Client library code samples

This page provides code samples for Memorystore for Valkey instances that have both the Cluster Mode Enabled and Cluster Mode Disabled modes.

Code samples for Cluster Mode Enabled

Memorystore for Valkey is compatible with all of the Memorystore for Redis Cluster client code samples:

About Valkey GLIDE

Valkey General Language Independent Driver for the Enterprise (GLIDE) is an open-source client library, and it supports all Valkey commands.

You can use Valkey GLIDE to connect your applications to Memorystore for Valkey instances. Valkey GLIDE is designed for reliability, optimized performance, and high-availability.

To help ensure consistency in application development and operations, Valkey GLIDE is implemented using a core driver framework, written in Rust, with language-specific extensions. This design ensures consistency in features across languages and reduces complexity.

Valkey GLIDE supports Valkey versions 7.2 and 8.0. It's available for the following languages:

Other Valkey OSS client libraries

In addition to Valkey GLIDE, Memorystore for Valkey is compatible with the following Valkey OSS client libraries:

Code samples for Cluster Mode Disabled

Memorystore for Valkey Cluster Mode Disabled is compatible with all Redis and Valkey OSS client libraries listed in Code samples for Cluster Mode Enabled.

When you use a Cluster Mode Disabled instance in Memorystore for Valkey, complete the following actions:

  • Instead of the RedisCluster or ValkeyCluster client object that the library provides, use the Redis or Valkey client object.
  • Create a writer client by using the primary endpoint IP address.

  • Create a reader client by using the reader endpoint IP address.

redis-py

import redis
primaryEndpoint = PRIMARY_ENDPOINT_IP
readerEndpoint = READER_ENDPOINT_IP

primary_client = redis.Redis(host=primaryEndpoint, port=6379, db=0, decode_responses=True)
reader_client = redis.Redis(host=readerEndpoint, port=6379, db=0, decode_responses=True)

primary_client.set("key","value")
print(reader_client.get("key"))

go-redis

package main

import (
"context"
"fmt"
"github.com/redis/go-redis/v9"
)

func main() {
primary_endpoint := PRIMARY_ENDPOINT_IP
reader_endpoint := READER_ENDPOINT_IP

primary_client := redis.NewClient(&redis.Options{
  Addr:     primary_endpoint,
  Password: "", // no password set
  DB:       0,  // use default DB
})

reader_client := redis.NewClient(&redis.Options{
  Addr:     reader_endpoint,
  Password: "", // no password set
  DB:       0,  // use default DB
})

ctx := context.Background()

err := primary_client.Set(ctx, "foo", "bar", 0).Err()
if err != nil {
  panic(err)
}

val, err := reader_client.Get(ctx, "foo").Result()
if err != nil {
  panic(err)
}
fmt.Println("foo", val)
}

Jedis


package org.example;

import java.io.*;
import java.time.LocalDateTime;
import java.lang.Thread;
import java.util.HashMap;
import java.util.Map;

import redis.clients.jedis.HostAndPort;
import redis.clients.jedis.JedisPoolConfig;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

public class Main
{
public static void main( String[] args )
{
  primaryEndpoint = PRIMARY_ENDPOINT_IP

  JedisPool pool = new JedisPool(primaryEndpoint, 6379);

  try (Jedis jedis = pool.getResource()) {
    jedis.set("foo", "bar");
    System.out.println(jedis.get("foo")); // prints bar

    Map hash = new HashMap<>();;
    hash.put("name", "John");
    hash.put("surname", "Smith");
    hash.put("company", "Redis");
    hash.put("age", "29");
    jedis.hset("user-session:123", hash);
    System.out.println(jedis.hgetAll("user-session:123"));
    // Prints: {name=John, surname=Smith, company=Redis, age=29}
  } catch (Exception e) {
    System.out.println("Error setting or getting  key: " + e.getMessage());
  }
}
}

Node.js

import { createClient } from 'redis';
import * as fs from 'fs';

const primaryEndpoint = PRIMARY_ENDPOINT_IP

const primary_endpoint_url ='redis://primaryEndpoint:6379'

const client = createClient({
url: primary_endpoint_url
});

await client.connect();
await client.set(key, value);
const retval = await client.get(key);
console.log(retval)

Code sample for both IAM authentication and in-transit encryption

This section gives an example of how to authenticate and connect to a Memorystore for Valkey instance by using both IAM authentication and in-transit encryption with various client libraries.

redis-py

from google.cloud import iam_credentials_v1
from redis.backoff import ConstantBackoff
from redis.retry import Retry
from redis.exceptions import (
ConnectionError,
AuthenticationWrongNumberOfArgsError,
AuthenticationError
)
from redis.utils import (str_if_bytes)

import redis

service_account="projects/-/serviceAccounts/<TO-DO-1: your service account that used to authenticate to Valkey>""

host=<TO-DO-2: your Redis Cluster discovery endpoint ip>
ssl_ca_certs=<TO-DO-3, your trusted server ca file name>

def generate_access_token():
  # Create a client
  client = iam_credentials_v1.IAMCredentialsClient()

