Valkey Migration Check — ElastiCache Redis ties

Finds every line in your Terraform, CloudFormation, compose files and Dockerfiles that still ties you to Redis, and prints the Valkey line that replaces it.

Worked example: a 44-line main.tf returns 6 findings (3 errors, 3 warnings): a redis5.0 parameter group, ElastiCache Redis OSS 5.0.6 and 4.0.10 (billed an 80% Extended Support premium since February 1, 2026), Redis OSS 6.2 (standard support ends January 31, 2027), a serverless cache on the redis engine and a redis:7.4-alpine image.

Web version and source list: https://getreadystack.com/tools/valkey-migration-check

Before → after on the bundled main.tf

The fixed main.tf returns 0 findings.

What it checks — 8 rules

The "as of" date changes the answer: before February 1, 2027 Redis OSS 6 is a warning, from that day an error; from February 1, 2028 the Redis OSS 4/5 message names the 160% year-3 premium.

The yardstick

AWS's own example: a cache.m5.large node on Redis OSS 5 in US East (Ohio) costs $0.156/hr on demand, and Extended Support adds $0.1248/hr (80%) in years 1 and 2 — reserved-node discounts do not apply to that charge. AWS prices node-based ElastiCache for Valkey 20% lower and ElastiCache Serverless for Valkey 33% lower than the other engines.

Sources

• ElastiCache Extended Support dates and premiums: https://docs.aws.amazon.com/AmazonElastiCache/latest/dg/extended-support-versions.html
• Extended Support charge example and reserved nodes: https://docs.aws.amazon.com/AmazonElastiCache/latest/dg/extended-support-charges.html
• Valkey pricing: https://aws.amazon.com/elasticache/pricing/
• Redis licences: https://redis.io/legal/licenses/

Free and full version

Free: all 8 rules on the open file, in VS Code and on the web page, with the Valkey fix on every finding and no cap.

Full version ($29 once, one licence key per person or team seat): scan every repo in the workspace and export a dated Markdown migration plan per repo, each Redis tie mapped to its Valkey line.

Commands

• Check this file — runs all 8 rules on the open *.tf, *.yaml, *.yml, *.template, Dockerfile* or devcontainer.json.
• Sweep workspace and write report — full version.
• Enter licence key — unlocks the workspace sweep.

Findings appear in the Problems panel with the rule id, the line and the fix. Nothing leaves your machine.