moby--moby/docs/reference/commandline/node_update.md

---
title: "node update"
description: "The node update command description and usage"
keywords: "resources, update, dynamically"
---

<!-- This file is maintained within the docker/docker Github
     repository at https://github.com/docker/docker/. Make all
     pull requests against that repo. If you see this file in
     another repository, consider it read-only there, as it will
     periodically be overwritten by the definitive file. Pull
     requests which include edits to this file in other repositories
     will be rejected.
-->

## update

```markdown
Usage:  docker node update [OPTIONS] NODE

Update a node

Options:
      --availability string   Availability of the node (active/pause/drain)
      --help                  Print usage
      --label-add value       Add or update a node label (key=value) (default [])
      --label-rm value        Remove a node label if exists (default [])
      --role string           Role of the node (worker/manager)
```

### Add label metadata to a node

Add metadata to a swarm node using node labels. You can specify a node label as
a key with an empty value:

``` bash
$ docker node update --label-add foo worker1
```

To add multiple labels to a node, pass the `--label-add` flag for each label:

``` bash
$ docker node update --label-add foo --label-add bar worker1
```

When you [create a service](service_create.md),
you can use node labels as a constraint. A constraint limits the nodes where the
scheduler deploys tasks for a service.

For example, to add a `type` label to identify nodes where the scheduler should
deploy message queue service tasks:

``` bash
$ docker node update --label-add type=queue worker1
```

The labels you set for nodes using `docker node update` apply only to the node
entity within the swarm. Do not confuse them with the docker daemon labels for
[dockerd](https://docs.docker.com/engine/userguide/labels-custom-metadata/#daemon-labels).

For more information about labels, refer to [apply custom
metadata](https://docs.docker.com/engine/userguide/labels-custom-metadata/).

## Related information

* [node demote](node_demote.md)
* [node inspect](node_inspect.md)
* [node ls](node_ls.md)
* [node promote](node_promote.md)
* [node ps](node_ps.md)
* [node rm](node_rm.md)