Tracking: Valkey multi-instance

> [!NOTE]
> Migrated from [augurlabs/augur#3262](https://github.com/augurlabs/augur/issues/3262)
> Originally opened by `@MoralCode` on 2025-09-09

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Opening this issue to track valkey support covering both regular usage and in production/cloud deployments.

**Single instance**

From what ive heard, valkey should just be a drop-in replacement in the compose stack

**Production/multi-instance**

Seems like valkey can be run in a cluster mode through its Sentinel feature (https://valkey.io/topics/sentinel/).

To do this, There may need to be special behavior/connection parameters augur has to support (per @JohnStrunk in https://github.com/JohnStrunk/augur-on-ocp/issues/22)

Maybe this is the correct document?
https://valkey.io/topics/sentinel-clients/