bugfix/monitoring add nil checker (#587)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Version Update**
  - Monitoring application version updated from 1.6.1 to 1.6.2
- **Configuration Improvements**
  - Enhanced resource configuration checks for VM cluster components
- Improved handling of resource definitions to prevent potential errors

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/extra/monitoring/Chart.yaml

@@ -3,4 +3,4 @@ name: monitoring
 description: Monitoring and observability stack
 icon: /logos/monitoring.svg
 type: application
-version: 1.6.1
+version: 1.6.2

packages/extra/monitoring/templates/vm/vmcluster.yaml

@@ -10,26 +10,26 @@ spec:
   vminsert:
     replicaCount: 2
     resources:
-      {{- if empty .vminsert.resources }}
+      {{- if and (hasKey . "vminsert") (hasKey .vminsert "resources") }}
+      {{- toYaml .vminsert.resources | nindent 6 }}
+      {{- else }}
       limits:
         memory: 1000Mi
       requests:
         cpu: 100m
         memory: 500Mi
-      {{- else }}
-      {{- toYaml .vminsert.resources | nindent 6 }}
       {{- end }}
   vmselect:
     replicaCount: 2
     resources:
-      {{- if empty .vmselect.resources }}
+      {{- if and (hasKey . "vmselect") (hasKey .vmselect "resources") }}
+      {{- toYaml .vmselect.resources | nindent 6 }}
+      {{- else }}
       limits:
         memory: 1000Mi
       requests:
         cpu: 100m
         memory: 500Mi
-      {{- else }}
-      {{- toYaml .vmselect.resources | nindent 6 }}
       {{- end }}
     extraArgs:
       search.maxUniqueTimeseries: "600000"
@@ -48,14 +48,14 @@ spec:
   vmstorage:
     replicaCount: 2
     resources:
-      {{- if empty .vmstorage.resources }}
+      {{- if and (hasKey . "vmstorage") (hasKey .vmstorage "resources") }}
+      {{- toYaml .vmstorage.resources | nindent 6 }}
+      {{- else }}
       limits:
         memory: 2048Mi
       requests:
         cpu: 100m
         memory: 500Mi
-      {{- else }}
-      {{- toYaml .vmstorage.resources | nindent 6 }}
       {{- end }}
     storage:
       volumeClaimTemplate:

packages/extra/versions_map

@@ -22,7 +22,8 @@ monitoring 1.5.2 898374b5
 monitoring 1.5.3 c1ca19dc
 monitoring 1.5.4 d4634797
 monitoring 1.6.0 cb7b8158
-monitoring 1.6.1 HEAD
+monitoring 1.6.1 3bb97596
+monitoring 1.6.2 HEAD
 seaweedfs 0.1.0 5ca8823
 seaweedfs 0.2.0 9e33dc0
 seaweedfs 0.2.1 249bf35