Add configurable container resource requests and limits via CR spec

Container resource requirements (CPU/memory requests and limits) were
previously hardcoded inline across controller files, making it impossible
for users to tune resources for their workloads. This is particularly
important for llama-stack, where memory usage can grow unpredictably
with bring-your-own-key (BYOK) deployments.

This adds a `spec.resources` field to the OpenStackLightspeed CR that
accepts per-container `corev1.ResourceRequirements` overrides following
the same pattern used by other openstack-k8s-operators (e.g. cinder-operator).
When the field is omitted, sensible defaults matching the previous
hardcoded values are used. When set, the user's values replace the
defaults entirely.

All 7 containers are configurable: llamaStack, lightspeedService,
dataverseExporter, vectorDatabaseInit, postgres, okp, and consolePlugin.

Implementation details:
- Add ContainerResourcesSpec struct with optional per-container overrides
  to the API types
- Centralize default resource values as functions (not package-level vars)
  to prevent shared-map mutation bugs via Go's shallow copy semantics
- Add resolveResources helper that returns the user override when present,
  falling back to the default
- Update all 4 controller files (lcore, postgres, okp, console) to resolve
  resources from the CR spec
- Add unit tests for resolveResources and kuttl e2e tests for custom
  resource application across all deployments
- Update sample CR with commented-out resource override examples
- Regenerate CRD manifests and deepcopy methods

Author: omkarjoshi0304

api/v1beta1/openstacklightspeed_types.go

@@ -19,6 +19,7 @@ package v1beta1
 import (
 	"github.com/openstack-k8s-operators/lib-common/modules/common/condition"
 	"github.com/openstack-k8s-operators/lib-common/modules/common/util"
+	corev1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
@@ -91,6 +92,52 @@ type DatabaseSpec struct {
 	Class string `json:"class,omitempty"`
 }
 
+// ContainerResourcesSpec defines optional resource requirements overrides
+// for each container managed by the operator. When a field is nil, the
+// operator uses built-in defaults. When set, the provided value replaces
+// the default entirely (both requests and limits).
+type ContainerResourcesSpec struct {
+	// +kubebuilder:validation:Optional
+	// LlamaStack overrides compute resources for the llama-stack (OGX) container
+	// in the lightspeed-stack deployment.
+	// Default requests: CPU 500m, Memory 2Gi. Default limits: CPU 2, Memory 8Gi.
+	LlamaStack *corev1.ResourceRequirements `json:"llamaStack,omitempty"`
+
+	// +kubebuilder:validation:Optional
+	// LightspeedService overrides compute resources for the lightspeed-service-api
+	// container in the lightspeed-stack deployment.
+	// Default requests: CPU 250m, Memory 512Mi. Default limits: CPU 1, Memory 2Gi.
+	LightspeedService *corev1.ResourceRequirements `json:"lightspeedService,omitempty"`
+
+	// +kubebuilder:validation:Optional
+	// DataverseExporter overrides compute resources for the dataverse exporter
+	// sidecar container (only created when data collection is enabled).
+	// Default requests: CPU 50m, Memory 64Mi. Default limits: Memory 200Mi.
+	DataverseExporter *corev1.ResourceRequirements `json:"dataverseExporter,omitempty"`
+
+	// +kubebuilder:validation:Optional
+	// VectorDatabaseInit overrides compute resources for both vector-database
+	// init containers (vector-database-collect and vector-database-config-build).
+	// Default requests: CPU 100m, Memory 256Mi. Default limits: CPU 500m, Memory 1Gi.
+	VectorDatabaseInit *corev1.ResourceRequirements `json:"vectorDatabaseInit,omitempty"`
+
+	// +kubebuilder:validation:Optional
+	// Postgres overrides compute resources for the PostgreSQL container.
+	// Default requests: CPU 30m, Memory 300Mi. Default limits: CPU 500m, Memory 2Gi.
+	Postgres *corev1.ResourceRequirements `json:"postgres,omitempty"`
+
+	// +kubebuilder:validation:Optional
+	// OKP overrides compute resources for the Offline Knowledge Portal container.
+	// Default requests: CPU 500m, Memory 2Gi. Default limits: CPU 2, Memory 4Gi.
+	OKP *corev1.ResourceRequirements `json:"okp,omitempty"`
+
+	// +kubebuilder:validation:Optional
+	// ConsolePlugin overrides compute resources for the lightspeed-console-plugin
+	// container and its init container.
+	// Default requests: CPU 50m, Memory 64Mi. Default limits: CPU 200m, Memory 256Mi.
+	ConsolePlugin *corev1.ResourceRequirements `json:"consolePlugin,omitempty"`
+}
+
 // OpenStackLightspeedSpec defines the desired state of OpenStackLightspeed
 type OpenStackLightspeedSpec struct {
 	OpenStackLightspeedCore `json:",inline"`
@@ -105,6 +152,13 @@ type OpenStackLightspeedSpec struct {
 	// OKP configures the Offline Knowledge Portal (OKP) RAG source.
 	OKP *OKPSpec `json:"okp,omitempty"`
 
+	// +kubebuilder:validation:Optional
+	// Resources overrides the default compute resource requirements for
+	// individual containers managed by the operator. When omitted, sensible
+	// defaults are used. When a container's field is set, it replaces the
+	// default entirely (both requests and limits).
+	Resources *ContainerResourcesSpec `json:"resources,omitempty"`
+
 	// +kubebuilder:validation:Optional
 	// +kubebuilder:pruning:PreserveUnknownFields
 	// Dev contains developer/experimental configuration.