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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| package port_forward | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "github.com/clevyr/kubedb/internal/config" | ||
| "github.com/clevyr/kubedb/internal/util" | ||
| "github.com/jedib0t/go-pretty/v6/table" | ||
| log "github.com/sirupsen/logrus" | ||
| "github.com/spf13/cobra" | ||
| _ "k8s.io/client-go/plugin/pkg/client/auth" | ||
| "k8s.io/client-go/tools/portforward" | ||
| "k8s.io/client-go/transport/spdy" | ||
| "net/http" | ||
| "net/url" | ||
| "os" | ||
| "os/signal" | ||
| "strconv" | ||
| "strings" | ||
| "syscall" | ||
| ) | ||
|
|
||
| var Command = &cobra.Command{ | ||
| Use: "port-forward [local_port]", | ||
| Short: "set up a local port forward", | ||
| RunE: run, | ||
| PreRunE: preRun, | ||
| } | ||
|
|
||
| var conf config.PortForward | ||
|
|
||
| func preRun(cmd *cobra.Command, args []string) error { | ||
| err := util.DefaultSetup(cmd, &conf.Global) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if len(args) == 0 { | ||
| conf.LocalPort = conf.Grammar.DefaultPort() | ||
| } else { | ||
| port, err := strconv.ParseUint(args[0], 10, 16) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| conf.LocalPort = uint16(port) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func run(cmd *cobra.Command, args []string) (err error) { | ||
| log.WithField("pod", conf.Pod.Name).Info("setting up port forward") | ||
|
|
||
| path := fmt.Sprintf( | ||
| "/api/v1/namespaces/%s/pods/%s/portforward", | ||
| conf.Pod.Namespace, | ||
| conf.Pod.Name, | ||
| ) | ||
| hostIP := strings.TrimLeft(conf.Client.ClientConfig.Host, "htps:/") | ||
|
|
||
| transport, upgrader, err := spdy.RoundTripperFor(conf.Client.ClientConfig) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| dialer := spdy.NewDialer(upgrader, &http.Client{Transport: transport}, http.MethodPost, &url.URL{Scheme: "https", Path: path, Host: hostIP}) | ||
| stopCh := make(chan struct{}, 1) | ||
| readyCh := make(chan struct{}, 1) | ||
| ports := []string{fmt.Sprintf("%d:%d", conf.LocalPort, conf.Grammar.DefaultPort())} | ||
| fw, err := portforward.New(dialer, ports, stopCh, readyCh, nil, os.Stderr) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| go func() { | ||
| <-readyCh | ||
| log.WithFields(log.Fields{ | ||
| "local": conf.LocalPort, | ||
| "remote": conf.Grammar.DefaultPort(), | ||
| }).Info("port forward is ready") | ||
| t := table.NewWriter() | ||
| t.SetOutputMirror(os.Stdout) | ||
| t.SetTitle("%s Connection Parameters", conf.Pod.Namespace) | ||
| t.AppendRows([]table.Row{ | ||
| {"Hostname", "localhost"}, | ||
| {"Port", conf.LocalPort}, | ||
| {"Username", conf.Username}, | ||
| {"Password", conf.Password}, | ||
| {"Database", conf.Database}, | ||
| }) | ||
| t.SetStyle(table.StyleLight) | ||
| t.Render() | ||
| }() | ||
|
|
||
| errCh := make(chan error, 1) | ||
| go func() { | ||
| errCh <- fw.ForwardPorts() | ||
| }() | ||
|
|
||
| interruptCh := make(chan os.Signal, 1) | ||
| signal.Notify(interruptCh, os.Interrupt, syscall.SIGTERM) | ||
| select { | ||
| case err = <-errCh: | ||
| if err != nil { | ||
| return err | ||
| } | ||
| case <-interruptCh: | ||
| log.Info("received exit signal") | ||
| close(stopCh) | ||
| } | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| package config | ||
|
|
||
| type PortForward struct { | ||
| Global | ||
| LocalPort uint16 | ||
| } |
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