frostfs-http-gw/app.go

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package main
import (
"context"
"crypto/ecdsa"
"fmt"
"net/http"
"os"
"os/signal"
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"strconv"
"sync"
"syscall"
"time"
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"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/pkg/tracing"
"git.frostfs.info/TrueCloudLab/frostfs-http-gw/downloader"
"git.frostfs.info/TrueCloudLab/frostfs-http-gw/metrics"
"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
"git.frostfs.info/TrueCloudLab/frostfs-http-gw/uploader"
"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
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"github.com/fasthttp/router"
"github.com/nspcc-dev/neo-go/cli/flags"
"github.com/nspcc-dev/neo-go/cli/input"
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
"github.com/nspcc-dev/neo-go/pkg/util"
"github.com/nspcc-dev/neo-go/pkg/wallet"
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"github.com/spf13/viper"
"github.com/valyala/fasthttp"
"go.uber.org/zap"
)
type (
app struct {
log *zap.Logger
logLevel zap.AtomicLevel
pool *pool.Pool
owner *user.ID
cfg *viper.Viper
webServer *fasthttp.Server
webDone chan struct{}
resolver *resolver.ContainerResolver
metrics *gateMetrics
services []*metrics.Service
settings *appSettings
servers []Server
}
appSettings struct {
Uploader *uploader.Settings
Downloader *downloader.Settings
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}
// App is an interface for the main gateway function.
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App interface {
Wait()
Serve(context.Context)
}
// Option is an application option.
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Option func(a *app)
gateMetrics struct {
logger *zap.Logger
provider *metrics.GateMetrics
mu sync.RWMutex
enabled bool
}
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)
// WithLogger returns Option to set a specific logger.
func WithLogger(l *zap.Logger, lvl zap.AtomicLevel) Option {
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return func(a *app) {
if l == nil {
return
}
a.log = l
a.logLevel = lvl
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}
}
// WithConfig returns Option to use specific Viper configuration.
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func WithConfig(c *viper.Viper) Option {
return func(a *app) {
if c == nil {
return
}
a.cfg = c
}
}
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func newApp(ctx context.Context, opt ...Option) App {
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var (
key *ecdsa.PrivateKey
err error
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)
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a := &app{
log: zap.L(),
cfg: viper.GetViper(),
webServer: new(fasthttp.Server),
webDone: make(chan struct{}),
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}
for i := range opt {
opt[i](a)
}
// -- setup FastHTTP server --
a.webServer.Name = "frost-http-gw"
a.webServer.ReadBufferSize = a.cfg.GetInt(cfgWebReadBufferSize)
a.webServer.WriteBufferSize = a.cfg.GetInt(cfgWebWriteBufferSize)
a.webServer.ReadTimeout = a.cfg.GetDuration(cfgWebReadTimeout)
a.webServer.WriteTimeout = a.cfg.GetDuration(cfgWebWriteTimeout)
a.webServer.DisableHeaderNamesNormalizing = true
a.webServer.NoDefaultServerHeader = true
a.webServer.NoDefaultContentType = true
a.webServer.MaxRequestBodySize = a.cfg.GetInt(cfgWebMaxRequestBodySize)
a.webServer.DisablePreParseMultipartForm = true
a.webServer.StreamRequestBody = a.cfg.GetBool(cfgWebStreamRequestBody)
// -- -- -- -- -- -- -- -- -- -- -- -- -- --
key, err = getFrostFSKey(a)
if err != nil {
a.log.Fatal("failed to get frostfs credentials", zap.Error(err))
}
var owner user.ID
user.IDFromKey(&owner, key.PublicKey)
a.owner = &owner
var prm pool.InitParameters
prm.SetKey(key)
prm.SetNodeDialTimeout(a.cfg.GetDuration(cfgConTimeout))
prm.SetNodeStreamTimeout(a.cfg.GetDuration(cfgStreamTimeout))
prm.SetHealthcheckTimeout(a.cfg.GetDuration(cfgReqTimeout))
prm.SetClientRebalanceInterval(a.cfg.GetDuration(cfgRebalance))
prm.SetErrorThreshold(a.cfg.GetUint32(cfgPoolErrorThreshold))
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for i := 0; ; i++ {
address := a.cfg.GetString(cfgPeers + "." + strconv.Itoa(i) + ".address")
weight := a.cfg.GetFloat64(cfgPeers + "." + strconv.Itoa(i) + ".weight")
priority := a.cfg.GetInt(cfgPeers + "." + strconv.Itoa(i) + ".priority")
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if address == "" {
break
}
if weight <= 0 { // unspecified or wrong
weight = 1
}
