k8s-starter-pack/apps/longhorn/values.yaml

# Values for the upstream Longhorn chart, nested under `longhorn:` (the
# dependency's name in Chart.yaml).
longhorn:
  defaultSettings:
    # Must match the mount path from the UserVolumeConfig in
    # talos/patch-longhorn.yaml (/var/mnt/<name>) — this is what points
    # Longhorn at the dedicated data disk instead of its own default path
    # on the root filesystem, which on Talos is ephemeral/unsuited for
    # real data anyway.
    defaultDataPath: /var/mnt/longhorn
    # Only nodes explicitly labelled `node.longhorn.io/create-default-disk=true`
    # become storage nodes. This keeps Longhorn from trying to create a disk on
    # the Raspberry Pi control planes, which deliberately have no data disk.
    createDefaultDiskLabeledNodes: true
    # There are two independent storage workers, one on Gimli and one on
    # Titus. Three replicas could never schedule; two keeps one complete copy
    # on each host and remains readable if either worker fails. This setting
    # only affects volumes created through Longhorn's own UI—Kubernetes PVCs
    # actually read numberOfReplicas from the StorageClass below instead, so
    # both must be kept in sync.
    defaultReplicaCount: 2
  # The default StorageClass Longhorn's chart creates reads numberOfReplicas
  # from here, not from defaultSettings above. Every PVC that doesn't name a
  # storageClassName goes through this class, so this is the value that
  # actually governs replica count for real workloads.
  persistence:
    defaultClassReplicaCount: 2
    # Longhorn's own headroom settings, kept conservative: stop scheduling
    # new replicas onto a disk once free space drops below these
    # thresholds, so the cluster degrades gracefully instead of actually
    # filling a disk.
    storageMinimalAvailablePercentage: 25
    storageReservedPercentageForDefaultDisk: 30
  preUpgradeChecker:
    # Longhorn's own pre-upgrade check runs as a Job that expects to reach
    # an upgrade-responder service on the internet by default. Harmless to
    # leave on, but pointless for a learning cluster and one less thing to
    # explain — off by default here.
    jobEnabled: false