Merge branch...

Merge branch '1094-loki-2-4-0-panic-runtime-error-invalid-memory-address-or-nil-pointer-dereference' into 'main'

Resolve "Loki 2.4.0: panic: runtime error: invalid memory address or nil pointer dereference"

Closes #1094

See merge request stackspin/stackspin!711

flux2/apps/monitoring/kustomization.yaml

@@ -9,6 +9,10 @@ resources:
   - kube-prometheus-stack-values-configmap.yaml
   - loki-configmap.yaml
   - loki-release.yaml
+  - loki-restart-cronjob.yaml
+  - loki-restart-role.yaml
+  - loki-restart-rolebinding.yaml
+  - loki-restart-serviceaccount.yaml
   - loki-values-configmap.yaml
   - promtail-release.yaml
   - promtail-values-configmap.yaml

flux2/apps/monitoring/loki-restart-cronjob.yaml

+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: loki-restart
+  namespace: stackspin
+spec:
+  concurrencyPolicy: Forbid
+  schedule: '0 4 * * *'
+  jobTemplate:
+    spec:
+      backoffLimit: 2
+      activeDeadlineSeconds: 600
+      template:
+        spec:
+          serviceAccountName: loki-restart
+          restartPolicy: Never
+          containers:
+            - name: kubectl
+              # https://hub.docker.com/r/bitnami/kubectl
+              image: bitnami/kubectl:1.21.8
+              command:
+                - 'kubectl'
+                - 'rollout'
+                - 'restart'
+                - 'statefulset/loki'

flux2/apps/monitoring/loki-restart-role.yaml

+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: loki-restart
+  namespace: stackspin
+rules:
+  - apiGroups: ["apps", "extensions"]
+    resources: ["statefulsets"]
+    resourceNames: ["loki"]
+    verbs: ["get", "patch"]

flux2/apps/monitoring/loki-restart-rolebinding.yaml

+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: loki-restart
+  namespace: stackspin
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: loki-restart
+subjects:
+  - kind: ServiceAccount
+    name: loki-restart
+    namespace: stackspin

flux2/apps/monitoring/loki-restart-serviceaccount.yaml

+kind: ServiceAccount
+apiVersion: v1
+metadata:
+  name: loki-restart
+  namespace: stackspin

flux2/apps/monitoring/loki-values-configmap.yaml

@@ -7,11 +7,6 @@ metadata:
 data:
   values.yaml: |
     # https://github.com/grafana/helm-charts/blob/main/charts/loki/values.yaml
-    image:
-      repository: grafana/loki
-      # Downgrade loki because of mem leak
-      # (https://open.greenhost.net/stackspin/stackspin/-/issues/1077)
-      tag: 2.4.0
     resources:
       limits:
         cpu: 800m