test(example): Add minimal example for system assigned

Author: ndyakov

examples/entraid/managedidentity_systemassigned_min/go.mod

@@ -0,0 +1,31 @@
+module managedidentity_systemassigned
+
+go 1.23.4
+
+require (
+	config v0.0.0
+	github.com/redis/go-redis-entraid v1.0.1
+	github.com/redis/go-redis/v9 v9.9.0
+)
+
+replace (
+	config => ../config
+	github.com/redis/go-redis-entraid => ../../../
+)
+
+require (
+	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.18.0 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.10.0 // indirect
+	github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.1 // indirect
+	github.com/AzureAD/microsoft-authentication-library-for-go v1.4.2 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/golang-jwt/jwt/v5 v5.2.2 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/kylelemons/godebug v1.1.0 // indirect
+	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
+	golang.org/x/crypto v0.38.0 // indirect
+	golang.org/x/net v0.40.0 // indirect
+	golang.org/x/sys v0.33.0 // indirect
+	golang.org/x/text v0.25.0 // indirect
+)

examples/entraid/managedidentity_systemassigned_min/go.sum

@@ -0,0 +1,61 @@
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examples/entraid/managedidentity_systemassigned_min/main.go

@@ -0,0 +1,117 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"config"
+
+	entraid "github.com/redis/go-redis-entraid"
+	"github.com/redis/go-redis/v9"
+)
+
+func main() {
+	ctx := context.Background()
+
+	// Load configuration
+	cfg, err := config.LoadConfig(os.Getenv("REDIS_ENDPOINTS_CONFIG_PATH"))
+	if err != nil {
+		log.Fatalf("Failed to load config: %v", err)
+	}
+
+	// Create a managed identity credentials provider for system-assigned identity
+	cp, err := entraid.NewManagedIdentityCredentialsProvider(entraid.ManagedIdentityCredentialsProviderOptions{})
+	if err != nil {
+		log.Fatalf("Failed to create credentials provider: %v", err)
+	}
+
+	// Create Redis client with streaming credentials provider
+	opts, err := redis.ParseURL(cfg.Endpoints["standalone-entraid-acl"].Endpoints[0])
+	if err != nil {
+		log.Fatalf("Failed to parse Redis URL: %v", err)
+	}
+	opts.StreamingCredentialsProvider = cp
+	redisClient := redis.NewClient(opts)
+
+	// Create second Redis client for cluster
+	clusterOpts, err := redis.ParseURL(cfg.Endpoints["cluster-entraid-acl"].Endpoints[0])
+	if err != nil {
+		log.Fatalf("Failed to parse Redis URL: %v", err)
+	}
+	clusterClient := redis.NewClusterClient(&redis.ClusterOptions{
+		Addrs:                        []string{clusterOpts.Addr},
+		StreamingCredentialsProvider: cp,
+	})
+
+	// Test the connection
+	pong, err := redisClient.Ping(ctx).Result()
+	if err != nil {
+		log.Fatalf("Failed to ping Redis: %v", err)
+	}
+	fmt.Printf("Successfully connected to Redis standalone: %s\n", pong)
+
+	// Test cluster connection
+	clusterPong, err := clusterClient.Ping(ctx).Result()
+	if err != nil {
+		log.Fatalf("Failed to ping Redis cluster: %v", err)
+	}
+	fmt.Printf("Successfully connected to Redis cluster: %s\n", clusterPong)
+
+	// Set a test key
+	err = redisClient.Set(ctx, "test-key", "test-value", 0).Err()
+	if err != nil {
+		log.Fatalf("Failed to set test key: %v", err)
+	}
+
+	// Get the test key
+	val, err := redisClient.Get(ctx, "test-key").Result()
+	if err != nil {
+		log.Fatalf("Failed to get test key: %v", err)
+	}
+	fmt.Printf("Retrieved value from standalone: %s\n", val)
+
+	// Set a test key in cluster
+	err = clusterClient.Set(ctx, "test-key", "test-value", 0).Err()
+	if err != nil {
+		log.Fatalf("Failed to set test key in cluster: %v", err)
+	}
+
+	// Get the test key from cluster
+	clusterVal, err := clusterClient.Get(ctx, "test-key").Result()
+	if err != nil {
+		log.Fatalf("Failed to get test key from cluster: %v", err)
+	}
+	fmt.Printf("Retrieved value from cluster: %s\n", clusterVal)
+
+	// Wait for token to expire
+	fmt.Println("Waiting for token to expire...")
+	time.Sleep(3 * time.Second)
+
+	// Test token refresh by retrying operations
+	fmt.Println("Testing token refresh...")
+
+	// Retry standalone operations
+	for i := 0; i < 3; i++ {
+		pong, err = redisClient.Ping(ctx).Result()
+		if err != nil {
+			log.Printf("Failed to ping Redis (attempt %d): %v", i+1, err)
+			continue
+		}
+		fmt.Printf("Successfully pinged Redis standalone after token refresh: %s\n", pong)
+		break
+	}
+
+	// Retry cluster operations
+	for i := 0; i < 3; i++ {
+		clusterPong, err = clusterClient.Ping(ctx).Result()
+		if err != nil {
+			log.Printf("Failed to ping Redis cluster (attempt %d): %v", i+1, err)
+			continue
+		}
+		fmt.Printf("Successfully pinged Redis cluster after token refresh: %s\n", clusterPong)
+		break
+	}
+}