c4af30652d
It's used for updating properties of one or more containers, we only support resource configs for now. It can be extended in the future. Signed-off-by: Qiang Huang <h.huangqiang@huawei.com> Upstream-commit: 8799c4fc0feadede6ae60e77bd7d9dfd7cc72a79 Component: engine
105 lines
3.1 KiB
Go
105 lines
3.1 KiB
Go
package client
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import (
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"fmt"
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"github.com/docker/docker/api/types/container"
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Cli "github.com/docker/docker/cli"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/go-units"
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)
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// CmdUpdate updates resources of one or more containers.
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//
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// Usage: docker update [OPTIONS] CONTAINER [CONTAINER...]
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func (cli *DockerCli) CmdUpdate(args ...string) error {
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cmd := Cli.Subcmd("update", []string{"CONTAINER [CONTAINER...]"}, Cli.DockerCommands["update"].Description, true)
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flBlkioWeight := cmd.Uint16([]string{"-blkio-weight"}, 0, "Block IO (relative weight), between 10 and 1000")
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flCPUPeriod := cmd.Int64([]string{"-cpu-period"}, 0, "Limit CPU CFS (Completely Fair Scheduler) period")
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flCPUQuota := cmd.Int64([]string{"-cpu-quota"}, 0, "Limit CPU CFS (Completely Fair Scheduler) quota")
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flCpusetCpus := cmd.String([]string{"-cpuset-cpus"}, "", "CPUs in which to allow execution (0-3, 0,1)")
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flCpusetMems := cmd.String([]string{"-cpuset-mems"}, "", "MEMs in which to allow execution (0-3, 0,1)")
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flCPUShares := cmd.Int64([]string{"#c", "-cpu-shares"}, 0, "CPU shares (relative weight)")
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flMemoryString := cmd.String([]string{"m", "-memory"}, "", "Memory limit")
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flMemoryReservation := cmd.String([]string{"-memory-reservation"}, "", "Memory soft limit")
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flMemorySwap := cmd.String([]string{"-memory-swap"}, "", "Total memory (memory + swap), '-1' to disable swap")
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flKernelMemory := cmd.String([]string{"-kernel-memory"}, "", "Kernel memory limit")
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cmd.Require(flag.Min, 1)
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cmd.ParseFlags(args, true)
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if cmd.NFlag() == 0 {
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return fmt.Errorf("You must provide one or more flags when using this command.")
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}
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var err error
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var flMemory int64
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if *flMemoryString != "" {
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flMemory, err = units.RAMInBytes(*flMemoryString)
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if err != nil {
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return err
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}
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}
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var memoryReservation int64
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if *flMemoryReservation != "" {
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memoryReservation, err = units.RAMInBytes(*flMemoryReservation)
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if err != nil {
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return err
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}
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}
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var memorySwap int64
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if *flMemorySwap != "" {
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if *flMemorySwap == "-1" {
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memorySwap = -1
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} else {
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memorySwap, err = units.RAMInBytes(*flMemorySwap)
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if err != nil {
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return err
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}
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}
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}
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var kernelMemory int64
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if *flKernelMemory != "" {
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kernelMemory, err = units.RAMInBytes(*flKernelMemory)
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if err != nil {
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return err
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}
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}
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resources := container.Resources{
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BlkioWeight: *flBlkioWeight,
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CpusetCpus: *flCpusetCpus,
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CpusetMems: *flCpusetMems,
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CPUShares: *flCPUShares,
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Memory: flMemory,
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MemoryReservation: memoryReservation,
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MemorySwap: memorySwap,
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KernelMemory: kernelMemory,
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CPUPeriod: *flCPUPeriod,
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CPUQuota: *flCPUQuota,
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}
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hostConfig := container.HostConfig{
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Resources: resources,
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}
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names := cmd.Args()
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var errNames []string
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for _, name := range names {
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if err := cli.client.ContainerUpdate(name, hostConfig); err != nil {
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fmt.Fprintf(cli.err, "%s\n", err)
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errNames = append(errNames, name)
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} else {
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fmt.Fprintf(cli.out, "%s\n", name)
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}
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}
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if len(errNames) > 0 {
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return fmt.Errorf("Error: failed to update resources of containers: %v", errNames)
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}
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return nil
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}
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