distribution/cmd/registry/main.go
Stephen Day 15a7926288 Merge pull request #230 from diogomonica/adding-healthcheck
registry/health: adding healthcheck package
2015-03-20 17:15:37 -07:00

167 lines
4.5 KiB
Go

package main
import (
_ "expvar"
"flag"
"fmt"
"net/http"
_ "net/http/pprof"
"os"
log "github.com/Sirupsen/logrus"
"github.com/bugsnag/bugsnag-go"
"github.com/docker/distribution/configuration"
ctxu "github.com/docker/distribution/context"
_ "github.com/docker/distribution/health"
_ "github.com/docker/distribution/registry/auth/silly"
_ "github.com/docker/distribution/registry/auth/token"
"github.com/docker/distribution/registry/handlers"
_ "github.com/docker/distribution/registry/storage/driver/filesystem"
_ "github.com/docker/distribution/registry/storage/driver/inmemory"
_ "github.com/docker/distribution/registry/storage/driver/middleware/cloudfront"
_ "github.com/docker/distribution/registry/storage/driver/s3"
"github.com/docker/distribution/version"
gorhandlers "github.com/gorilla/handlers"
"github.com/yvasiyarov/gorelic"
"golang.org/x/net/context"
)
var showVersion bool
func init() {
flag.BoolVar(&showVersion, "version", false, "show the version and exit")
}
func main() {
flag.Usage = usage
flag.Parse()
if showVersion {
version.PrintVersion()
return
}
ctx := context.Background()
config, err := resolveConfiguration()
if err != nil {
fatalf("configuration error: %v", err)
}
log.SetLevel(logLevel(config.Loglevel))
ctx = context.WithValue(ctx, "version", version.Version)
ctx = ctxu.WithLogger(ctx, ctxu.GetLogger(ctx, "version"))
app := handlers.NewApp(ctx, *config)
handler := configureReporting(app)
handler = gorhandlers.CombinedLoggingHandler(os.Stdout, handler)
if config.HTTP.Debug.Addr != "" {
go debugServer(config.HTTP.Debug.Addr)
}
if config.HTTP.TLS.Certificate == "" {
ctxu.GetLogger(app).Infof("listening on %v", config.HTTP.Addr)
if err := http.ListenAndServe(config.HTTP.Addr, handler); err != nil {
ctxu.GetLogger(app).Fatalln(err)
}
} else {
ctxu.GetLogger(app).Infof("listening on %v, tls", config.HTTP.Addr)
if err := http.ListenAndServeTLS(config.HTTP.Addr, config.HTTP.TLS.Certificate, config.HTTP.TLS.Key, handler); err != nil {
ctxu.GetLogger(app).Fatalln(err)
}
}
}
func usage() {
fmt.Fprintln(os.Stderr, "usage:", os.Args[0], "<config>")
flag.PrintDefaults()
}
func fatalf(format string, args ...interface{}) {
fmt.Fprintf(os.Stderr, format+"\n", args...)
usage()
os.Exit(1)
}
func resolveConfiguration() (*configuration.Configuration, error) {
var configurationPath string
if flag.NArg() > 0 {
configurationPath = flag.Arg(0)
} else if os.Getenv("REGISTRY_CONFIGURATION_PATH") != "" {
configurationPath = os.Getenv("REGISTRY_CONFIGURATION_PATH")
}
if configurationPath == "" {
return nil, fmt.Errorf("configuration path unspecified")
}
fp, err := os.Open(configurationPath)
if err != nil {
return nil, err
}
config, err := configuration.Parse(fp)
if err != nil {
return nil, fmt.Errorf("error parsing %s: %v", configurationPath, err)
}
return config, nil
}
func logLevel(level configuration.Loglevel) log.Level {
l, err := log.ParseLevel(string(level))
if err != nil {
log.Warnf("error parsing level %q: %v", level, err)
l = log.InfoLevel
}
return l
}
func configureReporting(app *handlers.App) http.Handler {
var handler http.Handler = app
if app.Config.Reporting.Bugsnag.APIKey != "" {
bugsnagConfig := bugsnag.Configuration{
APIKey: app.Config.Reporting.Bugsnag.APIKey,
// TODO(brianbland): provide the registry version here
// AppVersion: "2.0",
}
if app.Config.Reporting.Bugsnag.ReleaseStage != "" {
bugsnagConfig.ReleaseStage = app.Config.Reporting.Bugsnag.ReleaseStage
}
if app.Config.Reporting.Bugsnag.Endpoint != "" {
bugsnagConfig.Endpoint = app.Config.Reporting.Bugsnag.Endpoint
}
bugsnag.Configure(bugsnagConfig)
handler = bugsnag.Handler(handler)
}
if app.Config.Reporting.NewRelic.LicenseKey != "" {
agent := gorelic.NewAgent()
agent.NewrelicLicense = app.Config.Reporting.NewRelic.LicenseKey
if app.Config.Reporting.NewRelic.Name != "" {
agent.NewrelicName = app.Config.Reporting.NewRelic.Name
}
agent.CollectHTTPStat = true
agent.Verbose = true
agent.Run()
handler = agent.WrapHTTPHandler(handler)
}
return handler
}
// debugServer starts the debug server with pprof, expvar among other
// endpoints. The addr should not be exposed externally. For most of these to
// work, tls cannot be enabled on the endpoint, so it is generally separate.
func debugServer(addr string) {
log.Infof("debug server listening %v", addr)
if err := http.ListenAndServe(addr, nil); err != nil {
log.Fatalf("error listening on debug interface: %v", err)
}
}