Introduce Monitor support for CSR resource

These changes allow the Monitor to also track CSR
(CertificateSigningResource) resources which will make
it possible to know when a certificate has been issued by
the K8s cluster signer. In turn, DCM will be able to read,
store and use that certificate to generate kubeconfigs.

Out-of-tree actions required:
- publish monitor's docker image built from this source
  onto emcov2/monitor:latest

Issue-ID: MULTICLOUD-1143
Change-Id: I7facd27bbfe08891151bb3b6a9a19948435e24e4
Signed-off-by: Igor D.C <igor.duarte.cardoso@intel.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/src/monitor/pkg/controller/resourcebundlestate/csr_predicate.go b/src/monitor/pkg/controller/resourcebundlestate/csr_predicate.go
new file mode 100644
index 00000000..cb83eec1
--- /dev/null
+++ b/src/monitor/pkg/controller/resourcebundlestate/csr_predicate.go
@@ -0,0 +1,44 @@
+package resourcebundlestate
+
+import (
+	"sigs.k8s.io/controller-runtime/pkg/event"
+)
+
+type csrPredicate struct {
+}
+
+func (p *csrPredicate) Create(evt event.CreateEvent) bool {
+
+	if evt.Meta == nil {
+		return false
+	}
+
+	labels := evt.Meta.GetLabels()
+	return checkLabel(labels)
+}
+
+func (p *csrPredicate) Delete(evt event.DeleteEvent) bool {
+
+	if evt.Meta == nil {
+		return false
+	}
+
+	labels := evt.Meta.GetLabels()
+	return checkLabel(labels)
+}
+
+func (p *csrPredicate) Update(evt event.UpdateEvent) bool {
+
+	if evt.MetaNew == nil {
+		return false
+	}
+
+	labels := evt.MetaNew.GetLabels()
+	return checkLabel(labels)
+}
+
+func (p *csrPredicate) Generic(evt event.GenericEvent) bool {
+
+	labels := evt.Meta.GetLabels()
+	return checkLabel(labels)
+}