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

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package main
import (
"context"
"crypto/ecdsa"
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"net"
"net/http"
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"time"
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"github.com/minio/minio/auth"
"github.com/minio/minio/neofs/api"
"github.com/minio/minio/neofs/api/handler"
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"github.com/minio/minio/neofs/layer"
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"github.com/minio/minio/neofs/pool"
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"github.com/spf13/viper"
"go.uber.org/zap"
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"google.golang.org/grpc/keepalive"
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)
type (
App struct {
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center *auth.Center
cli pool.Pool
log *zap.Logger
cfg *viper.Viper
tls *tlsConfig
obj layer.Client
api api.Handler
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conTimeout time.Duration
reqTimeout time.Duration
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reBalance time.Duration
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(l *zap.Logger, v *viper.Viper) *App {
var (
err error
cli pool.Pool
tls *tlsConfig
caller api.Handler
obj layer.Client
key *ecdsa.PrivateKey
reBalance = defaultRebalanceTimer
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conTimeout = defaultConnectTimeout
reqTimeout = defaultRequestTimeout
maxClientsCount = defaultMaxClientsCount
maxClientsDeadline = defaultMaxClientsDeadline
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)
center, err := fetchAuthCenter(l, v)
if err != nil {
l.Fatal("failed to initialize auth center", zap.Error(err))
}
key = center.GetNeoFSPrivateKey()
if v.IsSet(cfgTLSKeyFile) && v.IsSet(cfgTLSCertFile) {
tls = &tlsConfig{
KeyFile: v.GetString(cfgTLSKeyFile),
CertFile: v.GetString(cfgTLSCertFile),
}
}
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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
}
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poolConfig := &pool.Config{
ConnectionTTL: v.GetDuration(cfgConnectionTTL),
ConnectTimeout: v.GetDuration(cfgConnectTimeout),
RequestTimeout: v.GetDuration(cfgRequestTimeout),
Peers: fetchPeers(l, v),
Logger: l,
PrivateKey: key,
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GRPCLogger: gRPCLogger(l),
GRPCVerbose: v.GetBool(cfgGRPCVerbose),
ClientParameters: keepalive.ClientParameters{},
}
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if v := v.GetDuration(cfgRebalanceTimer); v > 0 {
reBalance = v
}
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if cli, err = pool.New(poolConfig); err != nil {
l.Fatal("could not prepare pool connections", zap.Error(err))
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}
{ // should establish connection with NeoFS Storage Nodes
ctx, cancel := context.WithTimeout(context.Background(), conTimeout)
defer cancel()
cli.ReBalance(ctx)
if _, err = cli.GetConnection(ctx); err != nil {
l.Fatal("could not establish connection",
zap.Error(err))
}
}
if obj, err = layer.NewLayer(l, cli, key); err != nil {
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l.Fatal("could not prepare ObjectLayer", zap.Error(err))
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}
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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{
center: center,
cli: cli,
log: l,
cfg: v,
obj: obj,
tls: tls,
api: caller,
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webDone: make(chan struct{}, 1),
wrkDone: make(chan struct{}, 1),
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reBalance: reBalance,
maxClients: api.NewMaxClientsMiddleware(maxClientsCount, maxClientsDeadline),
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conTimeout: conTimeout,
reqTimeout: reqTimeout,
}
}
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func (a *App) Wait() {
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a.log.Info("application started")
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select {
case <-a.wrkDone: // wait for worker is stopped
<-a.webDone
case <-a.webDone: // wait for web-server is stopped
<-a.wrkDone
}
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a.log.Info("application finished")
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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:
api.Attach(router, a.maxClients, a.api, a.center, a.log)
// Use mux.Router as http.Handler
srv.Handler = router
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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 (a *App) Worker(ctx context.Context) {
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tick := time.NewTimer(a.reBalance)
loop:
for {
select {
case <-ctx.Done():
break loop
case <-tick.C:
ctx, cancel := context.WithTimeout(ctx, a.conTimeout)
a.cli.ReBalance(ctx)
cancel()
tick.Reset(a.reBalance)
}
}
tick.Stop()
a.cli.Close()
a.log.Info("stopping worker")
close(a.wrkDone)
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}