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0aa4e1e689
Rather than conflict with the unexposed task model, change the names of the object-oriented task display to `docker <object> ps`. The command works identically to `docker service tasks`. This change is superficial. This provides a more sensical docker experience while not trampling on the task model that may be introduced as a top-level command at a later date. The following is an example of the display using `docker service ps` with a service named `condescending_cori`: ``` $ docker service ps condescending_cori ID NAME SERVICE IMAGE LAST STATE DESIRED STATE NODE e2cd9vqb62qjk38lw65uoffd2 condescending_cori.1 condescending_cori alpine Running 13 minutes ago Running 6c6d232a5d0e ``` The following shows the output for the node on which the command is running: ```console $ docker node ps self ID NAME SERVICE IMAGE LAST STATE DESIRED STATE NODE b1tpbi43k1ibevg2e94bmqo0s mad_kalam.1 mad_kalam apline Accepted 2 seconds ago Accepted 6c6d232a5d0e e2cd9vqb62qjk38lw65uoffd2 condescending_cori.1 condescending_cori alpine Running 12 minutes ago Running 6c6d232a5d0e 4x609m5o0qyn0kgpzvf0ad8x5 furious_davinci.1 furious_davinci redis Running 32 minutes ago Running 6c6d232a5d0e ``` Signed-off-by: Stephen J Day <stephen.day@docker.com>
78 lines
1.9 KiB
Markdown
78 lines
1.9 KiB
Markdown
<!--[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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# service scale
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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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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 ps](service_ps.md)
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* [service update](service_update.md)
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