283 lines
7.4 KiB
Go
283 lines
7.4 KiB
Go
package main
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import (
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"crypto/tls"
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"crypto/x509"
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_ "expvar"
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"flag"
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"fmt"
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"io/ioutil"
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"net/http"
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_ "net/http/pprof"
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"os"
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log "github.com/Sirupsen/logrus"
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"github.com/Sirupsen/logrus/formatters/logstash"
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"github.com/bugsnag/bugsnag-go"
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"github.com/docker/distribution/configuration"
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ctxu "github.com/docker/distribution/context"
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_ "github.com/docker/distribution/health"
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_ "github.com/docker/distribution/registry/auth/silly"
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_ "github.com/docker/distribution/registry/auth/token"
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"github.com/docker/distribution/registry/handlers"
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_ "github.com/docker/distribution/registry/storage/driver/azure"
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_ "github.com/docker/distribution/registry/storage/driver/filesystem"
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_ "github.com/docker/distribution/registry/storage/driver/inmemory"
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_ "github.com/docker/distribution/registry/storage/driver/middleware/cloudfront"
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_ "github.com/docker/distribution/registry/storage/driver/s3"
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"github.com/docker/distribution/version"
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gorhandlers "github.com/gorilla/handlers"
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"github.com/yvasiyarov/gorelic"
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"golang.org/x/net/context"
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)
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var showVersion bool
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func init() {
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flag.BoolVar(&showVersion, "version", false, "show the version and exit")
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}
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func main() {
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flag.Usage = usage
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flag.Parse()
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if showVersion {
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version.PrintVersion()
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return
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}
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ctx := context.Background()
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config, err := resolveConfiguration()
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if err != nil {
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fatalf("configuration error: %v", err)
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}
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ctx, err = configureLogging(ctx, config)
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if err != nil {
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fatalf("error configuring logger: %v", err)
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}
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app := handlers.NewApp(ctx, *config)
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handler := configureReporting(app)
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handler = gorhandlers.CombinedLoggingHandler(os.Stdout, handler)
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if config.HTTP.Debug.Addr != "" {
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go debugServer(config.HTTP.Debug.Addr)
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}
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if config.HTTP.TLS.Certificate == "" {
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ctxu.GetLogger(app).Infof("listening on %v", config.HTTP.Addr)
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if err := http.ListenAndServe(config.HTTP.Addr, handler); err != nil {
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ctxu.GetLogger(app).Fatalln(err)
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}
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} else {
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tlsConf := &tls.Config{
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ClientAuth: tls.NoClientCert,
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}
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if len(config.HTTP.TLS.ClientCAs) != 0 {
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pool := x509.NewCertPool()
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for _, ca := range config.HTTP.TLS.ClientCAs {
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caPem, err := ioutil.ReadFile(ca)
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if err != nil {
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ctxu.GetLogger(app).Fatalln(err)
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}
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if ok := pool.AppendCertsFromPEM(caPem); !ok {
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ctxu.GetLogger(app).Fatalln(fmt.Errorf("Could not add CA to pool"))
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}
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}
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for _, subj := range pool.Subjects() {
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ctxu.GetLogger(app).Debugf("CA Subject: %s", string(subj))
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}
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tlsConf.ClientAuth = tls.RequireAndVerifyClientCert
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tlsConf.ClientCAs = pool
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}
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ctxu.GetLogger(app).Infof("listening on %v, tls", config.HTTP.Addr)
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server := &http.Server{
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Addr: config.HTTP.Addr,
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Handler: handler,
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TLSConfig: tlsConf,
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}
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if err := server.ListenAndServeTLS(config.HTTP.TLS.Certificate, config.HTTP.TLS.Key); err != nil {
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ctxu.GetLogger(app).Fatalln(err)
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}
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}
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}
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func usage() {
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fmt.Fprintln(os.Stderr, "usage:", os.Args[0], "<config>")
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flag.PrintDefaults()
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}
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func fatalf(format string, args ...interface{}) {
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fmt.Fprintf(os.Stderr, format+"\n", args...)
