func (d *NetworkDiagnostic) copyNetworkPodInfo(pod *kapi.Pod) error {
tmp, err := ioutil.TempFile("", "network-diags")
if err != nil {
return fmt.Errorf("Can not create local temporary file for tar: %v", err)
}
defer os.Remove(tmp.Name())
// Tar logdir on the remote node and copy to a local temporary file
errBuf := &bytes.Buffer{}
nodeLogDir := filepath.Join(util.NetworkDiagDefaultLogDir, util.NetworkDiagNodeLogDirPrefix, pod.Spec.NodeName)
cmd := []string{"chroot", util.NetworkDiagContainerMountPath, "tar", "-C", nodeLogDir, "-c", "."}
if err = util.Execute(d.Factory, cmd, pod, nil, tmp, errBuf); err != nil {
return fmt.Errorf("Creating remote tar locally failed: %v, %s", err, errBuf.String())
}
if err := tmp.Close(); err != nil {
return fmt.Errorf("Closing temporary tar file %s failed: %v", tmp.Name(), err)
}
// Extract copied temporary file locally
tmp, err = os.Open(tmp.Name())
if err != nil {
return fmt.Errorf("Can not open temporary tar file %s: %v", tmp.Name(), err)
}
defer tmp.Close()
tarHelper := tar.New()
tarHelper.SetExclusionPattern(nil)
logdir := filepath.Join(d.LogDir, util.NetworkDiagNodeLogDirPrefix, pod.Spec.NodeName)
err = tarHelper.ExtractTarStream(logdir, tmp)
if err != nil {
return fmt.Errorf("Untar local directory failed: %v, %s", err, errBuf.String())
}
return nil
}
func (d *NetworkDiagnostic) deleteRemoteNodeInfo(pod *kapi.Pod) error {
tmp, err := ioutil.TempFile("", "network-diags")
if err != nil {
return fmt.Errorf("Can not create local temporary file for tar: %v", err)
}
defer os.Remove(tmp.Name())
errBuf := &bytes.Buffer{}
nodeLogDir := filepath.Join(util.NetworkDiagDefaultLogDir, util.NetworkDiagNodeLogDirPrefix, pod.Spec.NodeName)
cmd := []string{"chroot", util.NetworkDiagContainerMountPath, "sh", "-c", fmt.Sprintf("shopt -s dotglob && rm -rf %s", nodeLogDir)}
if err = util.Execute(d.Factory, cmd, pod, nil, tmp, errBuf); err != nil {
return fmt.Errorf("Deleting remote logdir %q on node %q failed: %v, %s", nodeLogDir, pod.Spec.NodeName, err, errBuf.String())
}
return nil
}