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AWS ElastiCache

Create ElastiCache for Redis database and Memcache memory caching

Amazon ElastiCache is a serverless caching service delivering real-time, cost-optimized performance for modern applications. DuploCloud supports Memcached, Redis, and Valkey ElastiCache instances, including a Serverless Valkey option.

Creating a Memcached ElastiCache Instance

In the DuploCloud Portal, navigate to Cloud Services -> Database.
Select the ElastiCache tab and click Add. The Create a ElastiCache page displays.
Enter a database Name.
In the Type list box, select Memcached.
Select the Memcached Version.
Select the node size in the Size list box.
Specify the number of Replicas.
Click Create. The Memcached ElastiCache instance is created.

Pass the cache endpoint to your application through the via the AWS Service.

Creating a Redis or Valkey ElastiCache Instance

In the DuploCloud Portal, navigate to Cloud Services -> Database.
Select the ElastiCache tab and click Add. The Create an ElastiCache page displays.

Complete the following fields as required for your Redis or Valkey instance:

Click Create to create the Reds or Valkey instance.

Updating Snapshot Retention Limit

After a Redis or Valkey (standard) ElastiCache instance is created, most settings cannot be changed without deleting and recreating the instance. However, you can update the Snapshot Retention Limit at any time.

This setting is not available for Memcached or Valkey Serverless. It applies only to Redis and standard Valkey instances.

To update the Snapshot Retention Limit:

Navigate to Cloud Services -> Database.
Select the ElastiCache tab.
Click on the name of the ElastiCache instance in the NAME column.

Creating a Serverless Valkey ElastiCache Instance

Serverless Valkey clusters automatically scale based on workload demand. Unlike standard Redis or Valkey clusters, node size, replicas, and cluster mode are automatically managed by the system.

To create a Serverless Valkey instance, complete the following steps:

In the DuploCloud Portal, navigate to Cloud Services → Database → ElastiCache
Click Add. The Create a ElastiCache page displays.
Select the Serverless option at the top of the page.

Click Create. DuploCloud provisions the Serverless Valkey cluster automatically and the system manages scaling, availability, and endpoints.

Node size, number of replicas, and cluster mode fields are automatically managed and do not require configuration.

Creating an ElastiCache Global Datastore

DuploCloud supports ElastiCache Global Datastores, which allow you to replicate standard Redis and standard Valkey clusters across multiple AWS regions. Memcached and Serverless Valkey clusters are not supported for Global Datastores.

Creating a Global Datastore

When you create a Global Datastore in DuploCloud, a primary Redis cluster in the current Tenant and a secondary cluster in a different region are created automatically. You can add additional secondary clusters in other regions as necessary.

Navigate to to Cloud Services → Database → ElastiCache → Global Datastores.
Click Add. The Create a Global Datastore pane displays.
Complete the fields, as required for your configuration:

Click Create to provision the ElastiCache Global Datastore.

Adding Regional Clusters

After creating a Global Datastore, you can add secondary clusters (regional clusters) to replicate the primary Redis cluster across other AWS regions.

Navigate to Cloud Services → Databases → ElastiCache → Global Datastores.
Select the Regional Clusters tab.
Click Add. The Add Secondary Cluster pane displays.

Click Create to provision the secondary cluster.

Each regional cluster added becomes a read replica of the primary Redis cluster. You can retrieve the primary or secondary cluster endpoint directly from the Redis Cluster tab to connect your application.

Viewing Cluster Details

To view cluster details, including connection endpoints for a Global Datastore:

Navigate to Cloud Services → Database → ElastiCache → Global Datastores.
Select the name of the Global Datastore.
Select the Regional Clusters tab. A list of clusters in the Global Datastore displays.

Each cluster provides a single endpoint. The primary endpoint handles write operations, and the secondary endpoint handles read operations.

Removing Clusters

To remove a cluster from a Global Datastore:

Navigate to Cloud Services → Database → ElastiCache → Global Datastores.
Select the name of the Global Datastore.
Select the Regional Clusters tab

Important:

Secondary clusters must be removed before the primary cluster.

