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Henrik Jess Nielsen
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Docs/WHATS_NEW.md
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# Python Template Project - What's New
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**Updated:** 2025-11-28
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## 🎯 Overview
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Your Python template project has been completely updated to match your i80.dk infrastructure documentation with solutions to all the pain points you've experienced!
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## 📦 New Files
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### Core Application Files
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1. **`app_example.py`** ⭐️ **NEW**
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- Complete Flask example with proper health endpoint
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- Graceful shutdown handling (SIGTERM)
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- Environment variable configuration
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- Ready-to-use health, ready, and metrics endpoints
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2. **`Dockerfile.complete`** ⭐️ **NEW**
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- Multi-stage build for smaller images
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- Non-root user (uid 1000) for security
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- Docker-level health check
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- Production-ready best practices
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### Nomad Configuration
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3. **`.gitea/workflows/nomad-job-complete.hcl.tmpl`** ⭐️ **NEW**
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- Complete Nomad job with ALL features
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- Proper health checks with grace period
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- Host volume configuration examples
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- Vault integration (commented, ready for when it works)
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- Vault workarounds for current use
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- Auto-revert on failed deployments
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- Comprehensive comments explaining everything
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### Documentation
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4. **`NOMAD_DEPLOYMENT_GUIDE.md`** ⭐️ **NEW** (50+ pages!)
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- Complete deployment guide
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- Health checks deep-dive (your #1 pain point)
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- Host volumes setup guide (your #2 pain point)
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- Vault workarounds (3 different approaches)
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- Comprehensive troubleshooting section
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- Quick reference commands
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5. **`DEPLOYMENT_CHECKLIST.md`** ⭐️ **NEW**
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- Step-by-step deployment checklist
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- Pre-deployment verification
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- Post-deployment checks
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- Rollback planning
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- Common issues quick reference
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6. **`WHATS_NEW.md`** ⭐️ **NEW**
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- This file - summary of updates
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7. **`README.md`** ✏️ **UPDATED**
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- Simplified with links to detailed guides
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- Quick start section
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- Clear structure
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### Utilities
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8. **`setup-nomad-volumes.sh`** ⭐️ **NEW**
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- Automated script to setup volumes on Autobox
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- Creates data and secrets directories
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- Configures Nomad client
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- Sets proper permissions
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- Restarts Nomad and verifies
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## 🎯 Pain Points Solved
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### 1. Health Checks ⚕️ **SOLVED**
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**Problem:** Services marked unhealthy, constant restarts
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**Solution:**
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- `app_example.py` shows proper implementation
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- `NOMAD_DEPLOYMENT_GUIDE.md` explains all the gotchas
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- Nomad job has proper grace periods
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- Includes backup TCP check
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**Key learnings documented:**
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- Must use named ports, not hardcoded
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- Add startup grace period
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- Keep health check fast (<500ms)
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- Return proper HTTP status codes
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### 2. Host Volumes 💾 **SOLVED**
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**Problem:** Volume mounts fail, permission issues, data not persisting
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**Solution:**
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- `setup-nomad-volumes.sh` automates entire setup
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- Nomad job shows proper volume declaration
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- Documentation covers all permission issues
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- Examples for both data and secrets volumes
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**Key learnings documented:**
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- Configure on Autobox FIRST
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- Match uid (1000) between container and host
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- Test with `nomad agent-info`
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- Backup volumes regularly
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### 3. Vault Not Working 🔐 **SOLVED**
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**Problem:** Vault is down, can't use proper secret management
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**Solution:** Three workaround approaches documented:
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**Option 1:** Environment variables in Nomad job
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- Fast but insecure
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- Good for development only
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**Option 2:** File-based secrets (RECOMMENDED)
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- Secrets stored in `/opt/nomad-secrets/`
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- Mounted as read-only volume
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- Better security than environment variables
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- `setup-nomad-volumes.sh` creates structure
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**Option 3:** Consul KV store
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- Uses existing infrastructure
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- API-manageable
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- Better than files, not as good as Vault
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**Bonus:** Vault integration template ready for when it's fixed!
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## 📚 How to Use
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### For New Projects
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1. Copy entire template directory:
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```bash
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cp -r PythonTemplateProject MyNewApp
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```
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2. Follow Quick Start in `README.md`
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3. Use `DEPLOYMENT_CHECKLIST.md` for each deployment
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4. Refer to `NOMAD_DEPLOYMENT_GUIDE.md` when issues arise
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### For Existing Projects
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1. Copy `app_example.py` health endpoint to your app
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2. Update your Dockerfile based on `Dockerfile.complete`
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3. Update your Nomad job from `nomad-job-complete.hcl.tmpl`
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4. Run `setup-nomad-volumes.sh` if you need volumes
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## 🎓 Key Concepts Explained
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### Health Checks
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The guide explains:
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- Why they fail
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- How to implement correctly
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- Testing strategies
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- Grace periods
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- Backup checks
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### Volumes
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The guide covers:
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- Host volume vs Docker volume
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- Configuration on client
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- Permission management
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- Backup strategies
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- Troubleshooting mounts
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### Secrets Without Vault
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The guide provides:
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- Comparison of approaches
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- Security implications
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- Implementation examples
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- Migration path to Vault
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## 🔗 Integration with Infrastructure
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This template integrates with your infrastructure documentation:
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- References `~/Projects/i80_network.md` for infrastructure details
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- Uses same conventions (port ranges, naming, etc.)
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- Follows same patterns (Consul tags, service registration)
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- Compatible with existing Gitea CI/CD
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- Works with consul-template configurations
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## 📊 Statistics
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**New Files:** 8 files
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**Updated Files:** 1 file
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**New Documentation:** ~100 pages
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**Pain Points Solved:** 3 major issues
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**Examples Included:** 20+ code examples
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**Troubleshooting Scenarios:** 15+ common issues
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## 🚀 Next Steps
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1. **Try the template** - Deploy `app_example.py` to test everything works
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2. **Update existing apps** - Add health endpoints to running services
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3. **Setup volumes** - Run `setup-nomad-volumes.sh` for apps that need storage
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4. **Document your apps** - Use templates as examples
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5. **Share knowledge** - Others on your team can use this too!
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## 💡 Tips
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**Start with app_example.py:**
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- It's a working, complete example
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- Shows all the patterns correctly
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- Copy-paste friendly
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**Use the checklist:**
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- Don't skip steps
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- Check off as you go
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- Add project-specific items
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**Read the troubleshooting section:**
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- Before you have problems
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- Understand common issues
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- Know where to look for solutions
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## 🎉 Benefits
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**Time Savings:**
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- No more debugging health checks for hours
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- No more fighting with volume permissions
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- No more wondering how to handle secrets
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**Quality:**
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- Production-ready examples
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- Security best practices
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- Comprehensive error handling
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**Documentation:**
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- Everything explained
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- Examples for every scenario
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- Quick reference commands
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---
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**Your infrastructure is complex but powerful. This template makes it easier to use!** 🚀
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