merge with master and revert spec naming in k8sres

pkg/util/config/config.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 
 	"github.com/zalando/postgres-operator/pkg/spec"
+	"github.com/zalando/postgres-operator/pkg/util/constants"
 )
 
 // CRD describes CustomResourceDefinition specific configuration parameters
@@ -83,6 +84,20 @@ type LogicalBackup struct {
 	LogicalBackupS3SSE             string `name:"logical_backup_s3_sse" default:"AES256"`
 }
 
+// Operator options for connection pooler
+type ConnectionPool struct {
+	NumberOfInstances            *int32 `name:"connection_pool_number_of_instances" default:"2"`
+	Schema                       string `name:"connection_pool_schema" default:"pooler"`
+	User                         string `name:"connection_pool_user" default:"pooler"`
+	Image                        string `name:"connection_pool_image" default:"registry.opensource.zalan.do/acid/pgbouncer"`
+	Mode                         string `name:"connection_pool_mode" default:"transaction"`
+	MaxDBConnections             *int32 `name:"connection_pool_max_db_connections" default:"60"`
+	ConnPoolDefaultCPURequest    string `name:"connection_pool_default_cpu_request" default:"500m"`
+	ConnPoolDefaultMemoryRequest string `name:"connection_pool_default_memory_request" default:"100Mi"`
+	ConnPoolDefaultCPULimit      string `name:"connection_pool_default_cpu_limit" default:"1"`
+	ConnPoolDefaultMemoryLimit   string `name:"connection_pool_default_memory_limit" default:"100Mi"`
+}
+
 // Config describes operator config
 type Config struct {
 	CRD
@@ -90,6 +105,7 @@ type Config struct {
 	Auth
 	Scalyr
 	LogicalBackup
+	ConnectionPool
 
 	WatchedNamespace      string            `name:"watched_namespace"`    // special values: "*" means 'watch all namespaces', the empty string "" means 'watch a namespace where operator is deployed to'
 	EtcdHost              string            `name:"etcd_host" default:""` // special values: the empty string "" means Patroni will use K8s as a DCS
@@ -196,5 +212,10 @@ func validate(cfg *Config) (err error) {
 	if cfg.Workers == 0 {
 		err = fmt.Errorf("number of workers should be higher than 0")
 	}
+
+	if *cfg.ConnectionPool.NumberOfInstances < constants.ConnPoolMinInstances {
+		msg := "number of connection pool instances should be higher than %d"
+		err = fmt.Errorf(msg, constants.ConnPoolMinInstances)
+	}
 	return
 }