2.3 KiB
update
Usage: docker update [OPTIONS] CONTAINER [CONTAINER...]
Updates container resource limits
--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
The docker update command dynamically updates container resources. 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.
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:
$ docker update --cpu-shares 512 abebf7571666
Update a container with cpu-shares and memory
To update multiple resource configurations for multiple containers:
$ docker update --cpu-shares 512 -m 300M abebf7571666 hopeful_morse