Limit database connections (#980, #564) (#998)

* Limit database connections (#564)

- Add new options to the config file database:
      max_open_conns: 100
      max_idle_conns: 2
      conn_max_lifetime: -1
- Implement connection parameter setup on the *DB (database/sql) in internal/sqlutil/trace.go:Open()
- Propagate the values in the form of DbProperties interface via all the
  Open() and NewDatabase() functions

Signed-off-by: Tomas Jirka <tomas.jirka@email.cz>

* Fix wasm builds

* Remove file accidentally added from working tree

Co-authored-by: Tomas Jirka <tomas.jirka@email.cz>

5 files changed, 15 insertions, 9 deletions

diff --git a/mediaapi/mediaapi.go b/mediaapi/mediaapi.go
index f2e614c1..4a0f5d18 100644
--- a/mediaapi/mediaapi.go
+++ b/mediaapi/mediaapi.go
@@ -29,7 +29,7 @@ func SetupMediaAPIComponent(
 	base *basecomponent.BaseDendrite,
 	deviceDB devices.Database,
 ) {
-	mediaDB, err := storage.Open(string(base.Cfg.Database.MediaAPI))
+	mediaDB, err := storage.Open(string(base.Cfg.Database.MediaAPI), base.Cfg.DbProperties())
 	if err != nil {
 		logrus.WithError(err).Panicf("failed to connect to media db")
 	}
diff --git a/mediaapi/storage/postgres/storage.go b/mediaapi/storage/postgres/storage.go
index 18126b15..4ddfc8fd 100644
--- a/mediaapi/storage/postgres/storage.go
+++ b/mediaapi/storage/postgres/storage.go
@@ -21,6 +21,7 @@ import (
 
 	// Import the postgres database driver.
 	_ "github.com/lib/pq"
+	"github.com/matrix-org/dendrite/common"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/dendrite/mediaapi/types"
 	"github.com/matrix-org/gomatrixserverlib"
@@ -33,10 +34,10 @@ type Database struct {
 }
 
 // Open opens a postgres database.
-func Open(dataSourceName string) (*Database, error) {
+func Open(dataSourceName string, dbProperties common.DbProperties) (*Database, error) {
 	var d Database
 	var err error
-	if d.db, err = sqlutil.Open("postgres", dataSourceName); err != nil {
+	if d.db, err = sqlutil.Open("postgres", dataSourceName, dbProperties); err != nil {
 		return nil, err
 	}
 	if err = d.statements.prepare(d.db); err != nil {
diff --git a/mediaapi/storage/sqlite3/storage.go b/mediaapi/storage/sqlite3/storage.go
index abafecf2..8fa2e537 100644
--- a/mediaapi/storage/sqlite3/storage.go
+++ b/mediaapi/storage/sqlite3/storage.go
@@ -37,7 +37,7 @@ type Database struct {
 func Open(dataSourceName string) (*Database, error) {
 	var d Database
 	var err error
-	if d.db, err = sqlutil.Open(common.SQLiteDriverName(), dataSourceName); err != nil {
+	if d.db, err = sqlutil.Open(common.SQLiteDriverName(), dataSourceName, nil); err != nil {
 		return nil, err
 	}
 	if err = d.statements.prepare(d.db); err != nil {
diff --git a/mediaapi/storage/storage.go b/mediaapi/storage/storage.go
index c533477c..6589c830 100644
--- a/mediaapi/storage/storage.go
+++ b/mediaapi/storage/storage.go
@@ -19,22 +19,23 @@ package storage
 import (
 	"net/url"
 
+	"github.com/matrix-org/dendrite/common"
 	"github.com/matrix-org/dendrite/mediaapi/storage/postgres"
 	"github.com/matrix-org/dendrite/mediaapi/storage/sqlite3"
 )
 
 // Open opens a postgres database.
-func Open(dataSourceName string) (Database, error) {
+func Open(dataSourceName string, dbProperties common.DbProperties) (Database, error) {
 	uri, err := url.Parse(dataSourceName)
 	if err != nil {
-		return postgres.Open(dataSourceName)
+		return postgres.Open(dataSourceName, dbProperties)
 	}
 	switch uri.Scheme {
 	case "postgres":
-		return postgres.Open(dataSourceName)
+		return postgres.Open(dataSourceName, dbProperties)
 	case "file":
 		return sqlite3.Open(dataSourceName)
 	default:
-		return postgres.Open(dataSourceName)
+		return postgres.Open(dataSourceName, dbProperties)
 	}
 }
diff --git a/mediaapi/storage/storage_wasm.go b/mediaapi/storage/storage_wasm.go
index 92f0ad13..3c39e5d3 100644
--- a/mediaapi/storage/storage_wasm.go
+++ b/mediaapi/storage/storage_wasm.go
@@ -18,11 +18,15 @@ import (
 	"fmt"
 	"net/url"
 
+	"github.com/matrix-org/dendrite/common"
 	"github.com/matrix-org/dendrite/mediaapi/storage/sqlite3"
 )
 
 // Open opens a postgres database.
-func Open(dataSourceName string) (Database, error) {
+func Open(
+	dataSourceName string,
+	dbProperties common.DbProperties, // nolint:unparam
+) (Database, error) {
 	uri, err := url.Parse(dataSourceName)
 	if err != nil {
 		return nil, fmt.Errorf("Cannot use postgres implementation")