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DevOps & observability · #k3s
Learn how to set up a three‑node k3s cluster with embedded etcd for high availability. Follow a step‑by‑step guide, verify health, backup snapshots, and avoid common pitfalls.
k3OS injects cluster identity only during first boot via cloud-init. This architecture note covers the smallest viable design, trust boundaries, operational checks, and failure modes for K3s agent registration.
k3OS makes k3s nodes reliable at the edge by using an immutable read-only root with a writable overlay and image-based atomic updates, forcing configuration to be declarative instead of ad-hoc.
k3OS can auto‑join a k3s cluster using a pre‑configured token and TLS certs. This guide details the minimal design, trust boundaries, operational checks, failure modes, and when the setup needs to evolve.
Guide to choosing between SQLite, etcd, and external SQL for K3s. Compare quorum requirements, failure domains, and implementation steps for high-availability state management.
Discover how Mirantis’ k3OS rolling update service lets you upgrade your Kubernetes cluster with minimal downtime. Learn the workflow, a step‑by‑step example, and key trade‑offs to keep your production environment secure and up to date.
Learn how K3s uses SQLite to eliminate etcd overhead for edge computing, when to stick with the default storage, and how to verify your backend configuration.
When a k3s HA cluster with an external etcd fails to start, the logs typically show connection errors and the API server pods crash. This guide walks through a quick diagnosis – from endpoint reachability to TLS validation – and outlines fixes and when to seek help.
Learn how to choose between SQLite and embedded etcd for K3s clusters, including implementation steps for edge devices and high-availability production environments.
k3os
kubernetes
sqlite