Docker

What is Docker? The spark for the container revolution

Docker is a container platform that lets you create and run applications in a controlled environment in a single-node setup. Designed to run anytime, anywhere JavaScript is available, Docker can enforce security policies via an embeddable scripting engine, provide runtime type safety for native data structures and methods, and provide a host of other features to help developers build single-page applications with ease. Click Here to Download.

Brief History of Docker 

Docker is an open-source, distributed system that enables developers to build distributed applications with simplicity and speed. Built on Apache Mesos, a lightweight platform for running high-performance clusters on powerful hardware, Docker allows developers to package and deploy applications directly to these clusters without having to worry about coordination or host setup complications. The revolutionary new capability of Docker is that it enables developers to easily package and deploy applications across a cluster without going through a difficult API/layer on top of a traditional relational database such as MySQL or Postgres.

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What are Containers? 

Containers (also known as Dockers) are commonly used in the supply chain. They are used to store and ship goods from the source to your final destination. Each container has its own set of rules and regulations, which are different from one another. In addition, there are environmental factors you should consider when selecting a suitable container. These factors include product safety levels, shipping restrictions, land or low-lying areas that have a high potential for flooding, health concerns, personal security concerns, and more.

Parts of Docker 

The containers can run almost anywhere – your laptop, a data center, public clouds, or even multiple cloud providers simultaneously. Following are the essential components of docker:

Dockerfile:

This is the process of packing your files and dependencies into a neat and tightly packed package. These instructions can be saved in a text file and shared with others.

Docker Image:

A Docker image is an executable package with everything you need to run a piece of software. This includes everything from the code and runtime, to environment variables, file system entries, settings, dependencies, and other parameters.

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Docker Run Utility:

Docker is an awesome little utility that helps you automate a lot of your processes when developing for the web. It has a lot of great features built-in such as setting up a local development disk, running unit tests, and creating a full-stack image for your app. The best part about it is that you don’t need to worry about dealing with anything more complex than installing required software packages or downloading non-functional code snippets from the internet. And the best part is that once you learn how to use it you won’t want to go back to using your current build system.

Docker Hub:

Docker Hub is an easy way to gather and manage your favorite applications, images, and files in a central location. It provides an ideal solution for shared filenames and presents a streamlined experience when navigating through files. If you use a lot of cloud storage services, such as Google Drive or Dropbox, then Docker Hub makes managing large files easy and convenient.

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Docker Engine:

Docker Engine is the component that contains all of the Docker logic, using containers to package up application code into self-sufficient units that can quickly be deployed to servers. It gives software developers the freedom to write executable distributed code that can be run on any Linux machine (with or without Docker engine).

Docker Compose:

Docker Compose is a great tool that allows you to easily spin up multiple-container applications using docker. It allows you to create services, set ports for individual containers, and link together containers that should interact with each other. You can then use docker-compose up to spin the whole stack up at once.

Docker Desktop:

Docker Desktop is a new version of Docker that focuses on ease of use and the best experience for end-users. It combines everything you love about Docker into a polished application that runs on your Mac or Windows machine. The Docker Desktop is based on Moby, which is a lightweight Linux-based container runtime.

Docker Advantages 

The key advantages of Docker for new and existing cloud infrastructure users are the same as for any other cloud computing user: cost savings, simplification of IT processes, and security support. In addition, Docker enables developers to package and publish applications faster than with any other current or previous virtualization solution, increasing the adoption of cloud computing among large companies with tight budgets. For these reasons and others, we anticipate that the global cloud infrastructure will continue to be a competitive environment for developers and businesses of all sizes.

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Docker Drawbacks 

There are a few drawbacks to using a Docker computer. Firstly, there is no built-in firewall. You could be vulnerable to a variety of attacks both from the internet and similar hardware attacks. Secondly, the ability to launch external applications from within the container is dependent on the Docker engine package itself, which changes frequently and may not support older software versions. Lastly, you can’t simply uninstall applications when they become problematic.

What is Docker Today? 

Docker is one of the most popular DevOps tools to deploy applications in top cloud providers, it enables the developer to deploy code quickly, with a focus on code rather than into configuration, allowing developers more time to build their Application.

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