Sunday, November 20, 2016

What is Docker?

Build, ship and run any app, anywhere
dockerlogoDocker containers wrap a piece of software in a complete file system that contains everything needed to run: code, runtime, system tools, system libraries – anything that can be installed on a server. This guarantees that the software will always run the same, regardless of its environment.
Docker uses a client/server model. The server or daemon actually does all the building and running of docker container. Docker containers only run as long as they are needed.
  • Managing application dependencies is definitely easier with Bundler/NPM/Composer
  • Services that app depends on and running properly - Infrastructure Automation Software like Chef/Puppet made this easier
  • Virtualization - Vagrant has been amazing in developing the automation code.
Docker is a mashup of the above concepts. Visual Studio Tools for Docker
  • Docker containers are just binary files that you download and run. These contain the application and dependencies needed to run the application
  • The containers use the docker engine that provides the thin layer over the top of host OS vs a traditional VM
  • Uses host to run processes, these processes are sandboxed like iOS
  • No conflicts between containers
  • Can run on top of VM and make deployment easy

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