# APT Cache Server Integration

This document describes the integration of your APT cache server (`http://192.168.1.79:3142`) with the Deb-Mock CI/CD workflows.

## Overview

The CI/CD workflows now use your APT cache server to speed up package installations and reduce bandwidth usage during builds.

## Configuration

### APT Cache Server Setup

Your APT cache server is configured at:
- **URL**: `http://192.168.1.79:3142`
- **Type**: apt-cacher-ng (based on the `/acng-report.html` endpoint)
- **Status**: Available and accessible

### CI/CD Integration

The APT cache is configured in all CI/CD workflows:

```yaml
- name: Install build dependencies
  run: |
    # Configure APT to use your cache server
    echo 'Acquire::http::Proxy "http://192.168.1.79:3142";' | sudo tee /etc/apt/apt.conf.d/99proxy
    echo 'Acquire::https::Proxy "http://192.168.1.79:3142";' | sudo tee -a /etc/apt/apt.conf.d/99proxy
    
    sudo apt update
    sudo apt install -y build-essential devscripts debhelper dh-python python3-all python3-setuptools
    sudo apt install -y sbuild schroot debootstrap
```

### Workflows Using APT Cache

1. **build-deb.yml**: Package building workflow
2. **test.yml**: Testing workflow
3. **build.yml**: Basic build workflow

## Benefits

### 1. **Speed Improvements**
- Faster package downloads during CI/CD runs
- Reduced build times for subsequent runs
- Cached packages don't need to be downloaded again

### 2. **Bandwidth Savings**
- Reduces external bandwidth usage
- Local caching of frequently used packages
- Efficient for multiple builds

### 3. **Reliability**
- Reduces dependency on external package mirrors
- Faster recovery from network issues
- Consistent package availability

## Monitoring

### Cache Server Status

You can monitor your cache server at:
- **Status Page**: http://192.168.1.79:3142/acng-report.html
- **Statistics**: Cache hit rates and bandwidth usage
- **Configuration**: Server settings and policies

### CI/CD Logs

The CI/CD logs will show:
- APT cache configuration messages
- Package download speeds
- Cache hit/miss statistics (if available)

## Troubleshooting

### Common Issues

1. **Cache Server Unavailable**
   - CI/CD will fall back to direct downloads
   - Builds will still succeed but may be slower

2. **Cache Misses**
   - New packages will be downloaded and cached
   - Subsequent builds will benefit from caching

3. **Configuration Errors**
   - APT will ignore invalid proxy settings
   - Builds will continue with direct downloads

### Debug Commands

```bash
# Test cache server connectivity
curl -I http://192.168.1.79:3142/acng-report.html

# Check APT proxy configuration
cat /etc/apt/apt.conf.d/99proxy

# Test package download through cache
sudo apt update
```

## Future Enhancements

### Potential Improvements

1. **Cache Statistics Integration**
   - Display cache hit rates in CI/CD logs
   - Monitor cache effectiveness

2. **Fallback Configuration**
   - Automatic fallback to direct downloads
   - Health checks for cache server

3. **Cache Warming**
   - Pre-download common packages
   - Optimize cache for Deb-Mock builds

## References

- [apt-cacher-ng Documentation](https://www.unix-ag.uni-kl.de/~bloch/acng/)
- [APT Proxy Configuration](https://wiki.debian.org/AptProxy)
- [Forgejo CI/CD Documentation](https://forgejo.org/docs/latest/user/actions/)