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Merge pull request #66882 from ryanmcnamara/rm/stable-controllerrevisions-sort

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Stably sort controllerrevisions
This commit is contained in:
Kubernetes Prow Robot 2018-12-19 00:51:29 -08:00 committed by GitHub
commit ec4105a6d3
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2 changed files with 37 additions and 7 deletions
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9
pkg/controller/history/controller_history.go
View File

@ -113,7 +113,7 @@ func HashControllerRevision(revision *apps.ControllerRevision, probe *int32) str
// SortControllerRevisions sorts revisions by their Revision.
func SortControllerRevisions(revisions []*apps.ControllerRevision) {
sort.Sort(byRevision(revisions))
sort.Stable(byRevision(revisions))
}
// EqualRevision returns true if lhs and rhs are either both nil, or both point to non-nil ControllerRevisions that
@ -162,7 +162,14 @@ func (br byRevision) Len() int {
return len(br)
}
// Less breaks ties first by creation timestamp, then by name
func (br byRevision) Less(i, j int) bool {
if br[i].Revision == br[j].Revision {
if br[j].CreationTimestamp.Equal(&br[i].CreationTimestamp) {
return br[i].Name < br[j].Name
}
return br[j].CreationTimestamp.After(br[i].CreationTimestamp.Time)
}
return br[i].Revision < br[j].Revision
}

35
pkg/controller/history/controller_history_test.go
View File

@ -40,6 +40,7 @@ import (
"k8s.io/apimachinery/pkg/util/strategicpatch"
core "k8s.io/client-go/testing"
"time"
)
func TestRealHistory_ListControllerRevisions(t *testing.T) {
@ -1545,12 +1546,14 @@ func TestSortControllerRevisions(t *testing.T) {
want []string
}
testFn := func(test *testcase, t *testing.T) {
SortControllerRevisions(test.revisions)
for i := range test.revisions {
if test.revisions[i].Name != test.want[i] {
t.Errorf("%s: want %s at %d got %s", test.name, test.want[i], i, test.revisions[i].Name)
t.Run(test.name, func(t *testing.T) {
SortControllerRevisions(test.revisions)
for i := range test.revisions {
if test.revisions[i].Name != test.want[i] {
t.Errorf("%s: want %s at %d got %s", test.name, test.want[i], i, test.revisions[i].Name)
}
}
}
})
}
ss1 := newStatefulSet(3, "ss1", types.UID("ss1"), map[string]string{"foo": "bar"})
ss1.Status.CollisionCount = new(int32)
@ -1559,17 +1562,32 @@ func TestSortControllerRevisions(t *testing.T) {
if err != nil {
t.Fatal(err)
}
ss1Rev1.Namespace = ss1.Namespace
ss1Rev2, err := NewControllerRevision(ss1, parentKind, ss1.Spec.Template.Labels, rawTemplate(&ss1.Spec.Template), 2, ss1.Status.CollisionCount)
if err != nil {
t.Fatal(err)
}
ss1Rev2.Namespace = ss1.Namespace
ss1Rev3, err := NewControllerRevision(ss1, parentKind, ss1.Spec.Template.Labels, rawTemplate(&ss1.Spec.Template), 3, ss1.Status.CollisionCount)
if err != nil {
t.Fatal(err)
}
ss1Rev3.Namespace = ss1.Namespace
ss1Rev3Time2, err := NewControllerRevision(ss1, parentKind, ss1.Spec.Template.Labels, rawTemplate(&ss1.Spec.Template), 3, ss1.Status.CollisionCount)
if err != nil {
t.Fatal(err)
}
ss1Rev3Time2.Namespace = ss1.Namespace
ss1Rev3Time2.CreationTimestamp = metav1.Time{Time: ss1Rev3.CreationTimestamp.Add(time.Second)}
ss1Rev3Time2Name2, err := NewControllerRevision(ss1, parentKind, ss1.Spec.Template.Labels, rawTemplate(&ss1.Spec.Template), 3, ss1.Status.CollisionCount)
if err != nil {
t.Fatal(err)
}
ss1Rev3Time2Name2.Namespace = ss1.Namespace
ss1Rev3Time2Name2.CreationTimestamp = metav1.Time{Time: ss1Rev3.CreationTimestamp.Add(time.Second)}
tests := []testcase{
{
@ -1587,6 +1605,11 @@ func TestSortControllerRevisions(t *testing.T) {
revisions: []*apps.ControllerRevision{ss1Rev3, ss1Rev2, ss1Rev1},
want: []string{ss1Rev1.Name, ss1Rev2.Name, ss1Rev3.Name},
},
{
name: "with ties",
revisions: []*apps.ControllerRevision{ss1Rev3, ss1Rev3Time2, ss1Rev2, ss1Rev1},
want: []string{ss1Rev1.Name, ss1Rev2.Name, ss1Rev3.Name, ss1Rev3Time2.Name, ss1Rev3Time2Name2.Name},
},
{
name: "empty",
revisions: nil,