{"record":{"id":"42baa7fddd4b3984","repo":"kubernetes/kops","slug":"invalid-channel-location-q","errorCode":null,"errorMessage":"invalid channel location: %q","messagePattern":"invalid channel location: %q","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/apis/kops/channel.go","lineNumber":115,"sourceCode":"\tVersion string `json:\"version\"`\n\n\t// KubernetesVersion specifies that this package only applies to a semver range of kubernetes version\n\tKubernetesVersion string `json:\"kubernetesVersion,omitempty\"`\n\n\t// KopsVersion specifies that this package only applies to a semver range of kOps version\n\tKopsVersion string `json:\"kopsVersion,omitempty\"`\n}\n\n// ResolveChannel maps a channel to an absolute URL (possibly a VFS URL)\n// If the channel is the well-known \"none\" value, we return (nil, nil)\nfunc ResolveChannel(location string) (*url.URL, error) {\n\tif location == \"none\" {\n\t\treturn nil, nil\n\t}\n\n\tu, err := url.Parse(location)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"invalid channel location: %q\", location)\n\t}\n\n\tif !u.IsAbs() {\n\t\tbase, err := url.Parse(DefaultChannelBase)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"invalid base channel location: %q\", DefaultChannelBase)\n\t\t}\n\t\tklog.V(4).Infof(\"resolving %q against default channel location %q\", location, DefaultChannelBase)\n\t\tu = base.ResolveReference(u)\n\t}\n\n\treturn u, nil\n}\n\n// LoadChannel loads a Channel object from the specified VFS location\nfunc LoadChannel(vfsContext *vfs.VFSContext, location string) (*Channel, error) {\n\tresolvedURL, err := ResolveChannel(location)\n\tif err != nil {","sourceCodeStart":97,"sourceCodeEnd":133,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/pkg/apis/kops/channel.go#L97-L133","documentation":"ResolveChannel in pkg/apis/kops/channel.go loads a kops channel (addons/Kubernetes update channel) from a location string. The string 'none' is special-cased to a nil channel; otherwise the location is parsed as a URL, and if url.Parse fails, the location is rejected with 'invalid channel location'. Relative locations are later resolved against DefaultChannelBase.","triggerScenarios":"LoadChannel or loadClusterPackage is given a channel location string that is not a parseable URL and is not the literal 'none' — e.g. contains characters illegal in a URL (spaces, unescaped braces, control characters) or a malformed scheme.","commonSituations":"Typo in the cluster spec's channel/addons location (unescaped spaces in a file:// or https:// URL); templated config where a variable expanded to something with special characters; copy-pasted location with trailing whitespace or newline; confusion between 'none' and other disable markers like 'disabled'.","solutions":["Fix the channel location in the cluster spec/addons so it is a valid absolute URL (https:// or file://) or the literal string 'none' to disable.","URL-encode special characters (spaces, braces) or remove them: e.g. 'https://example.com/my channel.yaml' → 'https://example.com/my%20channel.yaml'.","Trim stray whitespace/newlines around the location value (inspect with `kops get cluster -o yaml`).","Omit relative-path confusion: use the default base implicitly by giving a bare filename only if intended, or provide a full https URL."],"exampleFix":"// before: invalid URL (unencoded space)\nchannel: https://example.com/channels/my channel.yaml\n// after\ncurrentChannel: https://example.com/channels/my-channel.yaml","handlingStrategy":"validation","validationCode":"u, err := url.Parse(location)\nif err != nil {\n\treturn fmt.Errorf(\"channel location %q is not a valid URL: %v\", location, err)\n}\nif location != \"none\" && u.Host == \"\" && u.Scheme == \"\" {\n\t// will be resolved against DefaultChannelBase; ensure it is a clean relative path\n}","typeGuard":"func isValidChannelLocation(loc string) bool {\n\tif loc == \"none\" {\n\t\treturn true\n\t}\n\t_, err := url.Parse(loc)\n\treturn err == nil && loc != \"\"\n}","tryCatchPattern":"channel, err := channel.ResolveChannel(location, nil)\nif err != nil {\n\tif strings.Contains(err.Error(), \"invalid channel location\") {\n\t\treturn fmt.Errorf(\"check 'channel' value in cluster spec: %q must be a valid URL or 'none' (%v)\", location, err)\n\t}\n\treturn err\n}","preventionTips":["Always use https:// URLs or the literal 'none' for channel locations","URL-encode spaces and special characters in channel file names","Trim whitespace/newlines from templated config values before writing the cluster spec","Validate the cluster spec with `kops toolbox template`/`kops get -o yaml` before applying"],"tags":["channel","url-parsing","configuration"],"backgroundTag":"invalid-url-location","analyzedSha":"4c8573c808a73d578c5eadc86d410646ea0b0d73","analyzedAt":"2026-09-05T04:13:19.212Z","contentChangedAt":"2026-09-05T04:13:19.212Z","schemaVersion":2},"datasetVersion":"2026-09-12T12:17:11.808Z"}