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Integrate Online Boutique with Memorystore (Redis)

By default the cartservice app is serializing the data in an in-cluster Redis database. Using a database outside your GKE cluster could bring more resiliency and more security with a managed service like Google Cloud Memorystore (Redis).

Architecture diagram with Memorystore

Provision a Memorystore (Redis) instance

Important notes:

  • You can connect to a Memorystore (Redis) instance from GKE clusters that are in the same region and use the same network as your instance.
  • You cannot connect to a Memorystore (Redis) instance from a GKE cluster without VPC-native/IP aliasing enabled.

To provision a Memorystore (Redis) instance you can follow the following instructions:

ZONE="<your-GCP-zone>"
REGION="<your-GCP-region>"

gcloud services enable redis.googleapis.com

gcloud redis instances create redis-cart \
    --size=1 \
    --region=${REGION} \
    --zone=${ZONE} \
    --redis-version=redis_6_x

Note: You can also find in this repository the Terraform script to provision the Memorystore (Redis) instance alongside the GKE cluster, more information here.

Deploy Online Boutique connected to a Memorystore (Redis) instance

To automate the deployment of Online Boutique integrated with Memorystore (Redis) you can leverage the following variation with Kustomize.

From the kustomize/ folder at the root level of this repository, execute this command:

kustomize edit add component components/memorystore

Note: this Kustomize component will also remove the redis-cart Deployment and Service not used anymore.

This will update the kustomize/kustomization.yaml file which could be similar to:

apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
- base
components:
- components/memorystore

Update current Kustomize manifest to target this Memorystore (Redis) instance.

REDIS_IP=$(gcloud redis instances describe redis-cart --region=${REGION} --format='get(host)')
REDIS_PORT=$(gcloud redis instances describe redis-cart --region=${REGION} --format='get(port)')
sed -i "s/REDIS_CONNECTION_STRING/${REDIS_IP}:${REDIS_PORT}/g" components/memorystore/kustomization.yaml

You can locally render these manifests by running kubectl kustomize . as well as deploying them by running kubectl apply -k ..

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