Commit status notifications: Add optional prefix to commit status key

api/v1beta1/provider_types.go

@@ -32,6 +32,14 @@ type ProviderSpec struct {
 	// +required
 	Type string `json:"type"`
 
+	// A string to prepend to the identifier of a commit status.
+	// Example use-case: a single object (kustomization/k8s-gitops)
+	// is deployed to multiple clusters. Specifying this (e.g., to
+	// the name of the cluster) ensures that the notification controllers
+	// on each cluster don't overwrite each others' commit statuses.
+	// +optional
+	CommitStatusPrefix string `json:"commitStatusPrefix,omitempty"`
+
 	// Alert channel for this provider
 	// +optional
 	Channel string `json:"channel,omitempty"`

config/crd/bases/notification.toolkit.fluxcd.io_providers.yaml

@@ -63,6 +63,13 @@ spec:
               channel:
                 description: Alert channel for this provider
                 type: string
+              commitStatusPrefix:
+                description: 'A string to prepend to the identifier of a commit status.
+                  Example use-case: a single object (kustomization/k8s-gitops) is
+                  deployed to multiple clusters. Specifying this (e.g., to the name
+                  of the cluster) ensures that the notification controllers on each
+                  cluster don''t overwrite each others'' commit statuses.'
+                type: string
               proxy:
                 description: HTTP/S address of the proxy
                 pattern: ^(http|https)://

docs/api/notification.md

@@ -237,6 +237,22 @@ string
 </tr>
 <tr>
 <td>
+<code>commitStatusPrefix</code><br>
+<em>
+string
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>A string to prepend to the identifier of a commit status.
+Example use-case: a single object (kustomization/k8s-gitops)
+is deployed to multiple clusters. Specifying this (e.g., to
+the name of the cluster) ensures that the notification controllers
+on each cluster don&rsquo;t overwrite each others&rsquo; commit statuses.</p>
+</td>
+</tr>
+<tr>
+<td>
 <code>channel</code><br>
 <em>
 string
@@ -742,6 +758,22 @@ string
 </tr>
 <tr>
 <td>
+<code>commitStatusPrefix</code><br>
+<em>
+string
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>A string to prepend to the identifier of a commit status.
+Example use-case: a single object (kustomization/k8s-gitops)
+is deployed to multiple clusters. Specifying this (e.g., to
+the name of the cluster) ensures that the notification controllers
+on each cluster don&rsquo;t overwrite each others&rsquo; commit statuses.</p>
+</td>
+</tr>
+<tr>
+<td>
 <code>channel</code><br>
 <em>
 string

internal/notifier/util.go

@@ -46,7 +46,16 @@ func parseGitAddress(s string) (string, string, error) {
 }
 
 func formatNameAndDescription(event events.Event) (string, string) {
-	name := fmt.Sprintf("%v/%v", event.InvolvedObject.Kind, event.InvolvedObject.Name)
+	kind, name := event.InvolvedObject.Kind, event.InvolvedObject.Name
+	commitStatusPrefix, ok := event.Metadata["commitStatusPrefix"]
+	if ok && commitStatusPrefix != "" {
+		// This adds additional information to the identifier of a commit status so that,
+		// for example, notification controllers deployed on multiple clusters hosting
+		// the same resource kind/name don't overwrite each others' commit statuses.
+		name = fmt.Sprintf("%v/%v/%v", commitStatusPrefix, kind, name)
+	} else {
+		name = fmt.Sprintf("%v/%v", kind, name)
+	}
 	name = strings.ToLower(name)
 	desc := strings.Join(splitCamelcase(event.Reason), " ")
 	desc = strings.ToLower(desc)

internal/notifier/util_test.go

@@ -25,16 +25,33 @@ import (
 )
 
 func TestUtil_NameAndDescription(t *testing.T) {
-	event := events.Event{
+	var event events.Event
+	var name, desc string
+
+	event = events.Event{
 		InvolvedObject: v1.ObjectReference{
 			Kind: "Kustomization",
 			Name: "gitops-system",
 		},
 		Reason: "ApplySucceeded",
 	}
-	name, desc := formatNameAndDescription(event)
+	name, desc = formatNameAndDescription(event)
 	require.Equal(t, "kustomization/gitops-system", name)
 	require.Equal(t, "apply succeeded", desc)
+
+	event = events.Event{
+		InvolvedObject: v1.ObjectReference{
+			Kind: "Kustomization",
+			Name: "gitops-system",
+		},
+		Reason: "ApplySucceeded",
+		Metadata: map[string]string{
+			"commitStatusPrefix": "im-a-cluster",
+		},
+	}
+	name, desc = formatNameAndDescription(event)
+	require.Equal(t, "im-a-cluster/kustomization/gitops-system", name)
+	require.Equal(t, "apply succeeded", desc)
 }
 
 func TestUtil_ParseRevision(t *testing.T) {

internal/server/event_handlers.go

@@ -259,6 +259,16 @@ func (s *EventServer) handleEvent() func(w http.ResponseWriter, r *http.Request)
 				}
 			}
 
+			if provider.Spec.CommitStatusPrefix != "" {
+				if notification.Metadata == nil {
+					notification.Metadata = map[string]string{
+						"commitStatusPrefix": provider.Spec.CommitStatusPrefix,
+					}
+				} else {
+					notification.Metadata["commitStatusPrefix"] = provider.Spec.CommitStatusPrefix
+				}
+			}
+
 			go func(n notifier.Interface, e events.Event) {
 				if err := n.Post(e); err != nil {
 					err = redactTokenFromError(err, token)