mirror of https://github.com/docker/cli.git
74 lines
2.7 KiB
Markdown
74 lines
2.7 KiB
Markdown
<!--[metadata]>
|
|
+++
|
|
title = "update"
|
|
description = "The update command description and usage"
|
|
keywords = ["resources, update, dynamically"]
|
|
[menu.main]
|
|
parent = "smn_cli"
|
|
+++
|
|
<![end-metadata]-->
|
|
|
|
## update
|
|
|
|
Usage: docker update [OPTIONS] CONTAINER [CONTAINER...]
|
|
|
|
Update configuration of one or more containers
|
|
|
|
--help=false Print usage
|
|
--blkio-weight=0 Block IO (relative weight), between 10 and 1000
|
|
--cpu-shares=0 CPU shares (relative weight)
|
|
--cpu-period=0 Limit the CPU CFS (Completely Fair Scheduler) period
|
|
--cpu-quota=0 Limit the CPU CFS (Completely Fair Scheduler) quota
|
|
--cpuset-cpus="" CPUs in which to allow execution (0-3, 0,1)
|
|
--cpuset-mems="" Memory nodes (MEMs) in which to allow execution (0-3, 0,1)
|
|
-m, --memory="" Memory limit
|
|
--memory-reservation="" Memory soft limit
|
|
--memory-swap="" A positive integer equal to memory plus swap. Specify -1 to enable unlimited swap
|
|
--kernel-memory="" Kernel memory limit: container must be stopped
|
|
--restart Restart policy to apply when a container exits
|
|
|
|
The `docker update` command dynamically updates container configuration.
|
|
You can use this command to prevent containers from consuming too many resources
|
|
from their Docker host. With a single command, you can place limits on
|
|
a single container or on many. To specify more than one container, provide
|
|
space-separated list of container names or IDs.
|
|
|
|
With the exception of the `--kernel-memory` value, you can specify these
|
|
options on a running or a stopped container. You can only update
|
|
`--kernel-memory` on a stopped container. When you run `docker update` on
|
|
stopped container, the next time you restart it, the container uses those
|
|
values.
|
|
|
|
Another configuration you can change with this command is restart policy,
|
|
new restart policy will take effect instantly after you run `docker update`
|
|
on a container.
|
|
|
|
## EXAMPLES
|
|
|
|
The following sections illustrate ways to use this command.
|
|
|
|
### Update a container with cpu-shares=512
|
|
|
|
To limit a container's cpu-shares to 512, first identify the container
|
|
name or ID. You can use **docker ps** to find these values. You can also
|
|
use the ID returned from the **docker run** command. Then, do the following:
|
|
|
|
```bash
|
|
$ docker update --cpu-shares 512 abebf7571666
|
|
```
|
|
|
|
### Update a container with cpu-shares and memory
|
|
|
|
To update multiple resource configurations for multiple containers:
|
|
|
|
```bash
|
|
$ docker update --cpu-shares 512 -m 300M abebf7571666 hopeful_morse
|
|
```
|
|
|
|
### Update a container's restart policy
|
|
|
|
To update restart policy for one or more containers:
|
|
```bash
|
|
$ docker update --restart=on-failure:3 abebf7571666 hopeful_morse
|
|
```
|