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usage()
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os.Exit(1)
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}
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func resolveConfiguration() (*configuration.Configuration, error) {
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var configurationPath string
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if flag.NArg() > 0 {
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configurationPath = flag.Arg(0)
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} else if os.Getenv("REGISTRY_CONFIGURATION_PATH") != "" {
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configurationPath = os.Getenv("REGISTRY_CONFIGURATION_PATH")
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}
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if configurationPath == "" {
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return nil, fmt.Errorf("configuration path unspecified")
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}
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fp, err := os.Open(configurationPath)
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if err != nil {
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return nil, err
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}
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config, err := configuration.Parse(fp)
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if err != nil {
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return nil, fmt.Errorf("error parsing %s: %v", configurationPath, err)
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}
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return config, nil
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}
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func configureReporting(app *handlers.App) http.Handler {
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var handler http.Handler = app
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if app.Config.Reporting.Bugsnag.APIKey != "" {
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bugsnagConfig := bugsnag.Configuration{
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APIKey: app.Config.Reporting.Bugsnag.APIKey,
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// TODO(brianbland): provide the registry version here
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// AppVersion: "2.0",
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}
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if app.Config.Reporting.Bugsnag.ReleaseStage != "" {
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bugsnagConfig.ReleaseStage = app.Config.Reporting.Bugsnag.ReleaseStage
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}
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if app.Config.Reporting.Bugsnag.Endpoint != "" {
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bugsnagConfig.Endpoint = app.Config.Reporting.Bugsnag.Endpoint
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}
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bugsnag.Configure(bugsnagConfig)
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handler = bugsnag.Handler(handler)
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}
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if app.Config.Reporting.NewRelic.LicenseKey != "" {
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agent := gorelic.NewAgent()
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agent.NewrelicLicense = app.Config.Reporting.NewRelic.LicenseKey
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if app.Config.Reporting.NewRelic.Name != "" {
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agent.NewrelicName = app.Config.Reporting.NewRelic.Name
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}
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agent.CollectHTTPStat = true
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agent.Verbose = true
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agent.Run()
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handler = agent.WrapHTTPHandler(handler)
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}
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return handler
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}
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// configureLogging prepares the context with a logger using the
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// configuration.
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func configureLogging(ctx context.Context, config *configuration.Configuration) (context.Context, error) {
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if config.Log.Level == "" && config.Log.Formatter == "" {
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// If no config for logging is set, fallback to deprecated "Loglevel".
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log.SetLevel(logLevel(config.Loglevel))
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ctx = ctxu.WithLogger(ctx, ctxu.GetLogger(ctx, "version"))
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return ctx, nil
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}
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log.SetLevel(logLevel(config.Log.Level))
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switch config.Log.Formatter {
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case "json":
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log.SetFormatter(&log.JSONFormatter{})
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case "text":
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log.SetFormatter(&log.TextFormatter{})
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case "logstash":
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log.SetFormatter(&logstash.LogstashFormatter{})
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default:
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// just let the library use default on empty string.
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if config.Log.Formatter != "" {
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return ctx, fmt.Errorf("unsupported logging formatter: %q", config.Log.Formatter)
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}
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}
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if config.Log.Formatter != "" {
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log.Debugf("using %q logging formatter", config.Log.Formatter)
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}
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// log the application version with messages
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ctx = context.WithValue(ctx, "version", version.Version)
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if len(config.Log.Fields) > 0 {
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// build up the static fields, if present.
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var fields []interface{}
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for k := range config.Log.Fields {
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fields = append(fields, k)
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}
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ctx = withMapContext(ctx, config.Log.Fields)
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ctx = ctxu.WithLogger(ctx, ctxu.GetLogger(ctx, fields...))
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}
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return ctx, nil
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}
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func logLevel(level configuration.Loglevel) log.Level {
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l, err := log.ParseLevel(string(level))
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if err != nil {
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l = log.InfoLevel
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log.Warnf("error parsing level %q: %v, using %q ", level, err, l)
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}
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return l
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}
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// stringMapContext is a simple context implementation that checks a map for a
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// key, falling back to a parent if not present.
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type stringMapContext struct {
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context.Context
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m map[string]string
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}
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// withMapContext returns a context that proxies lookups through a map.
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func withMapContext(ctx context.Context, m map[string]string) context.Context {
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mo := make(map[string]string, len(m)) // make our own copy.
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for k, v := range m {
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mo[k] = v
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}
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return stringMapContext{
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Context: ctx,
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m: mo,
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}
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}
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func (smc stringMapContext) Value(key interface{}) interface{} {
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if ks, ok := key.(string); ok {
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if v, ok := smc.m[ks]; ok {
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return v
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}
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}
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return smc.Context.Value(key)
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}
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// debugServer starts the debug server with pprof, expvar among other
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// endpoints. The addr should not be exposed externally. For most of these to
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// work, tls cannot be enabled on the endpoint, so it is generally separate.
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func debugServer(addr string) {
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log.Infof("debug server listening %v", addr)
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if err := http.ListenAndServe(addr, nil); err != nil {
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log.Fatalf("error listening on debug interface: %v", err)
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}
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}
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