fix(db): sets max open and idle connections for postgres

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Code reorganisation, a lot of code has moved, please review the following PRs accordingly [#1444](https://github.com/juanfont/headscale/pull/1444)
 
 ### Changes
+- Set max open and idle connections for postgres
 
 ## 0.22.3 (2023-05-12)
 
@@ -19,7 +20,7 @@
 ### Changes
 
 - Add environment flags to enable pprof (profiling) [#1382](https://github.com/juanfont/headscale/pull/1382)
-  - Profiles are continously generated in our integration tests.
+- Profiles are continously generated in our integration tests.
 - Fix systemd service file location in `.deb` packages [#1391](https://github.com/juanfont/headscale/pull/1391)
 - Improvements on Noise implementation [#1379](https://github.com/juanfont/headscale/pull/1379)
 - Replace node filter logic, ensuring nodes with access can see eachother [#1381](https://github.com/juanfont/headscale/pull/1381)

hscontrol/db.go

@@ -20,6 +20,10 @@ import (
 const (
 	dbVersion = "1"
 
+	_pgsqlMaxOpenConnections    = 10
+	_pgsqlMaxIdleConnections    = 10
+	_pgsqlMaxConnectionLifetime = 1 * time.Hour
+
 	errValueNotFound     = Error("not found")
 	ErrCannotParsePrefix = Error("cannot parse prefix")
 )
@@ -251,10 +255,17 @@ func (h *Headscale) openDB() (*gorm.DB, error) {
 		sqlDB.SetConnMaxIdleTime(time.Hour)
 
 	case Postgres:
-		db, err = gorm.Open(postgres.Open(h.dbString), &gorm.Config{
+		db, err := gorm.Open(postgres.Open(h.dbString), &gorm.Config{
 			DisableForeignKeyConstraintWhenMigrating: true,
 			Logger:                                   log,
 		})
+
+		sqlDB, _ := db.DB()
+		sqlDB.SetMaxOpenConns(_pgsqlMaxOpenConnections)
+		sqlDB.SetMaxIdleConns(_pgsqlMaxIdleConnections)
+		sqlDB.SetConnMaxLifetime(_pgsqlMaxConnectionLifetime)
+
+		return db, err
 	}
 
 	if err != nil {