Merge pull request #143 from Savostov-Arseny/cross-project-snapshots

feat: Add cross-project backup and restore support

changelogs/unreleased/143-Savostov-Arseny

@@ -0,0 +1,5 @@
+Add cross-project backup and restore functionality in the Velero GCP Plugin.
+
+The main changes include:
+Replaced compute.Disks.CreateSnapshot with compute.Snapshots.insert to enable cross-project snapshots.
+Configured the volumeProject to use the project from the provided GCP credentials and snapshotProject to use the project from the plugin configuration.

velero-plugin-for-gcp/volume_snapshotter.go

@@ -102,10 +102,7 @@ func (b *VolumeSnapshotter) Init(config map[string]string) error {
 
 	b.snapshotLocation = config[snapshotLocationKey]
 
-	b.volumeProject = config[projectKey]
-	if b.volumeProject == "" {
-		b.volumeProject = creds.ProjectID
-	}
+	b.volumeProject = creds.ProjectID
 
 	// get snapshot project from 'project' config key if specified,
 	// otherwise from the credentials file
@@ -300,13 +297,14 @@ func (b *VolumeSnapshotter) createSnapshot(snapshotName, volumeID, volumeAZ stri
 	gceSnap := compute.Snapshot{
 		Name:        snapshotName,
 		Description: getSnapshotTags(tags, disk.Description, b.log),
+		SourceDisk:  disk.SelfLink,
 	}
 
 	if b.snapshotLocation != "" {
 		gceSnap.StorageLocations = []string{b.snapshotLocation}
 	}
 
-	_, err = b.gce.Disks.CreateSnapshot(b.snapshotProject, volumeAZ, volumeID, &gceSnap).Do()
+	_, err = b.gce.Snapshots.Insert(b.snapshotProject, &gceSnap).Do()
 	if err != nil {
 		return "", errors.WithStack(err)
 	}
@@ -323,13 +321,14 @@ func (b *VolumeSnapshotter) createRegionSnapshot(snapshotName, volumeID, volumeR
 	gceSnap := compute.Snapshot{
 		Name:        snapshotName,
 		Description: getSnapshotTags(tags, disk.Description, b.log),
+		SourceDisk:  disk.SelfLink,
 	}
 
 	if b.snapshotLocation != "" {
 		gceSnap.StorageLocations = []string{b.snapshotLocation}
 	}
 
-	_, err = b.gce.RegionDisks.CreateSnapshot(b.snapshotProject, volumeRegion, volumeID, &gceSnap).Do()
+	_, err = b.gce.Snapshots.Insert(b.snapshotProject, &gceSnap).Do()
 	if err != nil {
 		return "", errors.WithStack(err)
 	}