Wednesday, October 3, 2018

Docker - An Introduction to the Application Deployment Tool











It is an application development platform that wraps a piece of software in a complete file system. It packs an application into a deployable unit with all its dependencies. It contains everything that an application requires to run including runtime environment, system tools, and libraries. With all the required components, the application guarantees the same behavior regardless of the environment where it is running.

It lets you quickly assemble applications from its components and eliminates the rasping while shipping and deploying code. With Docker, you can test and deploy your application into production in the fastest possible way. The core features are described below.

  • It allows deploy and scale software applications more easily.
  • It has containers that run on almost each platform. Docker containers can be deployed on desks, physical servers, virtual machines, data centers, and clouds as well.
  • It allows you to move your application from a testing environment into the cloud or production and whenever you require.
  • It is light weight; therefore, scaling up and down is fast and easy.
  • It allows you to quickly launch more containers when needed and then shut them down easily when they're no longer needed.
  • It does not need hyper-visor and allows you to run more workloads on hosts.
  • It allows you to easily make lots of small changes instead of huge, big bang updates. Therefore, smaller changes mean reduced risk and more uptime.
  • It runs containers in isolation from each other. Therefore, one application can not disturb another application.

The Docker engine is responsible for creating and running Docker containers. It is a lightweight and powerful open source container that enables virtualization for building and shipping software applications. Containers have similar resource isolation and allocation benefits as virtual machines. However, containers use different architectural approach for enabling resource isolation and allocation that offer more efficient use of resources in comparison to virtual machines.

Docker Hub is the cloud-based repository. It enables building and shipping service containers or applications. Using Docker Hub, programmers can host and manage Docker images. In addition, it offers a centralized resource for managing container images, distribution and change management, workflow automation, and team collaboration.

Core features and functions of the hub repository are described as follows.

  • Image Repositories : Allow you to manage, find, push and pull images from community, official, and private image libraries.
  • Automated Builds : Accommodate changes automatically and creates new images whenever you make changes to a source GitHub or Bit bucket repository.
  • Web hooks : Allow programmers to trigger actions after a successful push to a repository.
  • Organizations : Allow to manage access of image repositories by creating groups.
  • GitHub and Bit bucket Integration : Allow programmers to add the GitHub and Docker images to the current workflows.












  • How to Design Upholstery and Car Interiors Many of us car drivers use our cars regularly to transport us, whether it's to work, shopping or anywhere else. What comes with using a car is wear and tear, on the exterior of the car and inside it too. When I used to sit inside my car, I…
  • Financial Advice For a 401k LoanIf you are in the situation whereby you are in need of money fast, your 401K may be looking pretty good right about now. After all, it is possible to take out a loan against your 401K. There are some rules and tips you need to remember, however.…
  • Invisible Computer Monitoring - Is it Truly Invisible?Invisible computer monitoring should be just that - invisible. So then, why are so many computer spy software programs that are out there have these obvious telltale signs that such software is on my computer watching everyone? How smart is it to…
  • Online Transfer - Best Way to Send Money to Family in India More players are entering the non-resident Indian (NRI) segment with better exchange rates and facilities to offer. So it is very important to explore all options before choosing a provider when sending money to India. If you are looking for…
  • 4 Things to Look for in a Gift Delivery Service for the Philippines Sending gifts to the Philippines is one of the ways Filipinos abroad can show their family and friends in the Philippines that they think of them. Shopping online to send gifts to the Philippines has become an ever more popular option as…