frostfs-s3-gw/cmd/s3-gw/app.go

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package main
import (
"context"
"crypto/tls"
"encoding/hex"
"errors"
"fmt"
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"net"
"net/http"
"os"
"os/signal"
"strconv"
"sync"
"syscall"
"time"
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"github.com/gorilla/mux"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neofs-s3-gw/api"
"github.com/nspcc-dev/neofs-s3-gw/api/auth"
"github.com/nspcc-dev/neofs-s3-gw/api/cache"
"github.com/nspcc-dev/neofs-s3-gw/api/handler"
"github.com/nspcc-dev/neofs-s3-gw/api/layer"
"github.com/nspcc-dev/neofs-s3-gw/api/notifications"
"github.com/nspcc-dev/neofs-s3-gw/api/resolver"
"github.com/nspcc-dev/neofs-s3-gw/internal/neofs"
"github.com/nspcc-dev/neofs-s3-gw/internal/version"
"github.com/nspcc-dev/neofs-s3-gw/internal/wallet"
"github.com/nspcc-dev/neofs-sdk-go/pool"
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"github.com/spf13/viper"
"go.uber.org/zap"
)
type (
// App is the main application structure.
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App struct {
ctr auth.Center
log *zap.Logger
cfg *viper.Viper
pool *pool.Pool
key *keys.PrivateKey
nc *notifications.Controller
obj layer.Client
api api.Handler
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metrics *appMetrics
bucketResolver *resolver.BucketResolver
tlsProvider *certProvider
services []*Service
settings *appSettings
maxClients api.MaxClients
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webDone chan struct{}
wrkDone chan struct{}
}
appSettings struct {
LogLevel zap.AtomicLevel
}
Logger struct {
logger *zap.Logger
lvl zap.AtomicLevel
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}
certProvider struct {
Enabled bool
mu sync.RWMutex
certPath string
keyPath string
cert *tls.Certificate
}
appMetrics struct {
logger *zap.Logger
provider GateMetricsCollector
mu sync.RWMutex
enabled bool
}
GateMetricsCollector interface {
SetHealth(int32)
Unregister()
}
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)
func newApp(ctx context.Context, log *Logger, v *viper.Viper) *App {
conns, key := getPool(ctx, log.logger, v)
// prepare auth center
ctr := auth.New(neofs.NewAuthmateNeoFS(conns), key, v.GetStringSlice(cfgAllowedAccessKeyIDPrefixes), getAccessBoxCacheConfig(v, log.logger))
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app := &App{
ctr: ctr,
log: log.logger,
cfg: v,
pool: conns,
key: key,
webDone: make(chan struct{}, 1),
wrkDone: make(chan struct{}, 1),
maxClients: newMaxClients(v),
settings: &appSettings{LogLevel: log.lvl},
}
app.init(ctx)
return app
}
func (a *App) init(ctx context.Context) {
a.initHandlers(ctx)
a.initMetrics()
a.initTLSProvider()
}
func (a *App) initLayer(ctx context.Context) {
a.initResolver()
treeServiceEndpoint := a.cfg.GetString(cfgTreeServiceEndpoint)
treeService, err := neofs.NewTreeClient(treeServiceEndpoint, a.key)
if err != nil {
a.log.Fatal("failed to create tree service", zap.Error(err))
}
a.log.Info("init tree service", zap.String("endpoint", treeServiceEndpoint))
// prepare random key for anonymous requests
randomKey, err := keys.NewPrivateKey()
if err != nil {
a.log.Fatal("couldn't generate random key", zap.Error(err))
