Memorystore Redis

Memorystore Redis Instance

Enable API

gcloud services enable servicenetworking.googleapis.com
gcloud services enable redis.googleapis.com

Enabling this API may take a few minutes.

Create an Instance

Create an instance and attach it to the default VPC.

gcloud redis instances create orders-cache \
  --size=1 --region=us-central1

Creating a Redis instance may take a few minutes.

Get Instance IP Address

gcloud redis instances describe orders-cache \
  --region=us-central1 --format="value(host)"

The IP address is not a static IP address. If you create the instance, the IP address may be different.

Connect to Instance

See Memorystore connectivity options to see how to connect to a Memorystore instance from different computing environments.

Computing Environment
Compute Engine	Guide
Kubernetes Engine	Guide
App Engine Flexible	Guide
App Engine Standard	Guide
Cloud Run	Guide
Cloud Function	Guide

You can test quickly by creating a Compute Engine instance in a zone within the same region:

gcloud compute instances create test-memorystore-vm --zone=us-central1-c

SSH into the machine:

gcloud compute ssh test-memorystore-vm --zone=us-central1-c

Install redis-cli:

sudo apt-get update && sudo apt-get install -y redis-tools

Connect to the instance:

redis-cli -h <MEMORYSTORE_REDIS_IP>

You can try different Redis commands, for example:

> PING
PONG
> SET greeting Hello
OK
> GET greeting
"Hello"

See redis-cli documentation for more information.

Spring Boot Cache

Spring Boot can use Redis to cache with annotations.

Dependency

Add the Spring Data Redis starter:

Maven

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

Gradle

Configuration

Configure the Redis instance to connect to:

application.properties

spring.redis.host=<MEMORYSTORE_REDIS_IP>

# Configure default TTL, e.g., 10 minutes
spring.cache.redis.time-to-live=600000

Enable Caching

Turn on caching capability explicitly with the @EnableCaching annotation:

@SpringBootApplication
@EnableCaching
class DemoApplication {
  ...
}

Cacheable

Once you configured the Spring Boot with Redis and enabled caching, you can use the @Cacheable annotation to cache return values.

@Service
class OrderService {
  private final OrderRepository orderRepository;
  
  public OrderService(OrderRepository orderRepository) {
    this.orderRepository = orderRepository;
  }
  
  @Cacheable("order")
  public Order getOrder(Long id) {
    orderRepository.findById(id);
  }
}

Read Spring Boot documentation on Cacheable and Redis for more information.

Spring Boot Session

Spring Boot can use Redis for session data with Spring Session Data Redis.

Dependency

Add the Spring Data Spanner starter:

Maven

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-session-data-redis</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

Gradle

Configuration

Configure the Redis instance to connect to:

application.properties

spring.redis.host=<MEMORYSTORE_REDIS_IP>

# Configure default TTL, e.g., 10 minutes
spring.cache.redis.time-to-live=600000

Enable HTTP Session

Turn on caching capability explicitly with the @EnableSpringHttpSession annotation:

@SpringBootApplication
@EnableSpringHttpSession
class DemoApplication {
  ...
}

Samples

• Spring Boot Session Data Redis sample