Mark monitoring apps as critical

Signed-off-by: Marcus Noble <github@marcusnoble.co.uk>

manifests/monitoring/kube-state-metrics.yaml

@@ -201,6 +201,7 @@ spec:
       labels:
         app.kubernetes.io/name: kube-state-metrics
     spec:
+      priorityClassName: system-cluster-critical
       serviceAccountName: kube-state-metrics
       securityContext:
         fsGroup: 65534

manifests/monitoring/node-exporter.yaml

@@ -51,6 +51,7 @@ spec:
         app.kubernetes.io/name: prometheus
         app.kubernetes.io/component: node-exporter
     spec:
+      priorityClassName: system-node-critical
       serviceAccountName: prometheus-node-exporter
       containers:
         - name: prometheus-node-exporter

manifests/monitoring/promtail.yaml

@@ -212,6 +212,7 @@ spec:
         prometheus.io/port: http-metrics
         prometheus.io/scrape: "true"
     spec:
+      priorityClassName: system-node-critical
       serviceAccountName: promtail
       containers:
         - name: promtail

manifests/monitoring/vmagent.yaml

@@ -213,6 +213,7 @@ spec:
         app.kubernetes.io/name: victoria-metrics
         app.kubernetes.io/component: agent
     spec:
+      priorityClassName: system-cluster-critical
       serviceAccountName: prometheus-server
       containers:
         - name: vmagent