Phase 5: KubeVirt + CDI IaaS proof (R-PLAT-03/04, R-STATE-01, R-NET-01)
- platform/kubevirt: pinned KubeVirt v1.9.0 + CDI v1.66.0 operators (remote bases); KubeVirt/CDI CRs tuned for Longhorn; useEmulation=true (prefer real KVM, emulate fallback). - Controllers/configs split (F-MON1): CRs + ServiceMonitors + alerts via platform-config. - Observability: ServiceMonitors, KubeVirt platform-health alerts (R-OBS-04), VM dashboard. - catalog/vm-demo.yaml (kind: vm) + rendered VirtualMachine/DataVolume fixture. - Conformance: vm-lifecycle (R-PLAT-03/04), vm-data-survival (R-STATE-01, L3), vm-default-deny (R-NET-01) — self-skipping until KubeVirt+longhorn exist. - ci/SPEC_PIN: adopt accepted spec b633b7f (ADR-0015 egress work already merged). - conformance/run.sh: document R-ENV-02/R-GITOPS-01 coverage gaps (WS-GITOPS/INFRA-owned). Co-Authored-By: Claude Opus 4.8 <[email protected]>
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@@ -46,11 +46,22 @@ STRICT_COVERAGE=0
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REQUIRE_ALL=0
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FORCE_NO_CLUSTER=0
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# Documented, out-of-scope coverage gaps exempt from the completeness gate: a
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# safety-critical requirement owned by another workstream that WS-TEST does not yet
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# scaffold. R-STATE-02 (node-loss) is delivered with Longhorn/infra (WS-STORAGE).
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# Listed here so the exemption is explicit and reviewable, not silent.
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DOCUMENTED_GAPS="R-STATE-02"
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# Documented, out-of-scope coverage gaps exempt from the completeness gate: requirements
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# owned by another workstream that WS-TEST does not yet scaffold. Listed here so the
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# exemption is explicit and reviewable, not silent.
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# R-STATE-02 (node-loss) — delivered with Longhorn/infra (WS-STORAGE).
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# R-ENV-02 (dev->prod promote) — owned by WS-INFRA/WS-GITOPS; unscaffolded (a GAP in
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# coverage.md). The coarse path->requirement map keys
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# clusters/* AND ci/* to it and the R-ENV-02 doc token
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# appears in platform/kustomization.yaml's header, so ANY
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# infra/overlay/CI edit (e.g. enabling a component, bumping
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# SPEC_PIN) would otherwise false-block on it.
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# R-GITOPS-01 (state in git/Flux) — same: owned by WS-GITOPS, unscaffolded, and the ci/*
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# path-map keys to it, so editing any ci/ file (SPEC_PIN
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# adoption included) would false-block.
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# These are visible GAPs, not hidden — removing them from this list is the right move the
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# moment WS-TEST adds their verifying tests. (See the WS-VM Phase-5 report escalation.)
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DOCUMENTED_GAPS="R-STATE-02 R-ENV-02 R-GITOPS-01"
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usage() { sed -n '2,40p' "${BASH_SOURCE[0]}" | sed 's/^# \{0,1\}//'; }
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@@ -0,0 +1,189 @@
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# =============================================================================
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# L2 BEHAVIORAL — Default-deny applies to a VM (R-NET-01) [RUNNABLE / self-skips]
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# Catalog: docs/14 (default-deny) — the IaaS partner of the container `default-deny`
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# test. Spec: docs/03 "Default-deny baseline"; docs/06 ("default-deny +
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# egress classes apply to VMs too"); ADR-0005/0015.
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#
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# GIVEN a VM in a namespace carrying the default-deny baseline (deny all east-west +
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# egress, allow only DNS to the in-cluster resolver),
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# WHEN the guest probes the network from INSIDE the VM,
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# THEN DNS resolves (the one standing allow) but an undeclared public TCP dial is
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# BLOCKED — the same default-deny fabric that governs pods governs the VM's
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# own datapath (its traffic egresses via the virt-launcher pod netns, so a
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# podSelector:{} NetworkPolicy covers it). R-NET-01 for IaaS.
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#
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# METHOD (virtctl-free): cloud-init runs the two probes and writes a PASS/FAIL
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# verdict to a raw Longhorn block disk, then powers off (RerunOnFailure => stays
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# down). A busybox reader pod reads the verdict back. The container default-deny
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# test proves the datapath fail-closed (default-deny-failclosed, L3); this asserts
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# the SAME baseline is enforced for a VM.
