Running your applications on a server has changed over the years: the service has become more affordable as time passes. This leads to the question: what will happen when all servers are full? Sure, you make more data centers, but is really more storage the solution?
In comes Docker, a service that allows you to store just what you need for an application in containers. The right amount of memory and specs for an excellent performance.
What is a container?
A container is a package of software that has all its dependencies in one place. This allows you to run an application fast and in a reliable way in different environments. This one-size-fits-all approach makes it a budget solution to have your apps online.
Docker is a container service that stores these packages. Code, runtime, system tools, system libraries, and settings, it’s all there. Just as if you had a Nissin cup: everything ready to make you a great soup, or in this case, run an app.
Docker container images run on its own engine, which is available for both Linux and Windows applications. The containers divide the software from their environment and ensure that it works the same way.
Why is it so popular?
Because it makes more applications run on the same old servers. Also, it’s effortless to package and send programs.
Dockers are lightweight, portable, and secure, and much cheaper than other virtualization systems.
Containers run natively on Linux and share the kernel (the core of an OS) of the host machine with other containers. It runs a discrete process, taking no more memory than any other executable.
On the other hand, a virtual machine (VM) (a container’s natural) competitor runs a full operating system with all the implications of that.
In general, VMs provide an environment with more resources than most applications need.
With Docker, scaling your application is a matter of spinning up new executables, not running massive VM hosts.
Containers and virtual machines are similar but function in a different way. They virtualize the operating system instead of the hardware, and they’re more portable and efficient.
This makes containers, and Docker, a better solution for startups and companies transforming to digital.
Have a question about Docker, or want to start a conversation? Let’s have a chat in the comments!