path: root/STATUS.md

# Project Status Report

**Generated**: 2025-10-26
**Project**: cluster-from-systemd
**Version**: 0.1.0-alpha

## Executive Summary

✅ **Configuration system complete and functional**
✅ **Boot-time detection system implemented**
✅ **All major service units created**
✅ **Configuration validation passing**

## What Works Now

### 1. Configuration Management ✅
- Define entire cluster topology in YAML
- 5 pre-configured node types (master, workers, kafka, storage)
- 5 service configurations (Kubernetes, Ceph, Kafka, MQTT, DNS)
- Comprehensive validation tool catches errors before build

**Test it:**
```bash
python3 tools/validate-config.py configs/
# Output: ✓ Validation PASSED
```

### 2. Node Detection System ✅
- Automatically identifies which node the system is on boot
- Detection methods: MAC address → IP address → hostname → interactive
- Creates symlink to node-specific configuration
- Generates environment files for all services

**Components:**
- `tools/cluster-detect.sh` - Main detection logic
- `tools/generate-environment-files.sh` - Creates .env files
- `systemd/cluster-detect.service` - Runs at early boot

### 3. Role-Based Service Activation ✅
- Maps node roles to systemd targets
- Automatically enables and starts appropriate services
- Supports multi-role nodes (e.g., worker + kafka-broker)

**Role mappings:**
- master → kubernetes-master.target → api-server, scheduler, controller, etcd
- worker → kubernetes-worker.target → kubelet
- kafka-broker → kafka.target → kafka.service
- ceph-osd → ceph-osd.target → ceph-osd@.service

### 4. Systemd Service Units ✅
**11 Service Units Created:**
1. containerd.service - Container runtime
2. kubelet.service - K8s node agent
3. kube-apiserver.service - K8s API server
4. kube-controller-manager.service - K8s controller
5. kube-scheduler.service - K8s scheduler
6. etcd.service - Distributed key-value store
7. kafka.service - Kafka broker (KRaft mode)
8. ceph-mon@.service - Ceph monitor
9. ceph-osd@.service - Ceph OSD
10. mosquitto.service - MQTT broker
11. coredns.service - DNS server

**7 Target Units:**
- kubernetes-master.target
- kubernetes-worker.target
- kafka.target
- ceph-mon.target
- ceph-osd.target
- mqtt.target
- dns.target

### 5. Service Configuration Generators ✅
**8 Configuration Generator Scripts:**
- kubelet-config-generator.sh
- kube-apiserver-config-generator.sh
- etcd-config-generator.sh
- kafka-config-generator.sh
- ceph-mon-init.sh
- ceph-osd-init.sh
- mosquitto-config-generator.sh
- coredns-config-generator.sh

These run at service startup to generate runtime configs from cluster YAML.

## Project Statistics

```
Total Files:        42
Total Lines:        2,064
Configuration:      11 files (cluster + services + nodes)
Systemd Units:      19 files (services + targets)
Scripts:            12 files (bash + python)
Documentation:      4 files (README, spec, schema, implementation)
```

## Architecture Diagram

```
┌──────────────┐
│   ISO Boot   │
└──────┬───────┘
       │
       ▼
┌─────────────────────────┐
│ cluster-detect.service  │  ← Very early boot
│  - Detect node identity │
│  - Generate env files   │
│  - Activate roles       │
└──────┬──────────────────┘
       │
       ▼
┌──────────────────────────────────────────┐
│         Systemd Targets                  │
│  ┌────────────┐  ┌──────────┐           │
│  │ k8s-master │  │ k8s-work │  ┌──────┐ │
│  │  .target   │  │ er.target│  │kafka │ │
│  └─────┬──────┘  └────┬─────┘  │.tgt  │ │
└────────┼──────────────┼────────┴───┬───┘
         │              │            │
         ▼              ▼            ▼
┌─────────────┐  ┌──────────┐  ┌────────┐
│ API Server  │  │ Kubelet  │  │ Kafka  │
│ Controller  │  │          │  │ Broker │
│ Scheduler   │  │          │  │        │
│ etcd        │  │          │  │        │
└─────────────┘  └──────────┘  └────────┘
```

## What's Missing (Critical Path)

### 1. Certificate Generation 🔴
**Priority: CRITICAL**

The Kubernetes components require a full PKI:
- CA certificate and key
- API server certificate
- Kubelet certificates
- etcd certificates
- Service account keys

**Action needed:**
- Script to generate all required certificates
- Distribution to appropriate nodes
- Secure key storage

### 2. Network Configuration 🔴
**Priority: CRITICAL**

Systems need network setup before services start:
- Static IP assignment based on cluster.yaml
- Network interface configuration
- Calico CNI plugin installation
- Pod network CIDR setup

