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Avoid parallel layer downloads in load command

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Signed-off-by: Doug MacEachern <dougm@vmware.com>
This commit is contained in:
Doug MacEachern 2015-02-18 18:45:39 -08:00
parent 934535db9c
commit de35ef2ebe
1 changed files with 14 additions and 0 deletions
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14
graph/load.go
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@ -104,6 +104,20 @@ func (s *TagStore) recursiveLoad(eng *engine.Engine, address, tmpImageDir string
log.Debugf("Error validating ID: %s", err) log.Debugf("Error validating ID: %s", err)
return err return err
} }
// ensure no two downloads of the same layer happen at the same time
if c, err := s.poolAdd("pull", "layer:"+img.ID); err != nil {
if c != nil {
log.Debugf("Image (id: %s) load is already running, waiting: %v", img.ID, err)
<-c
return nil
}
return err
}
defer s.poolRemove("pull", "layer:"+img.ID)
if img.Parent != "" { if img.Parent != "" {
if !s.graph.Exists(img.Parent) { if !s.graph.Exists(img.Parent) {
if err := s.recursiveLoad(eng, img.Parent, tmpImageDir); err != nil { if err := s.recursiveLoad(eng, img.Parent, tmpImageDir); err != nil {