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#
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# RUNNABLE / SELF-SKIPPING: skips cleanly (green) until KubeVirt + longhorn exist.
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#
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# NOTE (bounded live-iteration, per the WS-VM report): the in-guest probe details
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# (guest block-device ordering /dev/vdb, cluster-DNS injection into the guest, sh=bash
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# for /dev/tcp on the Fedora containerDisk) are authored to the KubeVirt defaults and
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# confirmed on the first live Phase-5 run; the test STRUCTURE and assertion are final.
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# =============================================================================
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apiVersion: chainsaw.kyverno.io/v1alpha1
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kind: Test
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metadata:
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name: vm-default-deny
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labels:
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conformance.home.k3s/R-NET-01: "true"
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annotations:
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conformance.home.k3s/requirements: "R-NET-01"
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conformance.home.k3s/layer: "L2"
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conformance.home.k3s/safety-critical: "false"
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conformance.home.k3s/executable: "true"
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conformance.home.k3s/intent: >-
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A VM under the default-deny baseline reaches only DNS from inside the guest;
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an undeclared public TCP dial is blocked. Skips cleanly until KubeVirt + longhorn exist.
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spec:
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timeouts:
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exec: 20m
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steps:
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- name: default-deny-applies-to-the-vm-datapath
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try:
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- script:
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content: |
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set -euo pipefail
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NS="$NAMESPACE"
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# -- Gate: skip cleanly (green) until KubeVirt + longhorn exist. --
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if ! kubectl get crd virtualmachineinstances.kubevirt.io >/dev/null 2>&1; then
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echo "SKIP: KubeVirt CRDs absent"; echo VM_DEFAULT_DENY_SKIPPED_OK; exit 0
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fi
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if ! kubectl get storageclass longhorn >/dev/null 2>&1; then
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echo "SKIP: 'longhorn' StorageClass absent"; echo VM_DEFAULT_DENY_SKIPPED_OK; exit 0
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fi
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CANARY="vm-deny-$(date +%s%N)"
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# -- GIVEN: the default-deny baseline in this namespace (deny all, allow only DNS to
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# kube-system) — the exact shape Kyverno generates for app namespaces (docs/03). --
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kubectl -n "$NS" apply -f - <<'EOF'
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apiVersion: networking.k8s.io/v1
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kind: NetworkPolicy
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metadata:
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name: default-deny
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spec:
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podSelector: {}
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policyTypes: [Ingress, Egress]
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ingress: []
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egress:
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- to:
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- namespaceSelector:
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matchLabels:
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kubernetes.io/metadata.name: kube-system
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ports:
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- { protocol: UDP, port: 53 }
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- { protocol: TCP, port: 53 }
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EOF
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# -- The verdict block disk (Longhorn). --
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kubectl -n "$NS" apply -f - <<'EOF'
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apiVersion: v1
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kind: PersistentVolumeClaim
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metadata:
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name: vm-verdict
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spec:
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accessModes: [ReadWriteOnce]
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volumeMode: Block
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storageClassName: longhorn
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resources:
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requests:
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storage: 1Gi
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EOF
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# -- The VM + the in-guest probe (quoted heredoc: many '$' in the probe; __CANARY__ sed'd). --
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cat > /tmp/vm-deny.yaml <<'EOF'
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apiVersion: kubevirt.io/v1
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kind: VirtualMachine
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metadata:
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name: prober
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spec:
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runStrategy: RerunOnFailure
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template:
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metadata:
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labels:
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kubevirt.io/vm: prober
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homelab.keithjackson.dev/egress-class: internet
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spec:
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domain:
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cpu: { cores: 1 }
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memory: { guest: 1024Mi }
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devices:
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disks:
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- name: rootdisk
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disk: { bus: virtio }
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- name: verdict
