Add support for a per component pod status map (#50)

api/v1beta1/lokistack_types.go

@@ -361,8 +361,57 @@ const (
 	ReasonInvalidReplicationConfiguration LokiStackConditionReason = "InvalidReplicationConfiguration"
 )
 
+// PodStatusMap defines the type for mapping pod status to pod name.
+type PodStatusMap map[corev1.PodPhase][]string
+
+// LokiStackComponentStatus defines the map of per pod status per LokiStack component.
+// Each component is represented by a separate map of v1.Phase to a list of pods.
+type LokiStackComponentStatus struct {
+	// Compactor is a map to the pod status of the compactor pod.
+	//
+	// +optional
+	// +kubebuilder:validation:Optional
+	// +operator-sdk:csv:customresourcedefinitions:type=status,xDescriptors="urn:alm:descriptor:com.tectonic.ui:podStatuses",displayName="Compactor",order=5
+	Compactor PodStatusMap `json:"compactor,omitempty"`
+
+	// Distributor is a map to the per pod status of the distributor deployment
+	//
+	// +optional
+	// +kubebuilder:validation:Optional
+	// +operator-sdk:csv:customresourcedefinitions:type=status,xDescriptors="urn:alm:descriptor:com.tectonic.ui:podStatuses",displayName="Distributor",order=1
+	Distributor PodStatusMap `json:"distributor,omitempty"`
+
+	// Ingester is a map to the per pod status of the ingester statefulset
+	//
+	// +optional
+	// +kubebuilder:validation:Optional
+	// +operator-sdk:csv:customresourcedefinitions:type=status,xDescriptors="urn:alm:descriptor:com.tectonic.ui:podStatuses",displayName="Ingester",order=2
+	Ingester PodStatusMap `json:"ingester,omitempty"`
+
+	// Querier is a map to the per pod status of the querier statefulset
+	//
+	// +optional
+	// +kubebuilder:validation:Optional
+	// +operator-sdk:csv:customresourcedefinitions:type=status,xDescriptors="urn:alm:descriptor:com.tectonic.ui:podStatuses",displayName="Querier",order=3
+	Querier PodStatusMap `json:"querier,omitempty"`
+
+	// QueryFrontend is a mpa to the per pod status of the query frontend deployment.
+	//
+	// +optional
+	// +kubebuilder:validation:Optional
+	// +operator-sdk:csv:customresourcedefinitions:type=status,xDescriptors="urn:alm:descriptor:com.tectonic.ui:podStatuses",displayName="Query Frontend",order=4
+	QueryFrontend PodStatusMap `json:"queryFrontend,omitempty"`
+}
+
 // LokiStackStatus defines the observed state of LokiStack
 type LokiStackStatus struct {
+	// Components provides summary of all Loki pod status grouped
+	// per component.
+	//
+	// +optional
+	// +kubebuilder:validation:Optional
+	Components LokiStackComponentStatus `json:"components,omitempty"`
+
 	// Conditions of the Loki deployment health.
 	//
 	// +optional