**Action needed:**
- Network configuration script (runs before cluster-detect)
- Calico manifest deployment

### 3. Cluster Bootstrapping 🟡
**Priority: HIGH**

First-time cluster initialization:
- etcd cluster formation (multi-master)
- Kubernetes join tokens for workers
- Ceph monitor quorum setup
- Ceph OSD initialization with devices
- Kafka cluster ID generation

**Action needed:**
- Bootstrap orchestration script
- First-master vs additional-master detection
- Worker join logic

### 4. ISO Builder 🟡
**Priority: HIGH**

Package everything into bootable image:
- Base Fedora/Rocky Linux
- Install all binaries (kubelet, kafka, ceph, etc.)
- Embed configs/ directory
- Install systemd units
- Install scripts to /usr/local/bin/

**Action needed:**
- Kickstart/Anaconda integration
- Image builder script (lorax/mkosi)
- Binary download and packaging

### 5. Post-Install Persistence 🟢
**Priority: MEDIUM**

After detection, persist configuration:
- Save detected identity to disk
- Prevent re-detection on reboot
- Handle re-detection on hardware change

**Action needed:**
- Already partially implemented
- Needs testing and hardening

## Testing Status

| Component | Unit Tests | Integration Tests | E2E Tests |
|-----------|------------|-------------------|-----------|
| Configuration Validation | ✅ Pass | N/A | N/A |
| Node Detection | ⏳ Manual | ❌ Not done | ❌ Not done |
| Role Activation | ⏳ Manual | ❌ Not done | ❌ Not done |
| Service Units | ❌ Not done | ❌ Not done | ❌ Not done |
| Full Boot | ❌ Not done | ❌ Not done | ❌ Not done |

## Development Roadmap

### Phase 1: Make it Boot (Current → Week 2)
- [ ] Certificate generation scripts
- [ ] Network configuration
- [ ] Basic Kubernetes cluster formation
- [ ] ISO builder (basic version)
- [ ] VM testing

### Phase 2: Make it Work (Week 3-4)
- [ ] Ceph cluster initialization
- [ ] Kafka cluster setup
- [ ] Multi-master support
- [ ] Worker join automation
- [ ] End-to-end testing

### Phase 3: Make it Production-Ready (Week 5-8)
- [ ] Monitoring integration
- [ ] Logging aggregation
- [ ] Update mechanism
- [ ] Backup and restore
- [ ] Security hardening
- [ ] Documentation

## Current Limitations

1. **No actual cluster bootstrap** - Services won't start without certs/config
2. **Single master only** - Multi-master etcd not configured
3. **No CNI** - Pod networking won't work
4. **Manual certificate creation** - Must be done out of band
5. **No ISO builder** - Can't create bootable image yet
6. **No network setup** - Assumes pre-configured networking
7. **Ceph incomplete** - Monitor/OSD init are stubs
8. **No secrets management** - Everything in plain text

## How to Test Locally

### Validate Configuration
```bash
python3 tools/validate-config.py configs/
```

### Test Node Detection (Dry Run)
```bash
export CONFIG_DIR=$(pwd)/configs
sudo tools/cluster-detect.sh
# Will attempt MAC/IP detection, fall back to interactive
```

### Inspect Generated Service Files
```bash
ls -la systemd/
cat systemd/kubelet.service
cat systemd/kubernetes-master.target
```

### Review Configuration Generators
```bash
ls -la tools/*-generator.sh
cat tools/kafka-config-generator.sh
```

## Next Session Goals

Recommend tackling in this order:

1. **Certificate Generation** (2-3 hours)
   - Write script to generate Kubernetes PKI
   - Store certs in /etc/kubernetes/pki/
   - Add to cluster-detect flow

2. **Network Configuration** (1-2 hours)
   - Script to set static IP from cluster.yaml
   - Configure network interfaces
   - Test on VM

3. **Basic ISO Builder** (3-4 hours)
   - Download Fedora netboot
   - Create kickstart file
   - Package configs and scripts
   - Build test ISO

4. **VM Testing** (2-3 hours)
   - Boot test ISO in VM
   - Verify detection works
   - Check service startup
   - Debug issues

## Questions for Consideration

1. **Certificate strategy**: Generate at build time or first boot?
2. **Multi-master**: How to handle etcd cluster formation?
3. **Secrets**: Use Vault, sealed-secrets, or simple encryption?
4. **Updates**: In-place or blue-green deployment?
5. **Monitoring**: Integrated or separate cluster?

## Conclusion

**The foundation is solid.** We have:
- ✅ Complete configuration system
- ✅ Automatic node detection
- ✅ Role-based service activation
- ✅ All systemd units defined
- ✅ Service configuration generators

**Next critical steps:**
1. Certificate generation
2. Network setup
3. ISO builder
4. Test in VMs

The project is well-positioned to become a working prototype with 8-16 more hours of focused development.

---

**Want to continue?** Recommend starting with certificate generation scripts next.