Decide on Elasticache Redis Requirements
Problem
We need to define the use-cases and outline soft requirements for Elasticache Redis.
Context
Amazon ElastiCache for Redis is Amazon’s fully managed version of Open Source https://redis.io/ in-memory data store that provides sub-millisecond latency and powers some of the largest websites out there. Any applications you have that depend on Redis can work seamlessly with ElastiCache Redis without any code changes.
See https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/nodes-select-size.html for Amazon’s recommendations on right-sizing clusters.
Considered Options
Ideally, share a screenshot of any existing Elasticache redis requirements and we can provision accordingly.
| Requirement | Recommendation | Description |
|---|---|---|
| Cache Engine | Redis | |
| Instance family | ||
| Encryption in Transit | No | By default, we don’t require this as :::info Native TLS was not supported prior to open source Redis version 6.0. As a result, not every Redis client library supports TLS. https://redis.io/topics/encryption ::: |
| Encryption at Rest | ||
| Security Group Restrictions | 10.0.0.0/0 | |
| Automated failover | yes | |
| Auto minor upgrade | N/A | Auto Minor Upgrade is only supported for engine type "redis" and if the engine version is 6 or higher.(See: https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/VersionManagement.html ) |
| Multi-az enabled | deployed across 2 AZs (private subnets) | |
| Number of nodes | ||
| Cluster Mode Enabled | ||
| AWS Backup requirements | https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/backups.html | |
| Additional options |
Consequences
-
We’ll provision Elasticache Redis using our
elasticache-rediscomponent. -
Define the catalog entries for the various Redis configurations
-
Enable AWS backups, as necessary