecret, ok := e.ObjectNew.(*corev1.Secret)
if !ok {
return false
}
if newSecret.Type != util.TLSSecret {
return false
}
oldValue, _ := e.ObjectOld.GetAnnotations()[certInfoAnnotation]
newValue, _ := e.ObjectNew.GetAnnotations()[certInfoAnnotation]
old := oldValue == "true"
new := newValue == "true"
// if the content has changed we trigger is the annotation is there
if !reflect.DeepEqual(newSecret.Data[util.Cert], oldSecret.Data[util.Cert]) ||
!reflect.DeepEqual(newSecret.Data[util.CA], oldSecret.Data[util.CA]) {
return new
}
// otherwise we trigger if the annotation has changed
return old != new
},
CreateFunc: func(e event.CreateEvent) bool {
secret, ok := e.Object.(*corev1.Secret)
if !ok {
return false
}
if secret.Type != util.TLSSecret {
return false
}
value, _ := e.Object.GetAnnotations()[certInfoAnnotation]
return value == "true"
},
}
return ctrl.NewControllerManagedBy(mgr).
For(&corev1.Secret{
TypeMeta: v1.TypeMeta{
Kind: "Secret",
},
}, builder.WithPredicates(isAnnotatedSecret)).
Complete(r)
}
// +kubebuilder:rbac:groups="",resources=secrets,verbs=get;list;watch;update;patch
// +kubebuilder:rbac:groups="",resources=secrets,verbs=get;list;watch
// +kubebuilder:rbac:groups="",resources=events,verbs=get;list;watch;create;patch
func (r *CertificateInfoReconciler) Reconcile(context context.Context, req ctrl.Request) (reconcile.Result, error) {
log := r.Log.WithValues("certinfo", req.NamespacedName)
// Fetch the SecretInfo instance
instance := &corev1.Secret{}
err := r.GetClient().Get(context, req.NamespacedName, instance)
if err != nil {
if errors.IsNotFound(err) {
// Request object not found, could have been deleted after reconcile request.
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
value, _ := instance.GetAnnotations()[certInfoAnnotation]
if value == "true" {
if value, ok := instance.Data[util.Cert]; ok && len(value) != 0 {
instance.Data[certInfo] = []byte(r.generateCertInfo(instance.Data[util.Cert]))
}
if value, ok := instance.Data[util.CA]; ok && len(value) != 0 {
instance.Data[caInfo] = []byte(r.generateCertInfo(instance.Data[util.CA]))
}
} else {
delete(instance.Data, certInfo)
delete(instance.Data, caInfo)
}
err = r.GetClient().Update(context, instance)
if err != nil {
log.Error(err, "unable to update secrer", "secret", instance.GetName())
return r.ManageError(context, instance, err)
}
return r.ManageSuccess(context, instance)
}
func (r *CertificateInfoReconciler) generateCertInfo(pemCert []byte) string {
result := ""
for p, rest := pem.Decode(pemCert); p != nil; p, rest = pem.Decode(rest) {
cert, err := x509.ParseCertificate(p.Bytes)
if err != nil {
r.Log.Error(err, "unable to decode this entry, skipping", "entry", string(p.Bytes))
continue
}
// Print the certificate
res, err := certinfo.CertificateText(cert)
if err != nil {
r.Log.Error(err, "unable to describe this entry, skipping", "entry", cert)
continue
}
result += res + "\n"
}
return result
}