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rbd: map only primary image
If the image is mirroring enabled
and primary consider it for mapping,
if the image is mirroring enabled but
not primary yet. return error message
until the image is marked as primary.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
(cherry picked from commit 71dbc7dbb4
)
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parent
66512b6a73
commit
04879bbb33
@ -138,8 +138,6 @@ type rbdImage struct {
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// an opened IOContext, call .openIoctx() before using
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ioctx *rados.IOContext
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// Primary represent if the image is primary or not.
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Primary bool
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// Set metadata on volume
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EnableMetadata bool
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}
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@ -512,6 +510,10 @@ func (ri *rbdImage) open() (*librbd.Image, error) {
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// isInUse checks if there is a watcher on the image. It returns true if there
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// is a watcher on the image, otherwise returns false.
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// In case of mirroring, the image should be primary to check watchers if the
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// image is secondary it returns an error.
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// isInUse is called with exponential backoff to check the image is used by
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// anyone else the returned bool value is discarded if its a RWX access.
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func (ri *rbdImage) isInUse() (bool, error) {
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image, err := ri.open()
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if err != nil {
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@ -532,11 +534,16 @@ func (ri *rbdImage) isInUse() (bool, error) {
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if err != nil {
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return false, err
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}
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ri.Primary = mirrorInfo.Primary
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if mirrorInfo.State == librbd.MirrorImageEnabled && !mirrorInfo.Primary {
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// Mapping secondary image can cause issues.returning error as the
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// bool value is discarded if it its RWX access.
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return false, fmt.Errorf("cannot map image %s it is not primary", ri)
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}
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// because we opened the image, there is at least one watcher
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defaultWatchers := 1
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if ri.Primary {
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if mirrorInfo.Primary {
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// if rbd mirror daemon is running, a watcher will be added by the rbd
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// mirror daemon for mirrored images.
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defaultWatchers++
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