api/v1beta1/zz_generated.deepcopy.go

@@ -149,6 +149,96 @@ func (in *LokiStack) DeepCopyObject() runtime.Object {
 	return nil
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in *LokiStackComponentStatus) DeepCopyInto(out *LokiStackComponentStatus) {
+	*out = *in
+	if in.Compactor != nil {
+		in, out := &in.Compactor, &out.Compactor
+		*out = make(PodStatusMap, len(*in))
+		for key, val := range *in {
+			var outVal []string
+			if val == nil {
+				(*out)[key] = nil
+			} else {
+				in, out := &val, &outVal
+				*out = make([]string, len(*in))
+				copy(*out, *in)
+			}
+			(*out)[key] = outVal
+		}
+	}
+	if in.Distributor != nil {
+		in, out := &in.Distributor, &out.Distributor
+		*out = make(PodStatusMap, len(*in))
+		for key, val := range *in {
+			var outVal []string
+			if val == nil {
+				(*out)[key] = nil
+			} else {
+				in, out := &val, &outVal
+				*out = make([]string, len(*in))
+				copy(*out, *in)
+			}
+			(*out)[key] = outVal
+		}
+	}
+	if in.Ingester != nil {
+		in, out := &in.Ingester, &out.Ingester
+		*out = make(PodStatusMap, len(*in))
+		for key, val := range *in {
+			var outVal []string
+			if val == nil {
+				(*out)[key] = nil
+			} else {
+				in, out := &val, &outVal
+				*out = make([]string, len(*in))
+				copy(*out, *in)
+			}
+			(*out)[key] = outVal
+		}
+	}
+	if in.Querier != nil {
+		in, out := &in.Querier, &out.Querier
+		*out = make(PodStatusMap, len(*in))
+		for key, val := range *in {
+			var outVal []string
+			if val == nil {
+				(*out)[key] = nil
+			} else {
+				in, out := &val, &outVal
+				*out = make([]string, len(*in))
+				copy(*out, *in)
+			}
+			(*out)[key] = outVal
+		}
+	}
+	if in.QueryFrontend != nil {
+		in, out := &in.QueryFrontend, &out.QueryFrontend
+		*out = make(PodStatusMap, len(*in))
+		for key, val := range *in {
+			var outVal []string
+			if val == nil {
+				(*out)[key] = nil
+			} else {
+				in, out := &val, &outVal
+				*out = make([]string, len(*in))
+				copy(*out, *in)
+			}
+			(*out)[key] = outVal
+		}
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new LokiStackComponentStatus.
+func (in *LokiStackComponentStatus) DeepCopy() *LokiStackComponentStatus {
+	if in == nil {
+		return nil
+	}
+	out := new(LokiStackComponentStatus)
+	in.DeepCopyInto(out)
+	return out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *LokiStackList) DeepCopyInto(out *LokiStackList) {
 	*out = *in
@@ -210,6 +300,7 @@ func (in *LokiStackSpec) DeepCopy() *LokiStackSpec {
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *LokiStackStatus) DeepCopyInto(out *LokiStackStatus) {
 	*out = *in
+	in.Components.DeepCopyInto(&out.Components)
 	if in.Conditions != nil {
 		in, out := &in.Conditions, &out.Conditions
 		*out = make([]metav1.Condition, len(*in))
@@ -300,6 +391,35 @@ func (in *ObjectStorageSpec) DeepCopy() *ObjectStorageSpec {
 	return out
 }
 
+// DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
+func (in PodStatusMap) DeepCopyInto(out *PodStatusMap) {
+	{
+		in := &in
+		*out = make(PodStatusMap, len(*in))
+		for key, val := range *in {
+			var outVal []string
+			if val == nil {
+				(*out)[key] = nil
+			} else {
+				in, out := &val, &outVal
+				*out = make([]string, len(*in))
+				copy(*out, *in)
+			}
+			(*out)[key] = outVal
+		}
+	}
+}
+
+// DeepCopy is an autogenerated deepcopy function, copying the receiver, creating a new PodStatusMap.
+func (in PodStatusMap) DeepCopy() PodStatusMap {
+	if in == nil {
+		return nil
+	}
+	out := new(PodStatusMap)
+	in.DeepCopyInto(out)
+	return *out
+}
+
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *QueryLimitSpec) DeepCopyInto(out *QueryLimitSpec) {
 	*out = *in

bundle/manifests/loki-operator.clusterserviceversion.yaml

@@ -260,6 +260,31 @@ spec:
         x-descriptors:
         - urn:alm:descriptor:com.tectonic.ui:hidden
       statusDescriptors:
+      - description: Distributor is a map to the per pod status of the distributor deployment
+        displayName: Distributor
+        path: components.distributor
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
+      - description: Ingester is a map to the per pod status of the ingester statefulset
+        displayName: Ingester
+        path: components.ingester
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
+      - description: Querier is a map to the per pod status of the querier statefulset
+        displayName: Querier
+        path: components.querier
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
+      - description: QueryFrontend is a mpa to the per pod status of the query frontend deployment.
+        displayName: Query Frontend
+        path: components.queryFrontend
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
+      - description: Compactor is a map to the pod status of the compactor pod.
+        displayName: Compactor
+        path: components.compactor
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
       - description: Conditions of the Loki deployment health.
         displayName: Conditions
         path: conditions

