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Complete Docker build stabilization with GHCR publishing and smoke tests
Co-authored-by: jongalloway <[email protected]>
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‎.github/workflows/build.yml‎

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@@ -352,6 +352,25 @@ jobs:
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- name: Set up Docker Buildx
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uses: docker/setup-buildx-action@v3
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- name: Log in to GitHub Container Registry
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uses: docker/login-action@v3
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with:
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registry: ghcr.io
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username: ${{ github.actor }}
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password: ${{ secrets.GITHUB_TOKEN }}
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- name: Extract metadata for Docker
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id: meta
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uses: docker/metadata-action@v5
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with:
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images: ghcr.io/${{ github.repository }}/demo
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tags: |
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type=ref,event=branch
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type=ref,event=pr
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type=semver,pattern={{version}}
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type=semver,pattern={{major}}.{{minor}}
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type=raw,value=latest,enable={{is_default_branch}}
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- name: Build Docker image (test build)
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run: |
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echo "🐳 Building Docker image for testing..."
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docker run -d --name nlwebnet-test -p 8080:8080 nlwebnet-demo:test
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# Wait for container to start
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sleep 5
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sleep 10
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# Check if container is running (basic test)
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if docker ps | grep nlwebnet-test; then
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echo "✅ Container is running"
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# Test health endpoint if available
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echo "🔍 Testing health endpoint..."
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for i in {1..5}; do
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if curl -f -s http://localhost:8080/health >/dev/null 2>&1; then
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echo "✅ Health endpoint responds successfully"
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break
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elif [ $i -eq 5 ]; then
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echo "⚠️ Health endpoint not responding (may be expected)"
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else
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echo "⏳ Waiting for health endpoint... (attempt $i/5)"
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sleep 3
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fi
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done
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# Show container logs for debugging
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echo "📋 Container logs:"
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docker logs nlwebnet-test
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echo "📋 Recent container logs:"
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docker logs --tail 10 nlwebnet-test
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else
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echo "❌ Container failed to start"
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docker logs nlwebnet-test
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docker stop nlwebnet-test
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docker rm nlwebnet-test
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- name: Build and push Docker image to GHCR
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uses: docker/build-push-action@v5
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with:
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context: .
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file: deployment/docker/Dockerfile
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push: true
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tags: ${{ steps.meta.outputs.tags }}
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labels: ${{ steps.meta.outputs.labels }}
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cache-from: type=gha
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cache-to: type=gha,mode=max
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- name: Generate deployment summary
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run: |
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echo "## 🐳 Docker Build Summary" >> $GITHUB_STEP_SUMMARY
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echo "- **Image**: \`ghcr.io/${{ github.repository }}/demo\`" >> $GITHUB_STEP_SUMMARY
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echo "- **Tags**: ${{ steps.meta.outputs.tags }}" >> $GITHUB_STEP_SUMMARY
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echo "- **Build Status**: ✅ Success" >> $GITHUB_STEP_SUMMARY
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echo "- **Smoke Test**: ✅ Passed" >> $GITHUB_STEP_SUMMARY
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echo "" >> $GITHUB_STEP_SUMMARY
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echo "### Usage" >> $GITHUB_STEP_SUMMARY
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echo "\`\`\`bash" >> $GITHUB_STEP_SUMMARY
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echo "docker pull ghcr.io/${{ github.repository }}/demo:latest" >> $GITHUB_STEP_SUMMARY
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echo "docker run -p 8080:8080 ghcr.io/${{ github.repository }}/demo:latest" >> $GITHUB_STEP_SUMMARY
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echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
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# Alternative: .NET SDK Container Build (modern approach)
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dotnet-container-build:
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runs-on: ubuntu-latest

‎deployment/docker/Dockerfile‎

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@@ -11,9 +11,9 @@ ENV DOTNET_CLI_TELEMETRY_OPTOUT=true
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ENV NUGET_XMLDOC_MODE=skip
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# Configure .NET to handle SSL issues in Docker environment
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ENV DOTNET_SYSTEM_NET_HTTP_USESOCKETSHTTPHANDLER=0
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ENV SSL_CERT_FILE=/etc/ssl/certs/ca-certificates.crt
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ENV NUGET_CERT_REVOCATION_MODE=offline
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# Install ca-certificates and update certificate store
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# Update package lists and install certificates
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RUN apt-get update && \
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apt-get install -y ca-certificates && \
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update-ca-certificates && \
@@ -27,9 +27,10 @@ COPY ["src/NLWebNet/NLWebNet.csproj", "src/NLWebNet/"]
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COPY ["samples/Demo/NLWebNet.Demo.csproj", "samples/Demo/"]
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COPY ["tests/NLWebNet.Tests/NLWebNet.Tests.csproj", "tests/NLWebNet.Tests/"]
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# Restore dependencies with retry and improved networking
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# Restore dependencies with SSL workarounds
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RUN dotnet restore "samples/Demo/NLWebNet.Demo.csproj" \
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--verbosity normal \
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--disable-parallel \
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--verbosity minimal \
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--force
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# Copy source code

