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Merge pull request #92579 from chendave/preemption_topology

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Change the exception to avoid the cost of preemption
This commit is contained in:
Kubernetes Prow Robot 2020-07-02 23:24:47 -07:00 committed by GitHub
commit d7e364ad0f
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4 changed files with 131 additions and 94 deletions
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11
pkg/scheduler/framework/plugins/defaultpreemption/default_preemption_test.go
View File

@ -958,7 +958,7 @@ func TestNodesWherePreemptionMightHelp(t *testing.T) {
expected: map[string]bool{"node4": true},
},
{
name: "ErrTopologySpreadConstraintsNotMatch should be tried as it indicates that the pod is unschedulable due to topology spread constraints",
name: "ErrReasonConstraintsNotMatch should be tried as it indicates that the pod is unschedulable due to topology spread constraints",
nodesStatuses: framework.NodeToStatusMap{
"node1": framework.NewStatus(framework.Unschedulable, podtopologyspread.ErrReasonConstraintsNotMatch),
"node2": framework.NewStatus(framework.UnschedulableAndUnresolvable, nodename.ErrReason),
@ -975,6 +975,15 @@ func TestNodesWherePreemptionMightHelp(t *testing.T) {
},
expected: map[string]bool{"node1": true, "node3": true},
},
{
name: "ErrReasonNodeLabelNotMatch should not be tried as it indicates that the pod is unschedulable due to node doesn't have the required label",
nodesStatuses: framework.NodeToStatusMap{
"node2": framework.NewStatus(framework.UnschedulableAndUnresolvable, podtopologyspread.ErrReasonNodeLabelNotMatch),
"node3": framework.NewStatus(framework.Unschedulable, ""),
"node4": framework.NewStatus(framework.UnschedulableAndUnresolvable, ""),
},
expected: map[string]bool{"node1": true, "node3": true},
},
}
for _, tt := range tests {

2
pkg/scheduler/framework/plugins/podtopologyspread/filtering.go
View File

@ -295,7 +295,7 @@ func (pl *PodTopologySpread) Filter(ctx context.Context, cycleState *framework.C
tpVal, ok := node.Labels[c.TopologyKey]
if !ok {
klog.V(5).Infof("node '%s' doesn't have required label '%s'", node.Name, tpKey)
return framework.NewStatus(framework.Unschedulable, ErrReasonConstraintsNotMatch)
return framework.NewStatus(framework.UnschedulableAndUnresolvable, ErrReasonNodeLabelNotMatch)
}
selfMatchNum := int32(0)

210
pkg/scheduler/framework/plugins/podtopologyspread/filtering_test.go
View File