bundle/manifests/loki.openshift.io_lokistacks.yaml

@@ -379,6 +379,45 @@ spec:
           status:
             description: LokiStackStatus defines the observed state of LokiStack
             properties:
+              components:
+                description: Components provides summary of all Loki pod status grouped per component.
+                properties:
+                  compactor:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: Compactor is a map to the pod status of the compactor pod.
+                    type: object
+                  distributor:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: Distributor is a map to the per pod status of the distributor deployment
+                    type: object
+                  ingester:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: Ingester is a map to the per pod status of the ingester statefulset
+                    type: object
+                  querier:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: Querier is a map to the per pod status of the querier statefulset
+                    type: object
+                  queryFrontend:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: QueryFrontend is a mpa to the per pod status of the query frontend deployment.
+                    type: object
+                type: object
               conditions:
                 description: Conditions of the Loki deployment health.
                 items:

config/crd/bases/loki.openshift.io_lokistacks.yaml

@@ -531,6 +531,51 @@ spec:
           status:
             description: LokiStackStatus defines the observed state of LokiStack
             properties:
+              components:
+                description: Components provides summary of all Loki pod status grouped
+                  per component.
+                properties:
+                  compactor:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: Compactor is a map to the pod status of the compactor
+                      pod.
+                    type: object
+                  distributor:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: Distributor is a map to the per pod status of the
+                      distributor deployment
+                    type: object
+                  ingester:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: Ingester is a map to the per pod status of the ingester
+                      statefulset
+                    type: object
+                  querier:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: Querier is a map to the per pod status of the querier
+                      statefulset
+                    type: object
+                  queryFrontend:
+                    additionalProperties:
+                      items:
+                        type: string
+                      type: array
+                    description: QueryFrontend is a mpa to the per pod status of the
+                      query frontend deployment.
+                    type: object
+                type: object
               conditions:
                 description: Conditions of the Loki deployment health.
                 items:

config/manifests/bases/loki-operator.clusterserviceversion.yaml

@@ -239,6 +239,31 @@ spec:
         x-descriptors:
         - urn:alm:descriptor:com.tectonic.ui:hidden
       statusDescriptors:
+      - description: Distributor is a map to the per pod status of the distributor deployment
+        displayName: Distributor
+        path: components.distributor
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
+      - description: Ingester is a map to the per pod status of the ingester statefulset
+        displayName: Ingester
+        path: components.ingester
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
+      - description: Querier is a map to the per pod status of the querier statefulset
+        displayName: Querier
+        path: components.querier
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
+      - description: QueryFrontend is a mpa to the per pod status of the query frontend deployment.
+        displayName: Query Frontend
+        path: components.queryFrontend
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
+      - description: Compactor is a map to the pod status of the compactor pod.
+        displayName: Compactor
+        path: components.compactor
+        x-descriptors:
+        - urn:alm:descriptor:com.tectonic.ui:podStatuses
       - description: Conditions of the Loki deployment health.
         displayName: Conditions
         path: conditions

