OPNET-809: machineconfiguration/v1alpha1: add BGPVIPConfig CRD - #2972
OPNET-809: machineconfiguration/v1alpha1: add BGPVIPConfig CRD#2972mkowalski wants to merge 1 commit into
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@mkowalski: This pull request references OPNET-595 which is a valid jira issue. Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the epic to target the "5.0.0" version, but no target version was set. DetailsIn response to this:
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📝 WalkthroughWalkthroughAdded the Important Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional. ❌ Failed checks (1 error, 1 warning)
✅ Passed checks (13 passed)
Full details: Docstring CoverageExplanation No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 1 files. Full details: Stable And Deterministic Test NamesExplanation PASS. The pull request adds one YAML admission-test suite. Its suite name and all 15 case names are literal strings. The test generator passes each YAML Full details: Test Structure And QualityExplanation PASS. The pull request adds a declarative API validation suite, not handwritten Ginkgo Full details: Microshift Test CompatibilityExplanation PASS: The pull request adds a declarative CRD API integration suite, not a MicroShift-targeted OpenShift e2e test. The repository harness generates Ginkgo cases from the YAML and runs them with controller-runtime Full details: Single Node Openshift (Sno) Test CompatibilityExplanation PASS: The only added test artifact is a declarative CRD validation YAML file. The test generator uses API create/get operations and does not schedule pods, inspect nodes, drain nodes, or require HA topology. The Full details: Topology-Aware Scheduling CompatibilityExplanation PASS — The pull request changes only the BGPVIPConfig API, CRD manifests, generated API code, and validation tests. The changed objects are CustomResourceDefinition and custom-resource test data. The diff adds no Deployment, StatefulSet, DaemonSet, controller, replica, affinity, topology spread, node selector, toleration, or PodDisruptionBudget scheduling constraint. Therefore, the stated topology-aware scheduling failure conditions do not apply. Full details: Ote Binary Stdout ContractExplanation PASS: The pull request changes API declarations, scheme registration, generated code, OpenAPI data, and declarative YAML tests only. The diff adds no Full details: Ipv6 And Disconnected Network Test CompatibilityExplanation The added API test suite uses the hardcoded IPv4 peer address Resolution IPv6 and disconnected network compatibility notice: This test may contain IPv4 assumptions or external connectivity requirements that will fail in IPv6-only disconnected environments. Please verify your test works on IPv6 by running an additional CI job: Full details: No-Weak-CryptoExplanation The pull request introduces TCP MD5 authentication. The new Full details: Container-PrivilegesExplanation No container privilege violation was introduced. The pull request changes only Go API/generated files, CRD manifests, and CRD validation tests. The added manifests are a CustomResourceDefinition and API test document, not workload manifests. The added diff contains no Full details: No-Sensitive-Data-In-LogsExplanation PASS: The pull request adds API types, generated schemas, registration, and validation tests. The changed Go files contain no logging or output calls and import no logging packages. The password-related field stores only a Secret name reference; no password, token, or API key value is added or logged. Test data contains only example peer addresses, a node hostname, and a Secret name.
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Actionable comments posted: 2
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Verify each finding against current code. Fix only still-valid issues, skip the
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Inline comments:
In `@machineconfiguration/v1alpha1/types_bgpvipconfig.go`:
- Around line 139-144: Replace the Password string field in BGPVIPConfig with a
Kubernetes Secret reference, preserving optional configuration semantics. Update
both consumers of BGPVIPConfig authentication data to resolve the referenced
Secret and use its password value, removing all direct reads of the serialized
Password field.
- Around line 56-65: Update the validation rule on the communities field in
BGPVIPConfig to enforce a maximum of 65535 for both segments of two-part classic
communities while retaining the 4294967295 limit for three-part communities. In
machineconfiguration/v1alpha1/tests/bgpvipconfigs.machineconfiguration.openshift.io/BGPBasedVIPManagement.yaml
lines 154-176, change the test to reject 64512:4294967295 and add a valid
three-part boundary case.
