runc-update (8) - Linux Manuals

runc-update: update running container resource constraints

NAME

runc-update - update running container resource constraints

SYNOPSIS

runc update [option ...] container-id

runc update -r resources.json|- container-id

DESCRIPTION

The update command change the resource constraints of a running container instance.

The resources can be set using options, or, if -r is used, parsed from JSON provided as a file or from stdin.

In case -r is used, the JSON format is like this:

{
        "memory": {
                "limit": 0,
                        "reservation": 0,
                        "swap": 0,
                        "kernel": 0,
                        "kernelTCP": 0
        },
                "cpu": {
                        "shares": 0,
                        "quota": 0,
                        "period": 0,
                        "realtimeRuntime": 0,
                        "realtimePeriod": 0,
                        "cpus": "",
                        "mems": ""
                },
                "blockIO": {
                        "blkioWeight": 0
                }
}

OPTIONS

--resources|-r resources.json

Read the new resource limtis from resources.json. Use - to read from stdin. If this option is used, all other options are ignored.

--blkio-weight weight

Set a new io weight.

--cpu-period num

Set CPU CFS period to be used for hardcapping (in microseconds)

--cpu-quota num

Set CPU usage limit within a given period (in microseconds).

--cpu-rt-period num

Set CPU realtime period to be used for hardcapping (in microseconds).

--cpu-rt-runtime num

Set CPU realtime hardcap limit (in usecs). Allowed cpu time in a given period.

--cpu-share num

Set CPU shares (relative weight vs. other containers).

--cpuset-cpus list

Set CPU(s) to use. The list can contain commas and ranges. For example: 0-3,7.

--cpuset-mems list

Set memory node(s) to use. The list format is the same as for --cpuset-cpus.

--memory num

Set memory limit to num bytes.

--memory-reservation num

Set memory reservation, or soft limit, to num bytes.

--memory-swap num

Set total memory + swap usage to num bytes. Use -1 to unset the limit (i.e. use unlimited swap).

--pids-limit num

Set the maximum number of processes allowed in the container.

--l3-cache-schema value

Set the value for Intel RDT/CAT L3 cache schema.

--mem-bw-schema value

Set the Intel RDT/MBA memory bandwidth schema.