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# ORU Analyzer - Source-to-Image (S2I) Deployment
This document describes how to deploy ORU Analyzer using OpenShift Source-to-Image (S2I) as an alternative to container-based deployment.
## 🚀 S2I vs Container Build
### Container Build (Current)
- Uses Dockerfile + Quay.io + GitHub Actions
- Manual build and push process
- More control over build process
### Source-to-Image (S2I)
- Direct deployment from Git repository
- OpenShift manages build and deployment
- Simpler deployment process
- Automatic rebuilds on code changes
## 📋 Prerequisites
- OpenShift 4.x cluster
- OpenShift CLI (oc) installed and configured
- Access to the cluster with appropriate permissions
- Git repository access
## 🛠️ S2I Deployment Methods
### Method 1: Using S2I Template (Recommended)
```bash
# 1. Login to OpenShift
oc login <cluster-url>
# 2. Deploy using S2I template
./scripts/deploy-s2i.sh
```
### Method 2: Using oc new-app
```bash
# 1. Create namespace
oc new-project resource-governance
# 2. Deploy using oc new-app
oc new-app python:3.11~https://github.com/andersonid/openshift-resource-governance.git \
--name=oru-analyzer \
--env=PYTHON_VERSION=3.11 \
--env=HOST=0.0.0.0 \
--env=PORT=8080
# 3. Expose the application
oc expose service oru-analyzer
# 4. Get the route
oc get route oru-analyzer
```
### Method 3: Using Template File
```bash
# 1. Process and apply template
oc process -f openshift-s2i.yaml \
-p NAME=oru-analyzer \
-p NAMESPACE=resource-governance \
-p GIT_REPOSITORY=https://github.com/andersonid/openshift-resource-governance.git \
-p GIT_REF=main \
-p PYTHON_VERSION=3.11 \
| oc apply -f -
# 2. Wait for deployment
oc rollout status deploymentconfig/oru-analyzer
```
## 📁 S2I File Structure
```
├── .s2i/
│ ├── environment # S2I environment variables
│ └── bin/
│ ├── assemble # Build script
│ └── run # Runtime script
├── openshift-s2i.yaml # OpenShift S2I template
├── scripts/
│ └── deploy-s2i.sh # S2I deployment script
└── README-S2I.md # This file
```
## ⚙️ Configuration
### Environment Variables
The S2I configuration supports the following environment variables:
```bash
# Python Configuration
PYTHON_VERSION=3.11
PIP_INDEX_URL=https://pypi.org/simple
# Application Configuration
APP_NAME=oru-analyzer
HOST=0.0.0.0
PORT=8080
WORKERS=1
# Resource Configuration
CPU_REQUEST=100m
CPU_LIMIT=500m
MEMORY_REQUEST=256Mi
MEMORY_LIMIT=1Gi
# Health Check Configuration
HEALTH_CHECK_PATH=/health
HEALTH_CHECK_INTERVAL=30s
HEALTH_CHECK_TIMEOUT=10s
HEALTH_CHECK_RETRIES=3
```
### Template Parameters
The OpenShift template supports the following parameters:
- `NAME`: Application name (default: oru-analyzer)
- `NAMESPACE`: OpenShift namespace (default: resource-governance)
- `GIT_REPOSITORY`: Git repository URL
- `GIT_REF`: Git reference/branch (default: main)
- `PYTHON_VERSION`: Python version (default: 3.11)
- `CPU_REQUEST`: CPU request (default: 100m)
- `CPU_LIMIT`: CPU limit (default: 500m)
- `MEMORY_REQUEST`: Memory request (default: 256Mi)
- `MEMORY_LIMIT`: Memory limit (default: 1Gi)
- `REPLICAS`: Number of replicas (default: 1)
- `ROUTE_HOSTNAME`: Custom route hostname (optional)
## 🔧 S2I Build Process
### 1. Assemble Phase
- Installs Python dependencies from `requirements.txt`
- Creates application directory structure
- Copies application files
- Sets proper permissions
- Creates startup script
### 2. Run Phase
- Sets environment variables
- Changes to application directory
- Starts the FastAPI application
## 📊 Monitoring and Debugging
### Check Build Status
```bash
# List builds
oc get builds -n resource-governance
# View build logs
oc logs build/<build-name> -n resource-governance
