Docker & Kubernetes

Docker container image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries and settings. Docker container technology was launched in 2013 as an open source Docker Engine. It leveraged existing computing concepts around containers and specifically in the Linux world, primitives known as cgroups and namespaces. Docker’s technology is unique because it focuses on the requirements of developers and systems operators to separate application dependencies from infrastructure.

In the case of Docker containers – images become containers when they run on Docker Engine. Available for both Linux and Windows-based applications, containerized software will always run the same, regardless of the infrastructure. Containers isolate software from its environment and ensure that it works uniformly despite differences for instance between development and staging. Docker Engine powers millions of applications worldwide, providing a standardized packaging format for diverse applications. Docker Engine is the industry’s de facto container runtime that runs on various Linux and Windows Server operating systems. Docker creates simple tooling and a universal packaging approach that bundles up all application dependencies inside a container which is then run on Docker Engine.

Docker containers that run on Docker Engine:

• Standard: Docker created the industry standard for containers, so they could be portable anywhere
• Lightweight: Containers share the machine’s OS system kernel and therefore do not require an OS per application, driving higher server efficiencies and reducing server and licensing costs
• Secure: Applications are safer in containers and Docker provides the strongest default isolation capabilities in the industry.

Developing apps today requires so much more than writing code. Multiple languages, frameworks, architectures, and discontinuous interfaces between tools for each lifecycle stage creates enormous complexity. Docker simplifies and accelerates your workflow, while giving developers the freedom to innovate with their choice of tools, application stacks, and deployment environments for each project.

Click here to get Docker Engine for the most popular open source Linux distributions.

Kubernetes is an open source orchestration system for automating the management, placement, scaling and routing of containers that has become popular with developers and IT operations teams in recent years. It was first developed by Google and contributed to Open Source in 2014, and is now maintained by the Cloud Native Computing Foundation. There is an active Kubernetes community and ecosystem developing around Kubernetes with thousands of contributors and dozens of certified partners.

Why use Kubernetes?

Kubernetes has become the standard orchestration platform for containers. All the major cloud providers support it, making it the logical choice for organizations looking to move more applications to the cloud. Kubernetes provides a common framework to run distributed systems so development teams have consistent, immutable infrastructure from development to production for every project. Kubernetes can manage scaling requirements, availability, failover, deployment patterns, and more.

Kubernetes’ capabilities include:

• Service and process definition
• Service discovery and load balancing
• Storage orchestration
• Container-level resource management
• Automated deployment and rollback
• Container health management
• Secrets and configuration management

Click here to visit the download section of Kubernetes,

Docker and Kubernetes are two of the most popular technologies for containerized development. Docker is used to package applications into containers, while Kubernetes is used to orchestrate and manage those containers in production. 

Kubernetes changed how we develop and deploy containerized applications, providing a powerful orchestration platform that automates tasks such as scaling, load balancing, and self-healing. To realize the full potential of Kubernetes orchestration, your applications must be well-prepared and efficiently and securely developed from the start. That’s where Docker’s development tools come into play.

Docker is the original container engine that powers Kubernetes. Over the years, Docker’s suite of developer tools has significantly evolved to provide a comprehensive ecosystem for building, shipping, and running secure containers. Leveraging Docker’s tools with Kubernetes orchestration, developers can streamline the development process, ensure application security, and accelerate deployment.

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