Quick Guide - Docker/Container/Container Images/Registry
In this post we will be listing and exploring the commands and basic approach to get started build container images with Docker. I am using Google Cloud Shell for this blog but you just installed Docker on your local machine. Lets go through each keyword in brief: Container Images: Container image is the package of the actual code and all its dependencies. This makes it easy to be executed on any environments/OS etc. Example, if you have a nodeJs file say app.js. In order to run the app.js, you will need node version to be installed on the machine. Similarly, in case of a container Image, it will first have a node installation -> your code i.e. app.js in a single package. Container: Container Images become container when they are running on the platform example, Docker/Kubernetes etc. Registry: Once you build the image on the local machine, you can check in the image in to Container Registry. This allow it to be pulled from multiple platforms and make it sharable. Ref in case