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Traditional Deployment #

Traditional deployment

Advantages of Docker #

Advantages of Docker

Running Docker Image #

Running Docker Image

Virtual Machine Architecture #

Virtual Machine Architecture

Container Architecture #

Container Architecture

Container Registry #

Container Architecture

Dockerfile #

Dockerfile

Why is Docker Popular

Docker Image Creation and Use #

sequenceDiagram
    participant Dev as Developer
    participant CLI as Docker CLI
    participant Daemon as Docker Daemon
    participant Hub as DockerHub

    %% Step 1: Docker Image Build
    Dev->>CLI: docker build -t my-app .
    CLI->>Daemon: Build image request
    Daemon->>Daemon: Build the image locally
    Daemon->>CLI: Build complete
    CLI->>Dev: Image created successfully

    %% Step 2: Push to DockerHub
    Dev->>CLI: docker push my-app
    CLI->>Daemon: Push image request
    Daemon->>Hub: Authenticate and push layers
    Hub-->>Daemon: Acknowledge image pushed
    Daemon->>CLI: Push complete
    CLI->>Dev: Image pushed successfully

    %% Step 3: Pull from DockerHub
    Dev->>CLI: docker pull my-app
    CLI->>Daemon: Pull image request
    Daemon->>Hub: Authenticate and request image
    Hub-->>Daemon: Send image layers
    Daemon->>CLI: Pull complete
    CLI->>Dev: Image pulled successfully

    %% Step 4: Run Docker Container
    Dev->>CLI: docker run my-app
    CLI->>Daemon: Run container request
    Daemon->>Daemon: Allocate resources and start container
    Daemon->>CLI: Container started
    CLI->>Dev: Container is running

Docker Networking #

Docker Bridge Network

Docker Host Network