55 lines
3.9 KiB
YAML
55 lines
3.9 KiB
YAML
---
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# external-snapshotter — the cluster-wide CSI snapshot control plane (Phase 2, storage).
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#
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# WHY: Longhorn's CSI driver (driver.longhorn.io) can create CSI VolumeSnapshots, but the
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# `snapshot.storage.k8s.io` API (VolumeSnapshot / VolumeSnapshotContent / VolumeSnapshotClass)
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# and the snapshot-controller that reconciles them are NOT part of k3s or of Longhorn — they are
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# a SEPARATE, cluster-singleton component (kubernetes-csi/external-snapshotter). Without it the
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# CRDs are absent (only `snapshots.longhorn.io` + the kubevirt.io snapshot CRDs exist), so:
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# * no VolumeSnapshotClass can be created (item 2), and
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# * CDI cannot do SNAPSHOT smart-clone (item 3) — it falls back to slow host-assisted `copy`,
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# which leaves the default virt StorageClass "degraded" (CDIDefaultStorageClassDegraded).
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# Installing it here (controllers pass) registers the CRDs; the VolumeSnapshotClass that CONSUMES them
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# is applied by platform-config (dependsOn: platform), and the CDI StorageProfiles that set
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# `cloneStrategy: snapshot` by platform-config-cdi (dependsOn: platform-config — their own CRD is
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# created by cdi-operator only after the `CDI` CR reconciles; see clusters/base/platform-config-cdi.yaml).
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#
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# CONTROLLERS/CONFIGS SPLIT (F-MON1): this is the CONTROLLERS half. The snapshot.storage.k8s.io
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# CRDs are registered by the `client/config/crd` base below; the snapshot-controller Deployment
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# (into kube-system, upstream default) reconciles VolumeSnapshots. Custom resources that use these
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# CRDs (the Longhorn VolumeSnapshotClass, item 2) live in platform-config so the CRDs exist first.
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#
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# VERSION (Renovate-maintained): external-snapshotter v8.2.0.
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# * The v8.x line updated its Kubernetes deps to 1.31 at v8.1.0. This cluster is now k3s v1.36.4,
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# so the v8.2.0 pin is NO LONGER verified against the running Kubernetes version — RE-CHECK it
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# for 1.36 (a newer external-snapshotter line may be the version-matched choice). Pin left as-is
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# pending that revalidation.
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# * snapshot.storage.k8s.io CRDs are served at v1 (GA) — driver.longhorn.io speaks v1, so
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# Longhorn CSI snapshots + CDI snapshot-clone work against these CRDs.
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# * The upstream setup manifest pins the controller image to an older v8.0.x tag; the `images`
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# transformer below re-pins it to v8.2.0 so the running controller matches the CRD version.
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# * The `client/config/crd` base also ships the beta VolumeGroupSnapshot CRDs; that feature is
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# gated OFF in the controller (no --enable-volume-group-snapshots arg), so they are inert.
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#
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# VENDORED (was remote github bases). The two upstream kustomize dirs are built to LOCAL files
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# (crds.yaml, snapshot-controller.yaml) at v8.2.0 and committed here. Previously these were REMOTE
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# bases (github.com/...?ref=v8.2.0) that Flux's kustomize-controller `git fetch`ed on EVERY reconcile;
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# those fetches intermittently hit the controller's 27s timeout -> "kustomize build failed" -> the
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# WHOLE `platform` tier flaked (a transient GitHub slowness stalled every downstream app). Local files
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# make the build OFFLINE + deterministic. NOTE: platform/kubevirt still uses the same remote-base
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# pattern and carries the same latent fragility (vendor it too if it flakes).
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# RE-VENDOR on a version bump:
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# kubectl kustomize "https://github.com/kubernetes-csi/external-snapshotter/client/config/crd?ref=vX.Y.Z" > crds.yaml
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# kubectl kustomize "https://github.com/kubernetes-csi/external-snapshotter/deploy/kubernetes/snapshot-controller?ref=vX.Y.Z" > snapshot-controller.yaml
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apiVersion: kustomize.config.k8s.io/v1beta1
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kind: Kustomization
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resources:
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- crds.yaml
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- snapshot-controller.yaml
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images:
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# renovate: datasource=github-releases depName=kubernetes-csi/external-snapshotter
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# Controller image == CRD version. A version bump = re-vendor crds.yaml + snapshot-controller.yaml
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# at the new tag (see header) AND bump this newTag.
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- name: registry.k8s.io/sig-storage/snapshot-controller
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newTag: v8.7.0
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