# PostgreSQL (Production) Helm Values
# Chart: https://github.com/bitnami/charts/tree/main/bitnami/postgresql
# Architecture: Primary + 2 Read Replicas with streaming replication

fullnameOverride: postgresql

# Use latest tag (ARM64 compatible)
image:
  tag: latest

architecture: replication

auth:
  existingSecret: postgresql-password
  secretKeys:
    adminPasswordKey: postgres-password
    userPasswordKey: password
    replicationPasswordKey: replication-password
  username: bluemayne
  database: postgres

primary:
  persistence:
    enabled: true
    size: 20Gi
    storageClass: local-path
  
  # PostgreSQL configuration
  extendedConfiguration: |
    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 = 1310kB
    min_wal_size = 1GB
    max_wal_size = 4GB
  
  resources:
    requests:
      memory: "512Mi"
      cpu: "30m"  # Reduced to 30% of original (100m -> 30m)

readReplicas:
  replicaCount: 2
  persistence:
    enabled: true
    size: 20Gi
    storageClass: local-path

  # PostgreSQL configuration (must match primary for replication)
  extendedConfiguration: |
    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 = 1310kB
    min_wal_size = 1GB
    max_wal_size = 4GB

  # Force read replicas to different nodes for better availability
  # Avoid scheduling on the same node as primary or other read replicas
  affinity:
    podAntiAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
      - labelSelector:
          matchLabels:
            app.kubernetes.io/component: read
            app.kubernetes.io/instance: postgresql
            app.kubernetes.io/name: postgresql
        topologyKey: kubernetes.io/hostname
      - labelSelector:
          matchLabels:
            app.kubernetes.io/component: primary
            app.kubernetes.io/instance: postgresql
            app.kubernetes.io/name: postgresql
        topologyKey: kubernetes.io/hostname

  resources:
    requests:
      memory: "512Mi"
      cpu: "30m"  # Reduced to 30% of original (100m -> 30m)

# Metrics for Prometheus (disabled due to ARM64 compatibility)
metrics:
  enabled: false