diff --git a/flux/clusters/default/kustomization.yml b/flux/clusters/default/kustomization.yml
index 44bae8b..ce1947e 100644
--- a/flux/clusters/default/kustomization.yml
+++ b/flux/clusters/default/kustomization.yml
@@ -4,4 +4,5 @@ resources:
   - ../../core/local-path-provisioner
   - ../../core/metrics-server
   - ../../core/kubelet-serving-cert-approver
+  - ../../core/monitoring-prerequisites
   - ../../components/monitoring
diff --git a/flux/clusters/ephemeral/kustomization.yml b/flux/clusters/ephemeral/kustomization.yml
index d63b551..4611c9b 100644
--- a/flux/clusters/ephemeral/kustomization.yml
+++ b/flux/clusters/ephemeral/kustomization.yml
@@ -9,6 +9,7 @@ resources:
   - ../../core/local-path-provisioner
   - ../../core/metrics-server
   - ../../core/kubelet-serving-cert-approver
+  - ../../core/monitoring-prerequisites
   - ../../components/kubevirt
   - ../../components/monitoring
   - hubble-ingress.yml
diff --git a/flux/components/monitoring/controllers/kube-prometheus-stack/release.yaml b/flux/components/monitoring/controllers/kube-prometheus-stack/release.yaml
index 352a684..9509086 100644
--- a/flux/components/monitoring/controllers/kube-prometheus-stack/release.yaml
+++ b/flux/components/monitoring/controllers/kube-prometheus-stack/release.yaml
@@ -30,8 +30,11 @@ spec:
   values:
     alertmanager:
       enabled: false
+    prometheusOperator:
+        priorityClassName: spectrum-monitoring
     prometheus:
       prometheusSpec:
+        priorityClassName: spectrum-monitoring
         retention: 168h
         resources:
           requests:
@@ -56,6 +59,7 @@ spec:
             app.kubernetes.io/part-of: spectrum-monitoring
 
     grafana:
+      priorityClassName: spectrum-monitoring
       defaultDashboardsEnabled: false
       adminPassword: fluence
       sidecar:
@@ -68,3 +72,8 @@ spec:
           provider:
             allowUiUpdates: true
             foldersFromFilesStructure: true
+
+    kube-state-metrics:
+      priorityClassName: spectrum-monitoring
+    prometheus-node-exporter:
+      priorityClassName: spectrum-monitoring
diff --git a/flux/components/monitoring/controllers/loki-stack/release.yaml b/flux/components/monitoring/controllers/loki-stack/release.yaml
index c63673e..8cfc4cc 100644
--- a/flux/components/monitoring/controllers/loki-stack/release.yaml
+++ b/flux/components/monitoring/controllers/loki-stack/release.yaml
@@ -24,9 +24,11 @@ spec:
   values:
     promtail:
       enabled: true
+      priorityClassName: spectrum-monitoring
     loki:
       enabled: true
       isDefault: false
+      priorityClassName: spectrum-monitoring
       serviceMonitor:
         enabled: true
         additionalLabels:
diff --git a/flux/core/local-path-provisioner/kustomization.yml b/flux/core/local-path-provisioner/kustomization.yml
index b632a80..9cc8343 100644
--- a/flux/core/local-path-provisioner/kustomization.yml
+++ b/flux/core/local-path-provisioner/kustomization.yml
@@ -33,3 +33,11 @@ patches:
         name: local-path-storage
         labels:
           pod-security.kubernetes.io/enforce: privileged
+  - patch: |-
+        - op: replace
+          path: /spec/template/spec/priorityClassName
+          value: system-cluster-critical
+    target:
+        kind: Deployment
+        name: local-path-provisioner
+        namespace: local-path-storage
diff --git a/flux/core/monitoring-prerequisites/kustomization.yaml b/flux/core/monitoring-prerequisites/kustomization.yaml
new file mode 100644
index 0000000..f81cecb
--- /dev/null
+++ b/flux/core/monitoring-prerequisites/kustomization.yaml
@@ -0,0 +1,4 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - ./manifests.yaml
diff --git a/flux/core/monitoring-prerequisites/manifests.yaml b/flux/core/monitoring-prerequisites/manifests.yaml
new file mode 100644
index 0000000..483c73b
--- /dev/null
+++ b/flux/core/monitoring-prerequisites/manifests.yaml
@@ -0,0 +1,9 @@
+
+---
+apiVersion: scheduling.k8s.io/v1
+kind: PriorityClass
+metadata:
+  name: spectrum-monitoring
+value: 100000
+globalDefault: false
+description: "Spectrum monitoring priority class"
diff --git a/terraform-modules/spectrum/flux.tf b/terraform-modules/spectrum/flux.tf
index a5a006d..3b7d544 100644
--- a/terraform-modules/spectrum/flux.tf
+++ b/terraform-modules/spectrum/flux.tf
@@ -21,6 +21,22 @@ resource "helm_release" "flux" {
     name  = "imageAutomationController.create"
     value = "false"
   }
+  set {
+    name  = "helmController.priorityClassName"
+    value = "system-cluster-critical"
+  }
+  set {
+    name  = "kustomizeController.priorityClassName"
+    value = "system-cluster-critical"
+  }
+  set {
+    name  = "notificationController.priorityClassName"
+    value = "system-cluster-critical"
+  }
+  set {
+    name  = "sourceController.priorityClassName"
+    value = "system-cluster-critical"
+  }
 }
 
 resource "helm_release" "flux-sync" {