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Make HPA tolerance a flag

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Fix #18155

Make HPA tolerance configurable as a flag. This change allows us to use
different tolerance values in production/testing.

Signed-off-by: mattjmcnaughton <mattjmcnaughton@gmail.com>
This commit is contained in:
mattjmcnaughton
2017-09-11 09:59:53 -04:00
parent ca712680c7
commit abd46684d4
10 changed files with 37 additions and 19 deletions
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5
pkg/controller/podautoscaler/legacy_horizontal_test.go
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@@ -484,6 +484,7 @@ func (tc *legacyTestCase) runTest(t *testing.T) {
replicaCalc := &ReplicaCalculator{
metricsClient: metricsClient,
podsGetter: testClient.Core(),
tolerance: defaultTestingTolerance,
}
informerFactory := informers.NewSharedInformerFactory(testClient, controller.NoResyncPeriodFunc())
@@ -965,7 +966,7 @@ func LegacyTestComputedToleranceAlgImplementation(t *testing.T) {
perPodRequested := totalRequestedCPUOfAllPods / startPods
// Force a minimal scaling event by satisfying (tolerance < 1 - resourcesUsedRatio).
target := math.Abs(1/(requestedToUsed*(1-tolerance))) + .01
target := math.Abs(1/(requestedToUsed*(1-defaultTestingTolerance))) + .01
finalCPUPercentTarget := int32(target * 100)
resourcesUsedRatio := float64(totalUsedCPUOfAllPods) / float64(float64(totalRequestedCPUOfAllPods)*target)
@@ -1010,7 +1011,7 @@ func LegacyTestComputedToleranceAlgImplementation(t *testing.T) {
// Reuse the data structure above, now testing "unscaling".
// Now, we test that no scaling happens if we are in a very close margin to the tolerance
target = math.Abs(1/(requestedToUsed*(1-tolerance))) + .004
target = math.Abs(1/(requestedToUsed*(1-defaultTestingTolerance))) + .004
finalCPUPercentTarget = int32(target * 100)
tc.CPUTarget = finalCPUPercentTarget
tc.initialReplicas = startPods