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Merge pull request kubernetes-sigs#859 from wzshiming/feat/hack-etcd
[kwokctl] Add hack subcommand for etcd operation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,186 @@ | ||
| /* | ||
| Copyright 2023 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| // Package del defines a command to delete data in etcd | ||
| package del | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| "k8s.io/apimachinery/pkg/runtime/schema" | ||
|
|
||
| "sigs.k8s.io/kwok/pkg/config" | ||
| "sigs.k8s.io/kwok/pkg/kwokctl/dryrun" | ||
| "sigs.k8s.io/kwok/pkg/kwokctl/etcd" | ||
| "sigs.k8s.io/kwok/pkg/kwokctl/runtime" | ||
| "sigs.k8s.io/kwok/pkg/log" | ||
| "sigs.k8s.io/kwok/pkg/utils/client" | ||
| "sigs.k8s.io/kwok/pkg/utils/path" | ||
| ) | ||
|
|
||
| type flagpole struct { | ||
| Name string | ||
| Namespace string | ||
| Prefix string | ||
| Output string | ||
| } | ||
|
|
||
| // NewCommand returns a new cobra.Command for use hack the etcd data. | ||
| func NewCommand(ctx context.Context) *cobra.Command { | ||
| flags := &flagpole{} | ||
|
|
||
| cmd := &cobra.Command{ | ||
| Args: cobra.RangeArgs(0, 2), | ||
| Use: "delete [resource] [name]", | ||
| Short: "delete data in etcd", | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
| flags.Name = config.DefaultCluster | ||
| err := runE(cmd.Context(), flags, args) | ||
| if err != nil { | ||
| return fmt.Errorf("%v: %w", args, err) | ||
| } | ||
| return nil | ||
| }, | ||
| } | ||
|
|
||
| cmd.Flags().StringVar(&flags.Prefix, "prefix", "/registry", "prefix of the key") | ||
| cmd.Flags().StringVarP(&flags.Output, "output", "o", "key", "output format. One of: (key, none).") | ||
| cmd.Flags().StringVarP(&flags.Namespace, "namespace", "n", "", "namespace of resource") | ||
| return cmd | ||
| } | ||
|
|
||
| func runE(ctx context.Context, flags *flagpole, args []string) error { | ||
| name := config.ClusterName(flags.Name) | ||
| workdir := path.Join(config.ClustersDir, flags.Name) | ||
|
|
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| logger := log.FromContext(ctx) | ||
| logger = logger.With("cluster", flags.Name) | ||
| ctx = log.NewContext(ctx, logger) | ||
|
|
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| rt, err := runtime.DefaultRegistry.Load(ctx, name, workdir) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if rt.IsDryRun() { | ||
| switch len(args) { | ||
| case 1: | ||
| if flags.Namespace == "" { | ||
| dryrun.PrintMessage("kubectl delete %s --all -A", args[0]) | ||
| } else { | ||
| dryrun.PrintMessage("kubectl delete %s --all -n %s", args[0], flags.Namespace) | ||
| } | ||
| case 2: | ||
| if flags.Namespace == "" { | ||
| dryrun.PrintMessage("kubectl delete %s %s", args[0], args[1]) | ||
| } else { | ||
| dryrun.PrintMessage("kubectl delete %s %s -n %s", args[0], args[1], flags.Namespace) | ||
| } | ||
| default: | ||
| if flags.Namespace == "" { | ||
| dryrun.PrintMessage("kubectl delete all --all -A") | ||
| } else { | ||
| dryrun.PrintMessage("kubectl delete all -all -n %s", flags.Namespace) | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| etcdclient, err := rt.GetEtcdClient(ctx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| var targetGvr schema.GroupVersionResource | ||
| var targetName string | ||
| var targetNamespace string | ||
| if len(args) != 0 { | ||
| kubeconfigPath := rt.GetWorkdirPath(runtime.InHostKubeconfigName) | ||
| clientset, err := client.NewClientset("", kubeconfigPath) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| dc, err := clientset.ToDiscoveryClient() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| rl, err := dc.ServerPreferredResources() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| resourceName := args[0] | ||
|
|
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| gvr, resource, err := client.MatchShortResourceName(rl, resourceName) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| if resource.Namespaced { | ||
| if flags.Namespace == "" { | ||
| flags.Namespace = "default" | ||
| } | ||
| } else { | ||
| if flags.Namespace != "" { | ||
| return fmt.Errorf("resource %s is not namespaced", gvr) | ||
| } | ||
| } | ||
|
|
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| targetGvr = gvr | ||
| targetNamespace = flags.Namespace | ||
| if len(args) >= 2 { | ||
| targetName = args[1] | ||
| } | ||
| } | ||
|
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||
| var count int | ||
| var response func(kv *etcd.KeyValue) error | ||
| if flags.Output == "key" { | ||
| response = func(kv *etcd.KeyValue) error { | ||
| count++ | ||
| fmt.Fprintf(os.Stdout, "%s\n", kv.Key) | ||
| return nil | ||
| } | ||
| } | ||
|
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| opOpts := []etcd.OpOption{ | ||
| etcd.WithName(targetName, targetNamespace), | ||
| etcd.WithGVR(targetGvr), | ||
| } | ||
|
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| if response != nil { | ||
| opOpts = append(opOpts, | ||
| etcd.WithKeysOnly(), | ||
| etcd.WithResponse(response), | ||
| ) | ||
| } | ||
|
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| err = etcdclient.Delete(ctx, flags.Prefix, | ||
| opOpts..., | ||
| ) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| if log.IsTerminal() && flags.Output == "key" { | ||
| fmt.Fprintf(os.Stderr, "delete %d keys\n", count) | ||
| } | ||
| return nil | ||
| } |
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