Troubleshooting Redis Connection Issues in AWS

When a Redis instance in an AWS environment is experiencing connection issues, ensure the Security Group (SG) configuration allows VPN traffic to port 6379. Then, using the nc command, verify the Redis instance's accessibility.

If you encounter local DNS resolution problems, consider changing your DNS provider or connecting directly using the Redis instance's IP address, which can be obtained via the dig command.

For persistent DNS issues, resetting your router or using external DNS query tools may help. If other troubleshooting steps fail, exploring can offer additional insights.

AWS ElastiCache

Create ElastiCache for Redis database and Memcache memory caching

Creating a Memcached ElastiCache Instance

In the DuploCloud Portal, navigate to Cloud Services -> Database.
Select the ElastiCache tab and click Add. The Create a ElastiCache page displays.
Enter a database Name.
In the Type list box, select Memcached.
Select the Memcached Version.
Select the node size in the Size list box.
Specify the number of Replicas.
Click Create. The Memcached ElastiCache instance is created.

Pass the cache endpoint to your application through the via the AWS Service.

Creating a Redis or Valkey ElastiCache Instance

In the DuploCloud Portal, navigate to Cloud Services -> Database.
Select the ElastiCache tab and click Add. The Create an ElastiCache page displays.

Complete the following fields as required for your Redis or Valkey instance:

Click Create to create the Reds or Valkey instance.

Updating Snapshot Retention Limit

This setting is not available for Memcached or Valkey Serverless. It applies only to Redis and standard Valkey instances.

To update the Snapshot Retention Limit:

Navigate to Cloud Services -> Database.
Select the ElastiCache tab.
Click on the name of the ElastiCache instance in the NAME column.

Creating a Serverless Valkey ElastiCache Instance

Serverless Valkey clusters automatically scale based on workload demand. Unlike standard Redis or Valkey clusters, node size, replicas, and cluster mode are automatically managed by the system.

To create a Serverless Valkey instance, complete the following steps:

In the DuploCloud Portal, navigate to Cloud Services → Database → ElastiCache
Click Add. The Create a ElastiCache page displays.
Select the Serverless option at the top of the page.

Click Create. DuploCloud provisions the Serverless Valkey cluster automatically and the system manages scaling, availability, and endpoints.

Node size, number of replicas, and cluster mode fields are automatically managed and do not require configuration.

Creating an ElastiCache Global Datastore

Creating a Global Datastore

Navigate to to Cloud Services → Database → ElastiCache → Global Datastores.
Click Add. The Create a Global Datastore pane displays.
Complete the fields, as required for your configuration:

Click Create to provision the ElastiCache Global Datastore.

Adding Regional Clusters

After creating a Global Datastore, you can add secondary clusters (regional clusters) to replicate the primary Redis cluster across other AWS regions.

Navigate to Cloud Services → Databases → ElastiCache → Global Datastores.
Select the Regional Clusters tab.
Click Add. The Add Secondary Cluster pane displays.

Click Create to provision the secondary cluster.

Viewing Cluster Details

To view cluster details, including connection endpoints for a Global Datastore:

Navigate to Cloud Services → Database → ElastiCache → Global Datastores.
Select the name of the Global Datastore.
Select the Regional Clusters tab. A list of clusters in the Global Datastore displays.

Each cluster provides a single endpoint. The primary endpoint handles write operations, and the secondary endpoint handles read operations.

Removing Clusters

To remove a cluster from a Global Datastore:

Navigate to Cloud Services → Database → ElastiCache → Global Datastores.
Select the name of the Global Datastore.
Select the Regional Clusters tab

Important:

Secondary clusters must be removed before the primary cluster.

Troubleshooting Redis Connection Issues in AWS

If you encounter local DNS resolution problems, consider changing your DNS provider or connecting directly using the Redis instance's IP address, which can be obtained via the dig command.

For persistent DNS issues, resetting your router or using external DNS query tools may help. If other troubleshooting steps fail, exploring can offer additional insights.