IT-GP — Infrastructure & CI/CD Pipeline

This repository contains the complete infrastructure-as-code and CI/CD configuration for deploying and managing an SDN-based Data Center Network on AWS.

Architecture Overview

┌─────────────────────────────────────────────────────┐
│                      AWS Cloud                      │
│                                                     │
│  ┌──────────────┐        ┌───────────────────────┐  │
│  │   Terraform  │───────▶│  EC2 (t3.medium)      │  │
│  │  Provisions  │        │  ├── Jenkins (8080)   │  │
│  └──────────────┘        │  ├── Prometheus (9090)│  │
│                          │  ├── Grafana (3000)   │  │
│  ┌──────────────┐        │  ├── Alertmanager     │  │
│  │    Ansible   │───────▶│  ├── OVS Switches     │  │
│  │  Configures  │        │  └── ContainerLab     │  │
│  └──────────────┘        └───────────────────────┘  │
│                                                     │
│  ┌──────────────┐                                   │
│  │   Jenkins    │──── GitHub Webhook ──▶ sdn repo   │
│  │  Automates   │                                   │
│  └──────────────┘                                   │
└─────────────────────────────────────────────────────┘

Repository Structure

IT-GP/
├── Terraform/               # AWS infrastructure provisioning
│   ├── vpc.tf               # VPC, subnets, internet gateway
│   ├── compute.tf           # EC2, ASG, launch template (Spot instances)
│   ├── security_groups.tf   # Inbound/outbound rules
│   ├── networking.tf        # Route tables, associations
│   ├── efs.tf               # Elastic File System (shared storage)
│   ├── route53.tf           # ALB, target groups, internal DNS
│   ├── backend.tf           # S3 remote state
│   ├── variables.tf
│   └── outputs.tf
│
├── Ansible/                 # Configuration management
│   ├── site.yml             # Master playbook
│   ├── hosts.ini            # Inventory
│   ├── jenkins_master.yml   # Jenkins installation & setup
│   ├── sdn_node.yml         # OVS + ContainerLab installation
│   ├── node-exporter.yml    # Prometheus Node Exporter
│   └── apply_monitoring.yml # Prometheus + Grafana + Alertmanager
│
├── Jenkins/                 # CI/CD pipeline definitions
│   ├── Jenkinsfile          # Main pipeline
│   └── stages/
│       ├── validate_parameters.groovy
│       ├── clone_repo.groovy
│       ├── reset_deployment.groovy
│       ├── deploy_topology.groovy
│       ├── configure_switches.groovy
│       └── verify_deployment.groovy
│
└── monitoring/              # Observability stack
    ├── docker-compose.yml   # Prometheus + Grafana + Alertmanager
    ├── config/
    │   ├── prometheus.yml   # Scrape configs (Jenkins, Node Exporter)
    │   ├── alert.rules.yml  # CPU, memory, disk, container alerts
    │   └── alertmanager.yml # Slack webhook notification routing
    └── grafana/
        └── provisioning/    # Auto-provisioned dashboards & datasources

Tech Stack

Layer	Technology
Cloud Provider	AWS (eu-central-1)
Infrastructure	Terraform, S3 remote state
Compute	EC2 t3.medium, Spot Instances, Auto Scaling Group
Configuration Management	Ansible
CI/CD	Jenkins (GitHub webhook-triggered)
Monitoring	Prometheus + Grafana + Alertmanager
Alerting	Slack
SDN	Open vSwitch, ContainerLab, Ryu

Prerequisites

AWS CLI configured with appropriate permissions
Terraform >= 1.0
Ansible >= 2.12
SSH key pair

Deployment

1. Provision Infrastructure

cd Terraform/
terraform init
terraform plan
terraform apply

2. Configure the Server

cd Ansible/
ansible-playbook -i hosts.ini site.yml

Installs and configures:

Jenkins with required plugins
Open vSwitch
ContainerLab
Prometheus, Grafana, Alertmanager via Docker Compose
Prometheus Node Exporter

3. Jenkins Pipeline Setup

Create a Pipeline job in Jenkins
Set SCM to: https://github.com/abeerseada/sdn
Script Path: Jenkinsfile
Add GitHub webhook: http://<EC2_IP>:8080/github-webhook/

GitHub Webhook Configuration:

Jenkins Pipeline (deploy-sdn):

Jenkins Pipeline — Successful SDN Deployment (all stages green):

Services & Access

Service	URL	Description
Jenkins	`http://<EC2_IP>:8080`	CI/CD pipeline
Prometheus	`http://<EC2_IP>:9090`	Metrics collection
Grafana	`http://<EC2_IP>:3000`	Dashboards
Alertmanager	`http://<EC2_IP>:9093`	Alert routing
Ryu FlowManager	`http://<EC2_IP>:8081/home/index.html`	SDN controller UI