feat: add node affinity for DaemonSet scheduling

- Implement node affinity to prevent scheduling on vkvm-us2
- Update affinity section in daemonset.yaml
- Ensure that the DaemonSet runs only on specific nodes

This change introduces a node affinity rule to the DaemonSet configuration,
allowing it to avoid scheduling on nodes labeled with `kubernetes.io/hostname`
set to `vkvm-us2`. This helps to ensure resource allocation and performance
by restricting the DaemonSet to the desired nodes.

backups/daemonset+cronjob/daemonset.yaml

@@ -14,10 +14,15 @@ spec:
     spec:
       #nodeSelector:
       #  kubernetes.io/hostname: "vkvm-us1"
-      #affinity:
-      #  nodeAffinity:
-      #    requiredDuringSchedulingIgnoredDuringExecution:
-      #      nodeSelectorTerms:
+      affinity:
+        nodeAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            nodeSelectorTerms:
+            - matchExpressions:
+              - key: kubernetes.io/hostname
+                operator: NotIn
+                values:
+                - vkvm-us2
       #      - matchExpressions:
       #        #- key: region
       #        #  operator: NotIn