Merge pull request 'Mise en place de cache local au niveau du serveur pour améliorer les temps de traitement des requêtes' (#26) from benchmark into develop

Reviewed-on: #26

.gitignore

@@ -9,3 +9,5 @@
 /data
 /out
 .dockerconfigjson
+*.prof
+proxy.test

Makefile

@@ -130,6 +130,13 @@ tools/grafterm/bin/grafterm:
 	mkdir -p tools/grafterm/bin
 	GOBIN=$(PWD)/tools/grafterm/bin go install github.com/slok/grafterm/cmd/grafterm@v0.2.0
 
+bench:
+	go test -bench=. -run '^$$' -count=10 ./...
+
+tools/benchstat/bin/benchstat:
+	mkdir -p tools/benchstat/bin
+	GOBIN=$(PWD)/tools/benchstat/bin go install golang.org/x/perf/cmd/benchstat@latest
+
 full-version:
 	@echo $(FULL_VERSION)
 

doc/fr/tutorials/profiling.md

@@ -0,0 +1,31 @@
+# Analyser les performances de Bouncer
+
+1. Lancer un benchmark du proxy
+
+   ```shell
+   go test -bench=. -run '^$' -count=5 -cpuprofile bench_proxy.prof ./internal/proxy
+   ```
+
+2. Visualiser les temps d'exécution
+
+   ```shell
+   go tool pprof -web bench_proxy.prof
+   ```
+
+3. Comparer les performances d'une exécution à l'autre
+
+   ```shell
+   # Lancer un premier benchmark
+   go test -bench=. -run '^$' -count=10 ./internal/proxy > bench_before.txt
+
+   # Faire des modifications sur les sources
+
+   # Lancer un second benchmark
+   go test -bench=. -run '^$' -count=10 ./internal/proxy > bench_after.txt
+
+   # Installer l'outil benchstat
+   make tools/benchstat/bin/benchstat
+
+   # Comparer les rapports
+   tools/benchstat/bin/benchstat bench_before.txt bench_after.txt
+   ```

go.mod

@@ -93,6 +93,7 @@ require (
 	go.opentelemetry.io/otel v1.21.0 // indirect
 	go.opentelemetry.io/otel/trace v1.21.0 // indirect
 	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/sync v0.7.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
 	google.golang.org/appengine v1.6.8 // indirect

go.sum

@@ -405,8 +405,8 @@ golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
-golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

internal/cache/cache.go

@@ -0,0 +1,6 @@
+package cache
+
+type Cache[K comparable, V any] interface {
+	Get(key K) (V, bool)
+	Set(key K, value V)
+}

internal/cache/memory/cache.go

@@ -0,0 +1,34 @@
+package memory
+
+import (
+	"sync"
+
+	cache "forge.cadoles.com/cadoles/bouncer/internal/cache"
+)
+
+type Cache[K comparable, V any] struct {
+	store *sync.Map
+}
+
+// Get implements cache.Cache.
+func (c *Cache[K, V]) Get(key K) (V, bool) {
+	raw, exists := c.store.Load(key)
+	if !exists {
+		return *new(V), false
+	}
+
+	return raw.(V), exists
+}
+
+// Set implements cache.Cache.
+func (c *Cache[K, V]) Set(key K, value V) {
+	c.store.Store(key, value)
+}
+
+func NewCache[K comparable, V any]() *Cache[K, V] {
+	return &Cache[K, V]{
+		store: new(sync.Map),
+	}
+}
+
+var _ cache.Cache[string, bool] = &Cache[string, bool]{}