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machineconfiguration/v1alpha1/zz_generated.crd-manifests/0000_80_machine-config_01_bgpvipconfigs.crd.yamlis excluded by!**/zz_generated.crd-manifests/*machineconfiguration/v1alpha1/zz_generated.deepcopy.gois excluded by!**/zz_generated*machineconfiguration/v1alpha1/zz_generated.featuregated-crd-manifests.yamlis excluded by!**/zz_generated*machineconfiguration/v1alpha1/zz_generated.featuregated-crd-manifests/bgpvipconfigs.machineconfiguration.openshift.io/BGPBasedVIPManagement.yamlis excluded by!**/zz_generated.featuregated-crd-manifests/**machineconfiguration/v1alpha1/zz_generated.model_name.gois excluded by!**/zz_generated*machineconfiguration/v1alpha1/zz_generated.swagger_doc_generated.gois excluded by!**/zz_generated*openapi/generated_openapi/zz_generated.openapi.gois excluded by!openapi/**,!**/zz_generated*openapi/openapi.jsonis excluded by!openapi/**
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machineconfiguration/v1alpha1/register.gomachineconfiguration/v1alpha1/tests/bgpvipconfigs.machineconfiguration.openshift.io/BGPBasedVIPManagement.yamlmachineconfiguration/v1alpha1/types_bgpvipconfig.go
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Assisted-By: Claude Fable 5 Signed-off-by: Mat Kowalski <mko@redhat.com>
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Amended (28f1fc5, still a single commit): the This comment was generated using AI. Please verify before acting on it. |
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Actionable comments posted: 1
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Inline comments:
In `@machineconfiguration/v1alpha1/types_bgpvipconfig.go`:
- Line 89: Update the XValidation rule on the BGP VIP hostname field to enforce
both the existing RFC 1123 pattern and a maximum length of 63 characters for
every dot-separated label, using a per-label validation such as
self.split('.').all(label, label.size() <= 63).
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⛔ Files ignored due to path filters (5)
machineconfiguration/v1alpha1/zz_generated.crd-manifests/0000_80_machine-config_01_bgpvipconfigs.crd.yamlis excluded by!**/zz_generated.crd-manifests/*machineconfiguration/v1alpha1/zz_generated.featuregated-crd-manifests/bgpvipconfigs.machineconfiguration.openshift.io/BGPBasedVIPManagement.yamlis excluded by!**/zz_generated.featuregated-crd-manifests/**machineconfiguration/v1alpha1/zz_generated.swagger_doc_generated.gois excluded by!**/zz_generated*openapi/generated_openapi/zz_generated.openapi.gois excluded by!openapi/**,!**/zz_generated*openapi/openapi.jsonis excluded by!openapi/**
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machineconfiguration/v1alpha1/types_bgpvipconfig.go
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Deep Review Verdict — BGPVIPConfig CRD (commit
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Deep-review findings implemented in e8a3577 (still a single squashed commit; full Blockers
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kube-api-linter (stricter than the current CI job): all 15 findings on this file resolved — Validation: full This comment was generated using AI. Please verify before acting on it. |
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Pull request overview
Adds a new feature-gated machineconfiguration.openshift.io/v1alpha1 configuration API (BGPVIPConfig) for admission-validated BGP peer configuration used by BGP-based VIP management, plus the corresponding generated OpenAPI/CRD artifacts and an integration validation suite.
Changes:
- Introduces
BGPVIPConfig/BGPVIPConfigSpec/ related supporting types and registers the new kinds. - Adds generated CRD manifests (feature-gated and merged) and OpenAPI schema updates for the new API.
- Adds a new integration testsuite YAML covering validation and update/status behaviors.
Reviewed changes
Copilot reviewed 9 out of 11 changed files in this pull request and generated 7 comments.
Show a summary per file
| File | Description |
|---|---|
| openapi/openapi.json | Adds OpenAPI definitions for the new BGPVIPConfig* types. |
| openapi/generated_openapi/zz_generated.openapi.go | Wires generated OpenAPI schema functions for the new types. |
| machineconfiguration/v1alpha1/zz_generated.swagger_doc_generated.go | Adds generated Swagger doc strings for the new API types/fields. |
| machineconfiguration/v1alpha1/zz_generated.model_name.go | Registers OpenAPI model names for the new types. |
| machineconfiguration/v1alpha1/zz_generated.featuregated-crd-manifests/bgpvipconfigs.machineconfiguration.openshift.io/BGPBasedVIPManagement.yaml | Introduces the feature-gated CRD manifest for BGPVIPConfig. |
| machineconfiguration/v1alpha1/zz_generated.featuregated-crd-manifests.yaml | Adds manifest metadata entry for the new CRD into the featuregated manifest index. |
| machineconfiguration/v1alpha1/zz_generated.deepcopy.go | Adds generated deepcopy implementations for the new types. |
| machineconfiguration/v1alpha1/zz_generated.crd-manifests/0000_80_machine-config_01_bgpvipconfigs.crd.yaml | Adds the merged CRD manifest for the new API under relevant feature sets. |
| machineconfiguration/v1alpha1/types_bgpvipconfig.go | Defines the new BGPVIPConfig API types, validation markers, and constants. |
| machineconfiguration/v1alpha1/tests/bgpvipconfigs.machineconfiguration.openshift.io/BGPBasedVIPManagement.yaml | Adds integration testsuite coverage for schema/CEL validation and status subresource behavior. |
| machineconfiguration/v1alpha1/register.go | Registers BGPVIPConfig and BGPVIPConfigList in the scheme. |
Files not reviewed (2)
- machineconfiguration/v1alpha1/zz_generated.deepcopy.go: Generated file
- machineconfiguration/v1alpha1/zz_generated.model_name.go: Generated file
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| // defaultPeers. When omitted, all nodes use defaultPeers. At most 256 | ||
| // entries, unique by hostname. |
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Done in d41a6db — hostOverrides now documents "when set, between 1 and 256 entries".
