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Developer tools · #k3os
Learn how to identify and fix k3OS nodes that halt at the initramfs prompt because cloud‑init cannot locate or parse its user‑data.
A step‑by‑step guide to diagnose why k3OS nodes cannot pull container images, covering containerd logs, network checks, and registry authentication.
Eliminate edge node drift using k3OS's immutable root filesystem and declarative config.yaml. Learn how to bake custom configurations into ISOs for zero-touch deployment.
Step‑by‑step guide to diagnose why k3OS automatic OS upgrades fail on bare‑metal nodes, covering service status, logs, network, disk space, cloud‑config, and hardware compatibility.
Learn how k3OS uses an immutable root filesystem and a dedicated config partition to automate k3s cluster deployments and eliminate configuration drift.
Learn how k3OS’s read‑only root filesystem enables atomic, rollback‑safe upgrades for edge Kubernetes nodes, and what you must change in your workflow to work within its immutable model.
Retrieving Large Datasets Consistently In k3os, a lightweight Kubernetes node OS, the Kubernetes API’s limit and continue parameters provide a stateless way to bound list responses. An alternative is to use a watch with a resourceVersion to receive near‑real‑time updates. Concrete Constraint The goal is to enumerate thousands of a single resource type (e.g.,
Symptom A cloud-init-style config.yaml that provisions SSH keys, network settings, and a k3s token works when iteratively rebooted on a local VM, yet the same configuration causes k3s agent nodes to join with an outdated token on first production cold boot. Context k3os processes /var/lib/rancher/k3os/config.yaml (or a boot-time datasource) during early boot
Rootfs Overlay Update and k3s Version Alignment The goal is to keep a specific k3s major version stable across OS upgrades. The update.strategy setting defaults to a best‑effort alignment that does not explicitly pin the k3s binary, so an OS refresh can pull in a newer k3s release without notice. This drift can leave a node running an incompatible k3s binary
k3s
kubernetes