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moby--moby/docs/reference/commandline/swarm_update.md
Tonis Tiigi 7d8d51aa9d Add cert-expiry to swarm update
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
2016-06-16 18:06:02 -07:00

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<!--[metadata]>
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title = "swarm update"
description = "The swarm update command description and usage"
keywords = ["swarm, update"]
[menu.main]
parent = "smn_cli"
+++
<![end-metadata]-->
**Warning:** this command is part of the Swarm management feature introduced in Docker 1.12, and might be subject to non backward-compatible changes.
# swarm update
Usage: docker swarm update [OPTIONS]
update the Swarm.
Options:
--auto-accept value Auto acceptance policy (worker, manager or none)
--dispatcher-heartbeat duration Dispatcher heartbeat period (default 5s)
--help Print usage
--secret string Set secret value needed to accept nodes into cluster
--task-history-limit int Task history retention limit (default 10)
--cert-expiry duration Validity period for node certificates (default 2160h0m0s)
Updates a Swarm cluster with new parameter values. This command must target a manager node.
```bash
$ docker swarm update --auto-accept manager
```
## Related information
* [swarm init](swarm_init.md)
* [swarm join](swarm_join.md)
* [swarm leave](swarm_leave.md)