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package main
import (
"context"
"database/sql"
"errors"
"flag"
"fmt"
"os"
"os/signal"
"time"
gitalyauth "gitlab.com/gitlab-org/gitaly/v14/auth"
"gitlab.com/gitlab-org/gitaly/v14/client"
"gitlab.com/gitlab-org/gitaly/v14/internal/praefect/config"
"gitlab.com/gitlab-org/gitaly/v14/internal/praefect/datastore"
"gitlab.com/gitlab-org/gitaly/v14/internal/praefect/datastore/glsql"
"google.golang.org/grpc"
)
type subcmd interface {
FlagSet() *flag.FlagSet
Exec(flags *flag.FlagSet, config config.Config) error
}
var subcommands = map[string]subcmd{
"sql-ping": &sqlPingSubcommand{},
"sql-migrate": &sqlMigrateSubcommand{},
"dial-nodes": &dialNodesSubcommand{},
"sql-migrate-down": &sqlMigrateDownSubcommand{},
"sql-migrate-status": &sqlMigrateStatusSubcommand{},
"dataloss": newDatalossSubcommand(),
"accept-dataloss": &acceptDatalossSubcommand{},
"set-replication-factor": newSetReplicatioFactorSubcommand(os.Stdout),
removeRepositoryCmdName: newRemoveRepository(logger),
}
// subCommand returns an exit code, to be fed into os.Exit.
func subCommand(conf config.Config, arg0 string, argRest []string) int {
interrupt := make(chan os.Signal, 1)
signal.Notify(interrupt, os.Interrupt)
go func() {
<-interrupt
os.Exit(130) // indicates program was interrupted
}()
subcmd, ok := subcommands[arg0]
if !ok {
printfErr("%s: unknown subcommand: %q\n", progname, arg0)
return 1
}
flags := subcmd.FlagSet()
if err := flags.Parse(argRest); err != nil {
printfErr("%s\n", err)
return 1
}
if err := subcmd.Exec(flags, conf); err != nil {
printfErr("%s\n", err)
return 1
}
return 0
}
func getNodeAddress(cfg config.Config) (string, error) {
switch {
case cfg.SocketPath != "":
return "unix:" + cfg.SocketPath, nil
case cfg.ListenAddr != "":
return "tcp://" + cfg.ListenAddr, nil
case cfg.TLSListenAddr != "":
return "tls://" + cfg.TLSListenAddr, nil
default:
return "", errors.New("no Praefect address configured")
}
}
type sqlPingSubcommand struct{}
func (s *sqlPingSubcommand) FlagSet() *flag.FlagSet {
return flag.NewFlagSet("sql-ping", flag.ExitOnError)
}
func (s *sqlPingSubcommand) Exec(flags *flag.FlagSet, conf config.Config) error {
const subCmd = progname + " sql-ping"
db, clean, err := openDB(conf.DB)
if err != nil {
return err
}
defer clean()
if err := datastore.CheckPostgresVersion(db); err != nil {
return fmt.Errorf("%s: fail: %v", subCmd, err)
}
fmt.Printf("%s: OK\n", subCmd)
return nil
}
type sqlMigrateSubcommand struct {
ignoreUnknown bool
}
func (s *sqlMigrateSubcommand) FlagSet() *flag.FlagSet {
flags := flag.NewFlagSet("sql-migrate", flag.ExitOnError)
flags.BoolVar(&s.ignoreUnknown, "ignore-unknown", true, "ignore unknown migrations (default is true)")
return flags
}
func (s *sqlMigrateSubcommand) Exec(flags *flag.FlagSet, conf config.Config) error {
const subCmd = progname + " sql-migrate"
db, clean, err := openDB(conf.DB)
if err != nil {
return err
}
defer clean()
n, err := glsql.Migrate(db, s.ignoreUnknown)
if err != nil {
return fmt.Errorf("%s: fail: %v", subCmd, err)
}
fmt.Printf("%s: OK (applied %d migrations)\n", subCmd, n)
return nil
}
func openDB(conf config.DB) (*sql.DB, func(), error) {
db, err := glsql.OpenDB(conf)
if err != nil {
return nil, nil, fmt.Errorf("sql open: %v", err)
}
clean := func() {
if err := db.Close(); err != nil {
printfErr("sql close: %v\n", err)
}
}
return db, clean, nil
}
func printfErr(format string, a ...interface{}) (int, error) {
return fmt.Fprintf(os.Stderr, format, a...)
}
func subCmdDial(addr, token string, opts ...grpc.DialOption) (*grpc.ClientConn, error) {
ctx, cancel := context.WithTimeout(context.TODO(), 30*time.Second)
defer cancel()
opts = append(opts,
grpc.WithBlock(),
)
if len(token) > 0 {
opts = append(opts,
grpc.WithPerRPCCredentials(
gitalyauth.RPCCredentialsV2(token),
),
)
}
return client.DialContext(ctx, addr, opts)
}
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