}
layerCfg := &layer.Config{
Caches: getCacheOptions(a.cfg, a.log),
AnonKey: layer.AnonymousKey{
Key: randomKey,
},
Resolver: a.bucketResolver,
TreeService: treeService,
}
// prepare object layer
a.obj = layer.NewLayer(a.log, neofs.NewNeoFS(a.pool), layerCfg)
if a.cfg.GetBool(cfgEnableNATS) {
nopts := getNotificationsOptions(a.cfg, a.log)
a.nc, err = notifications.NewController(nopts, a.log)
if err != nil {
a.log.Fatal("failed to enable notifications", zap.Error(err))
}
if err = a.obj.Initialize(ctx, a.nc); err != nil {
a.log.Fatal("couldn't initialize layer", zap.Error(err))
}
}
}
func (a *App) initHandlers(ctx context.Context) {
a.initLayer(ctx)
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var err error
handlerOptions := getHandlerOptions(a.cfg, a.log)
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a.api, err = handler.New(a.log, a.obj, a.nc, handlerOptions)
if err != nil {
a.log.Fatal("could not initialize API handler", zap.Error(err))
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}
}
func (a *App) initMetrics() {
gateMetricsProvider := newGateMetrics(neofs.NewPoolStatistic(a.pool))
a.metrics = newAppMetrics(a.log, gateMetricsProvider, a.cfg.GetBool(cfgPrometheusEnabled))
}
func (a *App) initResolver() {
var err error
a.bucketResolver, err = resolver.NewBucketResolver(a.getResolverConfig())
if err != nil {
a.log.Fatal("failed to create resolver", zap.Error(err))
}
}
func (a *App) initTLSProvider() {
a.tlsProvider = &certProvider{
Enabled: a.cfg.IsSet(cfgTLSCertFile) || a.cfg.IsSet(cfgTLSKeyFile),
}
}
func (a *App) getResolverConfig() ([]string, *resolver.Config) {
resolveCfg := &resolver.Config{
NeoFS: neofs.NewResolverNeoFS(a.pool),
RPCAddress: a.cfg.GetString(cfgRPCEndpoint),
}
order := a.cfg.GetStringSlice(cfgResolveOrder)
if resolveCfg.RPCAddress == "" {
order = remove(order, resolver.NNSResolver)
a.log.Warn(fmt.Sprintf("resolver '%s' won't be used since '%s' isn't provided", resolver.NNSResolver, cfgRPCEndpoint))
}
if len(order) == 0 {
a.log.Info("container resolver will be disabled because of resolvers 'resolver_order' is empty")
}
return order, resolveCfg
}
func newMaxClients(cfg *viper.Viper) api.MaxClients {
maxClientsCount := cfg.GetInt(cfgMaxClientsCount)
if maxClientsCount <= 0 {
maxClientsCount = defaultMaxClientsCount
}
maxClientsDeadline := cfg.GetDuration(cfgMaxClientsDeadline)
if maxClientsDeadline <= 0 {
maxClientsDeadline = defaultMaxClientsDeadline
}
return api.NewMaxClientsMiddleware(maxClientsCount, maxClientsDeadline)
}
func getPool(ctx context.Context, logger *zap.Logger, cfg *viper.Viper) (*pool.Pool, *keys.PrivateKey) {
var prm pool.InitParameters
password := wallet.GetPassword(cfg, cfgWalletPassphrase)
key, err := wallet.GetKeyFromPath(cfg.GetString(cfgWalletPath), cfg.GetString(cfgWalletAddress), password)
if err != nil {
logger.Fatal("could not load NeoFS private key", zap.Error(err))
}
prm.SetKey(&key.PrivateKey)
logger.Info("using credentials", zap.String("NeoFS", hex.EncodeToString(key.PublicKey().Bytes())))
for _, peer := range fetchPeers(logger, cfg) {
prm.AddNode(peer)
}
connTimeout := cfg.GetDuration(cfgConnectTimeout)
if connTimeout <= 0 {
connTimeout = defaultConnectTimeout
