monitoring: recover Pushgateway away from stale iSCSI session

services/monitoring/platform-quality-gateway-deployment.yaml

@@ -35,6 +35,9 @@ spec:
                     values:
                       - titan-04
                       - titan-07
+                      # Stale iSCSI session blocks this volume on titan-08.
+                      # Keep excluded until the host storage repair is verified.
+                      - titan-08
                       - titan-11
                       - titan-22
                       - titan-24
@@ -42,8 +45,22 @@ spec:
                     operator: In
                     values:
                       - rpi5
+                      - rpi4
                   - key: node-role.kubernetes.io/worker
                     operator: Exists
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - weight: 100
+              preference:
+                matchExpressions:
+                  - key: kubernetes.io/hostname
+                    operator: In
+                    values: [titan-18]
+            - weight: 50
+              preference:
+                matchExpressions:
+                  - key: hardware
+                    operator: In
+                    values: [rpi5]
       containers:
         - name: pushgateway
           image: prom/pushgateway:v1.11.2