Docker & Kubernetes
Full video on: FreeCodeCamp / Amigoscode
Docker
Docker is a set of platform as a service (PaaS) products that use OS-level virtualization to deliver software in packages called containers. Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels. Because all the containers share the services of a single operating system kernel, they use fewer resources than virtual machines.
Cheatsheet
Extra
- Containerize Your Spring Application With Docker
- Running Postgres And PgAdmin4 In Containers
- Run MySQL And phpMyAdmin In Containers
Kubernetes
Kubernetes, commonly stylized as K8s, is an open-source container-orchestration system for automating computer-application deployment, scaling, and management. It was originally designed by Google and is now maintained by the Cloud Native Computing Foundation. It aims to provide a "platform for automating deployment, scaling, and operations of application containers across clusters of hosts". It works with a range of container tools and runs containers in a cluster, often with images built using Docker. Kubernetes originally interfaced with the Docker runtime through a " Dockershim"; however, the shim has since been deprecated in favor of directly interfacing with the container through containerd, or replacing Docker with a runtime that is compliant with the Container Runtime Interface (CRI) introduced by Kubernetes in 2016.
Cheatsheet
Linux Containers (LXC)
LXC (Linux Containers) is an operating-system-level virtualization method for running multiple isolated Linux systems (containers) on a control host using a single Linux kernel.
The Linux kernel provides the cgroups functionality that allows limitation and prioritization of resources (CPU, memory, block I/O, network, etc.) without the need for starting any virtual machines. It also provides namespace-isolation that allows complete isolation of an application's view of the operating environment, including process trees, networking, user IDs and mounted file systems.
LXD is a system container-manager, basically an alternative to LXC's tools. In fact, it is building on top of LXC to provide a new, better user experience.