> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hexr.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Valkey

> In-cluster cache for L2 credentials, A2A task state, and tool registry data.

## What It Does

Valkey (Redis-compatible) serves as the shared in-cluster cache:

| Usage                   | Description                                              |
| ----------------------- | -------------------------------------------------------- |
| **L2 credential cache** | Cached cloud credentials shared across pods              |
| **A2A task state**      | Task status and results for agent-to-agent communication |
| **Tool registry**       | Cached tool definitions from the Gateway                 |
| **Rate limiting**       | Per-tenant and per-agent rate limit counters             |

***

## Why Valkey

Valkey is the open-source fork of Redis (post-license change). It is:

* 100% Redis protocol compatible
* Apache 2.0 licensed
* Drop-in replacement with no code changes

***

## Configuration

Deployed as a single-instance StatefulSet in `hexr-system`:

```yaml theme={null}
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: valkey
  namespace: hexr-system
spec:
  replicas: 1
  template:
    spec:
      containers:
        - name: valkey
          image: valkey/valkey:8
          ports:
            - containerPort: 6379
          args:
            - "--maxmemory"
            - "256mb"
            - "--maxmemory-policy"
            - "allkeys-lru"
```

***

## Access

All platform services connect to `valkey.hexr-system.svc:6379`. No authentication is required within the cluster (mTLS provides service-level auth).