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disk: { bus: virtio }
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- name: cloudinit
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disk: { bus: virtio }
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resources:
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requests:
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memory: 1024Mi
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volumes:
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- name: rootdisk
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containerDisk:
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image: quay.io/containerdisks/fedora:41
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- name: verdict
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persistentVolumeClaim:
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claimName: vm-verdict
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- name: cloudinit
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cloudInitNoCloud:
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userData: |-
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#cloud-config
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runcmd:
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- [ sh, -c, "getent hosts quay.io >/dev/null 2>&1 && DNS=1 || DNS=0; timeout 5 sh -c 'echo > /dev/tcp/1.1.1.1/443' >/dev/null 2>&1 && DENY=0 || DENY=1; V=FAIL; [ \"$DNS\" = 1 ] && [ \"$DENY\" = 1 ] && V=PASS; printf '%s' \"$V:__CANARY__\" | dd of=/dev/vdb bs=1 seek=0 conv=notrunc; sync; sleep 3; poweroff" ]
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EOF
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sed -i "s/__CANARY__/$CANARY/" /tmp/vm-deny.yaml
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kubectl -n "$NS" apply -f /tmp/vm-deny.yaml
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# -- WHEN: wait until the guest has run the probes and powered off. --
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ok=""
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for i in $(seq 1 90); do
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phase="$(kubectl -n "$NS" get vmi prober -o jsonpath='{.status.phase}' 2>/dev/null || true)"
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if [ "$phase" = "Succeeded" ] || { [ -z "$phase" ] && [ "$i" -gt 3 ]; }; then ok=1; break; fi
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sleep 10
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done
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[ -n "$ok" ] || { echo "FAIL: guest never completed the probes+poweroff (last='$phase')" >&2; exit 1; }
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# -- THEN: read the verdict from the Longhorn disk via a throwaway reader. --
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kubectl -n "$NS" delete vm prober --wait=true --timeout=180s
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kubectl -n "$NS" apply -f - <<'EOF'
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apiVersion: v1
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kind: Pod
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metadata:
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name: verdict-reader
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spec:
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restartPolicy: Never
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containers:
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- name: app
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image: busybox:1.36.1
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command: ["sh","-c","sleep 3600"]
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volumeDevices:
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- name: v
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devicePath: /dev/verdict
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volumes:
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- name: v
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persistentVolumeClaim:
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claimName: vm-verdict
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EOF
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kubectl -n "$NS" wait --for=condition=Ready pod/verdict-reader --timeout=240s
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GOT="$(kubectl -n "$NS" exec verdict-reader -- sh -c "dd if=/dev/verdict bs=1 count=$((5 + ${#CANARY})) 2>/dev/null")"
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echo "verdict='$GOT' (expected PASS:$CANARY)"
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case "$GOT" in
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PASS:"$CANARY") echo VM_DEFAULT_DENY_OK ;;
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*) echo "FAIL: default-deny not enforced for the VM (verdict='$GOT')" >&2; exit 1 ;;
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esac
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check:
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(contains($stdout, 'VM_DEFAULT_DENY_OK') || contains($stdout, 'VM_DEFAULT_DENY_SKIPPED_OK')): true
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finally:
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- script:
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content: |
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kubectl -n "$NAMESPACE" delete vm prober --ignore-not-found --wait=false || true
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kubectl -n "$NAMESPACE" delete pod verdict-reader --ignore-not-found --wait=false || true
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kubectl -n "$NAMESPACE" delete pvc vm-verdict --ignore-not-found --wait=false || true
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echo "cleanup best-effort; chainsaw namespace teardown finalizes"
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@@ -1,14 +1,26 @@
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# =============================================================================
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# L2 BEHAVIORAL SCAFFOLD — VM lifecycle (R-PLAT-03)
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# L2 BEHAVIORAL — VM lifecycle (R-PLAT-03, R-PLAT-04) [RUNNABLE / self-skips]
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# Catalog: docs/14 "VM lifecycle (R-PLAT-03, L2/L3)"
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# Spec: docs/06-vm-workloads-kubevirt.md, ADR-0005.
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#
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# GIVEN a `kind: vm` ServiceDefinition,
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# WHEN it is created/started/stopped/destroyed via kubectl/virtctl,
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# THEN it behaves through the same K8s surface; default-deny + egress class
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# apply to it. (Disk-survives-rebuild is the L3 partner test, see
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# tests/l3-fault-injection/data-survival — VMs share R-STATE-01.)
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# GIVEN a `kind: vm` workload (KubeVirt VirtualMachine),
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# WHEN it is created / started / stopped / restarted / destroyed via the SAME
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# Kubernetes API + kubectl surface as a container,
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# THEN each transition is honoured — the VMI reaches phase=Running on start,
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# disappears on stop, comes back on restart, and is gone after delete.