}
prm.SetNodeDialTimeout(connTimeout)
healthCheckTimeout := cfg.GetDuration(cfgHealthcheckTimeout)
if healthCheckTimeout <= 0 {
healthCheckTimeout = defaultHealthcheckTimeout
}
prm.SetNodeDialTimeout(healthCheckTimeout)
rebalanceInterval := cfg.GetDuration(cfgRebalanceInterval)
if rebalanceInterval <= 0 {
rebalanceInterval = defaultRebalanceInterval
}
prm.SetClientRebalanceInterval(rebalanceInterval)
errorThreshold := cfg.GetUint32(cfgPoolErrorThreshold)
if errorThreshold <= 0 {
errorThreshold = defaultPoolErrorThreshold
}
prm.SetErrorThreshold(errorThreshold)
p, err := pool.NewPool(prm)
if err != nil {
logger.Fatal("failed to create connection pool", zap.Error(err))
}
if err = p.Dial(ctx); err != nil {
logger.Fatal("failed to dial connection pool", zap.Error(err))
}
return p, key
}
func newAppMetrics(logger *zap.Logger, provider GateMetricsCollector, enabled bool) *appMetrics {
if !enabled {
logger.Warn("metrics are disabled")
}
return &appMetrics{
logger: logger,
provider: provider,
}
}
func (m *appMetrics) SetEnabled(enabled bool) {
if !enabled {
m.logger.Warn("metrics are disabled")
}
m.mu.Lock()
m.enabled = enabled
m.mu.Unlock()
}
func (m *appMetrics) SetHealth(status int32) {
m.mu.RLock()
if !m.enabled {
m.mu.RUnlock()
return
}
m.mu.RUnlock()
m.provider.SetHealth(status)
}
func (m *appMetrics) Shutdown() {
m.mu.Lock()
if m.enabled {
m.provider.SetHealth(0)
m.enabled = false
}
m.provider.Unregister()
m.mu.Unlock()
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}
func (p *certProvider) GetCertificate(*tls.ClientHelloInfo) (*tls.Certificate, error) {
if !p.Enabled {
return nil, errors.New("cert provider: disabled")
}
p.mu.RLock()
defer p.mu.RUnlock()
return p.cert, nil
}
func (p *certProvider) UpdateCert(certPath, keyPath string) error {
if !p.Enabled {
return fmt.Errorf("tls disabled")
}
cert, err := tls.LoadX509KeyPair(certPath, keyPath)
if err != nil {
return fmt.Errorf("cannot load TLS key pair from certFile '%s' and keyFile '%s': %w", certPath, keyPath, err)
}
p.mu.Lock()
p.certPath = certPath
p.keyPath = keyPath
p.cert = &cert
p.mu.Unlock()
return nil
}
func (p *certProvider) FilePaths() (string, string) {
if !p.Enabled {
return "", ""
}
p.mu.RLock()
defer p.mu.RUnlock()
return p.certPath, p.keyPath
}
func remove(list []string, element string) []string {
for i, item := range list {
if item == element {
return append(list[:i], list[i+1:]...)
}
}
return list
}
// Wait waits for an application to finish.
//
// Pre-logs a message about the launch of the application mentioning its
// version (version.Version) and its name (neofs-s3-gw). At the end, it writes
// about the stop to the log.
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func (a *App) Wait() {
a.log.Info("application started",
zap.String("name", "neofs-s3-gw"),
zap.String("version", version.Version),
)
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a.setHealthStatus()
<-a.webDone // wait for web-server to be stopped
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a.log.Info("application finished")
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}
func (a *App) setHealthStatus() {
a.metrics.SetHealth(1)
}
// Serve runs HTTP server to handle S3 API requests.
