K3s

K3s is a fully compliant yet lightweight Kubernetes distribution specifically designed for running production Kubernetes workloads in resource-constrained environments. These environments include Edge computing, IoT devices, CI, and ARM-based systems. K3s is packaged as a single binary of less than 70MB, significantly reducing the dependencies and steps required to install, run, and auto-update a Kubernetes cluster.

Key features of K3s include its simplified and secure design, making it ideal for unattended, remote locations. It supports both ARM64 and ARMv7 architectures, making it suitable for devices as small as a Raspberry Pi. K3s is also a certified Kubernetes distribution, ensuring compatibility and reliability for production workloads.

The architecture of K3s differs from standard Kubernetes in that it consolidates several components into a single process, reducing the overall footprint. It replaces etcd with SQLite as the default datastore, further simplifying operations. However, it can also be configured to use etcd, MySQL, or PostgreSQL for HA setups.

K3s is great for edge computing, IoT deployments, and CI environments where a lightweight and easily manageable Kubernetes distribution is needed. It is designed to be easy to install and operate, making it accessible to users with varying levels of Kubernetes expertise. Its small size and low resource consumption make it an excellent choice for resource-constrained environments.