Docker (Dk)
Overview of the Tool
Docker is a containerization platform that allows developers to package applications and their dependencies into lightweight, portable containers. These containers ensure consistency across development, testing, and production environments, making application delivery faster and more reliable.
Key Features
- Containerization: Packages apps with all dependencies into isolated containers
- Portability: Runs consistently across laptops, servers, and cloud platforms
- Docker Images & Containers: Versioned, reusable application artifacts
- Docker Hub: Public and private image registry
- Fast Deployment: Lightweight compared to virtual machines
- Integration Friendly: Works seamlessly with CI/CD pipelines and orchestration tools like Kubernetes
How It Fits into DevOps / DevSecOps
DevOps:
- Enables consistent environments across dev, test, and prod
- Accelerates CI/CD pipelines by standardizing deployments
- Simplifies collaboration between development and operations teams
DevSecOps:
- Supports container image scanning for vulnerabilities
- Enables immutable infrastructure practices
- Works with security tools for policy enforcement, secrets management, and runtime security
Programming Language
Docker is primarily written in Go (Golang).
Dockerfiles are written using a domain-specific language (DSL).
Parent Company
Docker, Inc.
Open Source or Paid?
- Open Source: Docker Engine (core container runtime)
- Paid: Docker Desktop offers paid plans for enterprises and larger teams, with additional features and support
Conclusion
Docker is a core DevSecOps tool that simplifies application packaging, deployment, and scaling through containerization. It improves consistency, speeds up delivery, and integrates well with CI/CD and security practices, making it essential for modern DevOps and DevSecOps workflows.
Thank you @santhoshnc sir!!
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