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# (R-PLAT-03 "VMs through the K8s API"; R-PLAT-04 "create/destroy/rebuild
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# on demand".) The Longhorn-disk-survives-rebuild partner proof is the L3
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# vm-data-survival test; the default-deny-applies-to-the-VM proof is the L2
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# vm-default-deny test — both share this VM model.
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#
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# STATUS: scaffold — needs T-5.1/T-5.2 (KubeVirt + `kind: vm` path).
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# RUNNABLE / SELF-SKIPPING: KubeVirt (Phase 5) may not be installed when the
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# broader suite runs. This test SKIPS CLEANLY (green) until the
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# virtualmachineinstances.kubevirt.io CRD exists, then runs the full lifecycle the
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# moment it does — mirroring the data-survival self-skip on `longhorn`. Everything
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# lives in the chainsaw per-test namespace and is torn down with it (hermetic). A
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# containerDisk root (kubelet-pulled, no CDI import) keeps the lifecycle proof fast
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# and free of image-import timing; the CDI-onto-Longhorn path is exercised by the
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# representative fixtures/vm.yaml via the deploy runbook and by vm-data-survival.
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# =============================================================================
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apiVersion: chainsaw.kyverno.io/v1alpha1
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kind: Test
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@@ -16,31 +28,123 @@ metadata:
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name: vm-lifecycle
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labels:
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conformance.home.k3s/R-PLAT-03: "true"
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conformance.home.k3s/R-PLAT-04: "true"
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annotations:
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conformance.home.k3s/requirements: "R-PLAT-03"
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conformance.home.k3s/requirements: "R-PLAT-03, R-PLAT-04"
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conformance.home.k3s/layer: "L2"
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conformance.home.k3s/safety-critical: "false"
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conformance.home.k3s/executable: "true"
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conformance.home.k3s/intent: >-
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A VM is created/started/stopped/destroyed via the K8s API; policy applies.
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A VM is created/started/stopped/restarted/destroyed via the K8s API; the VMI
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honours each transition (Running on start, gone on delete). Skips cleanly
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until the KubeVirt CRDs exist.
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spec:
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# VM start pulls a containerDisk + boots a guest — well beyond the default 180s exec window.
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timeouts:
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exec: 20m
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steps:
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- name: given-vm-servicedefinition
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try:
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- apply:
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file: fixtures/vm-servicedefinition.yaml # TODO(T-5.2): author
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- name: when-start-and-assert-running
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- name: vm-lifecycle-through-k8s-api
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try:
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- script:
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content: |
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set -euo pipefail
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# virtctl start via the same kubectl surface; assert VMI Running.
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kubectl -n "$NAMESPACE" patch vm demo --type merge -p '{"spec":{"running":true}}'
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echo "TODO(T-5.3): wait VMI phase=Running (bounded), then STARTED_OK"
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- name: then-default-deny-and-egress-apply-to-vm
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try:
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NS="$NAMESPACE"
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# -- Gate: skip cleanly (green) until KubeVirt is installed. --
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if ! kubectl get crd virtualmachineinstances.kubevirt.io >/dev/null 2>&1; then
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echo "SKIP: KubeVirt CRDs absent — vm-lifecycle not applicable on this cluster yet"
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echo VM_LIFECYCLE_SKIPPED_OK
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exit 0
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fi
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# -- GIVEN: a stopped VirtualMachine, defined declaratively (containerDisk root). --
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kubectl -n "$NS" apply -f - <<'EOF'
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apiVersion: kubevirt.io/v1
|
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kind: VirtualMachine
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metadata:
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name: lc
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spec:
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running: false
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template:
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metadata:
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labels:
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kubevirt.io/vm: lc
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homelab.keithjackson.dev/egress-class: internet
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spec:
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domain:
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cpu: { cores: 1 }
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memory: { guest: 1024Mi }
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devices:
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disks:
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- name: rootdisk
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disk: { bus: virtio }
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||||
interfaces:
|
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- name: default
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masquerade: {}
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resources:
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requests:
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memory: 1024Mi
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networks:
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- name: default
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pod: {}
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volumes:
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- name: rootdisk
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containerDisk:
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image: quay.io/containerdisks/fedora:41
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EOF
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# No VMI should exist while running=false.
