docker/cli · error

copying config.json into container failed: %w

Error message

copying config.json into container failed: %w

What it means

Error "copying config.json into container failed: %w" thrown in docker/cli.

Source

Thrown at cli/command/container/create.go:432

		Size: int64(configBuf.Len()),
		Mode: 0o600,
	})

	if _, err := io.Copy(tarWriter, &configBuf); err != nil {
		_ = tarWriter.Close()
		return fmt.Errorf("writing config to tar file for config copy: %w", err)
	}

	if err := tarWriter.Close(); err != nil {
		return fmt.Errorf("closing tar for config copy failed: %w", err)
	}

	_, err := apiClient.CopyToContainer(ctx, containerID, client.CopyToContainerOptions{
		DestinationPath: "/",
		Content:         &tarBuf,
	})
	if err != nil {
		return fmt.Errorf("copying config.json into container failed: %w", err)
	}

	return nil
}

View on GitHub (pinned to e9452d6e78)

When it happens

Trigger: Thrown at cli/command/container/create.go:432 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of docker/cli@e9452d6e78 (2026-08-01). Data as JSON: /data/errors/c952a3e30a31ca9e.json. Report an issue: GitHub.