[loki] Fix loki ruler directories mount

charts/loki/Chart.yaml

@@ -4,7 +4,7 @@ description: Helm chart for Grafana Loki supporting monolithic, simple scalable,
 type: application
 # renovate: docker=docker.io/grafana/loki
 appVersion: 3.7.1
-version: 11.4.9
+version: 11.4.10
 kubeVersion: ">=1.25.0-0"
 home: https://grafana-community.github.io/helm-charts
 sources:

charts/loki/templates/_pod.tpl

@@ -185,6 +185,8 @@ spec:
       {{- end }}
     - name: sc-rules-temp
       emptyDir: {}
+    {{- end }}
+    {{- if has $target (list "ruler" "backend" "single-binary") }}
     {{- range $dir, $_ := .Values.ruler.directories }}
     - name: {{ include "loki.rulerRulesDirName" $dir }}
       configMap:
@@ -270,6 +272,8 @@ spec:
         {{- if and $component.sidecar .Values.sidecar.rules.enabled }}
         - name: sc-rules-volume
           mountPath: {{ .Values.sidecar.rules.folder | quote }}
+        {{- end }}
+        {{- if has $target (list "ruler" "backend" "single-binary") }}
           {{- range $dir, $_ := .Values.ruler.directories }}
         - name: {{ include "loki.rulerRulesDirName" $dir }}
           mountPath: /etc/loki/rules/{{ $dir }}

charts/loki/tests/ruler/sidecar_test.yaml

@@ -222,6 +222,43 @@ tests:
             name: rules-tenant-foo
             mountPath: /etc/loki/rules/Tenant_Foo-
 
+  - it: should render configmap-backed rule volumes and mounts for ruler directories without the rules sidecar
+    set:
+      sidecar.rules.enabled: false
+      loki.rulerConfig.storage.type: local
+      ruler:
+        directories:
+          fake:
+            alerts.yaml: |
+              groups:
+    asserts:
+      - template: ruler/statefulset.yaml
+        hasDocuments:
+          count: 1
+      - template: ruler/statefulset.yaml
+        contains:
+          path: spec.template.spec.volumes
+          content:
+            name: rules-fake
+            configMap:
+              name: RELEASE-NAME-loki-ruler-rules-fake
+      - template: ruler/statefulset.yaml
+        contains:
+          path: spec.template.spec.containers[0].volumeMounts
+          content:
+            name: rules-fake
+            mountPath: /etc/loki/rules/fake
+      - template: ruler/statefulset.yaml
+        notContains:
+          path: spec.template.spec.containers
+          content:
+            name: loki-sc-rules
+      - template: ruler/statefulset.yaml
+        notContains:
+          path: spec.template.spec.volumes
+          content:
+            name: sc-rules-volume
+
   - it: should not add the sidecar container or shared volume when disabled via sidecar.rules.enabled
     set:
       sidecar.rules.enabled: false