2.3 KiB
| title | description | keywords | |
|---|---|---|---|
| service scale | The service scale command description and usage |
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service scale
Usage: docker service scale SERVICE=REPLICAS [SERVICE=REPLICAS...]
Scale one or multiple services
Options:
--help Print usage
Examples
Scale a service
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 immediately, 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.
For example, the following command scales the "frontend" service to 50 tasks.
$ docker service scale frontend=50
frontend scaled to 50
Directly afterwards, run docker service ls, to see the actual number of
replicas.
$ 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
command. The following commands are equivalent:
$ 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:
$ 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