github.com/emc-advanced-dev/unik@v0.0.0-20190717152701-a58d3e8e33b7/pkg/providers/xen/stage.go (about)

     1  package xen
     2  
     3  import (
     4  	"os"
     5  	"path/filepath"
     6  	"time"
     7  
     8  	"github.com/sirupsen/logrus"
     9  	"github.com/emc-advanced-dev/pkg/errors"
    10  	unikos "github.com/solo-io/unik/pkg/os"
    11  	"github.com/solo-io/unik/pkg/types"
    12  )
    13  
    14  func (p *XenProvider) Stage(params types.StageImageParams) (_ *types.Image, err error) {
    15  	images, err := p.ListImages()
    16  	if err != nil {
    17  		return nil, errors.New("retrieving image list for existing image", err)
    18  	}
    19  	for _, image := range images {
    20  		if image.Name == params.Name {
    21  			if !params.Force {
    22  				return nil, errors.New("an image already exists with name '"+params.Name+"', try again with --force", nil)
    23  			} else {
    24  				logrus.WithField("image", image).Warnf("force: deleting previous image with name " + params.Name)
    25  				if err := p.DeleteImage(image.Id, true); err != nil {
    26  					logrus.Warn("failed to remove previously existing image", err)
    27  				}
    28  			}
    29  		}
    30  	}
    31  
    32  	imagePath := getImagePath(params.Name)
    33  	logrus.Debugf("making directory: %s", filepath.Dir(imagePath))
    34  	if err := os.MkdirAll(filepath.Dir(imagePath), 0777); err != nil {
    35  		return nil, errors.New("creating directory for boot image", err)
    36  	}
    37  	defer func() {
    38  		if err != nil && !params.NoCleanup {
    39  			os.RemoveAll(filepath.Dir(imagePath))
    40  		}
    41  	}()
    42  
    43  	if err := unikos.CopyFile(params.RawImage.LocalImagePath, getImagePath(params.Name)); err != nil {
    44  		return nil, errors.New("copying bootable image to image dir", err)
    45  	}
    46  
    47  	imagePathInfo, err := os.Stat(imagePath)
    48  	if err != nil {
    49  		return nil, errors.New("statting raw image file", err)
    50  	}
    51  	sizeMb := imagePathInfo.Size() >> 20
    52  
    53  	logrus.WithFields(logrus.Fields{
    54  		"name": params.Name,
    55  		"id":   params.Name,
    56  		"size": sizeMb,
    57  	}).Infof("copying raw boot image")
    58  
    59  	image := &types.Image{
    60  		Id:             params.Name,
    61  		Name:           params.Name,
    62  		RunSpec:        params.RawImage.RunSpec,
    63  		StageSpec:      params.RawImage.StageSpec,
    64  		SizeMb:         sizeMb,
    65  		Infrastructure: types.Infrastructure_XEN,
    66  		Created:        time.Now(),
    67  	}
    68  
    69  	if err := p.state.ModifyImages(func(images map[string]*types.Image) error {
    70  		images[params.Name] = image
    71  		return nil
    72  	}); err != nil {
    73  		return nil, errors.New("modifying image map in state", err)
    74  	}
    75  
    76  	logrus.WithFields(logrus.Fields{"image": image}).Infof("image created succesfully")
    77  	return image, nil
    78  }