Docker Introduction
What is Docker?
• Open-source platform for containerization
• Packages applications with dependencies
• Ensures consistency across environments
• Lightweight and portable
Why Docker?
• Faster application deployment
• Reduces infrastructure costs
• Eliminates 'works on my machine' issue
• Scalability and flexibility
Docker Architecture
• Docker Client – CLI or API
• Docker Daemon – Manages
containers/images
• Docker Images – Templates for containers
• Docker Containers – Running instances
• Docker Registry – Stores images (Docker Hub)
Docker Workflow
• 1. Build – Create an image from Dockerfile
• 2. Ship – Push image to registry (e.g., Docker
Hub)
• 3. Run – Deploy container from image
Key Concepts
• Images – Blueprints for containers
• Containers – Lightweight, isolated
environments
• Volumes – Persistent data storage
• Networks – Container communication
Docker vs Virtual Machines
• Docker: Uses host OS kernel, lightweight
• VM: Requires full OS per VM, heavy
• Docker starts in seconds vs VM in minutes
• Docker consumes fewer resources
Use Cases of Docker
• Microservices architecture
• Continuous Integration/Continuous Delivery
(CI/CD)
• Application portability
• Testing and development environments
• Cloud-native deployments
Summary
• Docker provides containerization for apps
• Ensures consistency, portability, and
scalability
• Key components: Client, Daemon, Images,
Containers
• Faster and lighter than Virtual Machines
• Widely used in DevOps and Cloud

3-9_Docker_Introduction docker run .pptx

  • 1.
  • 2.
    What is Docker? •Open-source platform for containerization • Packages applications with dependencies • Ensures consistency across environments • Lightweight and portable
  • 3.
    Why Docker? • Fasterapplication deployment • Reduces infrastructure costs • Eliminates 'works on my machine' issue • Scalability and flexibility
  • 4.
    Docker Architecture • DockerClient – CLI or API • Docker Daemon – Manages containers/images • Docker Images – Templates for containers • Docker Containers – Running instances • Docker Registry – Stores images (Docker Hub)
  • 5.
    Docker Workflow • 1.Build – Create an image from Dockerfile • 2. Ship – Push image to registry (e.g., Docker Hub) • 3. Run – Deploy container from image
  • 6.
    Key Concepts • Images– Blueprints for containers • Containers – Lightweight, isolated environments • Volumes – Persistent data storage • Networks – Container communication
  • 7.
    Docker vs VirtualMachines • Docker: Uses host OS kernel, lightweight • VM: Requires full OS per VM, heavy • Docker starts in seconds vs VM in minutes • Docker consumes fewer resources
  • 8.
    Use Cases ofDocker • Microservices architecture • Continuous Integration/Continuous Delivery (CI/CD) • Application portability • Testing and development environments • Cloud-native deployments
  • 9.
    Summary • Docker providescontainerization for apps • Ensures consistency, portability, and scalability • Key components: Client, Daemon, Images, Containers • Faster and lighter than Virtual Machines • Widely used in DevOps and Cloud