k8s-launch-kit-validate

l8k: Validate

PREREQUISITE: Read ../k8s-launch-kit-shared/SKILL.md for install paths, global flags, and exit codes.

This workflow uses the default host target; --target host is equivalent. The CLI snapshots validation arguments and runs the standalone Host validation and report service through the target registry; checks and report semantics are unchanged.

Verify that a previously generated and deployed NVIDIA networking deployment is correctly applied and matches the selected Network Operator release.

What it checks

1. Network Operator Helm release version. Reads the chart's appVersion from any release Secret named sh.helm.release.v1.<release>.v<N> whose release name contains "network-operator", in the operator namespace. Compares with the version expected by networkOperator.selectedRelease in cluster-config.yaml (looked up in l8k's embedded release catalog).
2. Manifest state. Every YAML manifest under --deployment-files (skipping example workloads and Helm values.yaml) is fetched from the cluster and classified by the per-Kind resource-state registry. NicConfigurationTemplate and NicFirmwareTemplate wait for the operator-populated status.nicDevices list to reflect current node, NIC type, PCI-address, serial-number, and part-number selectors and validate only the named devices. Their propagated template payload and condition observedGeneration must also be current; unrelated discovered NIC configuration state is ignored. A configuration template checks FirmwareUpdateInProgress only for a matched device with spec.firmware, so a stale firmware condition does not block a deployment with no NicFirmwareTemplate. Each manifest is reported READY, IN-PROGRESS, ERROR, or MISSING.
3. Connectivity matrix. By default, l8k validate applies the generated example DaemonSet, waits for ready pods, and runs source-bound icmp, rping, and ib_write_bw tests. When validation.gpuDirect.enabled is true and ib_write_bw is selected, a distinct DMA-BUF bandwidth family uses the connected GPU index for each source and destination rail. Profile templates declare both validation containers: the release-specific full-runtime DOCA image for the RDMA checks and netshoot for ICMP and route checks. GPUDirect-enabled templates set LD_LIBRARY_PATH on the DOCA container to prefer host-injected NVIDIA driver libraries over bundled CUDA compatibility libraries. Validate applies the generated DaemonSet without runtime container injection. The default mode is strict.

If --deployment-files contains only user-provided *example*.yaml test DaemonSets, run connectivity only. If values.yaml or any non-example YAML is also present, run the complete validation pipeline. The DaemonSet does not need to be generated by Launch Kit and no separate manifest flag is used.

Validation also reports deploy-preflight drift without remediating it. SriovNetworkPoolConfig, SriovNetworkNodePolicy, and OVSNetwork objects labeled with spectrumx.nvidia.com/owner-name are excluded from stray results because the Spectrum-X operator owns them as children of SpectrumXRailPoolConfig.

Exit code is non-zero (4) on any missing manifest, version mismatch, or gating connectivity failure. A skipped, empty, or incomplete connectivity-only matrix also exits 4; every selected check family must produce a gating test, and non-gating cross-rail observations do not count. Version checks soft-skip when prerequisites are absent, but connectivity requires a user-owned cluster config.

If networkOperator.skipHelmChart: true is set, or the user passes --skip-network-operator-helm, both Helm release/version and values checks are reported as skipped. Component-version, manifest, stray-resource, connectivity, and report stages still run.

Usage

l8k validate [--user-config <PATH>] [--deployment-files <DIR>] [--kubeconfig <PAT

Flags

Connectivity Modes

• quick: all same-rail node pairs plus one non-gating cross-rail canary per source-rail/destination-rail mapping.
• full: every source rail × every destination rail × every ordered pod pair; cross-rail results are reported but do not gate pass/fail.
• strict: full matrix. Cross-rail gates by profile.routing: source-based must succeed, destination-based must stay isolated.

All checks are source-bound. Before every ICMP probe, validate confirms that ip route get <dst> from <src> selects the requested source interface. A route using another interface is reported as not connected for that rail pair rather than forcing traffic onto it. When the source rail is selected, ICMP uses ping -I <src-ip> so source-based policy rules participate naturally. Routing diagnostics expect the source interface for source-based routing and the destination interface for destination-based routing. rping uses -I <src-ip>, and ib_write_bw uses --bind_source_ip <src-ip>. GPUDirect adds --use_cuda=<endpoint-index> --use_cuda_dmabuf independently on the client and server. Treat missing or ambiguous connectedGPU topology as a failure; never substitute GPU 0. Pull Secrets come from networkOperator.imagePullSecrets and must exist in every validation namespace.

With the default --connectivity-timeout=0, validate logs one total automatic budget after planning the matrix. The calculation reflects the enabled test families, per-command limits, ordered pod-pair batches, bounded workload setup, cleanup, and a safety margin. A positive flag value replaces that calculation with a user-supplied hard deadline.

The minimum connectivity config is:

The test workload must be an apps/v1 DaemonSet with a name, namespace, netshoot route helper, and an RDMA tools container when RDMA checks are selected. When GPUDirect is enabled with ib_write_bw, each clusterConfig group must list workers and east-west PFs with a non-negative rail and connectedGPU: GPU<N>.

Examples

Debug logs show the endpoint inventory, plan, source-route cache statistics, static checks, stages, RDMA batches, cleanup, report writes, elapsed time, and remaining timeout. Trace adds bounded commands and per-test stdout/stderr. Failed RDMA server logs are collected before the temporary files and test workload are removed. Add --keep only when follow-up pod inspection is needed.

Output

Text mode prints a short report:

JSON mode (--output json) emits one object with versionCheck, manifests, and summary fields.

When this skill activates

Trigger phrases include: "validate my deployment", "is my cluster correct", "are all the manifests applied", "does the chart version match", "did the deploy succeed", or any discrepancy claim about expected vs deployed state.

See Also

• k8s-launch-kit-deploy — apply manifests
• k8s-launch-kit-troubleshoot — investigate failures uncovered by validate
• k8s-launch-kit-shared — global flags and exit codes