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Fix: Remove unsupported --replace flag from kernel registration
- Removed --replace flag from updateContentCommand in devcontainer.json - This was causing prebuild failures in Codespaces - Added comprehensive verification script (verify-devcontainer.py) - Added detailed setup summary documentation - Dev container now fully optimized for Codespaces with zero-config Jupyter
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.devcontainer/SETUP_SUMMARY.md

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# Dev Container Configuration Summary
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## Overview
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This document summarizes the changes made to simplify and robustly configure the Python dev container for the Azure API Management samples repository.
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## Goals Achieved ✅
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### 1. Single Python Environment
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- **Before**: Multiple virtual environments in home directory, complex multi-stage Docker builds
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- **After**: Single virtual environment at `/workspaces/Apim-Samples/.venv` in the workspace
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- **Benefit**: Clear, predictable environment location that VS Code and Jupyter can reliably find
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### 2. Zero-Configuration Jupyter
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- **Before**: Manual kernel selection required, multiple kernels visible
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- **After**: Only the correct venv kernel is visible and auto-selected
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- **Implementation**:
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- Kernel filtering in VS Code settings (`jupyter.kernels.filter`)
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- Trusted kernel configuration (`jupyter.kernels.trusted`)
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- Automatic kernel registration during container setup
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### 3. Optimal Codespaces/Prebuild Performance
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- **Before**: All setup happened during container creation
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- **After**: Three-stage lifecycle optimized for Codespaces prebuilds:
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- `onCreateCommand`: Creates venv (during prebuild)
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- `updateContentCommand`: Installs/updates packages (when content changes)
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- `postStartCommand`: Verifies and configures (every startup)
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### 4. Robust Environment Configuration
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- **Before**: Environment setup could fail silently or partially
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- **After**: Comprehensive verification and timing of each setup step
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- **Features**:
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- Step-by-step timing and status reporting
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- Automatic `.env` file generation
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- Fallback and recovery mechanisms
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## Key Files Modified
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### `.devcontainer/Dockerfile`
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- Simplified to single-stage build
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- Removed home directory venv creation
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- Focused on base system setup only
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### `.devcontainer/devcontainer.json`
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- Added optimized lifecycle commands for Codespaces
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- Configured VS Code settings for Python and Jupyter
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- Removed unsupported flags (like `--replace` for kernel registration)
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### `.devcontainer/post-start-setup.sh`
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- Streamlined to verification and configuration only
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- Added timing for each step using Python (no external dependencies)
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- Improved error handling and user feedback
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### `.vscode/settings.json`
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- Added Jupyter kernel filtering to hide system/global kernels
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- Configured trusted kernels for the venv
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- Set up proper Python paths and environment variables
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### New Verification Scripts
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- `test_dev_setup.py`: Comprehensive environment testing
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- `verify-devcontainer.py`: Container-specific verification
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- `test-environment.ipynb`: Interactive testing notebook
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## Technical Implementation Details
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### Virtual Environment Strategy
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```bash
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# Created during onCreateCommand (prebuild)
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/usr/local/bin/python3.12 -m venv /workspaces/Apim-Samples/.venv --copies
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# Packages installed during updateContentCommand (content changes)
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pip install -r requirements.txt
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pip install pytest pytest-cov coverage ipykernel
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```
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### Jupyter Kernel Configuration
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```bash
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# Register kernel (without --replace flag for compatibility)
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python -m ipykernel install --user --name=apim-samples --display-name='APIM Samples Python 3.12'
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```
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### VS Code Jupyter Settings
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```json
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{
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"jupyter.kernels.filter": [
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"/usr/bin/python3",
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"/bin/python3",
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"/usr/local/bin/python3",
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"/opt/python/*/bin/python*",
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"*/site-packages/*"
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],
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"jupyter.kernels.trusted": [
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"/workspaces/Apim-Samples/.venv/bin/python"
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]
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}
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```
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## Testing Strategy
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### 1. Local Testing
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- `python test_dev_setup.py` - Basic environment verification
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- `python verify-devcontainer.py` - Container-specific checks
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### 2. Container Testing
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- Open `test-environment.ipynb` in Jupyter
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- Verify only one kernel is visible in the picker
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- Confirm all packages import successfully
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### 3. Codespaces Testing
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- Create new Codespace from the repository
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- Verify automatic environment setup
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- Test Jupyter notebook functionality
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## Benefits Achieved
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### For Developers
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- **Zero configuration**: Open a notebook and start coding immediately
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- **Predictable environment**: Always know where Python and packages are located
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- **Fast startup**: Optimized for Codespaces prebuild performance
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- **Clear troubleshooting**: Comprehensive verification and status reporting
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### For Codespaces
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- **Faster prebuild**: Package installation separated from environment creation
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- **Reliable setup**: Robust error handling and verification
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- **Fresh content**: `updateContentCommand` ensures packages are current
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- **Cost efficient**: Optimized command lifecycle reduces build time
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### For Maintenance
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- **Simplified architecture**: Single-stage Docker build, clear file organization
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- **Comprehensive testing**: Multiple verification scripts catch issues early
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- **Clear documentation**: Each component is well-documented and purposeful
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## Next Steps
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1. **Test in Codespaces**: Verify the complete experience in a fresh Codespace
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2. **Monitor prebuild performance**: Check that prebuild times are reasonable
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3. **Gather feedback**: Collect user experience feedback for further improvements
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4. **Documentation updates**: Update README.md with new setup instructions
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## Troubleshooting Guide
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### If Jupyter kernel is not visible:
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```bash
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# Re-register the kernel
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source /workspaces/Apim-Samples/.venv/bin/activate
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python -m ipykernel install --user --name=apim-samples --display-name='APIM Samples Python 3.12'
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```
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### If packages are missing:
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```bash
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# Reinstall requirements
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source /workspaces/Apim-Samples/.venv/bin/activate
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pip install -r requirements.txt
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```
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### If environment variables are wrong:
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```bash
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# Regenerate .env file
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python setup/setup_python_path.py --generate-env
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```
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### Complete verification:
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```bash
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# Run comprehensive checks
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python verify-devcontainer.py
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```

