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

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package main
import (
"context"
"encoding/hex"
"math"
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"net"
"net/http"
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"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/internal/wallet"
"github.com/nspcc-dev/neofs-sdk-go/pkg/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 {
pool pool.Pool
ctr auth.Center
log *zap.Logger
cfg *viper.Viper
tls *tlsConfig
obj layer.Client
api api.Handler
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maxClients api.MaxClients
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webDone chan struct{}
wrkDone chan struct{}
}
tlsConfig struct {
KeyFile string
CertFile string
}
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)
func newApp(ctx context.Context, l *zap.Logger, v *viper.Viper) *App {
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var (
conns pool.Pool
key *keys.PrivateKey
err error
tls *tlsConfig
caller api.Handler
ctr auth.Center
obj layer.Client
poolPeers = fetchPeers(l, v)
reBalance = defaultRebalanceTimer
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conTimeout = defaultConnectTimeout
reqTimeout = defaultRequestTimeout
maxClientsCount = defaultMaxClientsCount
maxClientsDeadline = defaultMaxClientsDeadline
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)
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if v := v.GetDuration(cfgConnectTimeout); v > 0 {
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conTimeout = v
}
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if v := v.GetDuration(cfgRequestTimeout); v > 0 {
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reqTimeout = v
}
if v := v.GetInt(cfgMaxClientsCount); v > 0 {
maxClientsCount = v
}
if v := v.GetDuration(cfgMaxClientsDeadline); v > 0 {
maxClientsDeadline = v
}
if v := v.GetDuration(cfgRebalanceTimer); v > 0 {
reBalance = v
}
password := wallet.GetPassword(v, cfgWalletPassphrase)
if key, err = wallet.GetKeyFromPath(v.GetString(cfgWallet), v.GetString(cfgAddress), password); err != nil {
l.Fatal("could not load NeoFS private key", zap.Error(err))
}
if v.IsSet(cfgTLSKeyFile) && v.IsSet(cfgTLSCertFile) {
tls = &tlsConfig{
KeyFile: v.GetString(cfgTLSKeyFile),
CertFile: v.GetString(cfgTLSCertFile),
}
}
l.Info("using credentials",
zap.String("NeoFS", hex.EncodeToString(key.PublicKey().Bytes())))
opts := &pool.BuilderOptions{
Key: &key.PrivateKey,
NodeConnectionTimeout: conTimeout,
NodeRequestTimeout: reqTimeout,
ClientRebalanceInterval: reBalance,
SessionExpirationEpoch: math.MaxUint64,
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}
conns, err = poolPeers.Build(ctx, opts)
if err != nil {
l.Fatal("failed to create connection pool", zap.Error(err))
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}
cacheCfg := getCacheOptions(v, l)
// prepare object layer
obj = layer.NewLayer(l, conns, cacheCfg)
// prepare auth center
ctr = auth.New(conns, key)
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if caller, err = handler.New(l, obj); err != nil {
l.Fatal("could not initialize API handler", zap.Error(err))
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}
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return &App{
ctr: ctr,
pool: conns,
log: l,
cfg: v,
obj: obj,
tls: tls,
api: caller,
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webDone: make(chan struct{}, 1),
wrkDone: make(chan struct{}, 1),
maxClients: api.NewMaxClientsMiddleware(maxClientsCount, maxClientsDeadline),
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}
}
// Wait waits for application to finish.
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func (a *App) Wait() {
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a.log.Info("application started")
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<-a.webDone // wait for web-server to be stopped
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a.log.Info("application finished")
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}
// Server runs HTTP server to handle S3 API requests.
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func (a *App) Server(ctx context.Context) {
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var (
err error
lis net.Listener
lic net.ListenConfig
srv = new(http.Server)
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addr = a.cfg.GetString(cfgListenAddress)
)
if lis, err = lic.Listen(ctx, "tcp", addr); err != nil {
a.log.Fatal("could not prepare listener",
zap.Error(err))
}
router := newS3Router()
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// Attach app-specific routes:
// attachHealthy(router, a.cli)
attachMetrics(router, a.cfg, a.log)
attachProfiler(router, a.cfg, a.log)
// Attach S3 API:
domains := fetchDomains(a.cfg)
a.log.Info("fetch domains, prepare to use API",
zap.Strings("domains", domains))
api.Attach(router, domains, a.maxClients, a.api, a.ctr, a.log)
// Use mux.Router as http.Handler
srv.Handler = router
srv.ErrorLog = zap.NewStdLog(a.log)
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go func() {
a.log.Info("starting server",
zap.String("bind", addr))
switch a.tls {
case nil:
if err = srv.Serve(lis); err != nil && err != http.ErrServerClosed {
a.log.Fatal("listen and serve",
zap.Error(err))
}
default:
a.log.Info("using certificate",
zap.String("key", a.tls.KeyFile),
zap.String("cert", a.tls.CertFile))
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if err = srv.ServeTLS(lis, a.tls.CertFile, a.tls.KeyFile); 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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<-ctx.Done()
ctx, cancel := context.WithTimeout(context.Background(), defaultShutdownTimeout)
defer cancel()
a.log.Info("stopping server",
zap.Error(srv.Shutdown(ctx)))
close(a.webDone)
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}
func getCacheOptions(v *viper.Viper, l *zap.Logger) *layer.CacheConfig {
cacheCfg := layer.CacheConfig{
ListObjectsLifetime: layer.DefaultObjectsListCacheLifetime,
Size: cache.DefaultObjectsCacheSize,
Lifetime: cache.DefaultObjectsCacheLifetime,
}
if v.IsSet(cfgObjectsCacheLifetime) {
lifetime := v.GetDuration(cfgObjectsCacheLifetime)
if lifetime <= 0 {
l.Error("invalid cache lifetime, using default value (in seconds)",
zap.Duration("value in config", lifetime),
zap.Duration("default", cacheCfg.Lifetime))
} else {
cacheCfg.Lifetime = lifetime
}
}
if v.IsSet(cfgCacheSize) {
size := v.GetInt(cfgCacheSize)
if size <= 0 {
l.Error("invalid cache size, using default value",
zap.Int("value in config", size),
zap.Int("default", cacheCfg.Size))
} else {
cacheCfg.Size = size
}
}
if v.IsSet(cfgListObjectsCacheLifetime) {
lifetime := v.GetDuration(cfgListObjectsCacheLifetime)
if lifetime <= 0 {
l.Error("invalid list objects cache lifetime, using default value (in seconds)",
zap.Duration("value in config", lifetime),
zap.Duration("default", cacheCfg.ListObjectsLifetime))
} else {
cacheCfg.ListObjectsLifetime = lifetime
}
}
return &cacheCfg
}