The UniFi VM boot-disk DataVolume (RWX + Block on longhorn-vm) failed to import:
CDI's non-root importer (UID 107, cap-drop ALL) hit
`blockdev: cannot open /dev/cdi-block-volume: Permission denied`.
Kubernetes only applies fsGroup ownership to *filesystem* volumes — it never
chowns a raw block device — and Longhorn's CSIDriver (fsGroupPolicy:
ReadWriteOnceWithFSType) skips fsGroup on RWX/Block volumes regardless, so the
device stays root:root. The CDI-documented fix is the container-runtime setting
`device_ownership_from_security_context`, exposed on k3s (>= v1.31.3+k3s1, this
cluster is v1.31.5) as `nonroot-devices: true`. It makes containerd set the
in-container device node's owner from the pod's securityContext.
Added to the Ansible-managed /etc/rancher/k3s/config.yaml alongside tls-san;
applied via the existing rolling `Restart k3s` handler (serial:1, kube-vip keeps
the API up, etcd holds 2/3). Node-scoped, security-neutral (pods stay non-root),
and preserves the longhorn-vm RWX/Block/migratable contract unchanged.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
First KubeVirt VM app + first real CDI http import. UniFi OS Server (UOS) is
Ubiquiti's current self-host product (the .deb is deprecated); it bundles UniFi
OS + Network app + its own datastore, so no MongoDB companion.
- apps/vms/unifi: CDI DataVolume (Ubuntu 24.04 cloud image -> longhorn-vm
RWX/Block, live-migratable) + VirtualMachine (evictionStrategy: LiveMigrate)
with cloud-init that installs podman/slirp4netns/jq and runs the UOS installer
NON-INTERACTIVELY. The installer URL is resolved at boot from Ubiquiti's public
firmware API (fw-update.ui.com/api/firmware-latest) — always-latest, no pinned
URL to maintain (currently UOS v5.1.37).
- L4 exposure: two LoadBalancer Services (TCP+UDP) sharing a pinned, L2-announced
Cilium VIP 192.168.1.54 (device inform/adoption + STUN can't ride the L7
Gateway); external-dns publishes unifi.home.keithjackson.dev. UI on :11443.
- default-deny + additive CNPs (controller ingress, egress, and CDI-importer
egress for the image pull).
- clusters/base/apps-vms.yaml: NON-GATING Flux Kustomization (wait:false,
dependsOn platform-config) — VMs are a separate lifecycle from the app waves,
so a slow VM import/install can't stall the app tier.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
jakman85andClaude Opus 4.8