add environment

environment/postgres-cluster/cluster.yaml

@@ -0,0 +1,31 @@
+apiVersion: postgresql.cnpg.io/v1
+kind: Cluster
+metadata:
+  name: postgres-cluster
+spec:
+  instances: 2
+  postgresql:
+    parameters:
+      max_connections: "100"
+      shared_buffers: "256MB"
+      effective_cache_size: "1GB"
+      maintenance_work_mem: "64MB"
+      checkpoint_completion_target: "0.9"
+      wal_buffers: "16MB"
+      default_statistics_target: "100"
+      random_page_cost: "1.1"
+      effective_io_concurrency: "200"
+      work_mem: "4MB"
+      min_wal_size: "1GB"
+      max_wal_size: "4GB"
+  storage:
+    size: 20Gi
+    storageClass: local-path
+  resources:
+    requests:
+      memory: "256Mi"
+      cpu: "250m"
+    limits:
+      memory: "512Mi"
+      cpu: "500m"
+