Docker
Docker is an open-source platform that enables developers to automate the deployment and management of applications inside lightweight, portable containers. A Docker container packages an application with all its dependencies, libraries, and configuration files, ensuring it runs consistently across different environments—from development to production. Docker uses a client-server architecture, where the Docker Engine builds and runs containers using instructions defined in Dockerfiles. It simplifies software delivery, accelerates development workflows, and supports microservices architecture. Widely adopted in DevOps, Docker helps teams improve scalability, portability, and resource efficiency across various platforms and cloud environments.
Docker is an open-source platform that enables developers to automate the deployment and management of applications inside lightweight, portable containers. A Docker container packages an application with all its dependencies, libraries, and configuration files, ensuring it runs consistently across different environments—from development to production. Docker uses a client-server architecture, where the Docker Engine builds and runs containers using instructions defined in Dockerfiles. It simplifies software delivery, accelerates development workflows, and supports microservices architecture. Widely adopted in DevOps, Docker helps teams improve scalability, portability, and resource efficiency across various platforms and cloud environments.
- Containers
- Lightweight, portable units that package an application and its dependencies.
- Isolated from the host system but share the OS kernel.
- Docker Images
- Read-only templates used to create containers.
- Built from Dockerfiles.
- Can be stored and shared via Docker Hub or private registries.
- Docker Engine
- The core runtime that builds, runs, and manages containers.
- Consists of the Docker daemon and CLI client.
- Dockerfile
- A script containing instructions to build Docker images.
- Defines the base image, dependencies, environment variables, commands, and more.
- Docker Compose
- A tool for defining and running multi-container Docker applications using YAML files.
- Simplifies orchestration of services with one command.
- Docker Hub & Registries
- Docker Hub: Public repository for sharing images.
- Private registries: Host custom images securely.
- Networking
- Docker provides networking drivers: bridge, host, overlay, and macvlan.
- Allows containers to communicate with each other and external networks.
- Volumes and Storage
- Persistent storage solutions for containers.
- Volumes store data independently from container lifecycle.
- Docker Swarm
- Native Docker orchestration tool for managing clusters of Docker engines.
- Provides service discovery, load balancing, and scaling.
- Security
- Isolation through namespaces and control groups (cgroups).
- Image signing, secrets management, and vulnerability scanning.
What is a Docker image?
A Docker image is a read-only template used to create Docker containers, containing the application code, runtime, libraries, and dependencies.
What is a Dockerfile?
A Dockerfile is a text file with instructions for building a Docker image, specifying base images, commands, environment variables, and more.
What is Docker Compose?
Docker Compose is a tool for defining and running multi-container Docker applications using a YAML file to configure services.
Kerala
Thiruvalla, Pandalam, Adoor, Pathanamthitta, Kayamkulam, Kottayam, Marthandam, Neyyattinkkara, Nedumangad, Thiruvananthapuram City, Kilimanoor, Karikode, Kollam City, Karunagapally, Punalur, Anchal, Kuttikkanam, Elappara, Kalamassery, Kaloor, Angamali, Thrissur, Palakkad, Manjeri, Valanchery, Perinthalmanna, Calicut (Kozhikode), Perumbavoor, Vyttilla, Alappuzha, Harippad.
Tamil Nadu
Velachery, Anna Nagar, Thiruvattiyoor, Neyveli, Aranthangi, Pudukottai, Nagapattinam, Karaikal, Ariyalur, Mulumichampatti, Saravanampatti, Gandhipuram, Kumbakonam, Mayiladuthurai, Vaniyambadi, Vellore, Tirupattur (Vellore), Kancheepuram, Thiruvannamalai, Hosur, Hosur East.
Karnataka
Bangalore Electronic City, Mysore Kuvempunagar, Mysore City.
Andhra Pradesh
Panruti, Dilsukhnagar, Chittoor, West Godavari.
Maharashtra
Panvel, Dombivli, Dombivli East, Thane, Kalyan, Akurdi, Chinchwad, Nigdi, Karvenagar, Revet, Kothrud.
West Bengal
Kolkata, Durgapur.
Rajasthan
Sikar, Kota, Jhalawar.
Jharkhand
Ranchi.
Uttar Pradesh
Allahabad, Lucknow, Rambagh.