Example #1
0
func (h *Host) fetchImage(name types.ACIdentifier, labels types.Labels) (*Image, error) {
	if aci, asc, err := fetch.DiscoverACI(discovery.App{Name: name, Labels: labels.ToMap()}); err != nil {
		return nil, errors.Trace(err)
	} else if aci == nil {
		return nil, ErrNotFound
	} else {
		return h.ImportImage(name, aci, asc)
	}
}
Example #2
0
// True if all labels in `labels` are present in `candidate` and have
// the same value
func MatchLabels(labels, candidate types.Labels) bool {
	if len(labels) == 0 {
		return true
	}
	cmap := candidate.ToMap()
	for _, label := range labels {
		if v, ok := cmap[label.Name]; !ok || v != label.Value {
			return false
		}
	}
	return true
}
Example #3
0
// GetACI retrieves the ACI that best matches the provided app name and labels.
// The returned value is the blob store key of the retrieved ACI.
// If there are multiple matching ACIs choose the latest one (defined as the
// last one imported in the store).
// If no version label is requested, ACIs marked as latest in the ACIInfo are
// preferred.
func (s Store) GetACI(name types.ACIdentifier, labels types.Labels) (string, error) {
	var curaciinfo *ACIInfo
	versionRequested := false
	if _, ok := labels.Get("version"); ok {
		versionRequested = true
	}

	var aciinfos []*ACIInfo
	err := s.db.Do(func(tx *sql.Tx) error {
		var err error
		aciinfos, _, err = GetACIInfosWithAppName(tx, name.String())
		return err
	})
	if err != nil {
		return "", err
	}

nextKey:
	for _, aciinfo := range aciinfos {
		im, err := s.GetImageManifest(aciinfo.BlobKey)
		if err != nil {
			return "", fmt.Errorf("error getting image manifest: %v", err)
		}

		// The image manifest must have all the requested labels
		for _, l := range labels {
			ok := false
			for _, rl := range im.Labels {
				if l.Name == rl.Name && l.Value == rl.Value {
					ok = true
					break
				}
			}
			if !ok {
				continue nextKey
			}
		}

		if curaciinfo != nil {
			// If no version is requested prefer the acis marked as latest
			if !versionRequested {
				if !curaciinfo.Latest && aciinfo.Latest {
					curaciinfo = aciinfo
					continue nextKey
				}
				if curaciinfo.Latest && !aciinfo.Latest {
					continue nextKey
				}
			}
			// If multiple matching image manifests are found, choose the latest imported in the cas.
			if aciinfo.ImportTime.After(curaciinfo.ImportTime) {
				curaciinfo = aciinfo
			}
		} else {
			curaciinfo = aciinfo
		}
	}

	if curaciinfo != nil {
		return curaciinfo.BlobKey, nil
	}
	return "", fmt.Errorf("aci not found")
}