diff --git a/component/blackbox-exporter.libsonnet b/component/blackbox-exporter.libsonnet
index a4c17b5..053a558 100644
--- a/component/blackbox-exporter.libsonnet
+++ b/component/blackbox-exporter.libsonnet
@@ -126,6 +126,7 @@ local deploy = com.namespaced(
               },
             },
           ],
+          priorityClassName: 'system-cluster-critical',
           restartPolicy: 'Always',
           securityContext: {},
           serviceAccountName: sa.metadata.name,
diff --git a/component/network-canary.libsonnet b/component/network-canary.libsonnet
index fbf658d..ad2a5f1 100644
--- a/component/network-canary.libsonnet
+++ b/component/network-canary.libsonnet
@@ -60,6 +60,7 @@ local ds = kube.DaemonSet('network-canary') {
             value: '0 2147483647',
           } ],
         },
+        priorityClassName: 'system-node-critical',
         tolerations: std.objectValues(params.network_canary.tolerations),
       },
     },
diff --git a/component/scheduler-canary.jsonnet b/component/scheduler-canary.jsonnet
index 68f60c6..846398e 100644
--- a/component/scheduler-canary.jsonnet
+++ b/component/scheduler-canary.jsonnet
@@ -10,6 +10,18 @@ local inv = kap.inventory();
 local params = inv.parameters.openshift4_slos;
 
 
+local setPriorityClass = {
+  patch: |||
+    - op: add
+      path: "/spec/template/spec/priorityClassName"
+      value: "system-cluster-critical"
+  |||,
+  target: {
+    kind: 'Deployment',
+    name: 'scheduler-canary-controller-manager',
+  },
+};
+
 local kustomization =
   if params.canary_scheduler_controller.enabled then
     local image = params.images.canary_scheduler_controller;
@@ -22,7 +34,11 @@ local kustomization =
           newName: '%(registry)s/%(image)s' % image,
         },
       },
-      params.canary_scheduler_controller.kustomize_input,
+      params.canary_scheduler_controller.kustomize_input {
+        patches+: [
+          setPriorityClass,
+        ],
+      },
     )
   else {
     kustomization: { resources: [] },
diff --git a/tests/golden/defaults/openshift4-slos/openshift4-slos/20_blackbox_exporter_deploy.yaml b/tests/golden/defaults/openshift4-slos/openshift4-slos/20_blackbox_exporter_deploy.yaml
index 8b4bdb6..86db095 100644
--- a/tests/golden/defaults/openshift4-slos/openshift4-slos/20_blackbox_exporter_deploy.yaml
+++ b/tests/golden/defaults/openshift4-slos/openshift4-slos/20_blackbox_exporter_deploy.yaml
@@ -84,6 +84,7 @@ spec:
               name: config
       imagePullSecrets: []
       initContainers: []
+      priorityClassName: system-cluster-critical
       restartPolicy: Always
       securityContext: {}
       serviceAccountName: prometheus-blackbox-exporter
diff --git a/tests/golden/defaults/openshift4-slos/openshift4-slos/20_network_canary_daemonset.yaml b/tests/golden/defaults/openshift4-slos/openshift4-slos/20_network_canary_daemonset.yaml
index 2623914..5d539af 100644
--- a/tests/golden/defaults/openshift4-slos/openshift4-slos/20_network_canary_daemonset.yaml
+++ b/tests/golden/defaults/openshift4-slos/openshift4-slos/20_network_canary_daemonset.yaml
@@ -42,6 +42,7 @@ spec:
           volumeMounts: []
       imagePullSecrets: []
       initContainers: []
+      priorityClassName: system-node-critical
       terminationGracePeriodSeconds: 30
       tolerations:
         - effect: NoSchedule
diff --git a/tests/golden/defaults/openshift4-slos/openshift4-slos/scheduler-canary-deployment/apps_v1_deployment_scheduler-canary-controller-manager.yaml b/tests/golden/defaults/openshift4-slos/openshift4-slos/scheduler-canary-deployment/apps_v1_deployment_scheduler-canary-controller-manager.yaml
index f847f3e..aafdd30 100644
--- a/tests/golden/defaults/openshift4-slos/openshift4-slos/scheduler-canary-deployment/apps_v1_deployment_scheduler-canary-controller-manager.yaml
+++ b/tests/golden/defaults/openshift4-slos/openshift4-slos/scheduler-canary-deployment/apps_v1_deployment_scheduler-canary-controller-manager.yaml
@@ -81,6 +81,7 @@ spec:
           capabilities:
             drop:
             - ALL
+      priorityClassName: system-cluster-critical
       securityContext:
         runAsNonRoot: true
       serviceAccountName: scheduler-canary-controller-manager
diff --git a/tests/golden/network-only/openshift4-slos/openshift4-slos/20_network_canary_daemonset.yaml b/tests/golden/network-only/openshift4-slos/openshift4-slos/20_network_canary_daemonset.yaml
index 652da13..9fc83b0 100644
--- a/tests/golden/network-only/openshift4-slos/openshift4-slos/20_network_canary_daemonset.yaml
+++ b/tests/golden/network-only/openshift4-slos/openshift4-slos/20_network_canary_daemonset.yaml
@@ -44,6 +44,7 @@ spec:
       initContainers: []
       nodeSelector:
         node-role.kubernetes.io/worker: 'true'
+      priorityClassName: system-node-critical
       securityContext:
         sysctls:
           - name: net.ipv4.ping_group_range