func (a *App) Serve(ctx context.Context) {
// Attach S3 API:
domains := a.cfg.GetStringSlice(cfgListenDomains)
a.log.Info("fetch domains, prepare to use API", zap.Strings("domains", domains))
router := mux.NewRouter().SkipClean(true).UseEncodedPath()
api.Attach(router, domains, a.maxClients, a.api, a.ctr, a.log)
// Use mux.Router as http.Handler
srv := new(http.Server)
srv.Handler = router
srv.ErrorLog = zap.NewStdLog(a.log)
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a.startServices()
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go func() {
addr := a.cfg.GetString(cfgListenAddress)
a.log.Info("starting server", zap.String("bind", addr))
var lic net.ListenConfig
ln, err := lic.Listen(ctx, "tcp", addr)
if err != nil {
a.log.Fatal("could not prepare listener", zap.Error(err))
}
if a.tlsProvider.Enabled {
certFile := a.cfg.GetString(cfgTLSCertFile)
keyFile := a.cfg.GetString(cfgTLSKeyFile)
a.log.Info("using certificate", zap.String("cert", certFile), zap.String("key", keyFile))
if err = a.tlsProvider.UpdateCert(certFile, keyFile); err != nil {
a.log.Fatal("failed to update cert", zap.Error(err))
}
lnTLS := tls.NewListener(ln, &tls.Config{
GetCertificate: a.tlsProvider.GetCertificate,
})
if err = srv.ServeTLS(lnTLS, certFile, keyFile); err != nil && err != http.ErrServerClosed {
a.log.Fatal("listen and serve", zap.Error(err))
}
} else {
if err = srv.Serve(ln); err != nil && err != http.ErrServerClosed {
a.log.Fatal("listen and serve", zap.Error(err))
}
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}
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}()
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sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGHUP)
LOOP:
for {
select {
case <-ctx.Done():
break LOOP
case <-sigs:
a.configReload()
}
}
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ctx, cancel := shutdownContext()
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defer cancel()
a.log.Info("stopping server", zap.Error(srv.Shutdown(ctx)))
a.metrics.Shutdown()
a.stopServices()
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close(a.webDone)
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}
func shutdownContext() (context.Context, context.CancelFunc) {
return context.WithTimeout(context.Background(), defaultShutdownTimeout)
}
func (a *App) configReload() {
a.log.Info("SIGHUP config reload started")
if !a.cfg.IsSet(cmdConfig) {
a.log.Warn("failed to reload config because it's missed")
return
}
if err := readConfig(a.cfg); err != nil {
a.log.Warn("failed to reload config", zap.Error(err))
return
}
if err := a.bucketResolver.UpdateResolvers(a.getResolverConfig()); err != nil {
a.log.Warn("failed to reload resolvers", zap.Error(err))
}
if err := a.tlsProvider.UpdateCert(a.cfg.GetString(cfgTLSCertFile), a.cfg.GetString(cfgTLSKeyFile)); err != nil {
a.log.Warn("failed to reload TLS certs", zap.Error(err))
}
a.stopServices()
a.startServices()
a.updateSettings()
a.metrics.SetEnabled(a.cfg.GetBool(cfgPrometheusEnabled))
a.setHealthStatus()
a.log.Info("SIGHUP config reload completed")
}
func (a *App) updateSettings() {
if lvl, err := getLogLevel(a.cfg); err != nil {
a.log.Warn("log level won't be updated", zap.Error(err))
} else {
a.settings.LogLevel.SetLevel(lvl)
}
}
func (a *App) startServices() {
pprofService := NewPprofService(a.cfg, a.log)
a.services = append(a.services, pprofService)
go pprofService.Start()
prometheusService := NewPrometheusService(a.cfg, a.log)
a.services = append(a.services, prometheusService)
go prometheusService.Start()
}
func (a *App) stopServices() {
ctx, cancel := shutdownContext()
defer cancel()
for _, svc := range a.services {
svc.ShutDown(ctx)
}
}
