# Poimen Memory - Environment Configuration Guide

All downstream service URIs are read from environment variables, sourced from ConfigMap.

## How It Works

1. **ConfigMap provides URIs**: `k8s/app/config.yaml` (production, SOPS-encrypted)
2. **Deployment injects via envFrom**: `envFrom: configMapRef: poimen-memory-config`
3. **Application reads from ENV**: Code parses `LLM_ENDPOINT`, `OPENSEARCH_HOST`, `AUTHENTIK_ISSUER`, etc.

```yaml
# deployment.yaml
envFrom:
  - configMapRef:
      name: poimen-memory-config  # All vars injected as ENV
```

## Environment Variables

### LLM Service (Entity & Fact Extraction)
- `LLM_ENDPOINT` — full URL to chat/completions endpoint
- `LLM_API_BASE` — base API URL (used for client initialization)
- `LLM_MODEL` — model identifier (ornith:35b, qwen:7b, etc.)
- `LLM_TIMEOUT_SECS` — timeout for LLM requests
- `ENABLE_LLM_EXTRACTION` — enable/disable LLM extraction (true/false)

### OpenSearch (Vector Store, BM25)
- `OPENSEARCH_HOST` — hostname:port
- `OPENSEARCH_SCHEME` — http or https
- `OPENSEARCH_VERIFY_CERTS` — SSL certificate verification (true/false)

### Authentik (OIDC)
- `AUTHENTIK_ISSUER` — OIDC issuer URL
- `AUTHENTIK_VERIFY_SSL` — SSL certificate verification (true/false)
- `MEM_AUTH_MODE` — auth mode: jwt | apikey | none

### Temporal (Workflow Orchestration - Future)
- `TEMPORAL_ENDPOINT` — temporal frontend hostname:port
- `TEMPORAL_NAMESPACE` — temporal namespace

### API Gateway (Route Optimization - Future)
- `GATEWAY_URL` — gateway base URL

### Memory Service Config
- `MEM_AUTH_MODE` — jwt | apikey | none
- `MEM_RATE_LIMIT_INGEST` — ingest requests per second
- `MEM_RATE_LIMIT_QUERY` — query requests per second
- `MEM_EMBEDDING_BATCH_SIZE` — batch size for embeddings

---

## Deployment Scenarios

### Production (SOPS-Encrypted ConfigMap)

**File**: `k8s/app/config.yaml`

Services use cluster-internal DNS:
```yaml
LLM_ENDPOINT: http://reasoning-predictor.llm-serving.svc.cluster.local:8000/v1/chat/completions
OPENSEARCH_HOST: opensearch.poimen.svc.cluster.local:9200
AUTHENTIK_ISSUER: https://authentik.auth.svc.cluster.local:9443/application/o/poimen/
TEMPORAL_ENDPOINT: temporal-frontend.temporal.svc.cluster.local:7233
GATEWAY_URL: http://api-gw.poimen.svc.cluster.local:8080
MEM_AUTH_MODE: jwt
```

**Deploy**:
```bash
# SOPS auto-decrypts based on .sops.yaml age key
kubectl apply -f k8s/app/config.yaml -k k8s/app/
```

### Local/Development (Plaintext ConfigMap)

**File**: `k8s/app/config.local.yaml`

Services via external URLs (ingress):
```yaml
LLM_ENDPOINT: https://api.riotpiao.com/v1/chat/completions
OPENSEARCH_HOST: opensearch.riotpiao.com:443
AUTHENTIK_ISSUER: https://authentik.riotpiao.com/application/o/poimen/
TEMPORAL_ENDPOINT: temporal.riotpiao.com:443
GATEWAY_URL: https://api.riotpiao.com
MEM_AUTH_MODE: none
```

**Deploy** (override production config):
```bash
# Delete prod config, apply local
kubectl delete configmap poimen-memory-config -n poimen
kubectl apply -f k8s/app/config.local.yaml
```

---

## Encrypting with SOPS

Production `config.yaml` is encrypted with SOPS (Age-based).

**Encrypt**:
```bash
sops -e k8s/app/config.yaml > k8s/app/config.yaml.enc
mv k8s/app/config.yaml.enc k8s/app/config.yaml
```

**Decrypt for editing** (SOPS auto-handles with $EDITOR):
```bash
sops k8s/app/config.yaml
```

**View decrypted** (without editing):
```bash
sops -d k8s/app/config.yaml
```

**.sops.yaml** defines encryption key:
```yaml
creation_rules:
  - path_regex: k8s/app/config.yaml
    key_groups:
      - age:
          - <age-public-key>
```

---

## Application Code Pattern

Example: Application should read URIs from ENV at startup.

```rust
// Pseudocode
let llm_endpoint = env::var("LLM_ENDPOINT")
    .unwrap_or("http://localhost:11434/v1/chat/completions".to_string());
let opensearch_host = env::var("OPENSEARCH_HOST")
    .unwrap_or("localhost:9200".to_string());
let auth_mode = env::var("MEM_AUTH_MODE")
    .unwrap_or("none".to_string());

// Initialize clients with these URIs
let llm_client = LlmClient::new(llm_endpoint)?;
let search_client = OpenSearchClient::new(opensearch_host)?;
```

---

## Summary

| Aspect | Production | Local |
|--------|-----------|-------|
| **Config File** | `config.yaml` | `config.local.yaml` |
| **Encryption** | SOPS (Age) | Plaintext |
| **Service URIs** | Cluster-internal DNS | External HTTPS |
| **Auth Mode** | JWT (Authentik) | None (disabled) |
| **Rate Limits** | 100/1000 | 1000/10000 |
| **Deploy** | `kubectl apply -k k8s/app/` | `kubectl apply -f config.local.yaml` |