internal/cache/ttl/cache.go

@@ -0,0 +1,39 @@
+package ttl
+
+import (
+	"time"
+
+	cache "forge.cadoles.com/cadoles/bouncer/internal/cache"
+)
+
+type Cache[K comparable, V any] struct {
+	timestamps cache.Cache[K, time.Time]
+	values     cache.Cache[K, V]
+	ttl        time.Duration
+}
+
+// Get implements cache.Cache.
+func (c *Cache[K, V]) Get(key K) (V, bool) {
+	timestamp, exists := c.timestamps.Get(key)
+	if !exists || timestamp.Add(c.ttl).Before(time.Now()) {
+		return *new(V), false
+	}
+
+	return c.values.Get(key)
+}
+
+// Set implements cache.Cache.
+func (c *Cache[K, V]) Set(key K, value V) {
+	c.timestamps.Set(key, time.Now())
+	c.values.Set(key, value)
+}
+
+func NewCache[K comparable, V any](values cache.Cache[K, V], timestamps cache.Cache[K, time.Time], ttl time.Duration) *Cache[K, V] {
+	return &Cache[K, V]{
+		values:     values,
+		timestamps: timestamps,
+		ttl:        ttl,
+	}
+}
+
+var _ cache.Cache[string, bool] = &Cache[string, bool]{}

internal/cache/ttl/cache_test.go

@@ -0,0 +1,39 @@
+package ttl
+
+import (
+	"testing"
+	"time"
+
+	"forge.cadoles.com/cadoles/bouncer/internal/cache/memory"
+)
+
+func TestCache(t *testing.T) {
+	cache := NewCache(
+		memory.NewCache[string, int](),
+		memory.NewCache[string, time.Time](),
+		time.Second,
+	)
+
+	key := "foo"
+
+	if _, exists := cache.Get(key); exists {
+		t.Errorf("cache.Get(\"%s\"): should not exists", key)
+	}
+
+	cache.Set(key, 1)
+
+	value, exists := cache.Get(key)
+	if !exists {
+		t.Errorf("cache.Get(\"%s\"): should exists", key)
+	}
+
+	if e, g := 1, value; e != g {
+		t.Errorf("cache.Get(\"%s\"): expected '%v', got '%v'", key, e, g)
+	}
+
+	time.Sleep(time.Second)
+
+	if _, exists := cache.Get("foo"); exists {
+		t.Errorf("cache.Get(\"%s\"): should not exists", key)
+	}
+}

internal/command/server/proxy/run.go

@@ -3,6 +3,7 @@ package proxy
 import (
 	"fmt"
 	"strings"
+	"time"
 
 	"forge.cadoles.com/cadoles/bouncer/internal/command/common"
 	"forge.cadoles.com/cadoles/bouncer/internal/proxy"
@@ -45,6 +46,7 @@ func RunCommand() *cli.Command {
 				proxy.WithServerConfig(conf.Proxy),
 				proxy.WithRedisConfig(conf.Redis),
 				proxy.WithDirectorLayers(layers...),
+				proxy.WithDirectorCacheTTL(time.Duration(conf.Proxy.Cache.TTL)),
 			)
 
 			addrs, srvErrs := srv.Start(ctx.Context)

internal/config/proxy_server.go

@@ -12,6 +12,18 @@ type ProxyServerConfig struct {
 	Transport TransportConfig `yaml:"transport"`
 	Dial      DialConfig      `yaml:"dial"`
 	Sentry    SentryConfig    `yaml:"sentry"`
+	Cache     CacheConfig     `yaml:"cache"`
+}
+
+func NewDefaultProxyServerConfig() ProxyServerConfig {
+	return ProxyServerConfig{
+		HTTP:      NewHTTPConfig("0.0.0.0", 8080),
+		Metrics:   NewDefaultMetricsConfig(),
+		Transport: NewDefaultTransportConfig(),
+		Dial:      NewDefaultDialConfig(),
+		Sentry:    NewDefaultSentryConfig(),
+		Cache:     NewDefaultCacheConfig(),
+	}
 }
 
 // See https://pkg.go.dev/net/http#Transport
@@ -58,13 +70,22 @@ func (c TransportConfig) AsTransport() *http.Transport {
 	return httpTransport
 }
 
