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| 1 | +package karpenter |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "fmt" |
| 6 | + "os" |
| 7 | + "time" |
| 8 | + |
| 9 | + "github.com/awslabs/eksdemo/pkg/kubernetes" |
| 10 | + api_errors "k8s.io/apimachinery/pkg/api/errors" |
| 11 | + "k8s.io/apimachinery/pkg/api/meta" |
| 12 | + metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| 13 | + "k8s.io/apimachinery/pkg/runtime/schema" |
| 14 | + "k8s.io/cli-runtime/pkg/genericclioptions" |
| 15 | + "k8s.io/cli-runtime/pkg/genericiooptions" |
| 16 | + "k8s.io/cli-runtime/pkg/printers" |
| 17 | + "k8s.io/cli-runtime/pkg/resource" |
| 18 | + "k8s.io/client-go/dynamic" |
| 19 | + cmdwait "k8s.io/kubectl/pkg/cmd/wait" |
| 20 | +) |
| 21 | + |
| 22 | +func DeleteCustomResources(kubeContext string) error { |
| 23 | + client, err := kubernetes.DynamicClient(kubeContext) |
| 24 | + if err != nil { |
| 25 | + return fmt.Errorf("failed creating kubernetes dynamic client: %w", err) |
| 26 | + } |
| 27 | + |
| 28 | + if err := DeleteNodePool(client); err != nil { |
| 29 | + return err |
| 30 | + } |
| 31 | + |
| 32 | + return DeleteEC2NodeClass(client, kubeContext) |
| 33 | +} |
| 34 | + |
| 35 | +// This uses cli-runtime's Resource Builder and kubectl's waiter to simplify the delete and wait |
| 36 | +// Ideally this should use the Dynamic Client and a custom waiter |
| 37 | +func DeleteEC2NodeClass(client dynamic.Interface, kubeContext string) error { |
| 38 | + getter := genericclioptions.NewConfigFlags(true) |
| 39 | + getter.Context = &kubeContext |
| 40 | + |
| 41 | + restMapper, err := getter.ToRESTMapper() |
| 42 | + if err != nil { |
| 43 | + return fmt.Errorf("failed creating restMapper: %w", err) |
| 44 | + } |
| 45 | + |
| 46 | + gvk := "EC2NodeClass.v1beta1.karpenter.k8s.aws" |
| 47 | + fullySpecifiedGVK, _ := schema.ParseKindArg(gvk) |
| 48 | + |
| 49 | + _, err = restMapper.RESTMapping(fullySpecifiedGVK.GroupKind(), fullySpecifiedGVK.Version) |
| 50 | + if err != nil { |
| 51 | + if meta.IsNoMatchError(err) { |
| 52 | + // EC2NodeClass kind doesn't exist, skip deletion |
| 53 | + return nil |
| 54 | + } |
| 55 | + return err |
| 56 | + } |
| 57 | + |
| 58 | + infos, err := resource.NewBuilder(getter).Unstructured().ResourceTypes(gvk).SelectAllParam(true).Flatten().Do().Infos() |
| 59 | + if err != nil { |
| 60 | + return err |
| 61 | + } |
| 62 | + |
| 63 | + for _, info := range infos { |
| 64 | + fmt.Printf("Deleting Karpenter EC2NodeClass %q\n", info.Name) |
| 65 | + |
| 66 | + _, err := resource.NewHelper(info.Client, info.Mapping).Delete(info.Namespace, info.Name) |
| 67 | + if err != nil { |
| 68 | + return fmt.Errorf("failed to delete EC2NodeClass %q: %w", info.Name, err) |
| 69 | + } |
| 70 | + } |
| 71 | + |
| 72 | + fmt.Println("Waiting up to 30 seconds for EC2NodeClasses to be deleted...") |
| 73 | + waitOptions := cmdwait.WaitOptions{ |
| 74 | + ResourceFinder: genericclioptions.ResourceFinderForResult(resource.InfoListVisitor(infos)), |
| 75 | + DynamicClient: client, |
| 76 | + Timeout: 30 * time.Second, |
| 77 | + |
| 78 | + Printer: &printers.NamePrinter{ShortOutput: false, Operation: "deleted"}, |
| 79 | + ConditionFn: cmdwait.IsDeleted, |
| 80 | + IOStreams: genericiooptions.IOStreams{Out: os.Stdout, ErrOut: os.Stderr}, |
| 81 | + } |
| 82 | + |
| 83 | + return waitOptions.RunWait() |
| 84 | +} |
| 85 | + |
| 86 | +func DeleteNodePool(client dynamic.Interface) error { |
| 87 | + nodePools := schema.GroupVersionResource{ |
| 88 | + Group: "karpenter.sh", |
| 89 | + Version: "v1beta1", |
| 90 | + Resource: "nodepools", |
| 91 | + } |
| 92 | + |
| 93 | + list, err := client.Resource(nodePools).List(context.Background(), metav1.ListOptions{}) |
| 94 | + if err != nil { |
| 95 | + if api_errors.IsNotFound(err) { |
| 96 | + // nodepools resource doesn't exist, skip deletion |
| 97 | + return nil |
| 98 | + } |
| 99 | + return err |
| 100 | + } |
| 101 | + |
| 102 | + for _, item := range list.Items { |
| 103 | + nodePoolName := item.GetName() |
| 104 | + |
| 105 | + fmt.Printf("Deleting Karpenter NodePool %q\n", nodePoolName) |
| 106 | + if err := client.Resource(nodePools).Delete(context.Background(), nodePoolName, metav1.DeleteOptions{}); err != nil { |
| 107 | + fmt.Printf("failed to delete NodePool %q: %s\n", nodePoolName, err) |
| 108 | + } |
| 109 | + } |
| 110 | + return nil |
| 111 | +} |
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