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// GoToSocial
// Copyright (C) GoToSocial Authors admin@gotosocial.org
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//go:build !nopostgres
package bundb
import (
"context"
"crypto/tls"
"crypto/x509"
"database/sql"
"encoding/pem"
"errors"
"fmt"
"math"
"os"
"time"
"code.superseriousbusiness.org/gotosocial/internal/config"
"code.superseriousbusiness.org/gotosocial/internal/db/postgres"
"code.superseriousbusiness.org/gotosocial/internal/log"
"github.com/jackc/pgx/v5"
"github.com/jackc/pgx/v5/stdlib"
"github.com/uptrace/bun/dialect/pgdialect"
"github.com/uptrace/bun/schema"
)
func init() {
// register our SQL driver implementations.
sql.Register("pgx-gts", &postgres.Driver{})
}
func pgConn(ctx context.Context) (*sql.DB, func() schema.Dialect, error) {
opts, err := deriveBunDBPGOptions() //nolint:contextcheck
if err != nil {
return nil, nil, fmt.Errorf("could not create bundb postgres options: %w", err)
}
cfg := stdlib.RegisterConnConfig(opts)
sqldb, err := sql.Open("pgx-gts", cfg)
if err != nil {
return nil, nil, fmt.Errorf("could not open postgres db: %w", err)
}
// Tune db connections for postgres, see:
// - https://bun.uptrace.dev/guide/running-bun-in-production.html#database-sql
// - https://www.alexedwards.net/blog/configuring-sqldb
sqldb.SetMaxOpenConns(maxOpenConns()) // x number of conns per CPU
sqldb.SetMaxIdleConns(2) // assume default 2; if max idle is less than max open, it will be automatically adjusted
sqldb.SetConnMaxLifetime(5 * time.Minute) // fine to kill old connections
// ping to check the db is there and listening
if err := sqldb.PingContext(ctx); err != nil {
return nil, nil, fmt.Errorf("postgres ping: %w", err)
}
log.Info(ctx, "connected to POSTGRES database")
return sqldb, func() schema.Dialect { return pgdialect.New() }, nil
}
// deriveBunDBPGOptions takes an application config and returns either a ready-to-use set of options
// with sensible defaults, or an error if it's not satisfied by the provided config.
func deriveBunDBPGOptions() (*pgx.ConnConfig, error) {
// If database URL is defined, ignore
// other DB-related configuration fields.
if url := config.GetDbPostgresConnectionString(); url != "" {
return pgx.ParseConfig(url)
}
// these are all optional, the db adapter figures out defaults
address := config.GetDbAddress()
// validate database
database := config.GetDbDatabase()
if database == "" {
return nil, errors.New("no database set")
}
var tlsConfig *tls.Config
switch config.GetDbTLSMode() {
case "", "disable":
break // nothing to do
case "enable":
tlsConfig = &tls.Config{
InsecureSkipVerify: true, //nolint:gosec
}
case "require":
tlsConfig = &tls.Config{
InsecureSkipVerify: false,
ServerName: address,
MinVersion: tls.VersionTLS12,
}
}
if certPath := config.GetDbTLSCACert(); tlsConfig != nil && certPath != "" {
// load the system cert pool first -- we'll append the given CA cert to this
certPool, err := x509.SystemCertPool()
if err != nil {
return nil, fmt.Errorf("error fetching system CA cert pool: %s", err)
}
// open the file itself and make sure there's something in it
caCertBytes, err := os.ReadFile(certPath)
if err != nil {
return nil, fmt.Errorf("error opening CA certificate at %s: %s", certPath, err)
}
if len(caCertBytes) == 0 {
return nil, fmt.Errorf("ca cert at %s was empty", certPath)
}
// make sure we have a PEM block
caPem, _ := pem.Decode(caCertBytes)
if caPem == nil {
return nil, fmt.Errorf("could not parse cert at %s into PEM", certPath)
}
// parse the PEM block into the certificate
caCert, err := x509.ParseCertificate(caPem.Bytes)
if err != nil {
return nil, fmt.Errorf("could not parse cert at %s into x509 certificate: %w", certPath, err)
}
// we're happy, add it to the existing pool and then use this pool in our tls config
certPool.AddCert(caCert)
tlsConfig.RootCAs = certPool
}
cfg, _ := pgx.ParseConfig("")
if address != "" {
cfg.Host = address
}
if port := config.GetDbPort(); port > 0 {
if port > math.MaxUint16 {
return nil, errors.New("invalid port, must be in range 1-65535")
}
cfg.Port = uint16(port) // #nosec G115 -- Just validated above.
}
if u := config.GetDbUser(); u != "" {
cfg.User = u
}
if p := config.GetDbPassword(); p != "" {
cfg.Password = p
}
if tlsConfig != nil {
cfg.TLSConfig = tlsConfig
}
cfg.Database = database
cfg.RuntimeParams["application_name"] = config.GetApplicationName()
return cfg, nil
}
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