-func NewDefaultProxyServerConfig() ProxyServerConfig {
-	return ProxyServerConfig{
-		HTTP:      NewHTTPConfig("0.0.0.0", 8080),
-		Metrics:   NewDefaultMetricsConfig(),
-		Transport: NewDefaultTransportConfig(),
-		Dial:      NewDefaultDialConfig(),
-		Sentry:    NewDefaultSentryConfig(),
+func NewDefaultTransportConfig() TransportConfig {
+	return TransportConfig{
+		ForceAttemptHTTP2:      true,
+		MaxIdleConns:           100,
+		MaxIdleConnsPerHost:    100,
+		MaxConnsPerHost:        100,
+		IdleConnTimeout:        NewInterpolatedDuration(90 * time.Second),
+		TLSHandshakeTimeout:    NewInterpolatedDuration(10 * time.Second),
+		ExpectContinueTimeout:  NewInterpolatedDuration(1 * time.Second),
+		ResponseHeaderTimeout:  NewInterpolatedDuration(10 * time.Second),
+		DisableCompression:     false,
+		DisableKeepAlives:      false,
+		ReadBufferSize:         4096,
+		WriteBufferSize:        4096,
+		MaxResponseHeaderBytes: 0,
+		InsecureSkipVerify:     false,
 	}
 }
 
@@ -85,21 +106,12 @@ func NewDefaultDialConfig() DialConfig {
 	}
 }
 
-func NewDefaultTransportConfig() TransportConfig {
-	return TransportConfig{
-		ForceAttemptHTTP2:      true,
-		MaxIdleConns:           100,
-		MaxIdleConnsPerHost:    100,
-		MaxConnsPerHost:        100,
-		IdleConnTimeout:        NewInterpolatedDuration(90 * time.Second),
-		TLSHandshakeTimeout:    NewInterpolatedDuration(10 * time.Second),
-		ExpectContinueTimeout:  NewInterpolatedDuration(1 * time.Second),
-		ResponseHeaderTimeout:  NewInterpolatedDuration(10 * time.Second),
-		DisableCompression:     false,
-		DisableKeepAlives:      false,
-		ReadBufferSize:         4096,
-		WriteBufferSize:        4096,
-		MaxResponseHeaderBytes: 0,
-		InsecureSkipVerify:     false,
+type CacheConfig struct {
+	TTL InterpolatedDuration `yaml:"ttl"`
+}
+
+func NewDefaultCacheConfig() CacheConfig {
+	return CacheConfig{
+		TTL: *NewInterpolatedDuration(time.Second * 30),
 	}
 }

internal/proxy/director/director.go

@@ -7,6 +7,7 @@ import (
 
 	"forge.cadoles.com/Cadoles/go-proxy"
 	"forge.cadoles.com/Cadoles/go-proxy/wildcard"
+	"forge.cadoles.com/cadoles/bouncer/internal/cache"
 	"forge.cadoles.com/cadoles/bouncer/internal/store"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
@@ -17,6 +18,9 @@ type Director struct {
 	proxyRepository store.ProxyRepository
 	layerRepository store.LayerRepository
 	layerRegistry   *LayerRegistry
+
+	proxyCache cache.Cache[string, []*store.Proxy]
+	layerCache cache.Cache[string, []*store.Layer]
 }
 
 func (d *Director) rewriteRequest(r *http.Request) (*http.Request, error) {
@@ -88,7 +92,14 @@ MAIN:
 	return r, nil
 }
 
+const proxiesCacheKey = "proxies"
+
 func (d *Director) getProxies(ctx context.Context) ([]*store.Proxy, error) {
+	proxies, exists := d.proxyCache.Get(proxiesCacheKey)
+	if exists {
+		return proxies, nil
+	}
+
 	headers, err := d.proxyRepository.QueryProxy(ctx, store.WithProxyQueryEnabled(true))
 	if err != nil {
 		return nil, errors.WithStack(err)
@@ -96,7 +107,7 @@ func (d *Director) getProxies(ctx context.Context) ([]*store.Proxy, error) {
 
 	sort.Sort(store.ByProxyWeight(headers))
 
-	proxies := make([]*store.Proxy, 0, len(headers))
+	proxies = make([]*store.Proxy, 0, len(headers))
 
 	for _, h := range headers {
 		if !h.Enabled {
@@ -111,10 +122,19 @@ func (d *Director) getProxies(ctx context.Context) ([]*store.Proxy, error) {
 		proxies = append(proxies, proxy)
 	}
 
