mirror of https://github.com/linkerd/linkerd2.git
110 lines
3.2 KiB
Go
110 lines
3.2 KiB
Go
package cmd
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import (
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"context"
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"fmt"
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"os"
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"strings"
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"github.com/linkerd/linkerd2/pkg/k8s"
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"github.com/linkerd/linkerd2/pkg/k8s/resource"
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"github.com/spf13/cobra"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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const (
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yamlSep = "---\n"
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)
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func newCmdUninstall() *cobra.Command {
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var force bool
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cmd := &cobra.Command{
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Use: "uninstall",
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Args: cobra.NoArgs,
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Short: "Output Kubernetes resources to uninstall Linkerd control plane",
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Long: `Output Kubernetes resources to uninstall Linkerd control plane.
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This command provides all Kubernetes namespace-scoped and cluster-scoped resources (e.g services, deployments, RBACs, etc.) necessary to uninstall Linkerd control plane.`,
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Example: ` linkerd uninstall | kubectl delete -f -`,
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RunE: func(cmd *cobra.Command, args []string) error {
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k8sAPI, err := k8s.NewAPI(kubeconfigPath, kubeContext, impersonate, impersonateGroup, 0)
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if err != nil {
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return err
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}
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if !force {
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var fail bool
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// Retrtieve any installed extensions
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extensionNamespaces, err := k8sAPI.GetAllNamespacesWithExtensionLabel(cmd.Context())
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if err != nil {
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return err
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}
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// map of the namespace and the extension name
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// Namespace is used as key so as to support custom namespace installs
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extensions := make(map[string]string)
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if len(extensionNamespaces) > 0 {
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for _, extension := range extensionNamespaces {
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extensions[extension.Name] = extension.Labels[k8s.LinkerdExtensionLabel]
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}
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// Retrieve all the extension names
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extensionNames := make([]string, 0, len(extensions))
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for _, v := range extensions {
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extensionNames = append(extensionNames, fmt.Sprintf("* %s", v))
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}
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fmt.Fprintln(os.Stderr, fmt.Sprintf("Please uninstall the following extensions before uninstalling the control-plane:\n\t%s", strings.Join(extensionNames, "\n\t")))
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fail = true
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}
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podList, err := k8sAPI.CoreV1().Pods("").List(cmd.Context(), metav1.ListOptions{LabelSelector: k8s.ControllerNSLabel})
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if err != nil {
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return err
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}
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var injectedPods []string
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for _, pod := range podList.Items {
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// skip core control-plane namespace, and extension namespaces
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if pod.Namespace != controlPlaneNamespace && extensions[pod.Namespace] == "" {
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injectedPods = append(injectedPods, fmt.Sprintf("* %s", pod.Name))
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}
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}
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if len(injectedPods) > 0 {
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fmt.Fprintln(os.Stderr, fmt.Sprintf("Please uninject the following pods before uninstalling the control-plane:\n\t%s", strings.Join(injectedPods, "\n\t")))
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fail = true
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}
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if fail {
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os.Exit(1)
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}
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}
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return uninstallRunE(cmd.Context(), k8sAPI)
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},
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}
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cmd.Flags().BoolVarP(&force, "force", "f", force, "Force uninstall even if there exist non-control-plane injected pods")
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return cmd
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}
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func uninstallRunE(ctx context.Context, k8sAPI *k8s.KubernetesAPI) error {
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resources, err := resource.FetchKubernetesResources(ctx, k8sAPI,
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metav1.ListOptions{LabelSelector: k8s.ControllerNSLabel},
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)
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if err != nil {
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return err
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}
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for _, r := range resources {
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if err := r.RenderResource(os.Stdout); err != nil {
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return fmt.Errorf("error rendering Kubernetes resource:%v", err)
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}
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}
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return nil
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}
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