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namespaces.go
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/
namespaces.go
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package namespaces
import (
"fmt"
"os"
"sort"
"strings"
"text/tabwriter"
"github.com/containerd/containerd/cmd/ctr/commands"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/log"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
// Command is the cli command for managing namespaces
var Command = cli.Command{
Name: "namespaces",
Aliases: []string{"namespace"},
Usage: "manage namespaces",
Subcommands: cli.Commands{
createCommand,
listCommand,
removeCommand,
setLabelsCommand,
},
}
var createCommand = cli.Command{
Name: "create",
Usage: "create a new namespace",
ArgsUsage: "<name> [<key>=<value]",
Description: "create a new namespace. it must be unique",
Action: func(context *cli.Context) error {
namespace, labels := commands.ObjectWithLabelArgs(context)
if namespace == "" {
return errors.New("please specify a namespace")
}
client, ctx, cancel, err := commands.NewClient(context)
if err != nil {
return err
}
defer cancel()
namespaces := client.NamespaceService()
return namespaces.Create(ctx, namespace, labels)
},
}
var setLabelsCommand = cli.Command{
Name: "label",
Usage: "set and clear labels for a namespace",
ArgsUsage: "<name> [<key>=<value>, ...]",
Description: "set and clear labels for a namespace",
Action: func(context *cli.Context) error {
namespace, labels := commands.ObjectWithLabelArgs(context)
if namespace == "" {
return errors.New("please specify a namespace")
}
client, ctx, cancel, err := commands.NewClient(context)
if err != nil {
return err
}
defer cancel()
namespaces := client.NamespaceService()
for k, v := range labels {
if err := namespaces.SetLabel(ctx, namespace, k, v); err != nil {
return err
}
}
return nil
},
}
var listCommand = cli.Command{
Name: "list",
Aliases: []string{"ls"},
Usage: "list namespaces",
ArgsUsage: "[flags]",
Description: "list namespaces",
Flags: []cli.Flag{
cli.BoolFlag{
Name: "quiet, q",
Usage: "print only the namespace name",
},
},
Action: func(context *cli.Context) error {
quiet := context.Bool("quiet")
client, ctx, cancel, err := commands.NewClient(context)
if err != nil {
return err
}
defer cancel()
namespaces := client.NamespaceService()
nss, err := namespaces.List(ctx)
if err != nil {
return err
}
if quiet {
for _, ns := range nss {
fmt.Println(ns)
}
return nil
}
tw := tabwriter.NewWriter(os.Stdout, 1, 8, 1, ' ', 0)
fmt.Fprintln(tw, "NAME\tLABELS\t")
for _, ns := range nss {
labels, err := namespaces.Labels(ctx, ns)
if err != nil {
return err
}
var labelStrings []string
for k, v := range labels {
labelStrings = append(labelStrings, strings.Join([]string{k, v}, "="))
}
sort.Strings(labelStrings)
fmt.Fprintf(tw, "%v\t%v\t\n", ns, strings.Join(labelStrings, ","))
}
return tw.Flush()
},
}
var removeCommand = cli.Command{
Name: "remove",
Aliases: []string{"rm"},
Usage: "remove one or more namespaces",
ArgsUsage: "<name> [<name>, ...]",
Description: "remove one or more namespaces. for now, the namespace must be empty",
Action: func(context *cli.Context) error {
var exitErr error
client, ctx, cancel, err := commands.NewClient(context)
if err != nil {
return err
}
defer cancel()
namespaces := client.NamespaceService()
for _, target := range context.Args() {
if err := namespaces.Delete(ctx, target); err != nil {
if !errdefs.IsNotFound(err) {
if exitErr == nil {
exitErr = errors.Wrapf(err, "unable to delete %v", target)
}
log.G(ctx).WithError(err).Errorf("unable to delete %v", target)
continue
}
}
fmt.Println(target)
}
return exitErr
},
}