controllers/internal/status/components.go

@@ -0,0 +1,71 @@
+package status
+
+import (
+	"context"
+
+	"github.com/ViaQ/logerr/kverrors"
+	lokiv1beta1 "github.com/ViaQ/loki-operator/api/v1beta1"
+	"github.com/ViaQ/loki-operator/internal/external/k8s"
+	"github.com/ViaQ/loki-operator/internal/manifests"
+
+	corev1 "k8s.io/api/core/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	ctrl "sigs.k8s.io/controller-runtime"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+// SetComponentsStatus updates the pod status map component
+func SetComponentsStatus(ctx context.Context, k k8s.Client, req ctrl.Request) error {
+	var s lokiv1beta1.LokiStack
+	if err := k.Get(ctx, req.NamespacedName, &s); err != nil {
+		if apierrors.IsNotFound(err) {
+			return nil
+		}
+		return kverrors.Wrap(err, "failed to lookup lokistack", "name", req.NamespacedName)
+	}
+
+	var err error
+	s.Status.Components = lokiv1beta1.LokiStackComponentStatus{}
+	s.Status.Components.Compactor, err = appendPodStatus(ctx, k, manifests.LabelCompactorComponent, s.Name, s.Namespace)
+	if err != nil {
+		return kverrors.Wrap(err, "failed lookup LokiStack component pods status", "name", manifests.LabelCompactorComponent)
+	}
+
+	s.Status.Components.Querier, err = appendPodStatus(ctx, k, manifests.LabelQuerierComponent, s.Name, s.Namespace)
+	if err != nil {
+		return kverrors.Wrap(err, "failed lookup LokiStack component pods status", "name", manifests.LabelQuerierComponent)
+	}
+
+	s.Status.Components.Distributor, err = appendPodStatus(ctx, k, manifests.LabelDistributorComponent, s.Name, s.Namespace)
+	if err != nil {
+		return kverrors.Wrap(err, "failed lookup LokiStack component pods status", "name", manifests.LabelDistributorComponent)
+	}
+
+	s.Status.Components.QueryFrontend, err = appendPodStatus(ctx, k, manifests.LabelQueryFrontendComponent, s.Name, s.Namespace)
+	if err != nil {
+		return kverrors.Wrap(err, "failed lookup LokiStack component pods status", "name", manifests.LabelQueryFrontendComponent)
+	}
+
+	s.Status.Components.Ingester, err = appendPodStatus(ctx, k, manifests.LabelIngesterComponent, s.Name, s.Namespace)
+	if err != nil {
+		return kverrors.Wrap(err, "failed lookup LokiStack component pods status", "name", manifests.LabelIngesterComponent)
+	}
+	return k.Status().Update(ctx, &s, &client.UpdateOptions{})
+}
+
+func appendPodStatus(ctx context.Context, k k8s.Client, component, stack, ns string) (lokiv1beta1.PodStatusMap, error) {
+	psm := lokiv1beta1.PodStatusMap{}
+	pods := &corev1.PodList{}
+	opts := []client.ListOption{
+		client.MatchingLabels(manifests.ComponentLabels(component, stack)),
+		client.InNamespace(ns),
+	}
+	if err := k.List(ctx, pods, opts...); err != nil {
+		return nil, kverrors.Wrap(err, "failed to list pods for LokiStack component", "name", stack, "component", component)
+	}
+	for _, pod := range pods.Items {
+		phase := pod.Status.Phase
+		psm[phase] = append(psm[phase], pod.Name)
+	}
+	return psm, nil
+}

controllers/lokistack_controller.go

@@ -21,6 +21,7 @@ import (
 	"time"
 
 	"github.com/ViaQ/loki-operator/controllers/internal/management/state"
+	"github.com/ViaQ/loki-operator/controllers/internal/status"
 	"github.com/ViaQ/loki-operator/internal/external/k8s"
 	"github.com/ViaQ/loki-operator/internal/handlers"
 	"github.com/go-logr/logr"
@@ -52,8 +53,15 @@ var (
 		DeleteFunc:  func(e event.DeleteEvent) bool { return false },
 		GenericFunc: func(e event.GenericEvent) bool { return false },
 	})
-	deleteOnlyPred = builder.WithPredicates(predicate.Funcs{
-		UpdateFunc: func(e event.UpdateEvent) bool { return false },
+	updateOrDeleteOnlyPred = builder.WithPredicates(predicate.Funcs{
+		UpdateFunc: func(e event.UpdateEvent) bool {
+			switch e.ObjectOld.(type) {
+			case *appsv1.Deployment:
+			case *appsv1.StatefulSet:
+				return true
+			}
+			return false
+		},
 		CreateFunc: func(e event.CreateEvent) bool { return false },
 		DeleteFunc: func(e event.DeleteEvent) bool {
 			// DeleteStateUnknown evaluates to false only if the object
@@ -109,6 +117,14 @@ func (r *LokiStackReconciler) Reconcile(ctx context.Context, req ctrl.Request) (
 		}, err
 	}
 
+	err = status.SetComponentsStatus(ctx, r.Client, req)
+	if err != nil {
+		return ctrl.Result{
+			Requeue:      true,
+			RequeueAfter: time.Second,
+		}, err
+	}
+
 	return ctrl.Result{}, nil
 }
 
@@ -121,9 +137,9 @@ func (r *LokiStackReconciler) SetupWithManager(mgr manager.Manager) error {
 func (r *LokiStackReconciler) buildController(bld k8s.Builder) error {
 	return bld.
 		For(&lokiv1beta1.LokiStack{}, createOrUpdateOnlyPred).
-		Owns(&corev1.ConfigMap{}, deleteOnlyPred).
-		Owns(&corev1.Service{}, deleteOnlyPred).
-		Owns(&appsv1.Deployment{}, deleteOnlyPred).
-		Owns(&appsv1.StatefulSet{}, deleteOnlyPred).
+		Owns(&corev1.ConfigMap{}, updateOrDeleteOnlyPred).
+		Owns(&corev1.Service{}, updateOrDeleteOnlyPred).
+		Owns(&appsv1.Deployment{}, updateOrDeleteOnlyPred).
+		Owns(&appsv1.StatefulSet{}, updateOrDeleteOnlyPred).
 		Complete(r)
 }

controllers/lokistack_controller_test.go

@@ -65,7 +65,7 @@ func TestLokiStackController_RegistersCustomResourceForCreateOrUpdate(t *testing
 	require.Equal(t, opts[0], createOrUpdateOnlyPred)
 }
 