@ -1145,11 +1145,11 @@ func mustConvertLabelSelectorAsSelector(t *testing.T, ls *metav1.LabelSelector)
func TestSingleConstraint(t *testing.T) {
tests := []struct {
name string
pod *v1.Pod
nodes []*v1.Node
existingPods []*v1.Pod
fits map[string]bool
name string
pod *v1.Pod
nodes []*v1.Node
existingPods []*v1.Pod
wantStatusCode map[string]framework.Code
}{
{
name: "no existing pods",
@ -1162,11 +1162,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakeNode().Name("node-x").Label("zone", "zone2").Label("node", "node-x").Obj(),
st.MakeNode().Name("node-y").Label("zone", "zone2").Label("node", "node-y").Obj(),
},
fits: map[string]bool{
"node-a": true,
"node-b": true,
"node-x": true,
"node-y": true,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Success,
"node-b": framework.Success,
"node-x": framework.Success,
"node-y": framework.Success,
},
},
{
@ -1180,11 +1180,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakeNode().Name("node-x").Label("zone", "zone2").Label("node", "node-x").Obj(),
st.MakeNode().Name("node-y").Label("zone", "zone2").Label("node", "node-y").Obj(),
},
fits: map[string]bool{
"node-a": true,
"node-b": true,
"node-x": true,
"node-y": true,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Success,
"node-b": framework.Success,
"node-x": framework.Success,
"node-y": framework.Success,
},
},
{
@ -1204,11 +1204,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakePod().Name("p-x1").Node("node-x").Label("foo", "").Obj(),
st.MakePod().Name("p-y1").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": true,
"node-b": true,
"node-x": false,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Success,
"node-b": framework.Success,
"node-x": framework.Unschedulable,
"node-y": framework.Unschedulable,
},
},
{
@ -1230,11 +1230,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakePod().Name("p-y2").Node("node-y").Label("foo", "").Obj(),
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": true,
"node-b": true,
"node-x": true,
"node-y": true,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Success,
"node-b": framework.Success,
"node-x": framework.Success,
"node-y": framework.Success,
},
},
{
@ -1256,11 +1256,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakePod().Name("p-x1").Node("node-x").Label("foo", "").Obj(),
st.MakePod().Name("p-y1").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": true,
"node-b": false,
"node-x": false,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Success,
"node-b": framework.UnschedulableAndUnresolvable,
"node-x": framework.Unschedulable,
"node-y": framework.Unschedulable,
},
},
{
@ -1282,11 +1282,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakePod().Name("p-y2").Node("node-y").Label("foo", "").Obj(),
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": false,
"node-b": false,
"node-x": true,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Unschedulable,
"node-x": framework.Success,
"node-y": framework.Unschedulable,
},
},
{
@ -1308,11 +1308,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakePod().Name("p-y2").Node("node-y").Label("foo", "").Obj(),
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": false,
"node-b": true,
"node-x": true,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Success,
"node-x": framework.Success,
"node-y": framework.Unschedulable,
},
},
{
@ -1338,11 +1338,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakePod().Name("p-y2").Node("node-y").Label("foo", "").Obj(),
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": false,
"node-b": true,
"node-x": true,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Success,
"node-x": framework.Success,
"node-y": framework.Unschedulable,
},
},
{
@ -1370,11 +1370,11 @@ func TestSingleConstraint(t *testing.T) {
st.MakePod().Name("p-y2").Node("node-y").Label("foo", "").Obj(),
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": true,
"node-b": true, // in real case, it's false
"node-x": true, // in real case, it's false
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Success,
"node-b": framework.Success, // in real case, it's false
"node-x": framework.Success, // in real case, it's false
"node-y": framework.Unschedulable,
},
},
{
@ -1390,9 +1390,9 @@ func TestSingleConstraint(t *testing.T) {
st.MakePod().Name("p-a").Node("node-a").Label("foo", "").Terminating().Obj(),
st.MakePod().Name("p-b").Node("node-b").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": true,
"node-b": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Success,
"node-b": framework.Unschedulable,
},
},
}
@ -1409,8 +1409,8 @@ func TestSingleConstraint(t *testing.T) {
for _, node := range tt.nodes {
nodeInfo, _ := snapshot.NodeInfos().Get(node.Name)
