# API7 Enterprise Edition Helm Chart

This Helm chart deploys the API7 Enterprise Edition demo application, consisting of a Web frontend and API backend service.

## Prerequisites

- Kubernetes 1.19+
- Helm 3.8.0+
- PV provisioner support in the underlying infrastructure (optional)
- Ingress controller (e.g., NGINX Ingress Controller)

## Installation

### Add the Helm repository (if published)

```bash
helm repo add api7ee https://git.commandware.com/api/packages/demos/helm
helm repo update
```

### Install the chart

```bash
# Install with default values
helm install my-api7ee ./helm/api7ee-demo-k8s-demo-k8s

# Install in a specific namespace
helm install my-api7ee ./helm/api7ee-demo-k8s-demo-k8s --namespace api7ee --create-namespace

# Install with custom values file
helm install my-api7ee ./helm/api7ee-demo-k8s-demo-k8s -f custom-values.yaml
```

## Configuration

### API7 Gateway Integration

This Helm chart includes automatic API7 Gateway configuration using ADC (API7 Declarative CLI). When `api7.enabled` is set to `true`, the chart will:

1. **Deploy ADC Configuration**: Creates routes, services, and upstreams for your applications
2. **Configure TLS/SSL**: Manages certificates via cert-manager or custom certificates
3. **Enable Service Discovery**: Uses Kubernetes native service discovery
4. **Apply Security Policies**: Configures rate limiting, CORS, and authentication
5. **Auto-publish Routes**: Optionally publishes routes automatically after deployment

### Key Configuration Options

| Parameter | Description | Default |
|-----------|-------------|---------|
| `web.enabled` | Enable Web component | `true` |
| `web.replicaCount` | Number of Web replicas | `2` |
| `web.image.repository` | Web image repository | `api7ee/web` |
| `web.image.tag` | Web image tag | `main` |
| `web.service.port` | Web service port | `8000` |
| `api.enabled` | Enable API component | `true` |
| `api.replicaCount` | Number of API replicas | `3` |
| `api.image.repository` | API image repository | `api7ee/api` |
| `api.image.tag` | API image tag | `main` |
| `api.service.port` | API service port | `8080` |
| `ingress.enabled` | Enable ingress | `true` |
| `ingress.hosts[0].host` | Ingress hostname | `demo.commandware.it` |
| `api7.enabled` | Enable API7 ADC configuration | `true` |
| `api7.gateway.adminUrl` | API7 Gateway Admin API URL | `http://api7-gateway.api7ee:9180` |
| `api7.hosts` | Hosts for API7 routing | `[demo.commandware.it]` |
| `api7.tls.certManager.enabled` | Use cert-manager for TLS | `true` |
| `api7.autoPublish` | Auto-publish routes | `true` |

### Custom Values Examples

#### Configure API7 Gateway:

```yaml
api7:
  enabled: true
  gateway:
    adminUrl: http://your-api7-gateway:9180
    adminKey: "your-admin-key-here"
    group: production
  hosts:
    - api.yourdomain.com
  tls:
    certManager:
      enabled: true
      issuer: letsencrypt-prod
  plugins:
    rateLimit:
      enabled: true
      count: 1000
      timeWindow: 60
    auth:
      enabled: true
  consumers:
    - username: api-client
      apiKey: secure-api-key-12345
```

#### Using a private registry:

```yaml
global:
  imageRegistry: my-registry.example.com
  imagePullSecrets:
    - name: my-registry-secret
```

#### Enabling autoscaling:

```yaml
web:
  autoscaling:
    enabled: true
    minReplicas: 2
    maxReplicas: 10
    targetCPUUtilizationPercentage: 70
```

#### Custom resource limits:

```yaml
api:
  resources:
    limits:
      cpu: 2000m
      memory: 2Gi
    requests:
      cpu: 1000m
      memory: 1Gi
```

## Upgrading

```bash
# Upgrade to a new version
helm upgrade my-api7ee ./helm/api7ee-demo-k8s-demo-k8s

# Upgrade with new values
helm upgrade my-api7ee ./helm/api7ee-demo-k8s-demo-k8s --set web.replicaCount=3
```

## Uninstallation

```bash
# Uninstall the release
helm uninstall my-api7ee

# Uninstall from a specific namespace
helm uninstall my-api7ee --namespace api7ee
```

## Monitoring

If metrics are enabled, the services expose Prometheus-compatible metrics:

```yaml
metrics:
  enabled: true
  serviceMonitor:
    enabled: true
    interval: 30s
```

## Troubleshooting

### API7 ADC Sync Issues

If the ADC sync job fails:

```bash
# Check the job status
kubectl get jobs -l app.kubernetes.io/instance=my-api7ee

# View job logs
kubectl logs job/my-api7ee-adc-sync

# Manually run ADC sync
kubectl run adc-debug --rm -it --image=ghcr.io/api7/adc:latest -- /bin/sh
```

### Verify API7 Configuration

```bash
# Check if routes are configured
curl -H "X-API-KEY: your-admin-key" http://api7-gateway:9180/apisix/admin/routes

# Check service discovery
curl -H "X-API-KEY: your-admin-key" http://api7-gateway:9180/apisix/admin/upstreams
```

### Check deployment status:
```bash
kubectl get deployments -l app.kubernetes.io/instance=my-api7ee
```

### View logs:
```bash
# Web component logs
kubectl logs -l app.kubernetes.io/instance=my-api7ee,app.kubernetes.io/component=web

# API component logs
kubectl logs -l app.kubernetes.io/instance=my-api7ee,app.kubernetes.io/component=api
```

### Check HPA status:
```bash
kubectl get hpa -l app.kubernetes.io/instance=my-api7ee
```

## Security Considerations

- Pod Security Context is configured to run as non-root user (UID 1000)
- Security Context drops all capabilities and prevents privilege escalation
- Read-only root filesystem is enabled
- Network policies can be enabled to restrict traffic

## Support

For issues and questions, please contact support@commandware.com or visit https://git.commandware.com/demos/api7-demo