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Refactor PV selection into a common call for scheduler and PV controller

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This commit is contained in:
Michelle Au 2017-11-08 13:09:31 -08:00
parent 754017bef4
commit 3211b8b0c4
1 changed files with 65 additions and 52 deletions
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31
pkg/controller/volume/persistentvolume/index.go
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@ -90,6 +90,25 @@ func (pvIndex *persistentVolumeOrderedIndex) findByClaim(claim *v1.PersistentVol
// example above).
allPossibleModes := pvIndex.allPossibleMatchingAccessModes(claim.Spec.AccessModes)
for _, modes := range allPossibleModes {
volumes, err := pvIndex.listByAccessModes(modes)
if err != nil {
return nil, err
}
bestVol, err := findMatchingVolume(claim, volumes)
if err != nil {
return nil, err
}
if bestVol != nil {
return bestVol, nil
}
}
return nil, nil
}
func findMatchingVolume(claim *v1.PersistentVolumeClaim, volumes []*v1.PersistentVolume) (*v1.PersistentVolume, error) {
var smallestVolume *v1.PersistentVolume
var smallestVolumeQty resource.Quantity
requestedQty := claim.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
@ -105,12 +124,6 @@ func (pvIndex *persistentVolumeOrderedIndex) findByClaim(claim *v1.PersistentVol
selector = internalSelector
}
for _, modes := range allPossibleModes {
volumes, err := pvIndex.listByAccessModes(modes)
if err != nil {
return nil, err
}
// Go through all available volumes with two goals:
// - find a volume that is either pre-bound by user or dynamically
// provisioned for this claim. Because of this we need to loop through
@ -118,6 +131,8 @@ func (pvIndex *persistentVolumeOrderedIndex) findByClaim(claim *v1.PersistentVol
// - find the smallest matching one if there is no volume pre-bound to
// the claim.
for _, volume := range volumes {
volumeQty := volume.Spec.Capacity[v1.ResourceStorage]
// check if volumeModes do not match (Alpha and feature gate protected)
isMisMatch, err := checkVolumeModeMisMatches(&claim.Spec, &volume.Spec)
if err != nil {
@ -132,7 +147,6 @@ func (pvIndex *persistentVolumeOrderedIndex) findByClaim(claim *v1.PersistentVol
// this claim and volume are pre-bound; return
// the volume if the size request is satisfied,
// otherwise continue searching for a match
volumeQty := volume.Spec.Capacity[v1.ResourceStorage]
if volumeQty.Cmp(requestedQty) < 0 {
continue
}
@ -152,7 +166,6 @@ func (pvIndex *persistentVolumeOrderedIndex) findByClaim(claim *v1.PersistentVol
continue
}
volumeQty := volume.Spec.Capacity[v1.ResourceStorage]
if volumeQty.Cmp(requestedQty) >= 0 {
if smallestVolume == nil || smallestVolumeQty.Cmp(volumeQty) > 0 {
smallestVolume = volume
@ -165,7 +178,7 @@ func (pvIndex *persistentVolumeOrderedIndex) findByClaim(claim *v1.PersistentVol
// Found a matching volume
return smallestVolume, nil
}
}
return nil, nil
}