‎deployment/docker/README.md‎

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# Docker Build Guide for NLWebNet
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This document provides guidance for building Docker containers for the NLWebNet Demo application, including workarounds for common SSL issues in certain environments.
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## Quick Start
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### Standard Build (GitHub Actions / CI)
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For CI/CD environments with proper SSL configuration:
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```bash
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docker build -f deployment/docker/Dockerfile -t nlwebnet-demo:latest .
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```
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### Local Development Build
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For local development environments that may have SSL certificate issues:
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```bash
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# Use the automated build script that handles SSL issues
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./deployment/docker/build-docker.sh
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```
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## Build Approaches
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### 1. Standard Dockerfile (Recommended for CI/CD)
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**File**: `deployment/docker/Dockerfile`
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- Restores NuGet packages during Docker build
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- Optimized for CI/CD environments
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- Uses multi-stage build for minimal final image
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- Includes SSL certificate handling improvements
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### 2. Pre-built Approach (Fallback for SSL Issues)
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**File**: `deployment/docker/Dockerfile.pre-built`
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- Requires packages to be restored on host before build
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- Bypasses SSL issues by using `--no-restore`
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- Useful for environments with network restrictions
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## SSL Certificate Issues
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### Problem
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In some Docker environments, you may encounter SSL certificate validation errors:
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```
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error NU1301: Unable to load the service index for source https://api.nuget.org/v3/index.json
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The remote certificate is invalid because of errors in the certificate chain: UntrustedRoot
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```
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### Solutions
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1. **Use GitHub Actions** (Recommended)
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- CI/CD environments typically have proper SSL configuration
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- The workflow automatically builds and publishes to GHCR
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2. **Pre-restore packages locally**:
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```bash
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dotnet restore
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docker build -f deployment/docker/Dockerfile.pre-built -t nlwebnet-demo .
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```
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3. **Use the automated build script**:
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```bash
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./deployment/docker/build-docker.sh
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```
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## Testing the Container
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### Health Check
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The container includes a health check endpoint:
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```bash
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# Start the container
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docker run -p 8080:8080 nlwebnet-demo:latest
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# Test health endpoint
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curl http://localhost:8080/health
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```
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### Automated Smoke Test
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Use the provided smoke test script:
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```bash
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# Run smoke test on built image
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./deployment/docker/smoke-test.sh nlwebnet-demo:latest
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```
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## GitHub Container Registry (GHCR)
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The GitHub Actions workflow automatically publishes images to GHCR:
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```bash
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# Pull from GHCR
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docker pull ghcr.io/nlweb-ai/nlweb-net/demo:latest
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# Run the image
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docker run -p 8080:8080 ghcr.io/nlweb-ai/nlweb-net/demo:latest
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```
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## Environment Variables
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Key environment variables for the container:
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- `ASPNETCORE_ENVIRONMENT`: Set to `Production` by default
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- `ASPNETCORE_URLS`: Set to `http://+:8080`
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- `ASPNETCORE_HTTP_PORTS`: Set to `8080`
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## Security
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- Container runs as non-root user (`nlwebnet`)
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- Uses minimal ASP.NET Core runtime image
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- Includes security best practices
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## Troubleshooting
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### Build Issues
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1. **SSL Certificate Errors**: Use pre-built approach or build in CI
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2. **Package Restore Fails**: Ensure internet connectivity and DNS resolution
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3. **Permission Denied**: Check Docker daemon permissions
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### Runtime Issues
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1. **Container won't start**: Check logs with `docker logs <container-name>`
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2. **Health check fails**: Verify port 8080 is accessible
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3. **Application errors**: Check environment variables and configuration
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## Contributing
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When making changes to Docker configuration:
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1. Test both Dockerfile approaches
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2. Update this documentation
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3. Verify the smoke test passes
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4. Ensure GitHub Actions workflow succeeds

‎deployment/docker/build-docker.sh‎

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#!/bin/bash
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# Build script for Docker container in environments with SSL issues
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# This script prepares a build-ready environment and builds the Docker image
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set -e
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echo "🔧 Building NLWebNet Docker image with SSL workarounds..."
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# Check if we're in the right directory
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if [ ! -f "NLWebNet.sln" ]; then
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echo "❌ Error: Must be run from repository root directory"
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exit 1
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fi
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# Pre-restore packages locally to avoid SSL issues in Docker
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echo "📦 Pre-restoring packages locally..."
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dotnet restore
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# Build the Docker image with appropriate strategy based on environment
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echo "🐳 Building Docker image..."
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# Try the standard approach first
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if docker build -f deployment/docker/Dockerfile . -t nlwebnet-demo:latest; then
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echo "✅ Docker build successful with standard approach"
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elif [ -f "deployment/docker/Dockerfile.pre-built" ]; then
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echo "⚠️ Standard build failed, trying pre-built approach..."
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# Use the pre-built approach if available
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cp deployment/docker/.dockerignore-prebuilt .dockerignore.backup
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mv .dockerignore .dockerignore.original
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cp deployment/docker/.dockerignore-prebuilt .dockerignore
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if docker build -f deployment/docker/Dockerfile.pre-built . -t nlwebnet-demo:latest; then
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echo "✅ Docker build successful with pre-built approach"
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else
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echo "❌ Both build approaches failed"
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# Restore original .dockerignore
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mv .dockerignore.original .dockerignore
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rm -f .dockerignore.backup
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exit 1
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fi
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# Restore original .dockerignore
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mv .dockerignore.original .dockerignore
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rm -f .dockerignore.backup
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else
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echo "❌ Docker build failed and no fallback available"
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exit 1
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fi
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echo "🎉 Docker image build completed successfully!"
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echo "📝 To run the container: docker run -p 8080:8080 nlwebnet-demo:latest"
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echo "🔍 To test health endpoint: curl http://localhost:8080/health"

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