2f736927a0
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>
(cherry picked from commit 0aa4e1e689)
2 KiB
Warning: this command is part of the Swarm management feature introduced in Docker 1.12, and might be subject to non backward-compatible changes.
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.
$ 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 therefore 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