rbd: check parent image while mirroring of child #4513
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This commit adds code to check parent image while enabling mirroring on child image. It errors out if the parent is in trash or not mirror enabled. This enables better communication with the user on why mirroring cannot be enabled on the child image. Signed-off-by: Rakshith R <rar@redhat.com>
| @@ -33,6 +33,39 @@ func (ri *rbdImage) EnableImageMirroring(mode librbd.ImageMirrorMode) error { | |||
| } | |||
| defer image.Close() | |||
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| parentInfo, err := image.GetParent() | |||
| if err != nil { | |||
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if there is no parent for the image this will fail with librbd.ErrNotFound error isn't it?
| if parentInfo.Image.Trash { | ||
| return fmt.Errorf("failed to enable mirroring on image %q:"+ | ||
| " parent %q is in trash", | ||
| parentInfo.Image.ImageID, ri) |
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returning ImageID is not useful, if possible return parent name or just discard parent id or log ImageName
| parentInfo.Image.ImageID, ri) | ||
| } | ||
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| parent, err := ri.getParent() |
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lets add Trash to the rbdImage struct and make only one call getParent() (need to populate Trash value as well) which gives all the details. we don't need to call getParent multiple times.
| } | ||
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| if parentMirroringInfo.State != librbd.MirrorImageEnabled { | ||
| return fmt.Errorf("failed to enable mirroring on image %q:"+ |
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we need to return Invalid RPC code when parent in not mirror enabled or when the parent is in trash?
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https://github.com/csi-addons/spec/tree/main/replication#enablevolumereplication
https://github.com/container-storage-interface/spec/blob/master/spec.md#createvolume-errors
So I'll modify csi addons spec EnableVolReplication call errors' INVALID_ARGUEMENT description to include something similar to createvolume_errors indicating we cannot enable replication on certain volumes.
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Will replace this with a new pr. |
This commit adds code to check parent image while enabling mirroring on child image. It errors out if the parent is in trash or not mirror enabled.
This enables better communication with the user on why mirroring cannot be enabled on the child image.