Docker is an open platform for developing, shipping & running applications by using containers. Containers allow packaging up an application with all of the parts it needs, such as libraries & other dependencies and deploy it as one package. By taking advantage of Dockers’s methodologies for shipping, testing and deploying code quickly, you can significantly reduce the delay between writing code and running it in production.
Easy and Faster Configuration: This is a key feature of docker that helps us to configure the system easily and faster.
Increase productivity: By easing technical configuration and rapid deployment of application. No doubt it has increase productivity. Docker not only helps to execute the application in isolated environment but also it has reduced the resources.
Application Isolation: It provides containers that are used to run applications in isolation environment. Each container is independent to another and allows us to execute any kind of application.
Services: Services is a list of tasks that lets us specify the state of the container inside a cluster. Each task represents one instance of a container that should be running and Swarm schedules them across nodes.
Why It’s Good for learning Docker
1.Dockerized apps don’t require their own operating system: So maintaining apps doesn’t also mean maintaining the system on which they run. Only your host system’s OS needs to be updated and secured, leaving you time to do the thousand other things SysAdmins need to do!.
2.Each Dockerized app gets its own set of dependencies: There’s no longer any need to worry about conflicting versions of libraries. If one app needs PHP version 5.2 and another needs 5.4, with Docker that’s no problem!.
3.Most of the heavy lifting is already done: The Docker community maintains the images at Docker Hub, which means setting up complete application environments is a simple one-line command. Rather than taking the time to set up the system your app requires, you can devote your time to developing your application.
4.Controlling Docker containers can be fully automated: Remember that single-line command for setting up an environment? It can be scripted or automated like any other command line tool. That means you can programmatically scale and deploy applications without wasting valuable hands-on time.
5.It’s easy!: Truly, Docker is a time saving tool that is easy to learn and integrate into your environment. There’s no reason to avoid learning Docker, as it will benefit almost every server room to some degree. Its Open Source nature also means those benefits can be realized without a large investment.