mirror of https://github.com/docker/cli.git
79 lines
1.9 KiB
Markdown
79 lines
1.9 KiB
Markdown
<!--[metadata]>
|
|
+++
|
|
title = "service scale"
|
|
description = "The service scale command description and usage"
|
|
keywords = ["service, scale"]
|
|
advisory = "rc"
|
|
[menu.main]
|
|
parent = "smn_cli"
|
|
+++
|
|
<![end-metadata]-->
|
|
|
|
# service scale
|
|
|
|
Usage: docker service scale SERVICE=REPLICAS [SERVICE=REPLICAS...]
|
|
|
|
Scale one or multiple services
|
|
|
|
Options:
|
|
--help Print usage
|
|
|
|
|
|
## Examples
|
|
|
|
### Scale a service
|
|
|
|
If you scale a service, you set the *desired* number of replicas. Even though
|
|
the command returns directly, actual scaling of the service may take some time.
|
|
|
|
For example, the following command scales the "frontend" service to 50 tasks.
|
|
|
|
```bash
|
|
$ docker service scale frontend=50
|
|
frontend scaled to 50
|
|
```
|
|
|
|
Directly afterwards, run `docker service ls`, to see the actual number of
|
|
replicas
|
|
|
|
```bash
|
|
$ docker service ls --filter name=frontend
|
|
|
|
ID NAME REPLICAS IMAGE COMMAND
|
|
3pr5mlvu3fh9 frontend 15/50 nginx:alpine
|
|
```
|
|
|
|
You can also scale a service using the [`docker service update`](service_update.md)
|
|
command. The following commands are therefore equivalent:
|
|
|
|
```bash
|
|
$ docker service scale frontend=50
|
|
$ docker service update --replicas=50 frontend
|
|
```
|
|
|
|
### Scale multiple services
|
|
|
|
The `docker service scale` command allows you to set the desired number of
|
|
tasks for multiple services at once. The following example scales both the
|
|
backend and frontend services:
|
|
|
|
```bash
|
|
$ docker service scale backend=3 frontend=5
|
|
backend scaled to 3
|
|
frontend scaled to 5
|
|
|
|
$ docker service ls
|
|
ID NAME REPLICAS IMAGE COMMAND
|
|
3pr5mlvu3fh9 frontend 5/5 nginx:alpine
|
|
74nzcxxjv6fq backend 3/3 redis:3.0.6
|
|
```
|
|
|
|
## Related information
|
|
|
|
* [service create](service_create.md)
|
|
* [service inspect](service_inspect.md)
|
|
* [service ls](service_ls.md)
|
|
* [service rm](service_rm.md)
|
|
* [service tasks](service_tasks.md)
|
|
* [service update](service_update.md)
|