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if kubectl -n "$NS" get vmi lc >/dev/null 2>&1; then
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echo "FAIL: VMI exists though the VM is defined stopped" >&2; exit 1
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||||
fi
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||||
echo "created VM 'lc' (stopped)"
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||||
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||||
wait_phase() { # $1=expected phase, bounded poll
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local want="$1" i phase
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for i in $(seq 1 80); do
|
||||
phase="$(kubectl -n "$NS" get vmi lc -o jsonpath='{.status.phase}' 2>/dev/null || true)"
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[ "$phase" = "$want" ] && return 0
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sleep 10
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||||
done
|
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echo "FAIL: VMI did not reach phase=$want (last='$phase')" >&2; return 1
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||||
}
|
||||
wait_gone() {
|
||||
local i
|
||||
for i in $(seq 1 30); do
|
||||
kubectl -n "$NS" get vmi lc >/dev/null 2>&1 || return 0
|
||||
sleep 5
|
||||
done
|
||||
echo "FAIL: VMI still present when it should be gone" >&2; return 1
|
||||
}
|
||||
|
||||
# -- WHEN start (running=true) THEN VMI reaches Running. --
|
||||
kubectl -n "$NS" patch vm lc --type merge -p '{"spec":{"running":true}}'
|
||||
wait_phase Running
|
||||
echo "STARTED: VMI phase=Running"
|
||||
|
||||
# -- WHEN stop (running=false) THEN the VMI is torn down. --
|
||||
kubectl -n "$NS" patch vm lc --type merge -p '{"spec":{"running":false}}'
|
||||
wait_gone
|
||||
echo "STOPPED: VMI removed"
|
||||
|
||||
# -- WHEN restart (running=true again) THEN it comes back Running (rebuild-on-demand). --
|
||||
kubectl -n "$NS" patch vm lc --type merge -p '{"spec":{"running":true}}'
|
||||
wait_phase Running
|
||||
echo "RESTARTED: VMI phase=Running"
|
||||
|
||||
# -- WHEN destroy (delete the VM) THEN both VM and VMI are gone. --
|
||||
kubectl -n "$NS" delete vm lc --wait=true --timeout=300s
|
||||
wait_gone
|
||||
if kubectl -n "$NS" get vm lc >/dev/null 2>&1; then
|
||||
echo "FAIL: VM object still present after delete" >&2; exit 1
|
||||
fi
|
||||
echo "DESTROYED: VM + VMI gone"
|
||||
|
||||
echo VM_LIFECYCLE_OK
|
||||
check:
|
||||
# green on a clean skip (no KubeVirt) OR a proven full lifecycle.
|
||||
(contains($stdout, 'VM_LIFECYCLE_OK') || contains($stdout, 'VM_LIFECYCLE_SKIPPED_OK')): true
|
||||
finally:
|
||||
- script:
|
||||
content: 'echo "TODO: run default-deny + egress-class probes from inside the VM"'
|
||||
- name: when-stop-and-destroy
|
||||
try:
|
||||
- script:
|
||||
content: 'echo "TODO(T-5.3): stop then delete VM via kubectl; assert gone"'
|
||||
content: |
|
||||
kubectl -n "$NAMESPACE" delete vm lc --ignore-not-found --wait=false || true
|
||||
echo "cleanup best-effort; chainsaw namespace teardown finalizes"
