What is Docker?

• World leading container software platform

Software runs on different platforms
Docker allows developers  to put all of the parts in a package->create a docker file and build an image.
Then Docker will "ship" this package to different platforms.

Other users can pull the image and create a container.

 

•  VM vs Container

Hypervisors vitual machine monior, Hypervisors have multiple Virtual machines on the same host, VMs decreased the waiting time for deploying code and bug fixing in a big manner, but the real game changer was Docker containers.
In my last testing job, we used vmware to test software in different OS.


Compared to VM, Containers platform is more light and efficiency.
Container: an image is a template, and a container is a copy of that template.