mirror of https://github.com/docker/docs.git
78 lines
2.1 KiB
Markdown
78 lines
2.1 KiB
Markdown
---
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redirect_from:
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- /reference/commandline/service_scale/
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description: The service scale command description and usage
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keywords:
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- service, scale
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title: docker service scale
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---
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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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```markdown
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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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```
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## Examples
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### Scale a service
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The scale command enables you to scale one or more services either up or down to the desired number of replicas. The command will return immediatly, but the actual scaling of the service may take some time. To stop all replicas of a service while keeping the service active in the swarm you can set the scale to 0.
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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 ps](service_ps.md)
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* [service update](service_update.md)
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