cluster options are incompatible with type bind

Error message

cluster options are incompatible with type bind

What it means

Returned by handleBindToMount (cli/compose/convert/volume.go:135-136). Cluster options are for Swarm cluster volumes; they have no meaning for a host bind mount, so the converter rejects the pairing at cli/compose/convert/volume.go:136. Because ClusterOpts is an empty struct, even `cluster: {}` triggers it.

Solutions

Remove the `cluster:` key from the bind entry.
If a Swarm cluster volume was intended, change `type:` to `cluster`, remove `bind:`/`image:`/`tmpfs:` blocks, and ensure a non-empty source.

Example fix

# before
volumes:
  - type: bind
    source: /host/data
    target: /data
    cluster: {}

# after
volumes:
  - type: bind
    source: /host/data
    target: /data

Defensive patterns

Strategy: validation

Validate before calling

for i, v := range serviceVolumes {
    if v.Type == "bind" && v.Cluster != nil {
        return fmt.Errorf("service volume[%d] target=%q: type bind must not declare a cluster block", i, v.Target)
    }
}

Try / catch

mounts, err := convert.Volumes(serviceVolumes, stackVolumes, namespace)
if err != nil && strings.Contains(err.Error(), "cluster options are incompatible with type bind") {
    return fmt.Errorf("compose config error: %w (remove the cluster: block from the bind entry)", err)
}

Prevention

Cluster volumes are Swarm-only; do not mix cluster blocks with non-cluster types.
Avoid YAML anchors that spread a cluster block across entries of other types.

When it happens

Trigger: ServiceVolumeConfig with Type=="bind" and Cluster!=nil passed to convertVolumeToMount().

Common situations: Migrating a cluster volume to a bind without dropping the `cluster:` key; YAML anchors injecting the field.

Related errors

AI-assisted analysis of docker/cli@4f84911bfe (2026-08-07). Data as JSON: /api/errors/06e19999b58a6f18. Report an issue: GitHub.

Appendix: source

Thrown at cli/compose/convert/volume.go:136

}

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)

	if volume.Source != "" {
		return mount.Mount{}, errors.New("invalid tmpfs source, source must be empty")
	}
	if volume.Bind != nil {
		return mount.Mount{}, errors.New("bind options are incompatible with type tmpfs")
	}

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