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postgres.go
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postgres.go
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// Copyright (c) 2022 Gobalsky Labs Limited
//
// Use of this software is governed by the Business Source License included
// in the LICENSE file and at https://www.mariadb.com/bsl11.
//
// Change Date: 18 months from the later of the date of the first publicly
// available Distribution of this version of the repository, and 25 June 2022.
//
// On the date above, in accordance with the Business Source License, use
// of this software will be governed by version 3 or later of the GNU General
// Public License.
package commands
import (
"context"
"fmt"
"os"
"os/signal"
"syscall"
"code.vegaprotocol.io/vega/datanode/config"
"code.vegaprotocol.io/vega/logging"
"code.vegaprotocol.io/vega/paths"
embeddedpostgres "github.com/fergusstrange/embedded-postgres"
"github.com/jessevdk/go-flags"
)
type PostgresCmd struct {
Run PostgresRunCmd `command:"run"`
}
var postgresCmd PostgresCmd
func Postgres(ctx context.Context, parser *flags.Parser) error {
postgresCmd = PostgresCmd{
Run: PostgresRunCmd{},
}
_, err := parser.AddCommand("postgres", "Embedded Postgres", "Embedded Postgres", &postgresCmd)
return err
}
type PostgresRunCmd struct {
config.VegaHomeFlag
config.Config
}
func (cmd *PostgresRunCmd) Execute(_ []string) error {
log := logging.NewLoggerFromConfig(
logging.NewDefaultConfig(),
)
defer log.AtExit()
log.Info("Launching Postgres")
// we define this option to parse the cli args each time the config is
// loaded. So that we can respect the cli flag precedence.
parseFlagOpt := func(cfg *config.Config) error {
_, err := flags.NewParser(cfg, flags.Default|flags.IgnoreUnknown).Parse()
return err
}
vegaPaths := paths.New(cmd.VegaHome)
configWatcher, err := config.NewWatcher(context.Background(), log, vegaPaths, config.Use(parseFlagOpt))
if err != nil {
return err
}
cmd.Config = configWatcher.Get()
stateDir := vegaPaths.StatePathFor(paths.DataNodeStorageHome)
dbConfig := embeddedpostgres.DefaultConfig().
Username(cmd.Config.SQLStore.ConnectionConfig.Username).
Password(cmd.Config.SQLStore.ConnectionConfig.Password).
Database(cmd.Config.SQLStore.ConnectionConfig.Database).
Port(uint32(cmd.Config.SQLStore.ConnectionConfig.Port)).
RuntimePath(paths.JoinStatePath(paths.StatePath(stateDir), "sqlstore").String()).
DataPath(paths.JoinStatePath(paths.StatePath(stateDir), "sqlstore", "node-data").String())
db := embeddedpostgres.NewDatabase(dbConfig)
err = db.Start()
if err != nil {
return err
}
gracefulStop := make(chan os.Signal, 1)
signal.Notify(gracefulStop, syscall.SIGTERM, syscall.SIGINT)
// It would be nice to watch the child process itself and return if it exits unexpectedly,
// but embedded-postgres-go doesn't give us a way to do that right now.
sig := <-gracefulStop
log.Info("Caught signal", logging.String("name", fmt.Sprintf("%+v", sig)))
return db.Stop()
}