apiVersion: postgresql.cnpg.io/v1
kind: Pooler
metadata:
  name: pgbouncer
  annotations:
    argocd.argoproj.io/sync-wave: "20"
spec:
  cluster:
    name: postgres
  instances: 3
  type: rw
  pgbouncer:
    poolMode: session
    parameters:
      # 3 replicas with 100 connections = 300 connections total
      # postgres has max of 500 connections
      max_client_conn: "100"
      default_pool_size: "10"
      ignore_startup_parameters: "search_path"
  deploymentStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  # monitoring:
  #   enablePodMonitor: true
  # PodTemplateSpec
  template:
    metadata:
      labels:
        app.kubernetes.io/name: pooler
    spec:
      containers: [] # suppress error
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 100
              podAffinityTerm:
                labelSelector:
                  matchExpressions:
                    - key: app.kubernetes.io/name
                      operator: In
                      values:
                        - pooler
                topologyKey: kubernetes.io/hostname # node hostname