image options are incompatible with type bind

Error message

image options are incompatible with type bind

What it means

Raised by handleBindToMount when a mount of type 'bind' also includes an 'image:' options block. Image options (subpath into a mounted image) apply only to type: image mounts, so the converter fails fast on the incompatible pairing.

Source

Thrown at cli/compose/convert/volume.go:130

	if volume.Image != nil {
		result.ImageOptions = &mount.ImageOptions{
			Subpath: volume.Image.Subpath,
		}
	}
	return result, nil
}

func handleBindToMount(volume composetypes.ServiceVolumeConfig) (mount.Mount, error) {
	result := createMountFromVolume(volume)

	if volume.Source == "" {
		return mount.Mount{}, errors.New("invalid bind source, source cannot be empty")
	}
	if volume.Volume != nil {
		return mount.Mount{}, errors.New("volume options are incompatible with type bind")
	}
	if volume.Image != nil {
		return mount.Mount{}, errors.New("image options are incompatible with type bind")
	}
	if volume.Tmpfs != nil {
		return mount.Mount{}, errors.New("tmpfs options are incompatible with type bind")
	}
	if volume.Cluster != nil {
		return mount.Mount{}, errors.New("cluster options are incompatible with type bind")
	}
	if volume.Bind != nil {
		result.BindOptions = &mount.BindOptions{
			Propagation: mount.Propagation(volume.Bind.Propagation),
		}
	}
	return result, nil
}

func handleTmpfsToMount(volume composetypes.ServiceVolumeConfig) (mount.Mount, error) {
	result := createMountFromVolume(volume)

View on GitHub (pinned to e9452d6e78)

Solutions

Remove the 'image:' block from the bind entry; to mount a subdirectory of the host, put it directly in the source path.
If mounting an image's filesystem was intended, change type to image and make source an image reference.

Example fix

# before
volumes:
  - type: bind
    source: /srv/data
    target: /data
    image:
      subpath: etc
# after
volumes:
  - type: bind
    source: /srv/data
    target: /data

When it happens

Trigger: 'docker stack deploy' with a service volume entry combining type: bind and an image: sub-mapping such as image: {subpath: etc}.

Common situations: Converting an image mount to a host bind mount and leaving the image: block behind; tooling that emits every option block regardless of mount type.

Related errors

AI-assisted analysis of docker/cli@e9452d6e78 (2026-08-01). Data as JSON: /data/errors/40fe6fb457d40177.json. Report an issue: GitHub.