[FEATURE] Add multi-AZ failover for ElastiCache Redis

[ritik4ever]

Category: devops
Project area: deployment/terraform/modules/elasticache
Labels: devops, enhancement

Implementation:

• Enable Multi-AZ with automatic failover on the ElastiCache replication group in the elasticache terraform module
• Add at least one read replica in a separate availability zone
• Update backend Redis client configuration to use the cluster/replication-group endpoint rather than a single node
• Document failover behavior and expected client reconnect handling

Acceptance Criteria:

• Redis remains available (with brief failover interruption) if the primary node's AZ becomes unavailable
• Terraform apply provisions the replication group with Multi-AZ enabled
• Backend Redis client is configured against the correct cluster endpoint

[madisonsc52-del]

@madisonsc52-del has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi maintainer i can work on this, I'll make sure to work on the issue asap

ℹ️ Repo Maintainers: To accept this application, review their application or assign @madisonsc52-del to this issue.

[edehvictor]

@edehvictor has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi maintainers!
I’d love to help out with this issue. I’ve checked the current codebase/documentation and know exactly what needs to be updated to make this clearer. I will ensure everything aligns perfectly with your existing contribution guidelines.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @edehvictor to this issue.

[0darkside0rbit-star]

@0darkside0rbit-star has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @0darkside0rbit-star to this issue.

[devsimze]

@devsimze has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi I'd like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @devsimze to this issue.

[afeezorobsco-cyber]

@afeezorobsco-cyber has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @afeezorobsco-cyber to this issue.

[Gbangbolaoluwagbemiga]

@Gbangbolaoluwagbemiga has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi Maintainer Ritik, I'd like to pick up (Issue #1485). I've worked with Relevant Stack on Similar Past Work in this org, and I'm confident I can ship a clean fix within 7hrs. Could you assign it to me? Happy to share my approach before I start if that helps.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Gbangbolaoluwagbemiga to this issue.

[6akola]

@6akola has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi, please, I would like to work on this issue.
Thank you.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @6akola to this issue.

[Shalom-margort]

@Shalom-margort has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

dear maintainer i would love to work on this issue
help the needy

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Shalom-margort to this issue.

[drips-wave]

Congratulations, @edehvictor! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @edehvictor: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