Make uninstall more robust and informative
Signed-off-by: Carlisia <carlisia@vmware.com>pull/3618/head
Carlisia
parent
e9c997839e
commit
4fff2a4a5c
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@ -19,13 +19,17 @@ package uninstall
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import (
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"context"
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"fmt"
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"strings"
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"time"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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corev1 "k8s.io/api/core/v1"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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kubeerrs "k8s.io/apimachinery/pkg/util/errors"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/client-go/kubernetes"
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@ -33,82 +37,139 @@ import (
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"github.com/vmware-tanzu/velero/pkg/client"
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"github.com/vmware-tanzu/velero/pkg/cmd"
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"github.com/vmware-tanzu/velero/pkg/cmd/util/output"
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"github.com/vmware-tanzu/velero/pkg/cmd/cli"
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"github.com/vmware-tanzu/velero/pkg/install"
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"github.com/vmware-tanzu/velero/pkg/util/kube"
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)
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// Uninstall uninstalls all components deployed using velero install command
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func Uninstall(ctx context.Context, client *kubernetes.Clientset, extensionsClient *apiextensionsclientset.Clientset, veleroNamespace string) error {
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if veleroNamespace == "" {
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veleroNamespace = "velero"
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}
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err := DeleteNamespace(ctx, client, veleroNamespace)
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if err != nil {
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return errors.WithMessagef(err, "Uninstall failed removing Velero namespace %s", veleroNamespace)
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// uninstallOptions collects all the options for uninstalling Velero from a Kubernetes cluster.
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type uninstallOptions struct {
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wait, force bool
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}
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rolebinding := install.ClusterRoleBinding(veleroNamespace)
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err = client.RbacV1().ClusterRoleBindings().Delete(ctx, rolebinding.Name, metav1.DeleteOptions{})
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if err != nil {
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return errors.WithMessagef(err, "Uninstall failed removing Velero cluster role binding %s", rolebinding)
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}
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veleroLabels := labels.FormatLabels(install.Labels())
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crds, err := extensionsClient.ApiextensionsV1().CustomResourceDefinitions().List(ctx, metav1.ListOptions{
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LabelSelector: veleroLabels,
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})
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if err != nil {
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return errors.WithMessagef(err, "Uninstall failed listing Velero crds")
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}
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for _, removeCRD := range crds.Items {
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err = extensionsClient.ApiextensionsV1().CustomResourceDefinitions().Delete(ctx, removeCRD.ObjectMeta.Name, metav1.DeleteOptions{})
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if err != nil {
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return errors.WithMessagef(err, "Uninstall failed removing CRD %s", removeCRD.ObjectMeta.Name)
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}
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}
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fmt.Println("Uninstalled Velero")
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return nil
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}
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func DeleteNamespace(ctx context.Context, client *kubernetes.Clientset, namespace string) error {
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err := client.CoreV1().Namespaces().Delete(ctx, namespace, metav1.DeleteOptions{})
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if err != nil {
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return errors.WithMessagef(err, "Delete namespace failed removing namespace %s", namespace)
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}
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return wait.Poll(1*time.Second, 3*time.Minute, func() (bool, error) {
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_, err := client.CoreV1().Namespaces().Get(ctx, namespace, metav1.GetOptions{})
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if err != nil {
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// Commented this out because not sure if removing this is okay
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// Printing this on Uninstall will lead to confusion
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// fmt.Printf("Namespaces.Get after delete return err %v\n", err)
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return true, nil // Assume any error means the delete was successful
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}
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return false, nil
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})
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// BindFlags adds command line values to the options struct.
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func (o *uninstallOptions) BindFlags(flags *pflag.FlagSet) {
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flags.BoolVar(&o.wait, "wait", o.wait, "Wait for Velero deployment to be ready. Optional.")
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flags.BoolVar(&o.force, "force", o.force, "Forces the Velero uninstall. Optional.")
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}
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// NewCommand creates a cobra command.
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func NewCommand(f client.Factory) *cobra.Command {
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o := &uninstallOptions{}
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c := &cobra.Command{
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Use: "uninstall",
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Short: "Uninstall Velero",
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Long: `Uninstall Velero along with the CRDs.
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The '--namespace' flag can be used to specify the namespace where velero is installed (default: velero).
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Use '--wait' to wait for the Velero Deployment to be ready before proceeding.
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Use '--force' to skip the prompt confirming if you want to uninstall Velero.
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`,
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Example: `# velero uninstall -n backup`,
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Example: `# velero uninstall -n staging`,
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Run: func(c *cobra.Command, args []string) {
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veleroNs := strings.TrimSpace(f.Namespace())
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cl, extCl, err := kube.GetClusterClient()
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// Confirm if not asked to force-skip confirmation
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if !o.force {
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fmt.Println("You are about to uninstall Velero.")
