Jenkins Docker Deploy Example

A Statping-like status monitoring app that demonstrates a Jenkins pipeline for Docker build, push, and deploy. The app performs HTTP/HTTPS and TCP checks, stores history in SQLite, and provides a dashboard with reports.

App Features

HTTP/HTTPS checks – Ping URLs, measure response time and status code (success = 2xx)
TCP checks – Verify connectivity to host:port
History storage – SQLite database persists check results
Reports – Uptime %, avg/min/max latency, recent check history

Repository Structure

.
├── Jenkinsfile          # Pipeline definition
├── Dockerfile           # Application image
├── docker-compose.yml   # Deployment compose (pulled by deploy host)
├── app.py               # Entry point
├── app/
│   ├── main.py          # Flask routes
│   ├── models.py        # SQLite schema
│   ├── checker.py       # HTTP/HTTPS and TCP check logic
│   └── scheduler.py     # APScheduler for periodic checks
├── templates/           # HTML templates
├── static/              # CSS
├── requirements.txt
└── README.md

Manual Test

# Build and run locally
docker build -t myapp:test .
docker run -p 8080:8080 -v $(pwd)/data:/app/data myapp:test
# Visit http://localhost:8080

Add services from the dashboard (e.g. https://example.com, google.com:443 for TCP) and view reports.

Jenkins Pipeline

The pipeline:

Builds a Docker image
Pushes the image to a container registry (Docker Hub, etc.)
SSHs to a deployment machine
Clones (or pulls) this repo to get docker-compose.yml
Deploys with docker compose up -d

Prerequisites

Jenkins

Docker installed and Jenkins user in docker group
Pipeline and SSH Agent plugins
Git for cloning

Jenkins Credentials

ID	Type	Purpose
`docker-registry-credentials`	Username/Password	Docker Hub or registry login
`deploy-ssh-key`	SSH Username with private key	SSH to deploy host

Deploy Host

Docker and Docker Compose installed
SSH access for the deploy user
If using a private registry: run docker login on the deploy host

Configuration

Edit the environment block in Jenkinsfile:

environment {
    DOCKER_REGISTRY = 'docker.io'
    DOCKER_IMAGE = 'myorg/myapp'
    DEPLOY_HOST = 'deploy-server.example.com'
    DEPLOY_USER = 'deploy'
    DEPLOY_PATH = '/opt/myapp'
    GIT_REPO_URL = 'https://github.com/myorg/jenkins-docker-deploy-example.git'
}

First-Time Deploy Host Setup

sudo mkdir -p /opt/myapp
sudo chown deploy:deploy /opt/myapp
sudo usermod -aG docker deploy

The docker-compose.yml mounts ./data:/app/data for SQLite persistence. Ensure the deploy directory is writable.

Branch Behavior

main → image tag latest
other branches → image tag {BUILD_NUMBER}-{GIT_SHA}

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