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| // hostname of the node this override applies to, as an RFC 1123 | ||
| // subdomain of at most 253 characters. It is compared verbatim against |
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Done in d41a6db — hostname doc now states non-empty (and, from the CodeRabbit round, the 253-char total with 63-char labels).
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| // port is the TCP port of the BGP session. When omitted, port 179 is | ||
| // used; this default is applied by the consumers and is subject to | ||
| // change over time. |
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Done in d41a6db — port doc now states the 1-65535 range.
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| // bfd determines whether the session is backed by BFD fast failure | ||
| // detection. Allowed values are "Enabled" and "Disabled". When omitted, | ||
| // BFD is disabled; this default is subject to change over time. |
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Done in d41a6db — bfd doc now describes the behavior of Enabled (BFD session, fast failure detection) vs Disabled (hold-timer only).
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| type BGPVIPPeer struct { | ||
| // peerAddress is the IP address of the BGP peer (IPv4 or IPv6) in | ||
| // canonical form (lowercase, no leading zeros, IPv6 zero-compressed), | ||
| // at most 45 characters; the session's address family follows the |
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Done in d41a6db — peerAddress doc now states between 2 and 45 characters.
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| // name is the metadata.name of the referenced Secret in the | ||
| // openshift-config namespace. Must be an RFC 1123 subdomain. |
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Done in d41a6db — Secret name doc now states non-empty, at most 253 characters with 63-char labels.
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| // ebgpMultiHop determines whether the session may cross multiple hops. | ||
| // Allowed values are "Enabled" and "Disabled". When omitted, multihop | ||
| // is disabled; this default is subject to change over time. |
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Done in d41a6db — ebgpMultiHop doc now describes Enabled (multi-hop peer) vs Disabled (directly connected).
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Typed, admission-validated configuration API for BGP-based VIP management (enhancement openshift/enhancements#1982, OPNET-595), gated on BGPBasedVIPManagement: a cluster-scoped singleton carrying the local ASN, the default BGP peer set, optional communities and per-host peer overrides, replacing the Dev Preview bgp-vip-config ConfigMap and the serialized-JSON ControllerConfigSpec.BGPVIPPeersJSON user surface (the JSON field remains as machine-config-operator internal transport). API conventions applied: Enabled/Disabled enums instead of booleans, integer-second timer fields (BGP wire-format uint16 seconds), no schema defaults (consumers default and godoc documents omitted behavior), list-map peers/overrides, CEL validation for the singleton name, peer IPs, timer relation and community segment ranges. Peer authentication is secret-only: passwordSecret references a kubernetes.io/basic-auth Secret in the openshift-config namespace ('password' key, 80-byte TCP MD5 limit) - passwords are never stored in this API; the shape mirrors frr-k8s's FRRConfiguration neighbor passwordSecret, which the cluster-network-operator maps it onto. Status carries observedGeneration and two conditions: Rendered (owned by machine-config-operator, set after the per-node peer configuration is applied to the ControllerConfig) and SessionsConfigured (owned by cluster-network-operator, set when the FRR session configuration has been rendered for application). Includes the integration test suite (validation matrix incl. dual-stack peers, host overrides, timer relation, community range and passwordSecret name validation). The consumers (installer, MCO, CNO) are implemented against the inline-password revision and were validated end to end on a live dual-stack baremetal cluster; their passwordSecret rework follows this API. Assisted-By: Claude Fable 5 Signed-off-by: Mat Kowalski <mko@redhat.com>
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@mkowalski: This pull request references OPNET-809 which is a valid jira issue. Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the story to target the "5.1.0" version, but no target version was set. DetailsIn response to this:
