Docker

Evolution

• Scenario: Running a simple web application

Solution-1: Physical Servers

• Procure 2 Physical Servers with decent configuration (higher than needed)
• Cons:
  • Cost
  • Under usage of Server Resources

Solution 2: Operating System Virtualization

• Install Hypervisors like VMWare on the physical servers and create virtual machines
• Better usage of Server Resources
• Cons:
  • Still OS overhead is involved

Solution 3: Container

• Install Container tech like docker/lxc/lxd and run the applications inside containers.
• Container is an isolated area, with all the necessary resources available to run the application
• With containers scaling and portability becomes extremely simple.