mirror of https://github.com/docker/cli.git
111 lines
3.2 KiB
Go
111 lines
3.2 KiB
Go
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package volume
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import (
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"fmt"
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"golang.org/x/net/context"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/cli/command"
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"github.com/docker/docker/opts"
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runconfigopts "github.com/docker/docker/runconfig/opts"
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"github.com/spf13/cobra"
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)
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type createOptions struct {
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name string
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driver string
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driverOpts opts.MapOpts
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labels []string
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}
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func newCreateCommand(dockerCli *command.DockerCli) *cobra.Command {
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opts := createOptions{
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driverOpts: *opts.NewMapOpts(nil, nil),
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}
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cmd := &cobra.Command{
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Use: "create [OPTIONS] [VOLUME]",
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Short: "Create a volume",
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Long: createDescription,
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Args: cli.RequiresMaxArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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if len(args) == 1 {
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if opts.name != "" {
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fmt.Fprint(dockerCli.Err(), "Conflicting options: either specify --name or provide positional arg, not both\n")
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return cli.StatusError{StatusCode: 1}
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}
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opts.name = args[0]
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}
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return runCreate(dockerCli, opts)
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},
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}
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flags := cmd.Flags()
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flags.StringVarP(&opts.driver, "driver", "d", "local", "Specify volume driver name")
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flags.StringVar(&opts.name, "name", "", "Specify volume name")
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flags.Lookup("name").Hidden = true
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flags.VarP(&opts.driverOpts, "opt", "o", "Set driver specific options")
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flags.StringSliceVar(&opts.labels, "label", []string{}, "Set metadata for a volume")
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return cmd
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}
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func runCreate(dockerCli *command.DockerCli, opts createOptions) error {
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client := dockerCli.Client()
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volReq := types.VolumeCreateRequest{
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Driver: opts.driver,
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DriverOpts: opts.driverOpts.GetAll(),
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Name: opts.name,
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Labels: runconfigopts.ConvertKVStringsToMap(opts.labels),
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}
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vol, err := client.VolumeCreate(context.Background(), volReq)
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if err != nil {
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return err
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}
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fmt.Fprintf(dockerCli.Out(), "%s\n", vol.Name)
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return nil
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}
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var createDescription = `
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Creates a new volume that containers can consume and store data in. If a name
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is not specified, Docker generates a random name. You create a volume and then
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configure the container to use it, for example:
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$ docker volume create hello
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hello
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$ docker run -d -v hello:/world busybox ls /world
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The mount is created inside the container's **/src** directory. Docker doesn't
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not support relative paths for mount points inside the container.
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Multiple containers can use the same volume in the same time period. This is
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useful if two containers need access to shared data. For example, if one
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container writes and the other reads the data.
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## Driver specific options
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Some volume drivers may take options to customize the volume creation. Use the
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**-o** or **--opt** flags to pass driver options:
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$ docker volume create --driver fake --opt tardis=blue --opt timey=wimey
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These options are passed directly to the volume driver. Options for different
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volume drivers may do different things (or nothing at all).
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The built-in **local** driver on Windows does not support any options.
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The built-in **local** driver on Linux accepts options similar to the linux
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**mount** command:
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$ docker volume create --driver local --opt type=tmpfs --opt device=tmpfs --opt o=size=100m,uid=1000
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Another example:
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$ docker volume create --driver local --opt type=btrfs --opt device=/dev/sda2
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`
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