Merge pull request #30 from Raj-Adarsh/a4_helm_v3

chore: added notes.txt for postgres

postgres/templates/NOTES.txt

@@ -0,0 +1,62 @@
+#########################################################
+# Postgres Helm Chart
+#########################################################
+
+1. **Release Information**
+   - Release Name: {{ .Release.Name }}
+   - Namespace: {{ .Release.Namespace }}
+   - Chart Version: {{ .Chart.Version }}
+   - App Version: {{ .Chart.AppVersion }}
+
+2. **Service Information**
+   - Postgres Service: `postgres-svc`
+   - Port: `5432`
+
+3. **Accessing the Database**
+   - To connect to the PostgreSQL database, you can use the following command:
+     ```
+     kubectl run -it --rm --image=postgres:14 --restart=Never pg-client -- psql -h postgres-svc -U {{ .Values.postgresql.username }} -d {{ .Values.postgresql.database }}
+     ```
+   - Replace `{{ .Values.postgresql.username }}` and `{{ .Values.postgresql.database }}` with the actual values from your `values.yaml`.
+
+4. **Credentials**
+   - The PostgreSQL credentials are stored in the `postgres-credentials` secret.
+   - You can retrieve the credentials using the following commands:
+     ```
+     kubectl get secret postgres-credentials -o jsonpath="{.data.POSTGRES_USER}" | base64 --decode
+     kubectl get secret postgres-credentials -o jsonpath="{.data.POSTGRES_PASSWORD}" | base64 --decode
+     kubectl get secret postgres-credentials -o jsonpath="{.data.POSTGRES_DB}" | base64 --decode
+     ```
+
+5. **Persistent Volume Claims**
+   - The PVC for PostgreSQL storage is named `postgres-storage-postgres-0`.
+   - StorageClass: `ebs-csi-encrypted`
+   - Size: `8Gi`
+
+6. **Scaling**
+   - You can scale the PostgreSQL StatefulSet using the following command:
+     ```
+     kubectl scale statefulset postgres --replicas=<new-replica-count> -n {{ .Release.Namespace }}
+     ```
+
+7. **Logs**
+   - To view the logs of the PostgreSQL pod, use the following command:
+     ```
+     kubectl logs -f postgres-0 -n {{ .Release.Namespace }}
+     ```
+
+8. **Upgrading the Chart**
+   - To upgrade the Helm chart, use the following command:
+     ```
+     helm upgrade {{ .Release.Name }} ./postgres -f values.yaml
+     ```
+
+9. **Uninstalling the Chart**
+   - To uninstall the Helm chart, use the following command:
+     ```
+     helm uninstall {{ .Release.Name }} -n {{ .Release.Namespace }}
+     ```
+
+Thank you for using this PostgreSQL Helm Chart!
+
+#########################################################