if priority <= 0 { // unspecified or wrong
priority = 1
}
prm.AddNode(pool.NewNodeParam(priority, address, weight))
a.log.Info("add connection", zap.String("address", address),
zap.Float64("weight", weight), zap.Int("priority", priority))
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}
a.pool, err = pool.NewPool(prm)
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if err != nil {
a.log.Fatal("failed to create connection pool", zap.Error(err))
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}
err = a.pool.Dial(ctx)
if err != nil {
a.log.Fatal("failed to dial pool", zap.Error(err))
}
a.initAppSettings()
a.initResolver()
a.initMetrics()
a.initTracing(ctx)
return a
}
func (a *app) initAppSettings() {
a.settings = &appSettings{
Uploader: &uploader.Settings{},
Downloader: &downloader.Settings{},
}
a.updateSettings()
}
func (a *app) initResolver() {
var err error
a.resolver, err = resolver.NewContainerResolver(a.getResolverConfig())
if err != nil {
a.log.Fatal("failed to create resolver", zap.Error(err))
}
}
func (a *app) getResolverConfig() ([]string, *resolver.Config) {
resolveCfg := &resolver.Config{
FrostFS: resolver.NewFrostFSResolver(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
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}
func (a *app) initMetrics() {
gateMetricsProvider := metrics.NewGateMetrics(a.pool)
a.metrics = newGateMetrics(a.log, gateMetricsProvider, a.cfg.GetBool(cfgPrometheusEnabled))
a.metrics.SetHealth(metrics.HealthStatusStarting)
}
func newGateMetrics(logger *zap.Logger, provider *metrics.GateMetrics, enabled bool) *gateMetrics {
if !enabled {
logger.Warn("metrics are disabled")
}
return &gateMetrics{
logger: logger,
provider: provider,
enabled: enabled,
}
}
func (m *gateMetrics) SetEnabled(enabled bool) {
if !enabled {
m.logger.Warn("metrics are disabled")
}
m.mu.Lock()
m.enabled = enabled
m.mu.Unlock()
}
func (m *gateMetrics) SetHealth(status metrics.HealthStatus) {
m.mu.RLock()
if !m.enabled {
m.mu.RUnlock()
return
}
m.mu.RUnlock()
m.provider.SetHealth(status)
}
func (m *gateMetrics) SetVersion(ver string) {
m.mu.RLock()
if !m.enabled {
m.mu.RUnlock()
return
}
m.mu.RUnlock()
m.provider.SetVersion(ver)
}
func (m *gateMetrics) Shutdown() {
m.mu.Lock()
if m.enabled {
m.provider.SetHealth(metrics.HealthStatusShuttingDown)
m.enabled = false
}
m.provider.Unregister()
m.mu.Unlock()
}
func remove(list []string, element string) []string {
for i, item := range list {
if item == element {
return append(list[:i], list[i+1:]...)
}
}
return list
}
func getFrostFSKey(a *app) (*ecdsa.PrivateKey, error) {
walletPath := a.cfg.GetString(cfgWalletPath)
if len(walletPath) == 0 {
a.log.Info("no wallet path specified, creating ephemeral key automatically for this run")
key, err := keys.NewPrivateKey()
if err != nil {
return nil, err
}
return &key.PrivateKey, nil
}
w, err := wallet.NewWalletFromFile(walletPath)
if err != nil {
return nil, err
}
var password *string
if a.cfg.IsSet(cfgWalletPassphrase) {
pwd := a.cfg.GetString(cfgWalletPassphrase)
password = &pwd
}
address := a.cfg.GetString(cfgWalletAddress)
return getKeyFromWallet(w, address, password)
}
func getKeyFromWallet(w *wallet.Wallet, addrStr string, password *string) (*ecdsa.PrivateKey, error) {
var addr util.Uint160
var err error
if addrStr == "" {
addr = w.GetChangeAddress()
} else {
addr, err = flags.ParseAddress(addrStr)
if err != nil {
return nil, fmt.Errorf("invalid address")
}
}
acc := w.GetAccount(addr)
if acc == nil {
return nil, fmt.Errorf("couldn't find wallet account for %s", addrStr)
}
if password == nil {
pwd, err := input.ReadPassword("Enter password > ")
if err != nil {
return nil, fmt.Errorf("couldn't read password")
}
password = &pwd
}
if err := acc.Decrypt(*password, w.Scrypt); err != nil {
return nil, fmt.Errorf("couldn't decrypt account: %w", err)
}
return &acc.PrivateKey().PrivateKey, nil
}
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func (a *app) Wait() {
a.log.Info("starting application", zap.String("app_name", "frostfs-http-gw"), zap.String("version", Version))
a.metrics.SetVersion(Version)
a.setHealthStatus()
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<-a.webDone // wait for web-server to be stopped
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}
func (a *app) setHealthStatus() {
a.metrics.SetHealth(metrics.HealthStatusReady)
}
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func (a *app) Serve(ctx context.Context) {
uploadRoutes := uploader.New(ctx, a.AppParams(), a.settings.Uploader)
downloadRoutes := downloader.New(ctx, a.AppParams(), a.settings.Downloader)
// Configure router.
