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DevOps & observability · #k3s
Stop managing separate etcd clusters for small K8s deployments. Learn how K3s uses embedded dqlite to provide high availability with a tiny memory footprint and simplified operations.
K3s uses SQLite by default to reduce the memory overhead of etcd. Learn when to stick with SQLite for edge devices and when to migrate to an external database for high availability.
Confirm Traefik is running in kube-system, its Service is exposed via NodePort, and a test Ingress routes traffic. Covers prerequisites, verification commands, and recovery if Traefik was disabled.
Learn how to expose services in a K3s cluster with the default Traefik ingress, see a minimal Ingress and TLS example, and understand the constraints and common mistakes to avoid.
Learn how to import a running K3s cluster into Rancher using the cluster registration agent, enable monitoring, and deploy Helm charts while preserving the cluster’s original lifecycle.
Architecture note on K3s’ embedded SQLite datastore: requirements, minimal design, trust boundaries, operational checks, failure modes, and when to switch to an external store.
Learn when to use K3s' embedded SQLite datastore versus external options like MySQL or etcd, including performance limits and verification steps for small clusters.
K3s replaces etcd with SQLite by default to reduce overhead. Learn when to stick with SQLite for edge simplicity and when to migrate to an external database for high availability.
Learn how to implement K3s High Availability using embedded etcd to eliminate control plane single points of failure and ensure cluster resilience.
kubernetes
sqlite
rancher