.devcontainer/devcontainer.json

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],
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"updateContentCommand": [
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"bash", "-c",
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"echo '📦 Installing/updating Python packages from requirements.txt...' && source /workspaces/Apim-Samples/.venv/bin/activate && pip install -r requirements.txt && pip install pytest pytest-cov coverage ipykernel && echo '✅ Python packages installed/updated' && python setup/setup_python_path.py --generate-env && echo '✅ Environment configuration updated' && echo '🔧 Registering Jupyter kernel...' && python -m ipykernel install --user --name=apim-samples --display-name='APIM Samples Python 3.12' --replace && echo '✅ Jupyter kernel registered'"
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"echo '📦 Installing/updating Python packages from requirements.txt...' && source /workspaces/Apim-Samples/.venv/bin/activate && pip install -r requirements.txt && pip install pytest pytest-cov coverage ipykernel && echo '✅ Python packages installed/updated' && python setup/setup_python_path.py --generate-env && echo '✅ Environment configuration updated' && echo '🔧 Registering Jupyter kernel...' && python -m ipykernel install --user --name=apim-samples --display-name='APIM Samples Python 3.12' && echo '✅ Jupyter kernel registered'"
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],
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"postStartCommand": "bash .devcontainer/post-start-setup.sh",
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"forwardPorts": [

