github.com/vincentwoo/docker@v0.7.3-0.20160116130405-82401a4b13c0/man/docker-update.1.md (about)

     1  % DOCKER(1) Docker User Manuals
     2  % Docker Community
     3  % JUNE 2014
     4  # NAME
     5  docker-update - Update resource configs of one or more containers
     6  
     7  # SYNOPSIS
     8  **docker update**
     9  [**--blkio-weight**[=*[BLKIO-WEIGHT]*]]
    10  [**--cpu-shares**[=*0*]]
    11  [**--cpu-period**[=*0*]]
    12  [**--cpu-quota**[=*0*]]
    13  [**--cpuset-cpus**[=*CPUSET-CPUS*]]
    14  [**--cpuset-mems**[=*CPUSET-MEMS*]]
    15  [**--help**]
    16  [**--kernel-memory**[=*KERNEL-MEMORY*]]
    17  [**-m**|**--memory**[=*MEMORY*]]
    18  [**--memory-reservation**[=*MEMORY-RESERVATION*]]
    19  [**--memory-swap**[=*MEMORY-SWAP*]]
    20  CONTAINER [CONTAINER...]
    21  
    22  # DESCRIPTION
    23  
    24  The `docker update` command dynamically updates container resources.  Use this
    25  command to prevent containers from consuming too many resources from their
    26  Docker host.  With a single command, you can place limits on a single
    27  container or on many. To specify more than one container, provide
    28  space-separated list of container names or IDs.
    29  
    30  With the exception of the `--kernel-memory` value, you can specify these
    31  options on a running or a stopped container. You can only update
    32  `--kernel-memory` on a stopped container. When you run `docker update` on
    33  stopped container, the next time you restart it, the container uses those
    34  values.
    35  
    36  # OPTIONS
    37  **--blkio-weight**=0
    38     Block IO weight (relative weight) accepts a weight value between 10 and 1000.
    39  
    40  **--cpu-shares**=0
    41     CPU shares (relative weight)
    42  
    43  **--cpu-period**=0
    44     Limit the CPU CFS (Completely Fair Scheduler) period
    45  
    46  **--cpu-quota**=0
    47     Limit the CPU CFS (Completely Fair Scheduler) quota
    48  
    49  **--cpuset-cpus**=""
    50     CPUs in which to allow execution (0-3, 0,1)
    51  
    52  **--cpuset-mems**=""
    53     Memory nodes(MEMs) in which to allow execution (0-3, 0,1). Only effective on NUMA systems.
    54  
    55  **--help**
    56     Print usage statement
    57  
    58  **--kernel-memory**=""
    59     Kernel memory limit (format: `<number>[<unit>]`, where unit = b, k, m or g)
    60  
    61     Note that you can not update kernel memory to a running container, it can only
    62  be updated to a stopped container, and affect after it's started.
    63  
    64  **-m**, **--memory**=""
    65     Memory limit (format: <number><optional unit>, where unit = b, k, m or g)
    66  
    67  **--memory-reservation**=""
    68     Memory soft limit (format: <number>[<unit>], where unit = b, k, m or g)
    69  
    70  **--memory-swap**=""
    71     Total memory limit (memory + swap)
    72  
    73  # EXAMPLES
    74  
    75  The following sections illustrate ways to use this command.
    76  
    77  ### Update a container with cpu-shares=512
    78  
    79  To limit a container's cpu-shares to 512, first identify the container
    80  name or ID. You can use **docker ps** to find these values. You can also
    81  use the ID returned from the **docker run** command.  Then, do the following:
    82  
    83  ```bash
    84  $ docker update --cpu-shares 512 abebf7571666
    85  ```
    86  
    87  ### Update a container with cpu-shares and memory
    88  
    89  To update multiple resource configurations for multiple containers:
    90  
    91  ```bash
    92  $ docker update --cpu-shares 512 -m 300M abebf7571666 hopeful_morse
    93  ```