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Why use Docker?

 This week on my CS Journey, I want to talk about Docker. I know we went over several different activities in class; however, I was still a little confused, so I decided to look more into detail from outside sources to understand the concept and terms well. Docker is a tool designed to make it easier to create, deploy, and run applications by using containers. A container is not so much different than a Virtual Machine But, instead of creating a full operating system, a Docker Container has just the minimum set of operating system software needed for the application to run and rely on the host Linux Kernel itself.

The first blog talked about the importance of docker and how to step a docker file in the root directory. There was a 12-minute video from YouTube that explained the concept very well. I learned a lot from that YouTube video. The blog also talked about creating a docker-compose file which is a tool that allows you to deploy and manage multiple containers at the same time. I learned the concepts that go inside a file including, From where to take a Docker file to build a particular image, Which ports you want to expose, How to link containers, Which ports you want to bind to the host machine, and other key commands. This blog was very helpful to do assignment 4 building the Nginx and the MongoDB servers.  

The next blog talked about the benefit of docker, one of the major benefits of containers is portability. Containers can run on top of virtual machines, or in the cloud. This has made it easier to use cases of containers to be around software development. People now can write applications, place it in a container, and then the application can be moved across various environments, as it is encapsulated inside the container which I think is helpful in the environment. It was quite interesting to learn that Docker offers privately hosted repositories of containers, which are about $1 per container. Many tech companies are looking to get into the action of using docker at their place especially the cloud hosting companies.

It was interesting to learn about the concepts of Docker, how to use the commands properly and how major companies are using docker at their workplace, Overall, the blogs and the video helped me to understand the tools behind docker especially running your image from localhost to port and other interesting concepts. I highly recommend everyone check out the video it is well explained.

Source1: https://medium.com/@reyhanhamidi/why-bother-use-docker-61eadf968d87 

Source2: https://www.networkworld.com/article/2361465/docker-101-what-it-is-and-why-it-s-important.html

Video: https://www.youtube.com/watch?v=YFl2mCHdv24

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