What makes Dockers technology unique

What does Docker

docker is cutting edge because it allows many more applications to run on the same old servers, and it also makes it very easy to package and ship programs.

Docker containers that run on Docker (more info Docker training courses) Engine:
  • default: Docker created the industry standard for containers so they can be taken anywhere
  • lightweight: Containers share the operating system kernel of the computer and therefore do not require an operating system (more on operating system seminars) per application, which leads to higher server efficiency and lower server and license costs.
  • For sure: Applications are safer in containers, and Docker offers the strongest standard insulation in the industry
Several Docker training courses deal with the individual functionalities in detail.
history
The introduction of Docker in 2013 ushered in a revolution in application development - by democratizing software containers. Docker developed a Linux container technology - a technology that is portable, flexible and easy to implement. Docker opened libcontainer and partnered with a global community of contributors to help drive development. In June 2015, Docker donated the container image specification and runtime code, now known as runc, to the Open Container Initiative (OCI) to help standardize as the container ecosystem grows and matures.

Following this development, Docker continues to give something back with the containerd project, which Docker donated to the cloud (see cloud training courses) in 2017 to the Native Computing Foundation (CNCF). containerd is an industry standard container runtime environment that uses runc and was developed with an emphasis on simplicity, robustness and portability. containerd is the core container runtime environment of the Docker Engine.
 
Container standardization

Docker brings some new things to the table that the earlier technologies didn't bring. The first is that it makes containers easier and safer to deploy and use than previous approaches. In addition, by working with other container providers, including Canonical, Google (more information on Google Training), Red Hat (more on Red Hat Training) and Parallels, Docker has the much-needed standardization of its most important open source component libcontainer reached by containers.

Since then, Docker has donated "its software container format and its runtime as well as the associated specifications" to the Open Container Project of the Linux (see also Linux Training) Foundation. Specifically, it says: "Docker has taken over and donated the entire contents of the libcontainer project, including nsinit, and any changes that are necessary to make it run independently of Docker".

Docker has continued work on other container standardization efforts. For example, Dockers containerd, the open source container runtime environment, is now hosted by the Cloud Native Computing Foundation (CNCF).

Today, Docker per se no longer has any competitors. There are other LXC-based container implementations like CoreOS, now LXD from Red Hat, Rkt or Canonical, but they are not so much competitors as LXC refinements. However, you can run Docker containers on virtually any operating system or cloud. That gives her an advantage over the other.

At the level above the container, container orchestration, Docker has a serious competitor: Kubernetes.

Container orchestration

Like every other element of your IT infrastructure, containers need to be monitored and controlled. Otherwise, you literally have no idea what is going on on your servers.

You can use DevOps programs to provision and monitor Docker containers, but they are not optimized for containers. As DataDog, a cloud monitoring company, states in its report on Dockers in action, "The short lifespan and increased density of containers have a significant impact on infrastructure monitoring. They represent an increase in the number of things that must be monitored individually ".

The answer is: cloud orchestration tools. These monitor and manage the clustering and planning of containers. As of May 2017, there were three major cloud container orchestration programs: Docker Swarm, Kubernetes, and Mesosphere. They all still exist today, but Kubernetes is by far the most dominant cloud orchestration program.

Indeed, Mesosphere jumped on the bandwagon of Kubernetes. Docker announced that it will integrate Kubernetes into the Docker platform. Users can choose to use Kubernetes and / or Docker Swarm for orchestration.
Kubernetes has the largest community and is by far the most popular.

Docker knew this was coming. Hykes said at DockerCon EU in Copenhagen that the company added Kubernetes to its offering because it "gives our users and customers the ability to make orchestration choices with the added security, management and end-to-end experience of Docker that they expected from Docker from the start ".

Even if Kubernetes may be the winner in container orchestration, the containers themselves remain largely Docker's design (more information on design training courses). The Kubernetes training. Docker's technology will be with us for years to come.

Conclusions

In short, here's what Docker can do for you: it can get more applications running on the same hardware (see Hardware Seminar) than other technologies; it makes it easy for developers to quickly create ready-to-use container applications; and it makes it much easier to manage and deploy applications. When you put it all together, you understand why Docker went through the hype cycle so quickly,

Especially for CI / CD, Docker enables local development environments to be set up that are just like a live server; running multiple development environments from the same host with unique software, operating systems and configurations; testing projects on new or different servers; and the possibility that everyone can work on the same project with exactly the same settings, regardless of the local host environment. This allows developers to run the test suites that are important for CI / CD to quickly see if a new change is working properly.