github.com/khulnasoft/cli@v0.0.0-20240402070845-01bcad7beefa/docs/reference/commandline/service_scale.md (about)

     1  # service scale
     2  
     3  <!---MARKER_GEN_START-->
     4  Scale one or multiple replicated services
     5  
     6  ### Options
     7  
     8  | Name             | Type | Default | Description                                                     |
     9  |:-----------------|:-----|:--------|:----------------------------------------------------------------|
    10  | `-d`, `--detach` |      |         | Exit immediately instead of waiting for the service to converge |
    11  
    12  
    13  <!---MARKER_GEN_END-->
    14  
    15  ## Description
    16  
    17  The scale command enables you to scale one or more replicated services either up
    18  or down to the desired number of replicas. This command cannot be applied on
    19  services which are global mode. The command will return immediately, but the
    20  actual scaling of the service may take some time. To stop all replicas of a
    21  service while keeping the service active in the swarm you can set the scale to 0.
    22  
    23  > **Note**
    24  >
    25  > This is a cluster management command, and must be executed on a swarm
    26  > manager node. To learn about managers and workers, refer to the
    27  > [Swarm mode section](https://docs.docker.com/engine/swarm/) in the
    28  > documentation.
    29  
    30  ## Examples
    31  
    32  ### Scale a single service
    33  
    34  The following command scales the "frontend" service to 50 tasks.
    35  
    36  ```console
    37  $ docker service scale frontend=50
    38  
    39  frontend scaled to 50
    40  ```
    41  
    42  The following command tries to scale a global service to 10 tasks and returns an error.
    43  
    44  ```console
    45  $ docker service create --mode global --name backend backend:latest
    46  
    47  b4g08uwuairexjub6ome6usqh
    48  
    49  $ docker service scale backend=10
    50  
    51  backend: scale can only be used with replicated or replicated-job mode
    52  ```
    53  
    54  Directly afterwards, run `docker service ls`, to see the actual number of
    55  replicas.
    56  
    57  ```console
    58  $ docker service ls --filter name=frontend
    59  
    60  ID            NAME      MODE        REPLICAS  IMAGE
    61  3pr5mlvu3fh9  frontend  replicated  15/50     nginx:alpine
    62  ```
    63  
    64  You can also scale a service using the [`docker service update`](service_update.md)
    65  command. The following commands are equivalent:
    66  
    67  ```console
    68  $ docker service scale frontend=50
    69  $ docker service update --replicas=50 frontend
    70  ```
    71  
    72  ### Scale multiple services
    73  
    74  The `docker service scale` command allows you to set the desired number of
    75  tasks for multiple services at once. The following example scales both the
    76  backend and frontend services:
    77  
    78  ```console
    79  $ docker service scale backend=3 frontend=5
    80  
    81  backend scaled to 3
    82  frontend scaled to 5
    83  
    84  $ docker service ls
    85  
    86  ID            NAME      MODE        REPLICAS  IMAGE
    87  3pr5mlvu3fh9  frontend  replicated  5/5       nginx:alpine
    88  74nzcxxjv6fq  backend   replicated  3/3       redis:3.0.6
    89  ```
    90  
    91  ## Related commands
    92  
    93  * [service create](service_create.md)
    94  * [service inspect](service_inspect.md)
    95  * [service logs](service_logs.md)
    96  * [service ls](service_ls.md)
    97  * [service rm](service_rm.md)
    98  * [service rollback](service_rollback.md)
    99  * [service ps](service_ps.md)
   100  * [service update](service_update.md)