Revise Prometheus PVC Spec Syntax Error (#650)

* Revise prometheus pvc spec syntax error

* Upgrade yorkie-monitoring helm chart version

* Sync chart version with Yorkie version

* Update MAINTAINING.md version updating guide

MAINTAINING.md

@@ -7,8 +7,9 @@
 - Update `YORKIE_VERSION` in [Makefile](https://github.com/yorkie-team/yorkie/blob/main/Makefile#L1).
 - Update `version` and `appVersion` in [yorkie-cluster Helm Chart](https://github.com/yorkie-team/yorkie/blob/main/build/charts/yorkie-cluster/Chart.yaml#L16-L17).
 - If `yorkie-monitoring` or `yorkie-argocd` Helm Chart have changes, you also need to update `version` and `appVersion` for each chart.
-  - [yorkie-monitoring Helm Chart](https://github.com/yorkie-team/yorkie/blob/main/build/charts/yorkie-monitoring/Chart.yaml#L16-L17) 
-  - [yorkie-argocd Helm Chart](https://github.com/yorkie-team/yorkie/blob/main/build/charts/yorkie-argocd/Chart.yaml#L16-L17) 
+  - [yorkie-monitoring Helm Chart](https://github.com/yorkie-team/yorkie/blob/main/build/charts/yorkie-monitoring/Chart.yaml#L16-L17)
+  - [yorkie-argocd Helm Chart](https://github.com/yorkie-team/yorkie/blob/main/build/charts/yorkie-argocd/Chart.yaml#L16-L17)
+- Also, you need to update `helmChartTargetRevision` in `yorkie-argocd` Helm Chart's [values.yaml](https://github.com/yorkie-team/yorkie/blob/main/build/charts/yorkie-argocd/values.yaml#L13) 
 
 ### 2. Write changelog of this version in [CHANGELOG.md](https://github.com/yorkie-team/yorkie/blob/main/CHANGELOG.md).
 

build/charts/yorkie-monitoring/Chart.yaml

@@ -13,8 +13,8 @@ maintainers:
 
 sources:
   - https://github.com/yorkie-team/yorkie
-version: 0.4.0
-appVersion: "0.4.0"
+version: 0.4.7
+appVersion: "0.4.7"
 kubeVersion: ">=1.24.0-0"
 
 keywords:

build/charts/yorkie-monitoring/values.yaml

@@ -164,18 +164,15 @@ kube-prometheus-stack:
 
       # Prometheus StorageSpec for persistent data
       # ref: https://github.com/prometheus-operator/prometheus-operator/blob/main/Documentation/user-guides/storage.md
-      #
-      storageSpec: {}
-      # Using PersistentVolumeClaim
-      #
-      volumeClaimTemplate:
-        spec:
-          # storageClassName: gluster
-          accessModes: ["ReadWriteOnce"]
-          resources:
-            requests:
-              storage: 1Gi
-        selector: {}
+      storageSpec:
+        # Using PersistentVolumeClaim
+        volumeClaimTemplate:
+          spec:
+            # storageClassName: gluster
+            accessModes: ["ReadWriteOnce"]
+            resources:
+              requests:
+                storage: 1Gi
 
   prometheus-node-exporter:
     # fullnameOverride should be {{monitoring.name}} + "prometheus-node-exporter"