The concept of containerization has its roots in the 1970s, with the creation of the chroot on Unix systems paving the way for Docker, released in 2013, making it easy to develop and run applications in different environments. Docker's popularity skyrocketed over the next few years and it quickly became the de facto standard for containerization. Partly because of its ease of use and its ability to package applications and their dependencies together in a single container, making it easy to develop and run applications in different environments.
Building applications inside Docker containers greatly simplified the scaling of cloud applications. Developers using Docker have also found that by using development tools that have native support and code generation for Docker, such as Amplication.com, higher quality applications can be built in less time.
What is Docker
Docker is a containerization transport tool that allows developers to build and run applications within containerized operating systems. These containers are packaged with all the parts needed to function as a standalone entity.
When the application runs, it runs inside the container, ensuring that it has the necessary dependencies and can be run on any machine with Docker installed. This makes it easy to run applications in various environments, such as on a developer's local machine, on a staging server, or in production.
Docker allows developers to easily build connected applications, which means that each part of the application can be developed and tested independently by test teams. Building and maintaining large and complex applications is more affordable, as components can be developed independently.
Docker also makes it easy to automate application development and management. Developers can use Docker to specify the environment in which their application runs, including required versions of libraries and dependencies, allowing applications to run consistently across environments.
Docker makes it easy to develop as well as run applications in various environments.
What is Kubernetes
Kubernetes is an open source orchestration software for containerized applications. Developed by Google and continuously updated by the Cloud Native Computing Foundation (CNCF).
At a high level, Kubernetes provides a platform-agnostic way to schedule and run programs in containers, such as those built using Docker. It helps you deploy and manage applications consistently and reliably, whether they run on a single server or across a cluster of machines.
One of the key features of Kubernetes is its ability to provide high availability for applications. It achieves this by automatically replicating the containers that make up an application across multiple nodes of a cluster and by using various techniques to ensure that the application remains accessible even if individual containers or nodes fail.
Another key feature of Kubernetes is its ability to automate application scaling. If an application's load increases, Kubernetes can automatically create new instances of the containers that make up the application and distribute the load among them. Conversely, if the load on an application decreases, Kubernetes can automatically kill idle applications to reduce resource consumption. Kubernetes also provides various other features that help you manage and run containerized applications, such as
- A configuration model that allows you to specify the desired state of your application and let Kubernetes ensure that the actual state corresponds to it.
- A wide range of networking options, including support for load balancing and ingress controllers.
- A powerful and extensible API that allows you to integrate Kubernetes with other tools and systems in your environment.
Overall, Kubernetes is a powerful and flexible platform for managing containerized applications and is widely used in a variety of environments, including public and private clouds, on-premises data centers, and hybrid environments.
In summary, Docker is a tool that allows you to build and run your applications in containers. At the same time, Kubernetes is the platform that allows you to manage and orchestrate these containers in a distributed environment.
Each virtual system application has advantages based on the requirements of each project. Containerization may not be what an organization needs but for some it is the way they want to develop their applications. Leveraging the right tools for the job goes a long way in ensuring high quality applications and reducing time to market.