a.configureRouter(uploadRoutes, downloadRoutes)
a.startServices()
a.initServers(ctx)
for i := range a.servers {
go func(i int) {
a.log.Info("starting server", zap.String("address", a.servers[i].Address()))
if err := a.webServer.Serve(a.servers[i].Listener()); err != nil && err != http.ErrServerClosed {
a.log.Fatal("listen and serve", zap.Error(err))
}
}(i)
}
sigs := make(chan os.Signal, 1)
signal.Notify(sigs, syscall.SIGHUP)
LOOP:
for {
select {
case <-ctx.Done():
break LOOP
case <-sigs:
a.configReload(ctx)
}
}
a.log.Info("shutting down web server", zap.Error(a.webServer.Shutdown()))
a.metrics.Shutdown()
a.stopServices()
a.shutdownTracing()
close(a.webDone)
}
func (a *app) shutdownTracing() {
const tracingShutdownTimeout = 5 * time.Second
shdnCtx, cancel := context.WithTimeout(context.Background(), tracingShutdownTimeout)
defer cancel()
if err := tracing.Shutdown(shdnCtx); err != nil {
a.log.Warn("failed to shutdown tracing", zap.Error(err))
}
}
func (a *app) configReload(ctx context.Context) {
a.log.Info("SIGHUP config reload started")
if !a.cfg.IsSet(cmdConfig) && !a.cfg.IsSet(cmdConfigDir) {
a.log.Warn("failed to reload config because it's missed")
return
}
if err := readInConfig(a.cfg); err != nil {
a.log.Warn("failed to reload config", zap.Error(err))
return
}
if lvl, err := getLogLevel(a.cfg); err != nil {
a.log.Warn("log level won't be updated", zap.Error(err))
} else {
a.logLevel.SetLevel(lvl)
}
if err := a.resolver.UpdateResolvers(a.getResolverConfig()); err != nil {
a.log.Warn("failed to update resolvers", zap.Error(err))
}
if err := a.updateServers(); err != nil {
a.log.Warn("failed to reload server parameters", zap.Error(err))
}
a.stopServices()
a.startServices()
a.updateSettings()
a.metrics.SetEnabled(a.cfg.GetBool(cfgPrometheusEnabled))
a.initTracing(ctx)
a.setHealthStatus()
a.log.Info("SIGHUP config reload completed")
}
func (a *app) updateSettings() {
a.settings.Uploader.SetDefaultTimestamp(a.cfg.GetBool(cfgUploaderHeaderEnableDefaultTimestamp))
a.settings.Downloader.SetZipCompression(a.cfg.GetBool(cfgZipCompression))
}
func (a *app) startServices() {
pprofConfig := metrics.Config{Enabled: a.cfg.GetBool(cfgPprofEnabled), Address: a.cfg.GetString(cfgPprofAddress)}
pprofService := metrics.NewPprofService(a.log, pprofConfig)
a.services = append(a.services, pprofService)
go pprofService.Start()
prometheusConfig := metrics.Config{Enabled: a.cfg.GetBool(cfgPrometheusEnabled), Address: a.cfg.GetString(cfgPrometheusAddress)}
prometheusService := metrics.NewPrometheusService(a.log, prometheusConfig)
a.services = append(a.services, prometheusService)
go prometheusService.Start()
}
func (a *app) stopServices() {
ctx, cancel := context.WithTimeout(context.Background(), defaultShutdownTimeout)
defer cancel()
for _, svc := range a.services {
svc.ShutDown(ctx)
}
}
func (a *app) configureRouter(uploadRoutes *uploader.Uploader, downloadRoutes *downloader.Downloader) {
r := router.New()
r.RedirectTrailingSlash = true
r.NotFound = func(r *fasthttp.RequestCtx) {
response.Error(r, "Not found", fasthttp.StatusNotFound)
}
r.MethodNotAllowed = func(r *fasthttp.RequestCtx) {