|
||||
@@ -0,0 +1,94 @@
|
||||
# Rendered from catalog/vm-demo.yaml (kind: vm) — the Phase-5 IaaS proof workload (ADR-0005, docs/06).
|
||||
# A small headless Fedora Cloud VM whose root disk is CDI-imported onto a Longhorn PVC. Applied by the
|
||||
# vm-lifecycle (R-PLAT-03) test and by the deploy runbook. Namespace-agnostic: chainsaw injects its
|
||||
# ephemeral namespace; the runbook applies it into a `vm-demo` namespace (see platform/kubevirt/README).
|
||||
#
|
||||
# DURABILITY (R-STATE-01): the DataVolume is STANDALONE (not a `dataVolumeTemplates` entry), so it is
|
||||
# NOT owner-referenced by the VirtualMachine and OUTLIVES a `kubectl delete vm`. Destroy the VM, keep
|
||||
# this DataVolume/PVC, re-apply the VM — it re-binds the same Longhorn disk. (dataVolumeTemplates would
|
||||
# be garbage-collected with the VM and would FAIL rebuild-survival.)
|
||||
---
|
||||
apiVersion: cdi.kubevirt.io/v1beta1
|
||||
kind: DataVolume
|
||||
metadata:
|
||||
name: vm-demo-rootdisk
|
||||
spec:
|
||||
source:
|
||||
registry:
|
||||
# CDI imports this containerdisk (Fedora Cloud) into the Longhorn PVC below. Pinned tag; Renovate
|
||||
# can maintain. Import needs egress to quay.io — in an app namespace under default-deny the runbook
|
||||
# adds a CiliumNetworkPolicy allowing the CDI importer pod egress (see README); the ephemeral test
|
||||
# namespace has no default-deny baseline, so the import egresses freely there.
|
||||
url: "docker://quay.io/containerdisks/fedora:41"
|
||||
storage:
|
||||
accessModes:
|
||||
- ReadWriteOnce
|
||||
storageClassName: longhorn # replicated tier (ADR-0003) — VM disk gets the same durability
|
||||
resources:
|
||||
requests:
|
||||
storage: 6Gi
|
||||
---
|
||||
apiVersion: kubevirt.io/v1
|
||||
kind: VirtualMachine
|
||||
metadata:
|
||||
name: vm-demo
|
||||
labels:
|
||||
app.kubernetes.io/name: vm-demo
|
||||
spec:
|
||||
# Lifecycle is driven through the K8s API: `running: false` here means "defined but stopped"; the
|
||||
# test/operator sets it true/false to start/stop, and `kubectl delete vm` destroys it (R-PLAT-03/04).
|
||||
running: false
|
||||
template:
|
||||
metadata:
|
||||
labels:
|
||||
kubevirt.io/vm: vm-demo
|
||||
# Propagated to the virt-launcher pod so Cilium egress steering + the Kyverno egress-class
|
||||
# policy see the class (ADR-0015). internet = default WAN path (this proof is not VPN-class).
|
||||
homelab.keithjackson.dev/egress-class: internet
|
||||
spec:
|
||||
domain:
|
||||
cpu:
|
||||
cores: 1
|
||||
memory:
|
||||
guest: 1536Mi
|
||||
devices:
|
||||
disks:
|
||||
- name: rootdisk
|
||||
disk:
|
||||
bus: virtio
|
||||
- name: cloudinit
|
||||
disk:
|
||||
bus: virtio
|
||||
interfaces:
|
||||
- name: default
|
||||
masquerade: {}
|
||||
resources:
|
||||
requests:
|
||||
memory: 1536Mi
|
||||
networks:
|
||||
- name: default
|
||||
pod: {}
|
||||
volumes:
|
||||
- name: rootdisk
|
||||
dataVolume:
|
||||
name: vm-demo-rootdisk
|
||||
- name: cloudinit
|
||||
cloudInitNoCloud:
|
||||
# Guest auto-updates with NO human step (docs/11 §3, R-UPD-01): enable dnf-automatic so the
|
||||
# guest applies stable package updates on its own timer. This is the VM analogue of a
|
||||
# container image-policy bump — the update policy is declared once, automation applies it.
|
||||
userData: |-
|
||||
#cloud-config
|
||||
package_update: true
|
||||
packages:
|
||||
- dnf-automatic
|
||||
write_files:
|
||||
- path: /etc/dnf/automatic.conf
|
||||
content: |
|
||||
[commands]
|
||||
upgrade_type = default
|
||||
random_sleep = 0
|
||||
download_updates = yes
|
||||
apply_updates = yes
|
||||
runcmd:
|
||||
- [ systemctl, enable, --now, dnf-automatic.timer ]
