Docker contd

Story of dot-cloud

• This was a sanfransico based startup working on PaaS products
• For their internal use they have created a product which is called as docker (dock worker) and open sourced this
• This was first demo
• This was very well apprecieted and the companies name was changed to Docker Inc.
• Docker democratized containers.

How containers work internally

• Refer Here for internals
• Three important linux concepts make this happen
  • cgroups
  • capabilities
  • namespaces

Terms

• Stateful vs Stateless
• Containers work seamless for Stateless and for stateful to preserve data we need to do few extra steps.