response.Error(r, "Method Not Allowed", fasthttp.StatusMethodNotAllowed)
}
r.POST("/upload/{cid}", a.logger(uploadRoutes.Upload))
a.log.Info("added path /upload/{cid}")
r.GET("/get/{cid}/{oid}", a.logger(downloadRoutes.DownloadByAddress))
r.HEAD("/get/{cid}/{oid}", a.logger(downloadRoutes.HeadByAddress))
a.log.Info("added path /get/{cid}/{oid}")
r.GET("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(downloadRoutes.DownloadByAttribute))
r.HEAD("/get_by_attribute/{cid}/{attr_key}/{attr_val:*}", a.logger(downloadRoutes.HeadByAttribute))
a.log.Info("added path /get_by_attribute/{cid}/{attr_key}/{attr_val:*}")
r.GET("/zip/{cid}/{prefix:*}", a.logger(downloadRoutes.DownloadZipped))
a.log.Info("added path /zip/{cid}/{prefix}")
a.webServer.Handler = r.Handler
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}
func (a *app) logger(h fasthttp.RequestHandler) fasthttp.RequestHandler {
return func(ctx *fasthttp.RequestCtx) {
a.log.Info("request", zap.String("remote", ctx.RemoteAddr().String()),
zap.ByteString("method", ctx.Method()),
zap.ByteString("path", ctx.Path()),
zap.ByteString("query", ctx.QueryArgs().QueryString()),
zap.Uint64("id", ctx.ID()))
h(ctx)
}
}
func (a *app) AppParams() *utils.AppParams {
return &utils.AppParams{
Logger: a.log,
Pool: a.pool,
Owner: a.owner,
Resolver: a.resolver,
}
}
func (a *app) initServers(ctx context.Context) {
serversInfo := fetchServers(a.cfg)
a.servers = make([]Server, 0, len(serversInfo))
for _, serverInfo := range serversInfo {
fields := []zap.Field{
zap.String("address", serverInfo.Address), zap.Bool("tls enabled", serverInfo.TLS.Enabled),
zap.String("tls cert", serverInfo.TLS.CertFile), zap.String("tls key", serverInfo.TLS.KeyFile),
}
srv, err := newServer(ctx, serverInfo)
if err != nil {
a.log.Warn("failed to add server", append(fields, zap.Error(err))...)
continue
}
a.servers = append(a.servers, srv)
a.log.Info("add server", fields...)
}
if len(a.servers) == 0 {
a.log.Fatal("no healthy servers")
}
}
func (a *app) updateServers() error {
serversInfo := fetchServers(a.cfg)
var found bool
for _, serverInfo := range serversInfo {
index := a.serverIndex(serverInfo.Address)
if index == -1 {
continue
}
if serverInfo.TLS.Enabled {
if err := a.servers[index].UpdateCert(serverInfo.TLS.CertFile, serverInfo.TLS.KeyFile); err != nil {
return fmt.Errorf("failed to update tls certs: %w", err)
}
}
found = true
}
if !found {
return fmt.Errorf("invalid servers configuration: no known server found")
}
return nil
}
func (a *app) serverIndex(address string) int {
for i := range a.servers {
if a.servers[i].Address() == address {
return i
}
}
return -1
}
func (a *app) initTracing(ctx context.Context) {
instanceID := ""
if len(a.servers) > 0 {
instanceID = a.servers[0].Address()
}
cfg := tracing.Config{
Enabled: a.cfg.GetBool(cfgTracingEnabled),
Exporter: tracing.Exporter(a.cfg.GetString(cfgTracingExporter)),
Endpoint: a.cfg.GetString(cfgTracingEndpoint),
Service: "frostfs-http-gw",
InstanceID: instanceID,
Version: Version,
}
updated, err := tracing.Setup(ctx, cfg)
if err != nil {
a.log.Warn("failed to initialize tracing", zap.Error(err))
}
if updated {
a.log.Info("tracing config updated")
}
}