• What's the topic?
  • Docker
  • Why Docker?
    • Because from data to dev to ops everyone is using it

    • Category	Technologies
      Backend	Rails FastAPI NestJS Express Spring
      Frontend Frameworks	React Vue Svelte
      Databases	PostgreSQL MongoDB
      Mobile Frameworks	React Native Flutter
      Desktop	Qt

• Let's get Started
  • How do we start Docker
    • Install it first
    • Write a docker file

      • FROM node:24.13.0
        WORKDIR /app
        COPY ./src ./src
        EXPOSE 3000
        CMD ["node", "test.js"]
        

      • What is the image node:24.13.0
        • What's inside of it
      • What the WORKDIR and COPY means
        • copy the files
      • We can hold the EXPOSE 3000
      • To run the app we do node test.js
    • We can run this even in our machine without docker right that means what's the need for Docker?
      • Noisy Neighbour Problem
        • 
      • Why not Virtual Machines
        • What's the diff
        • No Hypervisor overhead everything's shared in the host kernel
          • 
      • Resource Allocation separately for separate services
        • How it achieves that using cgroups and namespaces
        • 
          • What's a Cgroup and Namespace
            • CGroup
              • {:height 421, :width 594}
            • NameSpaces
              • Isolate the network
              • 
        • We can run it in ec2 machines and add load balancing and scale incrementally why not that?
          • It also solves works on my machine , It works everywhere
          • What to do when need for scaling 1000's of machines in netflix ,google
            • That's where Kubernetes comes into play