+	d.proxyCache.Set(proxiesCacheKey, proxies)
+
 	return proxies, nil
 }
 
 func (d *Director) getLayers(ctx context.Context, proxyName store.ProxyName) ([]*store.Layer, error) {
+	cacheKey := "layers-" + string(proxyName)
+
+	layers, exists := d.layerCache.Get(cacheKey)
+	if exists {
+		return layers, nil
+	}
+
 	headers, err := d.layerRepository.QueryLayers(ctx, proxyName, store.WithLayerQueryEnabled(true))
 	if err != nil {
 		return nil, errors.WithStack(err)
@@ -122,7 +142,7 @@ func (d *Director) getLayers(ctx context.Context, proxyName store.ProxyName) ([]
 
 	sort.Sort(store.ByLayerWeight(headers))
 
-	layers := make([]*store.Layer, 0, len(headers))
+	layers = make([]*store.Layer, 0, len(headers))
 
 	for _, h := range headers {
 		if !h.Enabled {
@@ -137,6 +157,8 @@ func (d *Director) getLayers(ctx context.Context, proxyName store.ProxyName) ([]
 		layers = append(layers, layer)
 	}
 
+	d.layerCache.Set(cacheKey, layers)
+
 	return layers, nil
 }
 
@@ -240,8 +262,16 @@ func (d *Director) Middleware() proxy.Middleware {
 	}
 }
 
-func New(proxyRepository store.ProxyRepository, layerRepository store.LayerRepository, layers ...Layer) *Director {
-	registry := NewLayerRegistry(layers...)
+func New(proxyRepository store.ProxyRepository, layerRepository store.LayerRepository, funcs ...OptionFunc) *Director {
+	opts := NewOptions(funcs...)
 
-	return &Director{proxyRepository, layerRepository, registry}
+	registry := NewLayerRegistry(opts.Layers...)
+
+	return &Director{
+		proxyRepository: proxyRepository,
+		layerRepository: layerRepository,
+		layerRegistry:   registry,
+		proxyCache:      opts.ProxyCache,
+		layerCache:      opts.LayerCache,
+	}
 }

internal/proxy/director/options.go

@@ -0,0 +1,58 @@
+package director
+
+import (
+	"time"
+
+	"forge.cadoles.com/cadoles/bouncer/internal/cache"
+	"forge.cadoles.com/cadoles/bouncer/internal/cache/memory"
+	"forge.cadoles.com/cadoles/bouncer/internal/cache/ttl"
+	"forge.cadoles.com/cadoles/bouncer/internal/store"
+)
+
+type Options struct {
+	Layers     []Layer
+	ProxyCache cache.Cache[string, []*store.Proxy]
+	LayerCache cache.Cache[string, []*store.Layer]
+}
+
+type OptionFunc func(opts *Options)
+
+func NewOptions(funcs ...OptionFunc) *Options {
+	opts := &Options{
+		Layers: make([]Layer, 0),
+		ProxyCache: ttl.NewCache(
+			memory.NewCache[string, []*store.Proxy](),
+			memory.NewCache[string, time.Time](),
+			30*time.Second,
+		),
+		LayerCache: ttl.NewCache(
+			memory.NewCache[string, []*store.Layer](),
+			memory.NewCache[string, time.Time](),
+			30*time.Second,
+		),
+	}
+
+	for _, fn := range funcs {
+		fn(opts)
+	}
+
+	return opts
+}
+
+func WithLayers(layers ...Layer) OptionFunc {
+	return func(opts *Options) {
+		opts.Layers = layers
+	}
+}
+
+func WithProxyCache(cache cache.Cache[string, []*store.Proxy]) OptionFunc {
+	return func(opts *Options) {
+		opts.ProxyCache = cache
+	}
+}
+
+func WithLayerCache(cache cache.Cache[string, []*store.Layer]) OptionFunc {
+	return func(opts *Options) {
+		opts.LayerCache = cache
+	}
+}

internal/proxy/option.go

@@ -1,6 +1,8 @@
 package proxy
 
 import (
+	"time"
+
 	"forge.cadoles.com/cadoles/bouncer/internal/config"
 	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director"
 )
@@ -9,6 +11,7 @@ type Option struct {
 	ServerConfig     config.ProxyServerConfig
 	RedisConfig      config.RedisConfig
 	DirectorLayers   []director.Layer
+	DirectorCacheTTL time.Duration
 }
 
 type OptionFunc func(*Option)
@@ -18,6 +21,7 @@ func defaultOption() *Option {
 		ServerConfig:     config.NewDefaultProxyServerConfig(),
 		RedisConfig:      config.NewDefaultRedisConfig(),
 		DirectorLayers:   make([]director.Layer, 0),
+		DirectorCacheTTL: 30 * time.Second,
 	}
 }
 
