mirror of https://github.com/docker/cli.git
80 lines
2.0 KiB
Markdown
80 lines
2.0 KiB
Markdown
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<!--[metadata]>
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+++
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title = "service scale"
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description = "The service scale command description and usage"
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keywords = ["service, scale"]
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[menu.main]
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parent = "smn_cli"
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+++
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<![end-metadata]-->
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**Warning:** this command is part of the Swarm management feature introduced in Docker 1.12, and might be subject to non backward-compatible changes.
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# service scale
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Usage: docker service scale SERVICE=REPLICAS [SERVICE=REPLICAS...]
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Scale one or multiple services
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Options:
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--help Print usage
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## Examples
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### Scale a service
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If you scale a service, you set the *desired* number of replicas. Even though
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the command returns directly, actual scaling of the service may take some time.
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For example, the following command scales the "frontend" service to 50 tasks.
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```bash
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$ docker service scale frontend=50
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frontend scaled to 50
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```
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Directly afterwards, run `docker service ls`, to see the actual number of
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replicas
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```bash
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$ docker service ls --filter name=frontend
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ID NAME REPLICAS IMAGE COMMAND
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3pr5mlvu3fh9 frontend 15/50 nginx:alpine
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```
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You can also scale a service using the [`docker service update`](service_update.md)
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command. The following commands are therefore equivalent:
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```bash
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$ docker service scale frontend=50
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$ docker service update --replicas=50 frontend
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```
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### Scale multiple services
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The `docker service scale` command allows you to set the desired number of
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tasks for multiple services at once. The following example scales both the
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backend and frontend services:
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```bash
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$ docker service scale backend=3 frontend=5
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backend scaled to 3
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frontend scaled to 5
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$ docker service ls
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ID NAME REPLICAS IMAGE COMMAND
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3pr5mlvu3fh9 frontend 5/5 nginx:alpine
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74nzcxxjv6fq backend 3/3 redis:3.0.6
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```
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## Related information
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* [service create](service_create.md)
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* [service inspect](service_inspect.md)
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* [service ls](service_ls.md)
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* [service rm](service_rm.md)
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* [service tasks](service_tasks.md)
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* [service update](service_update.md)
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