---
apiVersion: postgresql.cnpg.io/v1
kind: Cluster
metadata:
  name: postgresql
  namespace: database-system
spec:
  instances: 1  # Start with 1, scale to 3 later for HA
  
  # PostgreSQL version
  imageName: ghcr.io/cloudnative-pg/postgresql:17.2
  
  # Bootstrap
  bootstrap:
    initdb:
      database: postgres
      owner: postgres
      secret:
        name: postgres-superuser
  
  # Storage
  storage:
    storageClass: longhorn
    size: 50Gi
  
  # Resources
  resources:
    requests:
      memory: "512Mi"
      cpu: "500m"
    limits:
      memory: "4Gi"
      cpu: "2000m"
  
  # Monitoring
  monitoring:
    enablePodMonitor: true
  
  # Backup configuration (optional but recommended)
  #backup:
  #  barmanObjectStore:
  #    destinationPath: s3://your-bucket/postgresql-backups/
      # Configure your S3-compatible storage here
      # Or skip backups for now and add later
      
  # PostgreSQL configuration
  postgresql:
    parameters:
      max_connections: "200"
      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: "2621kB"
      min_wal_size: "1GB"
      max_wal_size: "4GB"