@@ -38,3 +42,9 @@ func WithDirectorLayers(layers ...director.Layer) OptionFunc {
 		opt.DirectorLayers = layers
 	}
 }
+
+func WithDirectorCacheTTL(ttl time.Duration) OptionFunc {
+	return func(opt *Option) {
+		opt.DirectorCacheTTL = ttl
+	}
+}

internal/proxy/proxy_test.go

@@ -0,0 +1,156 @@
+package proxy_test
+
+import (
+	"context"
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"net/http/httputil"
+	"net/url"
+	"os"
+	"testing"
+	"time"
+
+	"forge.cadoles.com/Cadoles/go-proxy"
+	"forge.cadoles.com/cadoles/bouncer/internal/cache/memory"
+	"forge.cadoles.com/cadoles/bouncer/internal/cache/ttl"
+	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director"
+	"forge.cadoles.com/cadoles/bouncer/internal/store"
+	redisStore "forge.cadoles.com/cadoles/bouncer/internal/store/redis"
+	"github.com/pkg/errors"
+	"github.com/redis/go-redis/v9"
+)
+
+func BenchmarkProxy(b *testing.B) {
+	redisEndpoint := os.Getenv("BOUNCER_BENCH_REDIS_ADDR")
+	if redisEndpoint == "" {
+		redisEndpoint = "127.0.0.1:6379"
+	}
+
+	client := redis.NewUniversalClient(&redis.UniversalOptions{
+		Addrs: []string{redisEndpoint},
+	})
+
+	proxyRepository := redisStore.NewProxyRepository(client)
+	layerRepository := redisStore.NewLayerRepository(client)
+
+	backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		if _, err := w.Write([]byte("Hello, world.")); err != nil {
+			b.Logf("[ERROR] %+v", errors.WithStack(err))
+		}
+	}))
+	defer backend.Close()
+
+	if err := waitFor(backend.URL, 5*time.Second); err != nil {
+		b.Fatalf("[FATAL] %+v", errors.WithStack(err))
+	}
+
+	b.Logf("started backend '%s'", backend.URL)
+
+	ctx := context.Background()
+
+	proxyName := store.ProxyName(b.Name())
+
+	b.Logf("creating proxy '%s'", proxyName)
+
+	if err := proxyRepository.DeleteProxy(ctx, proxyName); err != nil {
+		b.Fatalf("[FATAL] %+v", errors.WithStack(err))
+	}
+
+	if _, err := proxyRepository.CreateProxy(ctx, proxyName, backend.URL, "*"); err != nil {
+		b.Fatalf("[FATAL] %+v", errors.WithStack(err))
+	}
+
+	if _, err := proxyRepository.UpdateProxy(ctx, proxyName, store.WithProxyUpdateEnabled(true)); err != nil {
+		b.Fatalf("[FATAL] %+v", errors.WithStack(err))
+	}
+
+	director := director.New(
+		proxyRepository, layerRepository,
+		director.WithLayerCache(
+			ttl.NewCache(
+				memory.NewCache[string, []*store.Layer](),
+				memory.NewCache[string, time.Time](),
+				30*time.Second,
+			),
+		),
+		director.WithProxyCache(
+			ttl.NewCache(
+				memory.NewCache[string, []*store.Proxy](),
+				memory.NewCache[string, time.Time](),
+				30*time.Second,
+			),
+		),
+	)
+
+	directorMiddleware := director.Middleware()
+
+	handler := proxy.New(
+		proxy.WithRequestTransformers(
+			director.RequestTransformer(),
+		),
+		proxy.WithResponseTransformers(
+			director.ResponseTransformer(),
+		),
+		proxy.WithReverseProxyFactory(func(ctx context.Context, target *url.URL) *httputil.ReverseProxy {
+			reverse := httputil.NewSingleHostReverseProxy(target)
+			reverse.ErrorHandler = func(w http.ResponseWriter, r *http.Request, err error) {
+				b.Logf("[ERROR] %s", errors.WithStack(err))
+			}
+			return reverse
+		}),
+	)
+
+	server := httptest.NewServer(directorMiddleware(handler))
+	defer server.Close()
+
+	b.Logf("started proxy '%s'", server.URL)
+
+	httpClient := server.Client()
+
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		res, err := httpClient.Get(server.URL)
+		if err != nil {
+			b.Errorf("could not fetch server url: %+v", errors.WithStack(err))
+		}
+
+		body, err := io.ReadAll(res.Body)
+		if err != nil {
+			b.Errorf("could not read response body: %+v", errors.WithStack(err))
+		}
+
+		b.Logf("%s - %v", res.Status, string(body))
+
+		if err := res.Body.Close(); err != nil {
+			b.Errorf("could not close response body: %+v", errors.WithStack(err))
+		}
+	}
+}
+
+func waitFor(url string, ttl time.Duration) error {
+	var lastErr error
+	timeout := time.After(ttl)
+	for {
+		select {
+		case <-timeout:
+			if lastErr != nil {
+				return lastErr
+			}
+
+			return errors.New("wait timed out")
+		default:
+			res, err := http.Get(url)
+			if err != nil {
+				lastErr = errors.WithStack(err)
+				continue
+			}
+
+			if res.StatusCode >= 200 && res.StatusCode < 400 {
+				return nil
+			}
+		}
+	}
+}

