fix release notes

Author: nammn

changelog/20250806_breaking_changing_container_setup_of_static_architecture.md

@@ -4,5 +4,5 @@ kind: breaking
 date: 2025-08-06
 ---
 
-This change fixes the current complex and difficult-to-maintain architecture for stateful set containers, which relies on an "agent matrix" to map operator and agent versions which led to a sheer amount of images.
-We solve this by shifting to a 3-container setup. This new design eliminates the need for the operator-version/agent-version matrix by adding one additional container containing all required binaries. This architecture maps to what we already do with the mongodb-database container.
+* This change fixes the current complex and difficult-to-maintain architecture for stateful set containers, which relies on an "agent matrix" to map operator and agent versions which led to a sheer amount of images.
+* We solve this by shifting to a 3-container setup. This new design eliminates the need for the operator-version/agent-version matrix by adding one additional container containing all required binaries. This architecture maps to what we already do with the mongodb-database container.

controllers/operator/construct/database_construction.go

@@ -494,9 +494,13 @@ func buildDatabaseStatefulSetConfigurationFunction(mdb databaseStatefulSetSource
 		shareProcessNs = func(sts *appsv1.StatefulSet) {
 			sts.Spec.Template.Spec.ShareProcessNamespace = ptr.To(true)
 		}
-		staticMods = append(staticMods, podtemplatespec.WithContainerByIndex(0, container.WithVolumeMounts(volumeMounts)))
-		staticMods = append(staticMods, podtemplatespec.WithContainerByIndex(1, container.WithVolumeMounts(volumeMounts)))
-		staticMods = append(staticMods, podtemplatespec.WithContainerByIndex(2, container.WithVolumeMounts(volumeMounts)))
+		// Add volume mounts to all containers in static architecture
+		// This runs after all containers have been added to the spec
+		staticMods = append(staticMods, func(spec *corev1.PodTemplateSpec) {
+			for i := range spec.Spec.Containers {
+				container.WithVolumeMounts(volumeMounts)(&spec.Spec.Containers[i])
+			}
+		})
 		databaseImage = opts.AgentImage
 	} else {
 		databaseImage = opts.DatabaseNonStaticImage