# Watch build progress
oc logs -f buildconfig/oru-analyzer -n resource-governance
```
### Check Application Status
```bash
# Check pods
oc get pods -n resource-governance
# Check deployment
oc get deploymentconfig -n resource-governance
# View application logs
oc logs -f deploymentconfig/oru-analyzer -n resource-governance
```
### Check Routes
```bash
# List routes
oc get route -n resource-governance
# Get route URL
oc get route oru-analyzer -o jsonpath='{.spec.host}'
```
## 🔄 Automatic Rebuilds
S2I supports automatic rebuilds when:
1. **Code Changes**: Push to the Git repository
2. **Config Changes**: Update ConfigMap or environment variables
3. **Image Changes**: Update base Python image
### Trigger Rebuild
```bash
# Manual rebuild
oc start-build oru-analyzer
# Rebuild from specific Git reference
oc start-build oru-analyzer --from-repo=https://github.com/andersonid/openshift-resource-governance.git --from-commit=main
```
## 🆚 S2I vs Container Build Comparison
| Feature | S2I | Container Build |
|---------|-----|-----------------|
| **Deployment Speed** | ⚡ Fast | 🐌 Slower |
| **Build Control** | 🔒 Limited | 🎛️ Full Control |
| **Git Integration** | ✅ Native | ❌ Manual |
| **Auto Rebuilds** | ✅ Automatic | ❌ Manual |
| **Registry Dependency** | ❌ None | ✅ Required |
| **CI/CD Complexity** | 🟢 Simple | 🟡 Complex |
| **Debugging** | 🟡 Limited | 🟢 Full Access |
| **Custom Builds** | ❌ Limited | ✅ Full Support |
## 🚀 Quick Start
```bash
# 1. Clone repository
git clone https://github.com/andersonid/openshift-resource-governance.git
cd openshift-resource-governance
# 2. Login to OpenShift
oc login <cluster-url>
# 3. Deploy using S2I
./scripts/deploy-s2i.sh
# 4. Access application
# Get URL from output or run:
oc get route oru-analyzer -o jsonpath='{.spec.host}'
```
## 🐛 Troubleshooting
### Common Issues
1. **Build Fails**
```bash
# Check build logs
oc logs build/<build-name>
# Check build configuration
oc describe buildconfig oru-analyzer
```
2. **Application Won't Start**
```bash
# Check pod logs
oc logs deploymentconfig/oru-analyzer
# Check pod status
oc describe pod <pod-name>
```
3. **Route Not Accessible**
```bash
# Check route configuration
oc describe route oru-analyzer
# Check service
oc get svc oru-analyzer
```
### Debug Commands
```bash
# Get all resources
oc get all -n resource-governance
# Check events
oc get events -n resource-governance
# Check build configuration
oc describe buildconfig oru-analyzer
# Check deployment configuration
oc describe deploymentconfig oru-analyzer
```
## 📚 Additional Resources
- [OpenShift Source-to-Image Documentation](https://docs.openshift.com/container-platform/4.15/builds/build-strategies.html#builds-strategy-s2i_build-strategies)
- [Python S2I Builder](https://github.com/sclorg/s2i-python-container)
- [OpenShift Templates](https://docs.openshift.com/container-platform/4.15/openshift_images/using-templates.html)
## 🤝 Contributing
To contribute to the S2I configuration:
1. Modify `.s2i/environment` for environment variables
2. Update `.s2i/bin/assemble` for build process
3. Update `.s2i/bin/run` for runtime behavior
4. Modify `openshift-s2i.yaml` for OpenShift resources
5. Test with `./scripts/deploy-s2i.sh`
---
**Note**: S2I deployment is an alternative to the standard container build process. Both methods are supported and can be used interchangeably based on your requirements.

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--name=oru-analyzer --env=PYTHON_VERSION=3.11
```
For detailed S2I documentation, see [README-S2I.md](README-S2I.md).
For detailed S2I deployment information, see the S2I section above.
### Tests
```bash