Docker in High-Level

Docker Images

A Docker image is an executable package that includes everything needed to run an application such as the code, a runtime, libraries, environment variables and configuration files. A container is a runtime instance of an image.

Layers of Docker Images

The Docker images are made up of layers make them to be extremely efficient and flexible. Note that the layers cannot be modified but we can build news images from existing images.

Dockerfile

The configuration file that builds that Docker image is called the Dockerfile, which is a text file that contains all the commands needed to build a docker image.

#docker #docker images #dockerfile