/
update.go
149 lines (131 loc) · 5.18 KB
/
update.go
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package container
import (
"context"
"fmt"
"strings"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/completion"
"github.com/docker/cli/opts"
containertypes "github.com/docker/docker/api/types/container"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
type updateOptions struct {
blkioWeight uint16
cpuPeriod int64
cpuQuota int64
cpuRealtimePeriod int64
cpuRealtimeRuntime int64
cpusetCpus string
cpusetMems string
cpuShares int64
memory opts.MemBytes
memoryReservation opts.MemBytes
memorySwap opts.MemSwapBytes
kernelMemory opts.MemBytes
restartPolicy string
pidsLimit int64
cpus opts.NanoCPUs
nFlag int
containers []string
}
// NewUpdateCommand creates a new cobra.Command for `docker update`
func NewUpdateCommand(dockerCli command.Cli) *cobra.Command {
var options updateOptions
cmd := &cobra.Command{
Use: "update [OPTIONS] CONTAINER [CONTAINER...]",
Short: "Update configuration of one or more containers",
Args: cli.RequiresMinArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
options.containers = args
options.nFlag = cmd.Flags().NFlag()
return runUpdate(cmd.Context(), dockerCli, &options)
},
Annotations: map[string]string{
"aliases": "docker container update, docker update",
},
ValidArgsFunction: completion.ContainerNames(dockerCli, true),
}
flags := cmd.Flags()
flags.Uint16Var(&options.blkioWeight, "blkio-weight", 0, `Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0)`)
flags.Int64Var(&options.cpuPeriod, "cpu-period", 0, "Limit CPU CFS (Completely Fair Scheduler) period")
flags.Int64Var(&options.cpuQuota, "cpu-quota", 0, "Limit CPU CFS (Completely Fair Scheduler) quota")
flags.Int64Var(&options.cpuRealtimePeriod, "cpu-rt-period", 0, "Limit the CPU real-time period in microseconds")
flags.SetAnnotation("cpu-rt-period", "version", []string{"1.25"})
flags.Int64Var(&options.cpuRealtimeRuntime, "cpu-rt-runtime", 0, "Limit the CPU real-time runtime in microseconds")
flags.SetAnnotation("cpu-rt-runtime", "version", []string{"1.25"})
flags.StringVar(&options.cpusetCpus, "cpuset-cpus", "", "CPUs in which to allow execution (0-3, 0,1)")
flags.StringVar(&options.cpusetMems, "cpuset-mems", "", "MEMs in which to allow execution (0-3, 0,1)")
flags.Int64VarP(&options.cpuShares, "cpu-shares", "c", 0, "CPU shares (relative weight)")
flags.VarP(&options.memory, "memory", "m", "Memory limit")
flags.Var(&options.memoryReservation, "memory-reservation", "Memory soft limit")
flags.Var(&options.memorySwap, "memory-swap", `Swap limit equal to memory plus swap: -1 to enable unlimited swap`)
flags.Var(&options.kernelMemory, "kernel-memory", "Kernel memory limit (deprecated)")
// --kernel-memory is deprecated on API v1.42 and up, but our current annotations
// do not support only showing on < API-version. This option is no longer supported
// by runc, so hiding it unconditionally.
flags.SetAnnotation("kernel-memory", "deprecated", nil)
flags.MarkHidden("kernel-memory")
flags.StringVar(&options.restartPolicy, "restart", "", "Restart policy to apply when a container exits")
flags.Int64Var(&options.pidsLimit, "pids-limit", 0, `Tune container pids limit (set -1 for unlimited)`)
flags.SetAnnotation("pids-limit", "version", []string{"1.40"})
flags.Var(&options.cpus, "cpus", "Number of CPUs")
flags.SetAnnotation("cpus", "version", []string{"1.29"})
return cmd
}
func runUpdate(ctx context.Context, dockerCli command.Cli, options *updateOptions) error {
var err error
if options.nFlag == 0 {
return errors.New("you must provide one or more flags when using this command")
}
var restartPolicy containertypes.RestartPolicy
if options.restartPolicy != "" {
restartPolicy, err = opts.ParseRestartPolicy(options.restartPolicy)
if err != nil {
return err
}
}
resources := containertypes.Resources{
BlkioWeight: options.blkioWeight,
CpusetCpus: options.cpusetCpus,
CpusetMems: options.cpusetMems,
CPUShares: options.cpuShares,
Memory: options.memory.Value(),
MemoryReservation: options.memoryReservation.Value(),
MemorySwap: options.memorySwap.Value(),
KernelMemory: options.kernelMemory.Value(),
CPUPeriod: options.cpuPeriod,
CPUQuota: options.cpuQuota,
CPURealtimePeriod: options.cpuRealtimePeriod,
CPURealtimeRuntime: options.cpuRealtimeRuntime,
NanoCPUs: options.cpus.Value(),
}
if options.pidsLimit != 0 {
resources.PidsLimit = &options.pidsLimit
}
updateConfig := containertypes.UpdateConfig{
Resources: resources,
RestartPolicy: restartPolicy,
}
var (
warns []string
errs []string
)
for _, container := range options.containers {
r, err := dockerCli.Client().ContainerUpdate(ctx, container, updateConfig)
if err != nil {
errs = append(errs, err.Error())
} else {
fmt.Fprintln(dockerCli.Out(), container)
}
warns = append(warns, r.Warnings...)
}
if len(warns) > 0 {
fmt.Fprintln(dockerCli.Out(), strings.Join(warns, "\n"))
}
if len(errs) > 0 {
return errors.New(strings.Join(errs, "\n"))
}
return nil
}