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Typed, admission-validated configuration API for BGP-based VIP management (enhancement openshift/enhancements#1982), gated on
BGPBasedVIPManagement(gate added in #2923). Replaces the Dev Previewbgp-vip-configConfigMap and the serialized-JSONControllerConfigSpec.BGPVIPPeersJSONuser surface — the JSON field remains as MCO-internal transport, so templates and baremetal-runtimecfg are untouched.What this API does
A cluster admin describes who the cluster peers with to advertise its API and Ingress VIPs over BGP; the operators translate that into per-node FRR configuration:
flowchart LR subgraph day0 ["install time"] IC["install-config<br/>platform.baremetal.bgpVIPConfig"] -->|installer generates| CR end CR["<b>BGPVIPConfig 'cluster'</b><br/>localASN, defaultPeers,<br/>communities, hostOverrides,<br/>passwordSecret refs"] SEC["Secret (openshift-config)<br/>kubernetes.io/basic-auth"] -.->|name reference| CR CR -->|"watch + render<br/>(honors hostOverrides)"| MCO["machine-config-operator<br/>per-node frr-peers.json<br/>via MachineConfig"] CR -->|"watch + render<br/>(defaultPeers)"| CNO["cluster-network-operator<br/>cluster-wide FRRConfiguration"] MCO -->|"status: Rendered"| CR CNO -->|"status: SessionsConfigured"| CR MCO --> NODE["node: frr-k8s static pod<br/>+ kube-vip (table 198)"] CNO --> NODE NODE <-->|"eBGP sessions,<br/>VIP /32 + /128 advertisements"| TOR["ToR routers<br/>(ECMP across healthy nodes)"]Day-2 edits to the CR reconfigure peering without node reboots (peers file changes are covered by a NodeDisruptionPolicy).
Shape
bgpvipconfigs.machineconfiguration.openshift.io/v1alpha1, cluster-scoped singletoncluster:spec.localASNspec.defaultPeerspeerAddressspec.communitiesn:nclassic (16-bit segments) orn:n:nlarge (32-bit segments), no leading zeros — CEL-checked rangesspec.hostOverrideshostname, optionaldefaultPeersfor that nodepeerAddressisIP() && ip.isCanonical()— one spelling per address, so the map key guarantees real uniquenesspeerASNpasswordSecretkubernetes.io/basic-authSecret inopenshift-config,passwordkey ≤80 bytes (kernel TCP-MD5 limit) — no inline password field existsportbfd,ebgpMultiHopEnabled/DisabledholdTimeSeconds,keepaliveTimeSecondsStatus: conditions
Rendered(MCO) andSessionsConfigured(CNO, render-level — explicitly documented as not asserting webhook acceptance or on-node application), written via SSA with distinct field managers;observedGenerationis MCO's, CNO progress rides the condition's ownobservedGeneration.API/Ingress VIPs are not duplicated here — consumers read them from the Infrastructure CR.
Examples
Minimal — one ToR, defaults everywhere:
Everything at once — dual-stack ToR pair with MD5 auth, BFD, tuned timers, communities, and a rack whose nodes peer with different ToRs:
The referenced Secret:
Conventions applied
Per dev-guide/api-conventions.md: no booleans, integer-second durations (BGP's wire format is uint16 seconds), no schema defaults (configuration API — consumers default, godoc documents omitted behavior),
omitempty,omitzerostruct references per the Go 1.24 guidance, singleton CEL onmetadata.name, conditions as alistType=map. kube-api-linter clean.Validation
Declarative integration suite included — 44 cases (118 specs across both CRD variants): the full CEL matrix (community formats/boundaries/leading zeros, canonical-IP, timer relation and RFC 4271 floor with all escape hatches, ASN/port boundaries, duplicate map keys, hostname/Secret-name label limits), plus
onUpdatecoverage for day-2 spec edits and status-subresource writes of both conditions.The three consumers (installer render, MCO watch/serialize + NodeDisruptionPolicy, CNO FRRConfiguration render) are implemented and were validated end to end on a live dual-stack baremetal cluster against the previous revision of this API: byte-identical rendered peer configuration vs the ConfigMap path, day-2 peer edits propagating in ~45s with zero node disruption, and deletion of the Dev Preview ConfigMap with no effect. Consumer PRs come once this merges (they currently vendor this branch).
Review trail on this PR: multi-specialist deep review, two CodeRabbit rounds, and a Copilot round — all findings addressed.
Design doc with the full decision trail (Option A Infrastructure-spec placement vs this dedicated CRD): bgp-vip-demo spec
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