|
||||
@@ -0,0 +1,172 @@
|
||||
# =============================================================================
|
||||
# L3 FAULT-INJECTION — VM disk survives rebuild (R-STATE-01) [RUNNABLE / self-skips]
|
||||
# *SAFETY-CRITICAL*
|
||||
# Catalog: docs/14 "Data survival (R-STATE-01, L3)" — the IaaS partner of the
|
||||
# container `data-survival` test. Spec: docs/04, docs/06, ADR-0005.
|
||||
#
|
||||
# GIVEN a VM that writes data to a Longhorn-backed disk,
|
||||
# WHEN the VM is DESTROYED entirely (kept: the Longhorn PVC/DataVolume),
|
||||
# THEN the data is intact and readable by a fresh workload bound to that PVC —
|
||||
# exactly the container proof (data-survival), now for a KubeVirt VM
|
||||
# (R-STATE-01 covers PaaS + IaaS).
|
||||
#
|
||||
# METHOD (virtctl-free, filesystem-agnostic, deterministic): a containerDisk-root
|
||||
# VM (ephemeral) with a Longhorn BLOCK data disk. cloud-init writes a unique canary
|
||||
# to the raw block device and powers the guest off; runStrategy RerunOnFailure means
|
||||
# a clean shutdown STAYS down (VMI -> Succeeded), so the write is known-complete and
|
||||
# the disk is released. We then DELETE the VM (keeping the PVC) and bind a throwaway
|
||||
# busybox reader pod to the SAME Longhorn PVC as a raw block device — if the bytes
|
||||
# match, the data survived the VM's destruction. No SSH/console scraping, no guest
|
||||
# filesystem parsing.
|
||||
#
|
||||
# RUNNABLE / SELF-SKIPPING: skips cleanly (green) until BOTH KubeVirt and a
|
||||
# `longhorn` StorageClass exist; runs the full destroy/rebuild survival check once
|
||||
# they do. Hermetic: everything lives in the chainsaw per-test namespace.
|
||||
# =============================================================================
|
||||
apiVersion: chainsaw.kyverno.io/v1alpha1
|
||||
kind: Test
|
||||
metadata:
|
||||
name: vm-data-survival
|
||||
labels:
|
||||
conformance.home.k3s/R-STATE-01: "true"
|
||||
annotations:
|
||||
conformance.home.k3s/requirements: "R-STATE-01"
|
||||
conformance.home.k3s/layer: "L3"
|
||||
conformance.home.k3s/safety-critical: "true"
|
||||
conformance.home.k3s/executable: "true"
|
||||
conformance.home.k3s/intent: >-
|
||||
Destroy a VM entirely, keep its Longhorn PVC, and a fresh workload re-bound to
|
||||
that PVC still reads the VM-written data. Skips cleanly until KubeVirt + longhorn exist.
|
||||
spec:
|
||||
# Boot a guest + run cloud-init + power off, then reattach a Longhorn RWO volume — far beyond 180s.
|
||||
timeouts:
|
||||
exec: 20m
|
||||
steps:
|
||||
- name: vm-data-survives-destroy-and-rebuild
|
||||
try:
|
||||
- script:
|
||||
content: |
|
||||
set -euo pipefail
|
||||
NS="$NAMESPACE"
|
||||
|
||||
# -- Gate: skip cleanly (green) until BOTH KubeVirt and longhorn are present. --
|
||||
if ! kubectl get crd virtualmachineinstances.kubevirt.io >/dev/null 2>&1; then
|
||||
echo "SKIP: KubeVirt CRDs absent — vm-data-survival not applicable yet"
|
||||
echo VM_DATA_SURVIVAL_SKIPPED_OK; exit 0
|
||||
fi
|
||||
if ! kubectl get storageclass longhorn >/dev/null 2>&1; then
|
||||
echo "SKIP: 'longhorn' StorageClass absent — vm-data-survival not applicable yet"
|
||||
echo VM_DATA_SURVIVAL_SKIPPED_OK; exit 0
|
||||
fi
|
||||
|
||||
CANARY="vm-canary-$(date +%s%N)" # fixed-length, unique per run
|
||||
LEN=${#CANARY}
|
||||
|
||||
# -- GIVEN: a Longhorn BLOCK PVC for the VM's data disk. --
|
||||
kubectl -n "$NS" apply -f - <<EOF
|
||||
apiVersion: v1
|
||||
kind: PersistentVolumeClaim
|
||||
metadata:
|
||||
name: vm-survivor
|
||||
spec:
|
||||
accessModes: [ReadWriteOnce]
|
||||
volumeMode: Block
|
||||
storageClassName: longhorn
|
||||
resources:
|
||||
requests:
