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|
package main
import (
"context"
"errors"
"flag"
"fmt"
"os"
"strings"
"gitlab.com/gitlab-org/gitaly/internal/bootstrap"
"gitlab.com/gitlab-org/gitaly/internal/bootstrap/starter"
"gitlab.com/gitlab-org/gitaly/internal/config/sentry"
"gitlab.com/gitlab-org/gitaly/internal/log"
"gitlab.com/gitlab-org/gitaly/internal/praefect"
"gitlab.com/gitlab-org/gitaly/internal/praefect/config"
"gitlab.com/gitlab-org/gitaly/internal/praefect/conn"
"gitlab.com/gitlab-org/gitaly/internal/praefect/datastore"
"gitlab.com/gitlab-org/gitaly/internal/praefect/protoregistry"
"gitlab.com/gitlab-org/gitaly/internal/version"
"gitlab.com/gitlab-org/labkit/monitoring"
"gitlab.com/gitlab-org/labkit/tracing"
)
var (
flagConfig = flag.String("config", "", "Location for the config.toml")
flagVersion = flag.Bool("version", false, "Print version and exit")
logger = log.Default()
errNoConfigFile = errors.New("the config flag must be passed")
)
func main() {
flag.Parse()
// If invoked with -version
if *flagVersion {
fmt.Println(praefect.GetVersionString())
os.Exit(0)
}
conf, err := configure()
if err != nil {
logger.Fatal(err)
}
starterConfigs, err := getStarterConfigs(conf.SocketPath, conf.ListenAddr)
if err != nil {
logger.Fatalf("%s", err)
}
if err := run(starterConfigs, conf); err != nil {
logger.Fatalf("%v", err)
}
}
func configure() (config.Config, error) {
var conf config.Config
if *flagConfig == "" {
if len(os.Args) < 2 {
return conf, errNoConfigFile
}
*flagConfig = os.Args[1]
}
conf, err := config.FromFile(*flagConfig)
if err != nil {
return conf, fmt.Errorf("error reading config file: %v", err)
}
if err := conf.Validate(); err != nil {
return conf, err
}
logger = conf.ConfigureLogger()
tracing.Initialize(tracing.WithServiceName("praefect"))
if conf.PrometheusListenAddr != "" {
logger.WithField("address", conf.PrometheusListenAddr).Info("Starting prometheus listener")
go func() {
if err := monitoring.Serve(
monitoring.WithListenerAddress(conf.PrometheusListenAddr),
monitoring.WithBuildInformation(praefect.GetVersion(), praefect.GetBuildTime())); err != nil {
logger.WithError(err).Errorf("Unable to start healthcheck listener: %v", conf.PrometheusListenAddr)
}
}()
}
logger.WithField("version", praefect.GetVersionString()).Info("Starting Praefect")
sentry.ConfigureSentry(version.GetVersion(), conf.Sentry)
return conf, nil
}
func run(cfgs []starter.Config, conf config.Config) error {
clientConnections := conn.NewClientConnections()
for _, virtualStorage := range conf.VirtualStorages {
for _, node := range virtualStorage.Nodes {
if _, err := clientConnections.GetConnection(node.Storage); err == nil {
continue
}
if err := clientConnections.RegisterNode(node.Storage, node.Address, node.Token); err != nil {
return fmt.Errorf("failed to register %s: %s", node.Address, err)
}
logger.WithField("node_address", node.Address).Info("registered gitaly node")
}
}
var (
// top level server dependencies
ds = datastore.NewInMemory(conf)
coordinator = praefect.NewCoordinator(logger, ds, clientConnections, conf, protoregistry.GitalyProtoFileDescriptors...)
repl = praefect.NewReplMgr("default", logger, ds, clientConnections)
srv = praefect.NewServer(coordinator, repl, nil, logger, clientConnections, conf)
serverErrors = make(chan error, 1)
)
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
_, isWrapped := os.LookupEnv(config.EnvUpgradesEnabled)
b, err := bootstrap.New(os.Getenv(config.EnvPidFile), isWrapped)
if err != nil {
return fmt.Errorf("unable to create a bootstrap: %v", err)
}
srv.RegisterServices()
b.StopAction = srv.GracefulStop
for _, cfg := range cfgs {
b.RegisterStarter(starter.New(cfg, srv))
}
if err := b.Start(); err != nil {
return fmt.Errorf("unable to start the bootstrap: %v", err)
}
go func() { serverErrors <- b.Wait() }()
go func() { serverErrors <- repl.ProcessBacklog(ctx) }()
go coordinator.FailoverRotation()
return <-serverErrors
}
func getStarterConfigs(socketPath, listenAddr string) ([]starter.Config, error) {
var cfgs []starter.Config
if socketPath != "" {
if err := os.RemoveAll(socketPath); err != nil {
return nil, err
}
cleanPath := strings.TrimPrefix(socketPath, "unix:")
cfgs = append(cfgs, starter.Config{Name: starter.Unix, Addr: cleanPath})
logger.WithField("address", socketPath).Info("listening on unix socket")
}
if listenAddr != "" {
cleanAddr := strings.TrimPrefix(listenAddr, "tcp://")
cfgs = append(cfgs, starter.Config{Name: starter.TCP, Addr: cleanAddr})
logger.WithField("address", listenAddr).Info("listening at tcp address")
}
return cfgs, nil
}
|