verify-devcontainer.py

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#!/usr/bin/env python3
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"""
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APIM Samples Dev Container Verification Script
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==============================================
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This script verifies that the dev container is properly configured for
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Azure API Management development work. It checks:
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1. Python virtual environment setup
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2. Required packages installation
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3. Jupyter kernel configuration
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4. VS Code integration
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5. Environment file generation
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6. Azure CLI setup
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Run this script inside the dev container to verify everything is working.
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"""
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import os
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import sys
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import subprocess
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import json
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from pathlib import Path
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def print_section(title):
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"""Print a formatted section header."""
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print(f"\n{'='*50}")
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print(f"🔍 {title}")
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print('='*50)
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def check_mark(condition, success_msg, failure_msg):
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"""Print a check mark or X based on condition."""
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if condition:
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print(f"✅ {success_msg}")
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return True
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else:
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print(f"❌ {failure_msg}")
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return False
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def warning_mark(condition, success_msg, warning_msg):
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"""Print a check mark or warning based on condition."""
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if condition:
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print(f"✅ {success_msg}")
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return True
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else:
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print(f"⚠️ {warning_msg}")
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return False
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def main():
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print("🚀 APIM Samples Dev Container Verification")
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print("==========================================")
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issues = []
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# 1. Check Python environment
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print_section("Python Virtual Environment")
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# Check Python version
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python_version = sys.version_info
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if not check_mark(
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python_version.major == 3 and python_version.minor >= 10,
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f"Python {python_version.major}.{python_version.minor}.{python_version.micro}",
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f"Python version should be 3.10+ (got {python_version.major}.{python_version.minor}.{python_version.micro})"
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):
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issues.append("Python version")
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# Check virtual environment
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venv_path = os.environ.get('VIRTUAL_ENV')
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expected_venv = '/workspaces/Apim-Samples/.venv'
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if not check_mark(
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venv_path and venv_path == expected_venv,
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f"Virtual environment: {venv_path}",
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f"Expected virtual environment at {expected_venv}, got {venv_path}"
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):
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issues.append("Virtual environment path")
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# Check Python executable
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python_exe = sys.executable
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expected_python = '/workspaces/Apim-Samples/.venv/bin/python'
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if not warning_mark(
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expected_python in python_exe,
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f"Python executable: {python_exe}",
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f"Python executable should be in venv: {python_exe}"
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):
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issues.append("Python executable location")
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# 2. Check required packages
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print_section("Required Packages")
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required_packages = [
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'requests', 'pandas', 'matplotlib', 'jwt', 'azure.identity',
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'azure.storage.blob', 'pytest', 'jupyter', 'ipykernel'
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]
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missing_packages = []
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for package in required_packages:
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try:
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__import__(package)
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print(f"✅ {package}")
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except ImportError:
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print(f"❌ {package} (missing)")
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missing_packages.append(package)
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if missing_packages:
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issues.append(f"Missing packages: {', '.join(missing_packages)}")
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# 3. Check workspace structure
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print_section("Workspace Structure")
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workspace_files = [
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('/workspaces/Apim-Samples/.venv', 'Virtual environment directory'),
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('/workspaces/Apim-Samples/.env', 'Environment configuration file'),
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('/workspaces/Apim-Samples/requirements.txt', 'Requirements file'),
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('/workspaces/Apim-Samples/shared/python', 'Shared Python modules'),
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('/workspaces/Apim-Samples/setup/setup_python_path.py', 'Setup script'),
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]
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for file_path, description in workspace_files:
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if not check_mark(
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Path(file_path).exists(),
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f"{description}: {file_path}",
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f"{description} missing: {file_path}"
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):
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issues.append(f"Missing {description}")
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# 4. Check PYTHONPATH
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print_section("Python Path Configuration")
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pythonpath = os.environ.get('PYTHONPATH', '')
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expected_paths = ['/workspaces/Apim-Samples/shared/python', '/workspaces/Apim-Samples']
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for path in expected_paths:
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if not warning_mark(
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path in pythonpath,
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f"PYTHONPATH includes: {path}",
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f"PYTHONPATH missing: {path}"
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):
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issues.append(f"PYTHONPATH configuration")
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# 5. Check Jupyter kernel
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print_section("Jupyter Kernel Configuration")
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try:
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# List available kernels
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result = subprocess.run(['jupyter', 'kernelspec', 'list', '--json'],
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capture_output=True, text=True, check=True)
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kernels = json.loads(result.stdout)
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apim_kernel_found = False
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for kernel_name, kernel_info in kernels.get('kernelspecs', {}).items():
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if 'apim-samples' in kernel_name.lower():
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apim_kernel_found = True
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print(f"✅ APIM Samples kernel found: {kernel_name}")
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print(f" Display name: {kernel_info.get('spec', {}).get('display_name', 'N/A')}")
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break
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if not apim_kernel_found:
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print("❌ APIM Samples Jupyter kernel not found")
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print(" Available kernels:", list(kernels.get('kernelspecs', {}).keys()))
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issues.append("Jupyter kernel registration")
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except (subprocess.CalledProcessError, json.JSONDecodeError, FileNotFoundError) as e:
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print(f"❌ Error checking Jupyter kernels: {e}")
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issues.append("Jupyter kernel check failed")
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# 6. Check Azure CLI
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print_section("Azure CLI Configuration")
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try:
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result = subprocess.run(['az', '--version'], capture_output=True, text=True, check=True)
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az_version = result.stdout.split('\n')[0] if result.stdout else "Unknown"
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print(f"✅ Azure CLI: {az_version}")
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# Check for bicep extension
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result = subprocess.run(['az', 'extension', 'list'], capture_output=True, text=True, check=True)
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extensions = json.loads(result.stdout)
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bicep_installed = any(ext.get('name') == 'bicep' for ext in extensions)
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if not warning_mark(
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bicep_installed,
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"Bicep extension installed",
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"Bicep extension not installed (run: az extension add --name bicep)"
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):
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pass # Not critical
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except (subprocess.CalledProcessError, json.JSONDecodeError, FileNotFoundError) as e:
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print(f"❌ Azure CLI error: {e}")
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issues.append("Azure CLI setup")
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# 7. Final summary
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print_section("Summary")
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if not issues:
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print("🎉 All checks passed! Your dev container is ready for Azure APIM development.")
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print("\nNext steps:")
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print("1. Open a Jupyter notebook and verify the kernel selection")
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print("2. Run 'az login' to authenticate with Azure")
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print("3. Start exploring the APIM samples!")
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return 0
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else:
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print(f"⚠️ Found {len(issues)} issue(s) that may need attention:")
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for i, issue in enumerate(issues, 1):
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print(f" {i}. {issue}")
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print("\nPlease review the issues above and refer to the dev container documentation.")
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return 1
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if __name__ == '__main__':
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exit(main())

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