-func TestLokiStackController_RegisterOwnedResourcesForDeleteOnly(t *testing.T) {
+func TestLokiStackController_RegisterOwnedResourcesForUpdateOrDeleteOnly(t *testing.T) {
 	b := &k8sfakes.FakeBuilder{}
 	k := &k8sfakes.FakeClient{}
 	c := &LokiStackReconciler{Client: k, Scheme: scheme}
@@ -87,19 +87,19 @@ func TestLokiStackController_RegisterOwnedResourcesForDeleteOnly(t *testing.T) {
 	table := []test{
 		{
 			obj:  &corev1.ConfigMap{},
-			pred: deleteOnlyPred,
+			pred: updateOrDeleteOnlyPred,
 		},
 		{
 			obj:  &corev1.Service{},
-			pred: deleteOnlyPred,
+			pred: updateOrDeleteOnlyPred,
 		},
 		{
 			obj:  &appsv1.Deployment{},
-			pred: deleteOnlyPred,
+			pred: updateOrDeleteOnlyPred,
 		},
 		{
 			obj:  &appsv1.StatefulSet{},
-			pred: deleteOnlyPred,
+			pred: updateOrDeleteOnlyPred,
 		},
 	}
 	for i, tst := range table {

internal/manifests/compactor.go

@@ -107,7 +107,7 @@ func NewCompactorStatefulSet(opt Options) *appsv1.StatefulSet {
 		podSpec.NodeSelector = opt.Stack.Template.Compactor.NodeSelector
 	}
 
-	l := ComponentLabels("compactor", opt.Name)
+	l := ComponentLabels(LabelCompactorComponent, opt.Name)
 	a := commonAnnotations(opt.ConfigSHA1)
 
 	return &appsv1.StatefulSet{
@@ -116,7 +116,7 @@ func NewCompactorStatefulSet(opt Options) *appsv1.StatefulSet {
 			APIVersion: appsv1.SchemeGroupVersion.String(),
 		},
 		ObjectMeta: metav1.ObjectMeta{
-			Name:   fmt.Sprintf("loki-compactor-%s", opt.Name),
+			Name:   CompactorName(opt.Name),
 			Labels: l,
 		},
 		Spec: appsv1.StatefulSetSpec{

internal/manifests/distributor.go

@@ -121,7 +121,7 @@ func NewDistributorDeployment(opt Options) *appsv1.Deployment {
 		podSpec.NodeSelector = opt.Stack.Template.Distributor.NodeSelector
 	}
 
-	l := ComponentLabels("distributor", opt.Name)
+	l := ComponentLabels(LabelDistributorComponent, opt.Name)
 	a := commonAnnotations(opt.ConfigSHA1)
 
 	return &appsv1.Deployment{
@@ -130,7 +130,7 @@ func NewDistributorDeployment(opt Options) *appsv1.Deployment {
 			APIVersion: appsv1.SchemeGroupVersion.String(),
 		},
 		ObjectMeta: metav1.ObjectMeta{
-			Name:   fmt.Sprintf("loki-distributor-%s", opt.Name),
+			Name:   DistributorName(opt.Name),
 			Labels: l,
 		},
 		Spec: appsv1.DeploymentSpec{

internal/manifests/ingester.go

@@ -110,7 +110,7 @@ func NewIngesterStatefulSet(opt Options) *appsv1.StatefulSet {
 		podSpec.NodeSelector = opt.Stack.Template.Ingester.NodeSelector
 	}
 