func getNotificationsOptions(v *viper.Viper, l *zap.Logger) *notifications.Options {
cfg := notifications.Options{}
cfg.URL = v.GetString(cfgNATSEndpoint)
cfg.Timeout = v.GetDuration(cfgNATSTimeout)
if cfg.Timeout <= 0 {
l.Error("invalid lifetime, using default value (in seconds)",
zap.String("parameter", cfgNATSTimeout),
zap.Duration("value in config", cfg.Timeout),
zap.Duration("default", notifications.DefaultTimeout))
cfg.Timeout = notifications.DefaultTimeout
}
cfg.TLSCertFilepath = v.GetString(cfgNATSTLSCertFile)
cfg.TLSAuthPrivateKeyFilePath = v.GetString(cfgNATSAuthPrivateKeyFile)
cfg.RootCAFiles = v.GetStringSlice(cfgNATSRootCAFiles)
return &cfg
}
func getCacheOptions(v *viper.Viper, l *zap.Logger) *layer.CachesConfig {
cacheCfg := layer.DefaultCachesConfigs(l)
cacheCfg.Objects.Lifetime = getLifetime(v, l, cfgObjectsCacheLifetime, cacheCfg.Objects.Lifetime)
cacheCfg.Objects.Size = getSize(v, l, cfgObjectsCacheSize, cacheCfg.Objects.Size)
cacheCfg.ObjectsList.Lifetime = getLifetime(v, l, cfgListObjectsCacheLifetime, cacheCfg.ObjectsList.Lifetime)
cacheCfg.ObjectsList.Size = getSize(v, l, cfgListObjectsCacheSize, cacheCfg.ObjectsList.Size)
cacheCfg.Buckets.Lifetime = getLifetime(v, l, cfgBucketsCacheLifetime, cacheCfg.Buckets.Lifetime)
cacheCfg.Buckets.Size = getSize(v, l, cfgBucketsCacheSize, cacheCfg.Buckets.Size)
cacheCfg.Names.Lifetime = getLifetime(v, l, cfgNamesCacheLifetime, cacheCfg.Names.Lifetime)
cacheCfg.Names.Size = getSize(v, l, cfgNamesCacheSize, cacheCfg.Names.Size)
cacheCfg.System.Lifetime = getLifetime(v, l, cfgSystemLifetimeSize, cacheCfg.System.Lifetime)
cacheCfg.System.Size = getSize(v, l, cfgSystemCacheSize, cacheCfg.System.Size)
return cacheCfg
}
func getLifetime(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultValue time.Duration) time.Duration {
if v.IsSet(cfgEntry) {
lifetime := v.GetDuration(cfgEntry)
if lifetime <= 0 {
l.Error("invalid lifetime, using default value (in seconds)",
zap.String("parameter", cfgEntry),
zap.Duration("value in config", lifetime),
zap.Duration("default", defaultValue))
} else {
return lifetime
}
}
return defaultValue
}
func getSize(v *viper.Viper, l *zap.Logger, cfgEntry string, defaultValue int) int {
if v.IsSet(cfgEntry) {
size := v.GetInt(cfgEntry)
if size <= 0 {
l.Error("invalid cache size, using default value",
zap.String("parameter", cfgEntry),
zap.Int("value in config", size),
zap.Int("default", defaultValue))
} else {
return size
}
}
return defaultValue
}
func getAccessBoxCacheConfig(v *viper.Viper, l *zap.Logger) *cache.Config {
cacheCfg := cache.DefaultAccessBoxConfig(l)
cacheCfg.Lifetime = getLifetime(v, l, cfgAccessBoxCacheLifetime, cacheCfg.Lifetime)
cacheCfg.Size = getSize(v, l, cfgAccessBoxCacheSize, cacheCfg.Size)
return cacheCfg
}
func getHandlerOptions(v *viper.Viper, l *zap.Logger) *handler.Config {
var (
cfg handler.Config
err error
policyStr = handler.DefaultPolicy
defaultMaxAge = handler.DefaultMaxAge
setCopiesNumber = handler.DefaultCopiesNumber
)
if v.IsSet(cfgDefaultPolicy) {
policyStr = v.GetString(cfgDefaultPolicy)
}
if err = cfg.DefaultPolicy.DecodeString(policyStr); err != nil {
l.Fatal("couldn't parse container default policy",
zap.Error(err))
}
if v.IsSet(cfgDefaultMaxAge) {
defaultMaxAge = v.GetInt(cfgDefaultMaxAge)
if defaultMaxAge <= 0 && defaultMaxAge != -1 {
l.Fatal("invalid defaultMaxAge",
zap.String("parameter", cfgDefaultMaxAge),
zap.String("value in config", strconv.Itoa(defaultMaxAge)))
}
}
if val := v.GetUint32(cfgSetCopiesNumber); val > 0 {
setCopiesNumber = val
}
cfg.DefaultMaxAge = defaultMaxAge
cfg.NotificatorEnabled = v.GetBool(cfgEnableNATS)
cfg.TLSEnabled = v.IsSet(cfgTLSKeyFile) && v.IsSet(cfgTLSCertFile)
cfg.CopiesNumber = setCopiesNumber
return &cfg
}