61 lines
2.7 KiB
YAML
61 lines
2.7 KiB
YAML
 
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# Prepares each node for Longhorn (apps/longhorn.yaml) — the storage layer
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# this repo ships pre-installed. Applied identically to all three
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# control-plane nodes, alongside patch-controlplane.yaml.
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#
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# This file has TWO documents (separated by `---`), because it's making two
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# different kinds of change: a patch to the normal machine config, and a
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# standalone Talos resource that doesn't live inside `machine:`/`cluster:`
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# at all.
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#
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# --- Document 1: mount the volume into the kubelet's view ---
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# Talos runs the kubelet in its own isolated mount namespace. Without this,
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# a volume mounted at /var/mnt/longhorn on the node itself would be
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# invisible to any Pod using a hostPath-style mount there — which is
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# exactly how Longhorn's own manager and engine Pods access node storage.
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# This bind-mounts that same path into the kubelet's namespace so Pods can
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# actually see it. `rshared` matters specifically: it lets mounts Longhorn
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# creates later *underneath* this path (one per volume) propagate back out
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# to the host, instead of being invisible outside the container that made
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# them.
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#
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# --- Document 2: UserVolumeConfig ---
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# A Talos UserVolumeConfig tells Talos itself to find, format, and mount a
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# disk — no manual partitioning on your part. `diskSelector.match:
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# '!system_disk'` means "any disk that isn't the one Talos is installed
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# on" (never touches your OS disk), and `minSize: 900GiB` means "only
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# consider disks at least that large" — so if a node has more than one
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# extra disk, Talos won't accidentally pick a small one. Adjust `minSize`
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# if your nodes' data disks are smaller than 900GiB; just make sure it's
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# still large enough to exclude anything that *isn't* meant for Longhorn.
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# `grow: false` keeps the volume at its initial size even if the
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# underlying disk is later resized — deliberate here, so growing storage
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# is always a conscious decision (see docs/09-growing-up.md).
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#
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# The `name: longhorn` below is what determines the mount path Talos uses
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# — user volumes are always mounted at /var/mnt/<name>, which is why
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# Document 1 above and apps/longhorn/values.yaml both hardcode
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# /var/mnt/longhorn. Renaming this would mean updating both.
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#
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# >> Ask Claude: "how do I find out which of my disks Talos will actually
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# pick for this?" before you boot for real — worth confirming on your
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# specific hardware rather than assuming.
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machine:
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kubelet:
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extraMounts:
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- destination: /var/mnt/longhorn
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type: bind
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source: /var/mnt/longhorn
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options:
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- bind
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- rshared
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- rw
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---
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apiVersion: v1alpha1
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kind: UserVolumeConfig
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name: longhorn
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provisioning:
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diskSelector:
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match: "!system_disk"
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minSize: 900GiB
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grow: false
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