internal/proxy/server.go

@@ -11,6 +11,8 @@ import (
 	"time"
 
 	"forge.cadoles.com/Cadoles/go-proxy"
+	"forge.cadoles.com/cadoles/bouncer/internal/cache/memory"
+	"forge.cadoles.com/cadoles/bouncer/internal/cache/ttl"
 	bouncerChi "forge.cadoles.com/cadoles/bouncer/internal/chi"
 	"forge.cadoles.com/cadoles/bouncer/internal/config"
 	"forge.cadoles.com/cadoles/bouncer/internal/proxy/director"
@@ -28,6 +30,7 @@ type Server struct {
 	serverConfig     config.ProxyServerConfig
 	redisConfig      config.RedisConfig
 	directorLayers   []director.Layer
+	directorCacheTTL time.Duration
 	proxyRepository  store.ProxyRepository
 	layerRepository  store.LayerRepository
 }
@@ -86,7 +89,21 @@ func (s *Server) run(parentCtx context.Context, addrs chan net.Addr, errs chan e
 	director := director.New(
 		s.proxyRepository,
 		s.layerRepository,
-		s.directorLayers...,
+		director.WithLayers(s.directorLayers...),
+		director.WithLayerCache(
+			ttl.NewCache(
+				memory.NewCache[string, []*store.Layer](),
+				memory.NewCache[string, time.Time](),
+				s.directorCacheTTL,
+			),
+		),
+		director.WithProxyCache(
+			ttl.NewCache(
+				memory.NewCache[string, []*store.Proxy](),
+				memory.NewCache[string, time.Time](),
+				s.directorCacheTTL,
+			),
+		),
 	)
 
 	if s.serverConfig.HTTP.UseRealIP {
@@ -187,5 +204,6 @@ func NewServer(funcs ...OptionFunc) *Server {
 		serverConfig:     opt.ServerConfig,
 		redisConfig:      opt.RedisConfig,
 		directorLayers:   opt.DirectorLayers,
+		directorCacheTTL: opt.DirectorCacheTTL,
 	}
 }

misc/packaging/common/config.yml

@@ -93,6 +93,14 @@ proxy:
       credentials:
         prom: etheus
 
+  # Configuration de la mise en cache
+  # locale des données proxy/layers
+  cache:
+    # Les proxys/layers sont mis en cache local pour une durée de 30s
+    # par défaut. Si les modifications sont rares, vous pouvez augmenter
+    # cette valeur pour réduire la "pression" sur le serveur Redis.
+    ttl: 30s
+
   # Configuration du transport HTTP(S)
   # Voir https://pkg.go.dev/net/http#Transport
   transport: