diff --git a/charts/kube-prometheus-stack/Chart.yaml b/charts/kube-prometheus-stack/Chart.yaml
index 0048287657a3..9928c50851fd 100644
--- a/charts/kube-prometheus-stack/Chart.yaml
+++ b/charts/kube-prometheus-stack/Chart.yaml
@@ -21,7 +21,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 45.0.0
+version: 45.0.1
 appVersion: v0.63.0
 kubeVersion: ">=1.16.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus
diff --git a/charts/kube-prometheus-stack/templates/_helpers.tpl b/charts/kube-prometheus-stack/templates/_helpers.tpl
index 242a2bbe042e..9e3e4d6779e3 100644
--- a/charts/kube-prometheus-stack/templates/_helpers.tpl
+++ b/charts/kube-prometheus-stack/templates/_helpers.tpl
@@ -57,6 +57,12 @@ The longest name that gets created adds and extra 37 characters, so truncation s
 {{- printf "%s-thanos-ruler" (include "kube-prometheus-stack.fullname" .) -}}
 {{- end }}
 
+{{/* Shortened name suffixed with thanos-ruler */}}
+{{- define "kube-prometheus-stack.thanosRuler.name" -}}
+{{- default (printf "%s-thanos-ruler" (include "kube-prometheus-stack.name" .)) .Values.thanosRuler.name -}}
+{{- end }}
+
+
 {{/* Create chart name and version as used by the chart label. */}}
 {{- define "kube-prometheus-stack.chartref" -}}
 {{- replace "+" "_" .Chart.Version | printf "%s-%s" .Chart.Name -}}
@@ -106,7 +112,7 @@ heritage: {{ $.Release.Service | quote }}
 {{/* Create the name of thanosRuler service account to use */}}
 {{- define "kube-prometheus-stack.thanosRuler.serviceAccountName" -}}
 {{- if .Values.thanosRuler.serviceAccount.create -}}
-    {{ default (include "kube-prometheus-stack.thanosRuler.fullname" .) .Values.thanosRuler.serviceAccount.name }}
+    {{ default (include "kube-prometheus-stack.thanosRuler.name" .) .Values.thanosRuler.serviceAccount.name }}
 {{- else -}}
     {{ default "default" .Values.thanosRuler.serviceAccount.name }}
 {{- end -}}
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/extrasecret.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/extrasecret.yaml
index fe2ea5be6d54..587fca2dca7c 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/extrasecret.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/extrasecret.yaml
@@ -1,5 +1,5 @@
 {{- if .Values.thanosRuler.extraSecret.data -}}
-{{- $secretName := printf "thanos-ruler-%s-extra" (include "kube-prometheus-stack.fullname" . ) -}}
+{{- $secretName := printf "%s-extra" (include "kube-prometheus-stack.thanosRuler.name" . ) -}}
 apiVersion: v1
 kind: Secret
 metadata:
@@ -10,7 +10,7 @@ metadata:
 {{ toYaml .Values.thanosRuler.extraSecret.annotations | indent 4 }}
 {{- end }}
   labels:
-    app: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
+    app: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
     app.kubernetes.io/component: thanos-ruler
 {{ include "kube-prometheus-stack.labels" . | indent 4 }}
 data:
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/ingress.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/ingress.yaml
index 2760805c53ea..aed9db280f53 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/ingress.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/ingress.yaml
@@ -1,6 +1,6 @@
 {{- if and .Values.thanosRuler.enabled .Values.thanosRuler.ingress.enabled }}
 {{- $pathType := .Values.thanosRuler.ingress.pathType | default "ImplementationSpecific" }}
-{{- $serviceName := printf "%s-%s" (include "kube-prometheus-stack.fullname" .) "thanos-ruler" }}
+{{- $serviceName := include "kube-prometheus-stack.thanosRuler.name" . }}
 {{- $servicePort := .Values.thanosRuler.service.port -}}
 {{- $routePrefix := list .Values.thanosRuler.thanosRulerSpec.routePrefix }}
 {{- $paths := .Values.thanosRuler.ingress.paths | default $routePrefix -}}
@@ -16,7 +16,7 @@ metadata:
 {{ toYaml .Values.thanosRuler.ingress.annotations | indent 4 }}
 {{- end }}
   labels:
-    app: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
+    app: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
 {{- if .Values.thanosRuler.ingress.labels }}
 {{ toYaml .Values.thanosRuler.ingress.labels | indent 4 }}
 {{- end }}
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/podDisruptionBudget.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/podDisruptionBudget.yaml
index d3d378d693b6..83e54edf9b51 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/podDisruptionBudget.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/podDisruptionBudget.yaml
@@ -2,10 +2,10 @@
 apiVersion: {{ include "kube-prometheus-stack.pdb.apiVersion" . }}
 kind: PodDisruptionBudget
 metadata:
-  name: {{ template "kube-prometheus-stack.fullname" . }}-thanos-ruler
+  name: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
   namespace: {{ template "kube-prometheus-stack.namespace" . }}
   labels:
-    app: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
+    app: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
 {{ include "kube-prometheus-stack.labels" . | indent 4 }}
 spec:
   {{- if .Values.thanosRuler.podDisruptionBudget.minAvailable }}
@@ -17,5 +17,5 @@ spec:
   selector:
     matchLabels:
       app.kubernetes.io/name: thanos-ruler
-      thanos-ruler: {{ template "kube-prometheus-stack.fullname" . }}-thanos-ruler
+      thanos-ruler: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
 {{- end }}
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/ruler.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/ruler.yaml
index ebca08c4584e..cf678b5448ad 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/ruler.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/ruler.yaml
@@ -2,11 +2,11 @@
 apiVersion: monitoring.coreos.com/v1
 kind: ThanosRuler
 metadata:
-  name: {{ template "kube-prometheus-stack.fullname" . }}-thanos-ruler
+  name: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
   namespace: {{ template "kube-prometheus-stack.namespace" . }}
   labels:
-    app: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
-{{ include "kube-prometheus-stack.labels" . | indent 4 }}
+    app: {{ include "kube-prometheus-stack.thanosRuler.name" . }}
+{{- include "kube-prometheus-stack.labels" . | indent 4 -}}
 {{- if .Values.thanosRuler.annotations }}
   annotations:
 {{ toYaml .Values.thanosRuler.annotations | indent 4 }}
@@ -35,7 +35,7 @@ spec:
 {{- else if and .Values.thanosRuler.ingress.enabled .Values.thanosRuler.ingress.hosts }}
   externalPrefix: "http://{{ tpl (index .Values.thanosRuler.ingress.hosts 0) . }}{{ .Values.thanosRuler.thanosRulerSpec.routePrefix }}"
 {{- else }}
-  externalPrefix: http://{{ template "kube-prometheus-stack.fullname" . }}-thanosRuler.{{ template "kube-prometheus-stack.namespace" . }}:{{ .Values.thanosRuler.service.port }}
+  externalPrefix: http://{{ template "kube-prometheus-stack.thanosRuler.name" . }}.{{ template "kube-prometheus-stack.namespace" . }}:{{ .Values.thanosRuler.service.port }}
 {{- end }}
 {{- if .Values.thanosRuler.thanosRulerSpec.nodeSelector }}
   nodeSelector:
@@ -126,7 +126,7 @@ spec:
         labelSelector:
           matchExpressions:
             - {key: app.kubernetes.io/name, operator: In, values: [thanos-ruler]}
-            - {key: thanos-ruler, operator: In, values: [{{ template "kube-prometheus-stack.fullname" . }}-thanos-ruler]}
+            - {key: thanos-ruler, operator: In, values: [{{ template "kube-prometheus-stack.thanosRuler.name" . }}]}
 {{- else if eq .Values.thanosRuler.thanosRulerSpec.podAntiAffinity "soft" }}
     podAntiAffinity:
       preferredDuringSchedulingIgnoredDuringExecution:
@@ -136,7 +136,7 @@ spec:
           labelSelector:
             matchExpressions:
               - {key: app.kubernetes.io/name, operator: In, values: [thanos-ruler]}
-              - {key: thanos-ruler, operator: In, values: [{{ template "kube-prometheus-stack.fullname" . }}-thanos-ruler]}
