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International Space Station Data Engineering Live Streaming Project

This project aims to create a robust data engineering pipeline using technologies such as Apache Airflow, Apache Kafka, Apache Zookeeper, Apache Spark, Cassandra, Python, and Docker.

Overview

The project involves fetching real-time data from the ISS API, streaming it to Kafka, and then using Spark to insert this data into Cassandra. Additionally, a mechanism will be implemented to receive an email notification when the ISS is overhead at the current location during nighttime, allowing for the observation of the fastest-moving object in the sky.

Dashboard

A dashboard will be created to visualize the ISS's longitude and latitude on a world map, with the ability to filter by date.

Link to final dashboard

Architecture Flowchart

FLowchart

Docker Containers and Configuration

To set up the data pipeline, an environment hosting all the required services will be created. One approach is to create a Docker bridge network and run containers for all these services within this network.

Create Docker network:

docker network create --driver bridge ISS_proj

Airflow container

Link to Docker compose file

In this docker compose file there are total 3 containers required for the working of Apache Airflow

  1. Airflow Webserver- Provides user interface for Airflow. It allow users to interact with DAGs etc. DAGs(Direct Acyclic Graphs) is collection of tasks that you want to run on a schedule represented as a Python script where each task is an instance of an operator Dag location
  2. Scheduler- Crucial component responsible for scheduling the execution of DAGs
  3. PostgreSQL- Store the Metadata of Airflow

FYI: entrypoint.sh This file will run first when docker container is initiated for run note - if error comes and entrypoint.sh is not executable then use chmod +x entrypoint.sh

requirements.txt This file contains list of all packages which is required inside the container, if new package is required install using this

Additional configuration for sending mail

In python for sending mail via SMTP it required email and its password(or API key), I am passing the email and password through the environment variable

Add following in airflow webserver and scheduler docker-compose.yml file -

services:
  webserver:
    environment:
      - [email protected]
      - GMAIL_PASSWORD=your_password
docker compose -f "Airflow/docker-compose.yml" up -d
# go to http://192.168.1.111:8536/

Kafka container

Link to docker compose file

There are 4 containers inside this docker compose:

  1. Zookeeper: Manage and coordinate brokers in the kafka cluster
  2. Broker: are the kafka servers, they store and manage message logs
  3. Schema Registry: Optional component that is used when working with Avro serialization in Kafka, this ensures that producer and consumers can exchange messages with compatible schemas
  4. Control Center: it is a management and monitoring tool for Kafka cluster

Spark Cluster containers

Link to docker compose file

Spark cluster has Master and Worker architecture, note: For this project using 1 master and 1 worker node cluster

  1. Master Node: it coordinates the execution of spark applications and manages the cluster resources
  2. Worker Node: this perform the actual data processing tasks

Cassandra container

Link to docker compose file