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Copies endpoint slices before any sorting

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This commit is contained in:
Steve Reed 2015-01-21 10:52:09 -08:00
parent 79a6bfb95f
commit 38241c7e80
1 changed files with 16 additions and 5 deletions
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21
pkg/proxy/roundrobin.go
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@ -172,6 +172,21 @@ func filterValidEndpoints(endpoints []string) []string {
return result
}
func endpointsAreEqual(left, right []string) bool {
if len(left) != len(right) {
return false
}
leftSorted := make([]string, len(left))
copy(leftSorted, left)
sort.Strings(leftSorted)
rightSorted := make([]string, len(right))
copy(rightSorted, right)
sort.Strings(rightSorted)
return reflect.DeepEqual(leftSorted, rightSorted)
}
func shuffleEndpoints(endpoints []string) []string {
shuffled := make([]string, len(endpoints))
perm := rand.Perm(len(endpoints))
@ -221,11 +236,7 @@ func (lb *LoadBalancerRR) OnUpdate(endpoints []api.Endpoints) {
for _, endpoint := range endpoints {
existingEndpoints, exists := lb.endpointsMap[endpoint.Name]
validEndpoints := filterValidEndpoints(endpoint.Endpoints)
// Need to compare sorted endpoints here, since they are shuffled below
// before being put into endpointsMap
sort.Strings(existingEndpoints)
sort.Strings(validEndpoints)
if !exists || !reflect.DeepEqual(existingEndpoints, validEndpoints) {
if !exists || !endpointsAreEqual(existingEndpoints, validEndpoints) {
glog.V(3).Infof("LoadBalancerRR: Setting endpoints for %s to %+v", endpoint.Name, endpoint.Endpoints)
updateServiceDetailMap(lb, endpoint.Name, validEndpoints)
// On update can be called without NewService being called externally.