Redis

Redis is used as a fast in‑memory key‑value store for caching and persistence.
Two instances are provided to separate volatile and durable data usage.

Instances

cache — ephemeral, non‑persistent store (port 6379, socket /run/redis/redis-cache.sock)
Used for transient application caching, sessions, and short‑lived data.
persist — durable store with on‑disk persistence (port 6380, socket /run/redis/redis-persist.sock)
Intended for queues, background jobs, or data that must survive restarts.

Configuration

Host variables:

redis:
  enable: true    # required to deploy Redis
  type: redis     # optional; valid values: redis | valkey

Defaults

redis.enable: not set (role disabled)
redis.type: redis

When redis.enable is omitted, no Redis packages or instances are configured.

Sockets and Ports

Instance	Socket Path	Port	Persistence
cache	`/run/redis/redis-cache.sock`	6379	none
persist	`/run/redis/redis-persist.sock`	6380	yes (RDB)

User Access

Applications can connect via UNIX sockets (preferred for local access) or TCP (localhost on respective ports).

Example:

redis-cli -s /run/redis/redis-cache.sock