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|
package main
import (
"flag"
"fmt"
"net/http"
"os"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
log "github.com/sirupsen/logrus"
"gitlab.com/gitlab-org/gitaly/internal/bootstrap"
"gitlab.com/gitlab-org/gitaly/internal/config"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/server"
"gitlab.com/gitlab-org/gitaly/internal/storage"
"gitlab.com/gitlab-org/gitaly/internal/tempdir"
"gitlab.com/gitlab-org/gitaly/internal/version"
"gitlab.com/gitlab-org/labkit/tracing"
)
var (
flagVersion = flag.Bool("version", false, "Print version and exit")
)
func loadConfig(configPath string) error {
cfgFile, err := os.Open(configPath)
if err != nil {
return err
}
defer cfgFile.Close()
if err = config.Load(cfgFile); err != nil {
return err
}
return config.Validate()
}
// registerServerVersionPromGauge registers a label with the current server version
// making it easy to see what versions of Gitaly are running across a cluster
func registerServerVersionPromGauge() {
gitVersion, err := git.Version()
if err != nil {
fmt.Printf("git version: %v\n", err)
os.Exit(1)
}
gitlabBuildInfoGauge := prometheus.NewGauge(prometheus.GaugeOpts{
Name: "gitlab_build_info",
Help: "Current build info for this GitLab Service",
ConstLabels: prometheus.Labels{
"version": version.GetVersion(),
"built": version.GetBuildTime(),
"git_version": gitVersion,
},
})
prometheus.MustRegister(gitlabBuildInfoGauge)
gitlabBuildInfoGauge.Set(1)
}
func flagUsage() {
fmt.Println(version.GetVersionString())
fmt.Printf("Usage: %v [OPTIONS] configfile\n", os.Args[0])
flag.PrintDefaults()
}
func main() {
flag.Usage = flagUsage
flag.Parse()
// gitaly-wrapper is supposed to set config.EnvUpgradesEnabled in order to enable graceful upgrades
_, isWrapped := os.LookupEnv(config.EnvUpgradesEnabled)
b, err := bootstrap.New(os.Getenv(config.EnvPidFile), isWrapped)
if err != nil {
log.WithError(err).Fatal("init bootstrap")
}
// If invoked with -version
if *flagVersion {
fmt.Println(version.GetVersionString())
os.Exit(0)
}
if flag.NArg() != 1 || flag.Arg(0) == "" {
flag.Usage()
os.Exit(2)
}
log.WithField("version", version.GetVersionString()).Info("Starting Gitaly")
registerServerVersionPromGauge()
configPath := flag.Arg(0)
if err := loadConfig(configPath); err != nil {
log.WithError(err).WithField("config_path", configPath).Fatal("load config")
}
config.ConfigureLogging()
config.ConfigureSentry(version.GetVersion())
config.ConfigurePrometheus()
config.ConfigureConcurrencyLimits()
tracing.Initialize(tracing.WithServiceName("gitaly"))
tempdir.StartCleaning()
log.WithError(run(b)).Error("shutting down")
}
// Inside here we can use deferred functions. This is needed because
// log.Fatal bypasses deferred functions.
func run(b *bootstrap.Bootstrap) error {
servers := bootstrap.NewServerFactory()
defer servers.Stop()
b.StopAction = servers.GracefulStop
for _, c := range []starterConfig{
{unix, config.Config.SocketPath},
{tcp, config.Config.ListenAddr},
{tls, config.Config.TLSListenAddr},
} {
if c.addr == "" {
continue
}
b.RegisterStarter(gitalyStarter(c, servers))
}
if addr := config.Config.PrometheusListenAddr; addr != "" {
b.RegisterStarter(func(listen bootstrap.ListenFunc, _ chan<- error) error {
l, err := listen("tcp", addr)
if err != nil {
return err
}
log.WithField("address", addr).Info("starting prometheus listener")
promMux := http.NewServeMux()
promMux.Handle("/metrics", promhttp.Handler())
server.AddPprofHandlers(promMux)
go func() {
if err := http.Serve(l, promMux); err != nil {
log.WithError(err).Error("Unable to serve prometheus")
}
}()
return nil
})
}
for _, shard := range config.Config.Storages {
if err := storage.WriteMetadataFile(shard); err != nil {
// TODO should this be a return? https://gitlab.com/gitlab-org/gitaly/issues/1893
log.WithError(err).Error("Unable to write gitaly metadata file")
}
}
if err := b.Start(); err != nil {
return fmt.Errorf("unable to start the bootstrap: %v", err)
}
if err := servers.StartRuby(); err != nil {
return fmt.Errorf("initialize gitaly-ruby: %v", err)
}
return b.Wait()
}
|