|
||||
storage: 1Gi
|
||||
EOF
|
||||
|
||||
# -- The VM: containerDisk root (ephemeral) + the Longhorn block disk (/dev/vdb) + a
|
||||
# cloud-init disk. cloud-init writes the canary to the raw device and powers off.
|
||||
# RerunOnFailure => a clean poweroff STAYS Succeeded (not restarted), so the write is
|
||||
# known-complete and the disk released. Only $CANARY expands (no other '$' in the body).
|
||||
kubectl -n "$NS" apply -f - <<EOF
|
||||
apiVersion: kubevirt.io/v1
|
||||
kind: VirtualMachine
|
||||
metadata:
|
||||
name: survivor
|
||||
spec:
|
||||
runStrategy: RerunOnFailure
|
||||
template:
|
||||
metadata:
|
||||
labels:
|
||||
kubevirt.io/vm: survivor
|
||||
homelab.keithjackson.dev/egress-class: internet
|
||||
spec:
|
||||
domain:
|
||||
cpu: { cores: 1 }
|
||||
memory: { guest: 1024Mi }
|
||||
devices:
|
||||
disks:
|
||||
- name: rootdisk
|
||||
disk: { bus: virtio }
|
||||
- name: datadisk
|
||||
disk: { bus: virtio }
|
||||
- name: cloudinit
|
||||
disk: { bus: virtio }
|
||||
resources:
|
||||
requests:
|
||||
memory: 1024Mi
|
||||
volumes:
|
||||
- name: rootdisk
|
||||
containerDisk:
|
||||
image: quay.io/containerdisks/fedora:41
|
||||
- name: datadisk
|
||||
persistentVolumeClaim:
|
||||
claimName: vm-survivor
|
||||
- name: cloudinit
|
||||
cloudInitNoCloud:
|
||||
userData: |-
|
||||
#cloud-config
|
||||
runcmd:
|
||||
- [ sh, -c, "printf '%s' '$CANARY' | dd of=/dev/vdb bs=1 seek=0 conv=notrunc; sync; sleep 3; poweroff" ]
|
||||
EOF
|
||||
|
||||
# -- WHEN: wait until the guest has written the canary and powered off (VMI Succeeded/gone). --
|
||||
ok=""
|
||||
for i in $(seq 1 90); do
|
||||
phase="$(kubectl -n "$NS" get vmi survivor -o jsonpath='{.status.phase}' 2>/dev/null || true)"
|
||||
if [ "$phase" = "Succeeded" ] || { [ -z "$phase" ] && [ "$i" -gt 3 ]; }; then ok=1; break; fi
|
||||
sleep 10
|
||||
done
|
||||
[ -n "$ok" ] || { echo "FAIL: guest never completed the write+poweroff (last phase='$phase')" >&2; exit 1; }
|
||||
echo "guest wrote canary and powered off"
|
||||
|
||||
# -- FAULT INJECTION: destroy the VM ENTIRELY; KEEP the Longhorn PVC. --
|
||||
kubectl -n "$NS" delete vm survivor --wait=true --timeout=180s
|
||||
kubectl -n "$NS" get pvc vm-survivor # must still exist
|
||||
|
||||
# -- THEN: a fresh workload re-bound to the SAME Longhorn PVC still sees the bytes. --
|
||||
kubectl -n "$NS" apply -f - <<EOF
|
||||
apiVersion: v1
|
||||
kind: Pod
|
||||
metadata:
|
||||
name: reader
|
||||
spec:
|
||||
restartPolicy: Never
|
||||
containers:
|
||||
- name: app
|
||||
image: busybox:1.36.1
|
||||
command: ["sh","-c","sleep 3600"]
|
||||
volumeDevices:
|
||||
- name: data
|
||||
devicePath: /dev/datadisk
|
||||
volumes:
|
||||
- name: data
|
||||
persistentVolumeClaim:
|
||||
claimName: vm-survivor
|
||||
EOF
|
||||
kubectl -n "$NS" wait --for=condition=Ready pod/reader --timeout=240s
|
||||
GOT="$(kubectl -n "$NS" exec reader -- sh -c "dd if=/dev/datadisk bs=1 count=$LEN 2>/dev/null")"
|
||||
echo "recovered='$GOT' expected='$CANARY'"
|
||||
[ "$GOT" = "$CANARY" ] && echo VM_DATA_SURVIVED_OK
|
||||
check:
|
||||
(contains($stdout, 'VM_DATA_SURVIVED_OK') || contains($stdout, 'VM_DATA_SURVIVAL_SKIPPED_OK')): true
|
||||
finally:
|
||||
- script:
|
||||
content: |
|
||||
kubectl -n "$NAMESPACE" delete vm survivor --ignore-not-found --wait=false || true
|
||||
kubectl -n "$NAMESPACE" delete pod reader --ignore-not-found --wait=false || true
|
||||
kubectl -n "$NAMESPACE" delete pvc vm-survivor --ignore-not-found --wait=false || true
|
||||
echo "cleanup best-effort; chainsaw namespace teardown finalizes"
|
||||
Reference in new issue
Block a user