forked from redhat-developer/odo
/
portforward.go
82 lines (69 loc) · 2.51 KB
/
portforward.go
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package debug
import (
"github.com/openshift/odo/pkg/occlient"
componentlabels "github.com/openshift/odo/pkg/component/labels"
"fmt"
"net/http"
"github.com/openshift/odo/pkg/log"
"github.com/openshift/odo/pkg/util"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
k8sgenclioptions "k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/client-go/tools/portforward"
"k8s.io/client-go/transport/spdy"
)
// DefaultPortForwarder implements the SPDY based port forwarder
type DefaultPortForwarder struct {
client *occlient.Client
k8sgenclioptions.IOStreams
componentName string
appName string
}
func NewDefaultPortForwarder(componentName, appName string, client *occlient.Client, streams k8sgenclioptions.IOStreams) *DefaultPortForwarder {
return &DefaultPortForwarder{
client: client,
IOStreams: streams,
componentName: componentName,
appName: appName,
}
}
// ForwardPorts forwards the port using the url for the remote pod.
// portPair is a pair of port in format "localPort:RemotePort" that is to be forwarded
// stop Chan is used to stop port forwarding
// ready Chan is used to signal failure to the channel receiver
func (f *DefaultPortForwarder) ForwardPorts(portPair string, stopChan, readyChan chan struct{}) error {
conf, err := f.client.KubeConfig.ClientConfig()
if err != nil {
return err
}
pod, err := f.getPodUsingComponentName()
if err != nil {
return err
}
if pod.Status.Phase != corev1.PodRunning {
return fmt.Errorf("unable to forward port because pod is not running. Current status=%v", pod.Status.Phase)
}
transport, upgrader, err := spdy.RoundTripperFor(conf)
if err != nil {
return err
}
req := f.client.BuildPortForwardReq(pod.Name)
dialer := spdy.NewDialer(upgrader, &http.Client{Transport: transport}, "POST", req.URL())
fw, err := portforward.New(dialer, []string{portPair}, stopChan, readyChan, f.Out, f.ErrOut)
if err != nil {
return err
}
log.Info("Started port forwarding at ports -", portPair)
return fw.ForwardPorts()
}
func (f *DefaultPortForwarder) getPodUsingComponentName() (*corev1.Pod, error) {
componentLabels := componentlabels.GetLabels(f.componentName, f.appName, false)
componentSelector := util.ConvertLabelsToSelector(componentLabels)
dc, err := f.client.GetOneDeploymentConfigFromSelector(componentSelector)
if err != nil {
return nil, errors.Wrap(err, "unable to get deployment for component")
}
// Find Pod for component
podSelector := fmt.Sprintf("deploymentconfig=%s", dc.Name)
return f.client.GetOnePodFromSelector(podSelector)
}