+              - {key: thanos-ruler, operator: In, values: [{{ template "kube-prometheus-stack.thanosRuler.name" . }}]}
 {{- end }}
 {{- if .Values.thanosRuler.thanosRulerSpec.tolerations }}
   tolerations:
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/service.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/service.yaml
index 093dbf7cd4bf..be0c8445910d 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/service.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/service.yaml
@@ -2,12 +2,12 @@
 apiVersion: v1
 kind: Service
 metadata:
-  name: {{ template "kube-prometheus-stack.fullname" . }}-thanos-ruler
+  name: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
   namespace: {{ template "kube-prometheus-stack.namespace" . }}
   labels:
-    app: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
+    app: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
     self-monitor: {{ .Values.thanosRuler.serviceMonitor.selfMonitor | quote }}
-{{ include "kube-prometheus-stack.labels" . | indent 4 }}
+{{- include "kube-prometheus-stack.labels" . | indent 4 -}}
 {{- if .Values.thanosRuler.service.labels }}
 {{ toYaml .Values.thanosRuler.service.labels | indent 4 }}
 {{- end }}
@@ -48,6 +48,6 @@ spec:
 {{- end }}
   selector:
     app.kubernetes.io/name: thanos-ruler
-    thanos-ruler: {{ template "kube-prometheus-stack.fullname" . }}-thanos-ruler
+    thanos-ruler: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
   type: "{{ .Values.thanosRuler.service.type }}"
 {{- end }}
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/serviceaccount.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/serviceaccount.yaml
index 0138c357f533..b58f1cd4df5f 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/serviceaccount.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/serviceaccount.yaml
@@ -5,10 +5,10 @@ metadata:
   name: {{ template "kube-prometheus-stack.thanosRuler.serviceAccountName" . }}
   namespace: {{ template "kube-prometheus-stack.namespace" . }}
   labels:
-    app: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
-    app.kubernetes.io/name: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
+    app: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
+    app.kubernetes.io/name: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
     app.kubernetes.io/component: thanos-ruler
-{{ include "kube-prometheus-stack.labels" . | indent 4 }}
+{{- include "kube-prometheus-stack.labels" . | indent 4 -}}
 {{- if .Values.thanosRuler.serviceAccount.annotations }}
   annotations:
 {{ toYaml .Values.thanosRuler.serviceAccount.annotations | indent 4 }}
diff --git a/charts/kube-prometheus-stack/templates/thanos-ruler/servicemonitor.yaml b/charts/kube-prometheus-stack/templates/thanos-ruler/servicemonitor.yaml
index 7fead06c7e75..67dea7d1e67a 100644
--- a/charts/kube-prometheus-stack/templates/thanos-ruler/servicemonitor.yaml
+++ b/charts/kube-prometheus-stack/templates/thanos-ruler/servicemonitor.yaml
@@ -2,16 +2,16 @@
 apiVersion: monitoring.coreos.com/v1
 kind: ServiceMonitor
 metadata:
-  name: {{ template "kube-prometheus-stack.fullname" . }}-thanos-ruler
+  name: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
   namespace: {{ template "kube-prometheus-stack.namespace" . }}
   labels:
-    app: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
+    app: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
 {{ include "kube-prometheus-stack.labels" . | indent 4 }}
 spec:
   {{- include "servicemonitor.scrapeLimits" .Values.thanosRuler.serviceMonitor | nindent 2 }}
   selector:
     matchLabels:
-      app: {{ template "kube-prometheus-stack.name" . }}-thanos-ruler
+      app: {{ template "kube-prometheus-stack.thanosRuler.name" . }}
       release: {{ $.Release.Name | quote }}
       self-monitor: {{ .Values.thanosRuler.serviceMonitor.selfMonitor | quote }}
   namespaceSelector: