3-9_Docker_Introduction docker run .pptx

3-9_Docker_Introduction docker run .pptx

• 1.
  Docker Introduction
• 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