-	l := ComponentLabels("ingester", opt.Name)
+	l := ComponentLabels(LabelIngesterComponent, opt.Name)
 	a := commonAnnotations(opt.ConfigSHA1)
 
 	return &appsv1.StatefulSet{
@@ -119,7 +119,7 @@ func NewIngesterStatefulSet(opt Options) *appsv1.StatefulSet {
 			APIVersion: appsv1.SchemeGroupVersion.String(),
 		},
 		ObjectMeta: metav1.ObjectMeta{
-			Name:   fmt.Sprintf("loki-ingester-%s", opt.Name),
+			Name:   IngesterName(opt.Name),
 			Labels: l,
 		},
 		Spec: appsv1.StatefulSetSpec{

internal/manifests/querier.go

@@ -110,7 +110,7 @@ func NewQuerierStatefulSet(opt Options) *appsv1.StatefulSet {
 		podSpec.NodeSelector = opt.Stack.Template.Querier.NodeSelector
 	}
 
-	l := ComponentLabels("querier", opt.Name)
+	l := ComponentLabels(LabelQuerierComponent, opt.Name)
 	a := commonAnnotations(opt.ConfigSHA1)
 
 	return &appsv1.StatefulSet{
@@ -119,7 +119,7 @@ func NewQuerierStatefulSet(opt Options) *appsv1.StatefulSet {
 			APIVersion: appsv1.SchemeGroupVersion.String(),
 		},
 		ObjectMeta: metav1.ObjectMeta{
-			Name:   fmt.Sprintf("loki-querier-%s", opt.Name),
+			Name:   QuerierName(opt.Name),
 			Labels: l,
 		},
 		Spec: appsv1.StatefulSetSpec{

internal/manifests/query-frontend.go

@@ -111,7 +111,7 @@ func NewQueryFrontendDeployment(opt Options) *appsv1.Deployment {
 		podSpec.NodeSelector = opt.Stack.Template.QueryFrontend.NodeSelector
 	}
 
-	l := ComponentLabels("query-frontend", opt.Name)
+	l := ComponentLabels(LabelQueryFrontendComponent, opt.Name)
 	a := commonAnnotations(opt.ConfigSHA1)
 
 	return &appsv1.Deployment{
@@ -120,7 +120,7 @@ func NewQueryFrontendDeployment(opt Options) *appsv1.Deployment {
 			APIVersion: appsv1.SchemeGroupVersion.String(),
 		},
 		ObjectMeta: metav1.ObjectMeta{
-			Name:   fmt.Sprintf("loki-query-frontend-%s", opt.Name),
+			Name:   QueryFrontendName(opt.Name),
 			Labels: l,
 		},
 		Spec: appsv1.DeploymentSpec{

internal/manifests/var.go

@@ -15,6 +15,19 @@ const (
 	DefaultContainerImage = "docker.io/grafana/loki:2.2.1"
 )
 
+const (
+	// LabelCompactorComponent is the label value for the compactor component
+	LabelCompactorComponent string = "compactor"
+	// LabelDistributorComponent is the label value for the distributor component
+	LabelDistributorComponent string = "distributor"
+	// LabelIngesterComponent is the label value for the ingester component
+	LabelIngesterComponent string = "ingester"
+	// LabelQuerierComponent is the label value for the querier component
+	LabelQuerierComponent string = "querier"
+	// LabelQueryFrontendComponent is the label value for the query frontend component
+	LabelQueryFrontendComponent string = "query-frontend"
+)
+
 func commonAnnotations(h string) map[string]string {
 	return map[string]string{
 		"loki.openshift.io/config-hash": h,
@@ -43,6 +56,31 @@ func GossipLabels() map[string]string {
 	}
 }
 
+// CompactorName is the name of the compactor statefulset
+func CompactorName(stackName string) string {
+	return fmt.Sprintf("loki-compactor-%s", stackName)
+}
+
+// DistributorName is the name of the distibutor deployment
+func DistributorName(stackName string) string {
+	return fmt.Sprintf("loki-distributor-%s", stackName)
+}
+
+// IngesterName is the name of the compactor statefulset
+func IngesterName(stackName string) string {
+	return fmt.Sprintf("loki-ingester-%s", stackName)
+}
+
+// QuerierName is the name of the querier statefulset
+func QuerierName(stackName string) string {
+	return fmt.Sprintf("loki-querier-%s", stackName)
+}
+
+// QueryFrontendName is the name of the query-frontend statefulset
+func QueryFrontendName(stackName string) string {
+	return fmt.Sprintf("loki-query-frontend-%s", stackName)
+}
+
 func serviceNameQuerierHTTP(stackName string) string {
 	return fmt.Sprintf("loki-querier-http-%s", stackName)
 }