kubernetes/kops · error

error opening source resource for file %q: %v

Error message

error opening source resource for file %q: %v

What it means

Thrown by writeFileContents when src.Open() fails on the Resource supplying the file's contents. The resource could not produce a reader — e.g. a remote URL that cannot be fetched, a missing source file, or an embedded resource that failed to load. The destination path is only context; the failure is on the source side.

Source

Thrown at upup/pkg/fi/files.go:61

	_, err = EnsureFileMode(destPath, fileMode)
	if err != nil {
		return err
	}

	_, err = EnsureFileOwner(destPath, owner, group)
	if err != nil {
		return err
	}

	return nil
}

func writeFileContents(destPath string, src Resource, fileMode os.FileMode) error {
	klog.Infof("Writing file %q", destPath)

	in, err := src.Open()
	if err != nil {
		return fmt.Errorf("error opening source resource for file %q: %v", destPath, err)
	}
	defer SafeClose(in)

	dir := filepath.Dir(destPath)

	tempFile, err := os.CreateTemp(dir, ".writefile")
	if err != nil {
		return fmt.Errorf("error creating temp file in %q: %w", dir, err)
	}

	closeTempFile := true
	deleteTempFile := true
	defer func() {
		if closeTempFile {
			if err := tempFile.Close(); err != nil {
				klog.Warningf("error closing tempfile %q: %v", tempFile.Name(), err)
			}
		}

View on GitHub (pinned to 4c8573c808)

Solutions

1. Inspect the underlying resource error: for URL resources check network/HTTP status, for file resources check existence and permissions
2. Ensure any secrets or generated resources this file depends on were created earlier in the task graph
3. Fix or replace the source resource definition that yields the contents

When it happens

Trigger: Thrown at upup/pkg/fi/files.go:61 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of kubernetes/kops@4c8573c808 (2026-09-05). Data as JSON: /api/errors/ccc62e91f368ef32. Report an issue: GitHub.