mirror of https://github.com/linkerd/linkerd2.git
93 lines
3.8 KiB
Go
93 lines
3.8 KiB
Go
package cmd
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import (
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"context"
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"regexp"
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"github.com/fatih/color"
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"github.com/linkerd/linkerd2/pkg/charts/linkerd2"
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"github.com/linkerd/linkerd2/pkg/healthcheck"
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"github.com/linkerd/linkerd2/pkg/k8s"
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"github.com/spf13/cobra"
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)
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const (
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defaultDockerRegistry = "ghcr.io/linkerd"
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defaultLinkerdNamespace = "linkerd"
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defaultMulticlusterNamespace = "linkerd-multicluster"
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defaultGatewayName = "linkerd-gateway"
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helmMulticlusterDefaultChartName = "linkerd2-multicluster"
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helmMulticlusterLinkDefaultChartName = "linkerd2-multicluster-link"
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tokenKey = "token"
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defaultServiceAccountName = "linkerd-service-mirror-remote-access-default"
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)
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var (
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apiAddr string // An empty value means "use the Kubernetes configuration"
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controlPlaneNamespace string
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kubeconfigPath string
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kubeContext string
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impersonate string
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impersonateGroup []string
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verbose bool
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// special handling for Windows, on all other platforms these resolve to
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// os.Stdout and os.Stderr, thanks to https://github.com/mattn/go-colorable
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stdout = color.Output
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// These regexs are not as strict as they could be, but are a quick and dirty
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// sanity check against illegal characters.
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alphaNumDashDot = regexp.MustCompile(`^[\.a-zA-Z0-9-]+$`)
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)
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// NewCmdMulticluster returns a new multicluster command
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func NewCmdMulticluster() *cobra.Command {
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multiclusterCmd := &cobra.Command{
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Use: "multicluster [flags]",
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Aliases: []string{"mc"},
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Args: cobra.NoArgs,
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Short: "Manages the multicluster setup for Linkerd",
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Long: `Manages the multicluster setup for Linkerd.
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This command provides subcommands to manage the multicluster support
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functionality of Linkerd. You can use it to install the service mirror
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components on a cluster, manage credentials and link clusters together.`,
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Example: ` # Install multicluster addons.
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linkerd --context=cluster-a multicluster install | kubectl --context=cluster-a apply -f -
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# Extract mirroring cluster credentials from cluster A and install them on cluster B
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linkerd --context=cluster-a multicluster link --cluster-name=target | kubectl apply --context=cluster-b -f -`,
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}
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multiclusterCmd.PersistentFlags().StringVarP(&controlPlaneNamespace, "linkerd-namespace", "L", defaultLinkerdNamespace, "Namespace in which Linkerd is installed")
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multiclusterCmd.PersistentFlags().StringVar(&kubeconfigPath, "kubeconfig", "", "Path to the kubeconfig file to use for CLI requests")
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multiclusterCmd.PersistentFlags().StringVar(&kubeContext, "context", "", "Name of the kubeconfig context to use")
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multiclusterCmd.PersistentFlags().StringVar(&impersonate, "as", "", "Username to impersonate for Kubernetes operations")
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multiclusterCmd.PersistentFlags().StringArrayVar(&impersonateGroup, "as-group", []string{}, "Group to impersonate for Kubernetes operations")
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multiclusterCmd.PersistentFlags().StringVar(&apiAddr, "api-addr", "", "Override kubeconfig and communicate directly with the control plane at host:port (mostly for testing)")
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multiclusterCmd.PersistentFlags().BoolVar(&verbose, "verbose", false, "Turn on debug logging")
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multiclusterCmd.AddCommand(newLinkCommand())
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multiclusterCmd.AddCommand(newUnlinkCommand())
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multiclusterCmd.AddCommand(newMulticlusterInstallCommand())
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multiclusterCmd.AddCommand(newMulticlusterUninstallCommand())
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multiclusterCmd.AddCommand(newGatewaysCommand())
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multiclusterCmd.AddCommand(newAllowCommand())
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return multiclusterCmd
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}
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func getLinkerdConfigMap(ctx context.Context) (*linkerd2.Values, error) {
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kubeAPI, err := k8s.NewAPI(kubeconfigPath, kubeContext, impersonate, impersonateGroup, 0)
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if err != nil {
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return nil, err
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}
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_, values, err := healthcheck.FetchCurrentConfiguration(ctx, kubeAPI, controlPlaneNamespace)
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if err != nil {
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return nil, err
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}
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return values, nil
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}
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