1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
# swarm update
<!---MARKER_GEN_START-->
Update the swarm
### Options
| Name | Type | Default | Description |
|:-------------------------|:--------------|:------------|:------------------------------------------------------------|
| `--autolock` | | | Change manager autolocking setting (true\|false) |
| `--cert-expiry` | `duration` | `2160h0m0s` | Validity period for node certificates (ns\|us\|ms\|s\|m\|h) |
| `--dispatcher-heartbeat` | `duration` | `5s` | Dispatcher heartbeat period (ns\|us\|ms\|s\|m\|h) |
| `--external-ca` | `external-ca` | | Specifications of one or more certificate signing endpoints |
| `--max-snapshots` | `uint64` | `0` | Number of additional Raft snapshots to retain |
| `--snapshot-interval` | `uint64` | `10000` | Number of log entries between Raft snapshots |
| `--task-history-limit` | `int64` | `5` | Task history retention limit |
<!---MARKER_GEN_END-->
## Description
Updates a swarm with new parameter values.
> **Note**
>
> This is a cluster management command, and must be executed on a swarm
> manager node. To learn about managers and workers, refer to the
> [Swarm mode section](https://docs.docker.com/engine/swarm/) in the
> documentation.
## Examples
```console
$ docker swarm update --cert-expiry 720h
```
## Related commands
* [swarm ca](swarm_ca.md)
* [swarm init](swarm_init.md)
* [swarm join](swarm_join.md)
* [swarm join-token](swarm_join-token.md)
* [swarm leave](swarm_leave.md)
* [swarm unlock](swarm_unlock.md)
* [swarm unlock-key](swarm_unlock-key.md)
|