  # Initialize request argument(s)
  request = iam_credentials_v1.GenerateAccessTokenRequest(
      name=service_account,
      scope=['https://www.googleapis.com/auth/cloud-platform'],
  )

  # Make the request
  response = client.generate_access_token(request=request)
  print(str(response.access_token))

  # Handle the response
  return str(response.access_token)

class ValkeyTokenProvider(redis.CredentialProvider):

    # Generated IAM tokens are valid for 15 minutes
    def get_credentials(self):
        token= generate_access_token()
        return "default",token

creds_provider = ValkeyTokenProvider()
client = redis.Redis(host=host, port=6379, credential_provider=creds_provider, ssl=True, ssl_ca_certs=caFilePath)
client.set('foo',"bar")
print(client.get('foo'))

Go

package main

import (
  "context"
  "crypto/tls"
  "crypto/x509"
  "flag"
  "fmt"
  "io/ioutil"
  "log"
  "sync"
  "time"

  credentials "google.golang.org/genproto/googleapis/iam/credentials/v1"

  "github.com/golang/protobuf/ptypes"
  "github.com/redis/go-redis/v9"
  "google.golang.org/api/option"
  gtransport "google.golang.org/api/transport/grpc"
)

var (
  svcAccount               = flag.String("a", "projects/-/serviceAccounts/example-service-account@example-project.iam.gserviceaccount.com", "service account email")
  lifetime                 = flag.Duration("d", time.Hour, "lifetime of token")
  refreshDuration          = flag.Duration("r", 5*time.Minute, "token refresh duration")
  checkTokenExpiryInterval = flag.Duration("e", 10*time.Second, "check token expiry interval")
  lastRefreshInstant       = time.Time{}
  errLastSeen              = error(nil)
  token                    = ""
  mu                       = sync.RWMutex{}
  err                      = error(nil)
)

func retrieveToken() (string, error) {
  ctx := context.Background()
  conn, err := gtransport.Dial(ctx,
    option.WithEndpoint("iamcredentials.googleapis.com:443"),
    option.WithScopes("https://www.googleapis.com/auth/cloud-platform"))

  if err != nil {
    log.Printf("Failed to dial API, error: %v", err)
    return token, err
  }
  client := credentials.NewIAMCredentialsClient(conn)
  req := credentials.GenerateAccessTokenRequest{
    Name:     *svcAccount,
    Scope:    []string{"https://www.googleapis.com/auth/cloud-platform"},
    Lifetime: ptypes.DurationProto(*lifetime),
  }
  rsp, err := client.GenerateAccessToken(ctx, &req)
  if err != nil {
    log.Printf("Failed to call GenerateAccessToken with request: %v, error: %v", req, err)
    return token, err
  }
  return rsp.AccessToken, nil
}

func refreshTokenLoop() {
  if *refreshDuration > *lifetime {
    log.Fatal("Refresh should not happen after token is already expired.")
  }
  for {
    mu.RLock()
    lastRefreshTime := lastRefreshInstant
    mu.RUnlock()
    if time.Now().After(lastRefreshTime.Add(*refreshDuration)) {
      var err error
      retrievedToken, err := retrieveToken()
      mu.Lock()
      token = retrievedToken
      if err != nil {
        errLastSeen = err
      } else {
        lastRefreshInstant = time.Now()
      }
      mu.Unlock()
    }
    time.Sleep(*checkTokenExpiryInterval)
  }
}

func retrieveTokenFunc() (string, string) {
  mu.RLock()
  defer mu.RUnlock()
  if time.Now().After(lastRefreshInstant.Add(*refreshDuration)) {
    log.Printf("Token is expired. last refresh instant: %v, refresh duration: %v, error that was last seen: %v", lastRefreshInstant, *refreshDuration, errLastSeen)
    return "", ""
  }
  username := "default"
  password := token
  return username, password
}

func main() {
  caFilePath := CA_FILE_PATH
  clusterDicEpAddr := PRIMARY_ENDPOINT_IP_ADDRESS_AND_PORT
  caCert, err := ioutil.ReadFile(caFilePath)
  if err != nil {
    log.Fatal(err)
  }
  caCertPool := x509.NewCertPool()
  caCertPool.AppendCertsFromPEM(caCert)
  token, err = retrieveToken()
  if err != nil {
    log.Fatal("Cannot retrieve IAM token to authenticate to the cluster, error: %v", err)
  }
  token, err = retrieveToken()
  fmt.Printf("token : %v", token)
  if err != nil {
    log.Fatal("Cannot retrieve IAM token to authenticate to the cluster, error: %v", err)
  }
  lastRefreshInstant = time.Now()
  go refreshTokenLoop()

  client := redis.NewClient(&redis.Options{
    Addr:                clusterDicEpAddr,
    CredentialsProvider: retrieveTokenFunc,
    TLSConfig: &tls.Config{
      RootCAs: caCertPool,
    },
  })

  ctx := context.Background()
  err = client.Set(ctx, "foo", "bar", 0).Err()
  if err != nil {
    log.Fatal(err)
  }
  val, err := client.Get(ctx, "foo").Result()
  if err != nil {
    log.Fatal(err)
  }
  fmt.Printf("\nGot the value for key: key, which is %s \n", val)
}