{"record":{"id":"654f99f1a9b76e9f","repo":"kubernetes/kops","slug":"building-menu-for-q-w","errorCode":null,"errorMessage":"building menu for %q: %w","messagePattern":"building menu for %q: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"channels/pkg/cmd/apply_channel.go","lineNumber":209,"sourceCode":"\t}\n\n\tkubernetesVersion, err := semver.ParseTolerant(kubernetesVersionInfo.GitVersion)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"cannot parse kubernetes version %q\", kubernetesVersionInfo.GitVersion)\n\t}\n\n\t// Remove Pre and Patch, as they make semver comparisons impractical\n\tkubernetesVersion.Pre = nil\n\n\tif len(args) == 0 {\n\t\treturn fmt.Errorf(\"at least one channel URL is required\")\n\t}\n\n\tvar merr error\n\tfor _, channelLocation := range args {\n\t\tmenu, err := buildMenu(f.VFSContext(), kubernetesVersion, channelLocation)\n\t\tif err != nil {\n\t\t\tmerr = multierr.Append(merr, fmt.Errorf(\"building menu for %q: %w\", channelLocation, err))\n\t\t\tcontinue\n\t\t}\n\t\tif err := applyMenu(ctx, menu, f.VFSContext(), k8sClient, cmClient, dynamicClient, restMapper, options.Yes); err != nil {\n\t\t\tmerr = multierr.Append(merr, fmt.Errorf(\"applying %q: %w\", channelLocation, err))\n\t\t}\n\t}\n\treturn merr\n}\n\nfunc applyMenu(ctx context.Context, menu *channels.AddonMenu, vfsContext *vfs.VFSContext, k8sClient kubernetes.Interface, cmClient certmanager.Interface, dynamicClient dynamic.Interface, restMapper *restmapper.DeferredDiscoveryRESTMapper, apply bool) error {\n\t// channelVersions is the list of installed addons in the cluster.\n\t// It is keyed by <namespace>:<addon name>.\n\tchannelVersions, err := getChannelVersions(ctx, k8sClient)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"cannot fetch channel versions from namespaces: %w\", err)\n\t}\n\n\tupdates, needUpdates, err := getUpdates(ctx, menu, k8sClient, cmClient, channelVersions)","sourceCodeStart":191,"sourceCodeEnd":227,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/channels/pkg/cmd/apply_channel.go#L191-L227","documentation":"RunApplyChannel builds an addon menu for each channel location argument. When buildMenu fails for a location, the error is wrapped as 'building menu for %q' and accumulated into a multierr, so remaining locations are still processed. The wrapped cause is typically URL parsing failure, the legacy-addon rejection, or LoadAddons/GetCurrent failure.","triggerScenarios":"Calling `kops apply channel <location>` where url.Parse fails, the location is relative (legacy-addon path), or the addon.yaml cannot be loaded/processed.","commonSituations":"Malformed channel URL (bad characters), using a deprecated bare addon name like networking.flannel, unreachable or invalid channel manifest.","solutions":["Read the wrapped cause; verify each location is a valid absolute URL before running","Replace legacy bare addon names with kOps managed addons in the cluster spec","Fix network/VFS access if the underlying cause is a fetch failure","Re-run; multierr reports each failing location independently"],"exampleFix":"// before\nerr := RunApplyChannel(ctx, f, out, []string{\"networking.flannel\"}, options)\n// after\nloc := \"https://raw.githubusercontent.com/example/addons/networking.addons.k8s.io/v1.28.0/addon.yaml\"\nif u, uerr := url.Parse(loc); uerr != nil || !u.IsAbs() {\n\treturn fmt.Errorf(\"invalid channel location %q\", loc)\n}\nerr := RunApplyChannel(ctx, f, out, []string{loc}, options)","handlingStrategy":"validation","validationCode":"u, err := url.Parse(channelLocation)\nif err != nil {\n\treturn fmt.Errorf(\"invalid channel location %q: %v\", channelLocation, err)\n}\nif !u.IsAbs() {\n\treturn fmt.Errorf(\"channel location %q must be an absolute URL (legacy addons are deprecated)\", channelLocation)\n}","typeGuard":"func isValidChannelLocation(loc string) bool {\n\tu, err := url.Parse(loc)\n\treturn err == nil && u.IsAbs()\n}","tryCatchPattern":"if err := RunApplyChannel(ctx, f, out, args, options); err != nil {\n\tif merrs, ok := err.(multierr.Error); ok {\n\t\tfor _, e := range merrs.Errors() {\n\t\t\tlog.Printf(\"channel apply failed: %v\", e)\n\t\t}\n\t}\n}","preventionTips":["Always pass absolute https:// URLs to apply channel","Quote shell arguments containing special characters","Prefer managed addons in the cluster spec over ad-hoc channel applies"],"tags":["cli","addons","channel","error-wrapping"],"backgroundTag":"invalid-addon-channel-location","analyzedSha":"4c8573c808a73d578c5eadc86d410646ea0b0d73","analyzedAt":"2026-09-05T04:13:19.212Z","contentChangedAt":"2026-09-05T04:13:19.212Z","schemaVersion":2},"datasetVersion":"2026-09-12T07:17:12.445Z"}