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allow a read-only rbd image mounted by multiple pods

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Signed-off-by: Huamin Chen <hchen@redhat.com>
This commit is contained in:
Huamin Chen 2016-07-25 11:29:07 -04:00
parent ed3a29bd6a
commit 730db45eab
1 changed files with 4 additions and 1 deletions
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5
plugin/pkg/scheduler/algorithm/predicates/predicates.go
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@ -108,7 +108,10 @@ func isVolumeConflict(volume api.Volume, pod *api.Pod) bool {
if volume.RBD != nil && existingVolume.RBD != nil {
mon, pool, image := volume.RBD.CephMonitors, volume.RBD.RBDPool, volume.RBD.RBDImage
emon, epool, eimage := existingVolume.RBD.CephMonitors, existingVolume.RBD.RBDPool, existingVolume.RBD.RBDImage
if haveSame(mon, emon) && pool == epool && image == eimage {
// two RBDs images are the same if they share the same Ceph monitor, are in the same RADOS Pool, and have the same image name
// only one read-write mount is permitted for the same RBD image.
// same RBD image mounted by multiple Pods conflicts unless all Pods mount the image read-only
if haveSame(mon, emon) && pool == epool && image == eimage && !(volume.RBD.ReadOnly && existingVolume.RBD.ReadOnly) {
return true
}
}