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if !cli.GetConfirmation() {
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// Don't do anything unless we get confirmation
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return
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}
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}
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client, extCl, err := kube.GetClusterClient()
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cmd.CheckError(err)
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cmd.CheckError(Uninstall(context.Background(), cl, extCl, veleroNs))
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cmd.CheckError(Run(context.Background(), client, extCl, f.Namespace(), o.wait))
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},
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}
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output.BindFlags(c.Flags())
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output.ClearOutputFlagDefault(c)
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o.BindFlags(c.Flags())
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return c
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}
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// Run removes all components that were deployed using the Velero install command
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func Run(ctx context.Context, client *kubernetes.Clientset, extensionsClient *apiextensionsclientset.Clientset, namespace string, waitToTerminate bool) error {
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var errs []error
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// namespace
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ns, err := client.CoreV1().Namespaces().Get(ctx, namespace, metav1.GetOptions{})
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if err != nil {
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if apierrors.IsNotFound(err) {
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fmt.Printf("Velero installation namespace %q does not exist, skipping.\n", namespace)
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} else {
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errs = append(errs, errors.WithStack(err))
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}
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} else {
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if ns.Status.Phase == corev1.NamespaceTerminating {
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fmt.Printf("Velero installation namespace %q is terminating.\n", namespace)
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} else {
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err = client.CoreV1().Namespaces().Delete(ctx, ns.Name, metav1.DeleteOptions{})
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if err != nil {
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errs = append(errs, errors.WithStack(err))
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}
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}
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}
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// rolebinding
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crb := install.ClusterRoleBinding(namespace)
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if err := client.RbacV1().ClusterRoleBindings().Delete(ctx, crb.Name, metav1.DeleteOptions{}); err != nil {
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if apierrors.IsNotFound(err) {
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fmt.Printf("Velero installation rolebinding %q does not exist, skipping.\n", crb.Name)
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} else {
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errs = append(errs, errors.WithStack(err))
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}
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}
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// CRDs
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veleroLabels := labels.FormatLabels(install.Labels())
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crds, err := extensionsClient.ApiextensionsV1().CustomResourceDefinitions().List(ctx, metav1.ListOptions{
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LabelSelector: veleroLabels,
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})
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if err != nil {
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errs = append(errs, errors.WithStack(err))
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}
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if len(crds.Items) == 0 {
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fmt.Print("Velero CRDs do not exist, skipping.\n")
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} else {
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for _, removeCRD := range crds.Items {
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if err = extensionsClient.ApiextensionsV1().CustomResourceDefinitions().Delete(ctx, removeCRD.ObjectMeta.Name, metav1.DeleteOptions{}); err != nil {
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errs = append(errs, errors.WithStack(err))
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}
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}
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}
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if waitToTerminate && len(ns.Name) != 0 {
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fmt.Println("Waiting for Velero uninstall to complete. You may safely press ctrl-c to stop waiting - uninstall will continue in the background.")
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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checkFunc := func() {
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nsUpdated, _ := client.CoreV1().Namespaces().Get(ctx, namespace, metav1.GetOptions{})
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if err != nil {
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errs = append(errs, errors.WithStack(err))
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}
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if nsUpdated.Status.Phase == corev1.NamespaceTerminating {
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fmt.Print(".")
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}
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if nsUpdated.Status.Phase != corev1.NamespaceTerminating {
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fmt.Print("\n")
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cancel()
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}
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}
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wait.Until(checkFunc, 5*time.Millisecond, ctx.Done())
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}
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if kubeerrs.NewAggregate(errs) != nil {
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fmt.Printf("Errors while attempting to uninstall Velero: %q", kubeerrs.NewAggregate(errs))
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return kubeerrs.NewAggregate(errs)
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}
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fmt.Println("Velero uninstalled ⛵")
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return nil
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}
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@ -292,7 +292,12 @@ func VeleroInstall(ctx context.Context, veleroImage string, veleroNamespace stri
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}
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func VeleroUninstall(ctx context.Context, client *kubernetes.Clientset, extensionsClient *apiextensionsclient.Clientset, veleroNamespace string) error {
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return uninstall.Uninstall(ctx, client, extensionsClient, veleroNamespace)
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err := uninstall.Run(ctx, client, extensionsClient, veleroNamespace, true)
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if err != nil {
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return err
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}
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return nil
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}
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func VeleroBackupLogs(ctx context.Context, veleroCLI string, veleroNamespace string, backupName string) error {
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