fix(virtual-machine): guard Kube-OVN IP lookup - #4013
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Included review availability: Your plan provides up to 8 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughThe VM template now gates the OVN IP lookup and MAC/IP annotations on the ChangesKube-OVN capability handling
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to The chart now avoids querying the Kube-OVN IP API when it is unavailable, allowing VM instances to render on clusters using other CNIs; no actionable merge-blocking risk remains after normal checks and review. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In `@packages/apps/vm-instance/tests/kubeovn_capability_test.yaml`:
- Around line 8-9: Add coverage for the Kube-OVN capability branch in the test
configuration: advertise kubeovn.io/v1/IP, provide an IP object through lookup,
and assert both expected OVN annotations. If equivalent coverage already exists,
reference that test instead of adding a duplicate.
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packages/apps/vm-instance/templates/vm.yamlpackages/apps/vm-instance/tests/kubeovn_capability_test.yaml
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Aleksei Sviridkin (lexfrei)
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Aleksei Sviridkin (lexfrei)
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NOT LGTM — the guard is right, the test doesn't pin it.
Business context: vm-instance can't render on a cluster without the Kube-OVN CRDs, Helm's lookup fails the whole render when the kind is not served.
Blockers
B1: the regression test passes without the fix
packages/apps/vm-instance/tests/kubeovn_capability_test.yaml:9
helm-unittest's fake lookup returns nothing for an unserved kind, it never errors the way a live cluster does. With apiVersions: [] and no mocked objects the annotations are absent with or without the guard.
Evidence: I ran this suite on top of the vm.yaml from origin/main, no guard: 2 passed. Same on this branch. The failure this PR fixes (Helm pkg/engine/lookup_func.go propagates the discovery error for an unserved group) can't be reproduced in helm-unittest at all.
The guard can be deleted and the suite stays green.
Fix: mock the IP object via kubernetesProvider and test both sides. API advertised, the annotations carry the mocked values. API not advertised, the annotations are absent even though the object is there. I checked this locally, the second case is red on origin/main and green here. It also closes the open bot comment on this line.
suite: vm-instance Kube-OVN IP pinning follows API discovery
release:
name: test-vm
namespace: tenant-test
templates:
- templates/vm.yaml
set:
fullnameOverride: test-vm
instanceType: ""
instanceProfile: ""
resources:
cpu: 1
sockets: 1
memory: 1Gi
_cluster:
scheduling:
dedicatedNodesForWindowsVMs: "false"
kubernetesProvider:
scheme:
"kubeovn.io/v1/IP":
gvr:
group: kubeovn.io
version: v1
resource: ips
namespaced: false
objects:
- apiVersion: kubeovn.io/v1
kind: IP
metadata:
name: test-vm.tenant-test
spec:
macAddress: "00:00:5E:00:53:01"
ipAddress: "192.0.2.10"
tests:
- it: pins the Kube-OVN IP and MAC when the IP API is served
capabilities:
apiVersions:
- kubeovn.io/v1/IP
asserts:
- equal:
path: spec.template.metadata.annotations["ovn.kubernetes.io/mac_address"]
value: "00:00:5E:00:53:01"
- equal:
path: spec.template.metadata.annotations["ovn.kubernetes.io/ip_address"]
value: "192.0.2.10"
- it: skips the lookup when the IP API is not served, even if an IP object exists
capabilities:
apiVersions: []
asserts:
- notExists:
path: spec.template.metadata.annotations["ovn.kubernetes.io/mac_address"]
- notExists:
path: spec.template.metadata.annotations["ovn.kubernetes.io/ip_address"]Replace the current suite with this one, don't add a second file.
Non-blocking follow-ups
- The commit body is empty. One line with the why (Helm
lookuperrors on an unserved API group, so the chart couldn't render without the Kube-OVN CRDs) is whatgit logreaders need. hook_securitycontext_test.yamlopens with a short comment on why the lookup is mocked. The new suite would read better with the same.
| templates: | ||
| - templates/vm.yaml | ||
| capabilities: | ||
| apiVersions: [] |
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This passes on the origin/main vm.yaml too: the unittest fake lookup returns nothing for an unserved kind, so nothing here depends on the guard. Mock the IP object and assert both sides, verified suite is in the review body.
Helm's `lookup` propagates the discovery error when the requested API group is not served, so the vm-instance chart could not render at all on clusters without the Kube-OVN CRDs. Gate the IP lookup behind `.Capabilities.APIVersions.Has "kubeovn.io/v1/IP"`. The regression suite mocks the IP object through kubernetesProvider and pins both sides: with the API advertised the annotations carry the mocked MAC and IP, without it they are absent even though the object exists. helm-unittest's fake lookup never errors on an unserved kind, so only the second case distinguishes the guard; it fails on main and passes here. Assisted-By: GPT-5 <noreply@openai.com> Signed-off-by: Loïc Fontaine <lfinmauritius@users.noreply.github.com>
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Pushed b142d27. The suite is replaced with yours as-is (same file, no second one), with a header comment on why the IP object is mocked, and the commit body now carries the why. Reproduced locally with helm-unittest 1.1.2 before pushing: the old suite passes on origin/main without the guard, the new second case is red there (both |
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LGTM — the suite now pins the guard: with the IP object mocked and the API not advertised it fails on the origin/main template and passes here, and the advertised case renders the mocked values.
Non-blocking follow-ups
- Third case of the same contract is missing: API advertised, no IP object yet, which is every first render on a Kube-OVN cluster (the IP appears after the pod exists).
objects: []under a per-testkubernetesProviderwithapiVersions: [kubeovn.io/v1/IP]and the twonotExistsasserts covers it; the branch itself predates this PR.
I edited the PR body's test paragraph to describe the current suite.
2 participants
What this PR does
Guards the Kube-OVN
IPlookup behind API discovery. Thevm-instancechart now renders on clusters using another CNI instead of trying to query a CRD that is not installed.The Helm regression suite mocks the IP object through
kubernetesProviderand pins both sides: withkubeovn.io/v1/IPadvertised the annotations carry the mocked MAC and IP, without it they are absent even though the object exists, which is the branch the guard adds. helm-unittest's fake lookup never errors on an unserved kind, so only the second case distinguishes the guard; it fails on main and passes here.Open PRs #3991, #3978, #3931, and #3900 touch the same template. Their current hunks do not alter this lookup; #3900 adds secondary-interface annotations immediately after it, so it is the only nearby merge hunk to watch.
Screenshots
Not applicable; there is no UI change.
Downstream repositories
Release note
Summary by CodeRabbit
Bug Fixes
Tests