status := p.Filter(context.Background(), state, tt.pod, nodeInfo)
if status.IsSuccess() != tt.fits[node.Name] {
t.Errorf("[%s]: expected %v got %v", node.Name, tt.fits[node.Name], status.IsSuccess())
if len(tt.wantStatusCode) != 0 && status.Code() != tt.wantStatusCode[node.Name] {
t.Errorf("[%s]: expected status code %v got %v", node.Name, tt.wantStatusCode[node.Name], status.Code())
}
}
})
@ -1419,11 +1419,11 @@ func TestSingleConstraint(t *testing.T) {
func TestMultipleConstraints(t *testing.T) {
tests := []struct {
name string
pod *v1.Pod
nodes []*v1.Node
existingPods []*v1.Pod
fits map[string]bool
name string
pod *v1.Pod
nodes []*v1.Node
existingPods []*v1.Pod
wantStatusCode map[string]framework.Code
}{
{
// 1. to fulfil "zone" constraint, incoming pod can be placed on any zone (hence any node)
@ -1448,11 +1448,11 @@ func TestMultipleConstraints(t *testing.T) {
st.MakePod().Name("p-y2").Node("node-y").Label("foo", "").Obj(),
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": false,
"node-b": false,
"node-x": true,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Unschedulable,
"node-x": framework.Success,
"node-y": framework.Unschedulable,
},
},
{
@ -1479,11 +1479,11 @@ func TestMultipleConstraints(t *testing.T) {
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
st.MakePod().Name("p-y4").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": false,
"node-b": false,
"node-x": false,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Unschedulable,
"node-x": framework.Unschedulable,
"node-y": framework.Unschedulable,
},
},
{
@ -1505,11 +1505,11 @@ func TestMultipleConstraints(t *testing.T) {
st.MakePod().Name("p-a1").Node("node-a").Label("foo", "").Obj(),
st.MakePod().Name("p-y1").Node("node-y").Label("bar", "").Obj(),
},
fits: map[string]bool{
"node-a": false,
"node-b": false,
"node-x": true,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Unschedulable,
"node-x": framework.Success,
"node-y": framework.Unschedulable,
},
},
{
@ -1532,11 +1532,11 @@ func TestMultipleConstraints(t *testing.T) {
st.MakePod().Name("p-x1").Node("node-x").Label("bar", "").Obj(),
st.MakePod().Name("p-y1").Node("node-y").Label("bar", "").Obj(),
},
fits: map[string]bool{
"node-a": false,
"node-b": false,
"node-x": false,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Unschedulable,
"node-x": framework.Unschedulable,
"node-y": framework.Unschedulable,
},
},
{
@ -1561,11 +1561,11 @@ func TestMultipleConstraints(t *testing.T) {
st.MakePod().Name("p-y2").Node("node-y").Label("foo", "").Label("bar", "").Obj(),
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
},
fits: map[string]bool{
"node-a": false,
"node-b": true,
"node-x": false,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Success,
"node-x": framework.Unschedulable,
"node-y": framework.Unschedulable,
},
},
{
@ -1588,11 +1588,37 @@ func TestMultipleConstraints(t *testing.T) {
st.MakePod().Name("p-x1").Node("node-x").Label("bar", "").Obj(),
st.MakePod().Name("p-y1").Node("node-y").Label("bar", "").Obj(),
},
fits: map[string]bool{
"node-a": true,
"node-b": true,
"node-x": false,
"node-y": false,
wantStatusCode: map[string]framework.Code{
"node-a": framework.Success,
"node-b": framework.Success,
"node-x": framework.Unschedulable,
"node-y": framework.Unschedulable,
},
},
{
// 1. to fulfil "zone" constraint, incoming pod can be placed on any zone (hence any node)
// 2. to fulfil "node" constraint, incoming pod can be placed on node-b (node-x doesn't have the required label)
// intersection of (1) and (2) returns node-b
name: "two Constraints on zone and node, absence of label 'node' on node-x, spreads = [1/1, 1/0/0/1]",
pod: st.MakePod().Name("p").Label("foo", "").
SpreadConstraint(1, "zone", v1.DoNotSchedule, st.MakeLabelSelector().Exists("foo").Obj()).
SpreadConstraint(1, "node", v1.DoNotSchedule, st.MakeLabelSelector().Exists("foo").Obj()).
Obj(),
nodes: []*v1.Node{
st.MakeNode().Name("node-a").Label("zone", "zone1").Label("node", "node-a").Obj(),
st.MakeNode().Name("node-b").Label("zone", "zone1").Label("node", "node-b").Obj(),
st.MakeNode().Name("node-x").Label("zone", "zone2").Obj(),
st.MakeNode().Name("node-y").Label("zone", "zone2").Label("node", "node-y").Obj(),
},
existingPods: []*v1.Pod{
st.MakePod().Name("p-a1").Node("node-a").Label("foo", "").Obj(),
st.MakePod().Name("p-y3").Node("node-y").Label("foo", "").Obj(),
},
wantStatusCode: map[string]framework.Code{
"node-a": framework.Unschedulable,
"node-b": framework.Success,
"node-x": framework.UnschedulableAndUnresolvable,
"node-y": framework.Unschedulable,
},
},
}
@ -1609,8 +1635,8 @@ func TestMultipleConstraints(t *testing.T) {
for _, node := range tt.nodes {
nodeInfo, _ := snapshot.NodeInfos().Get(node.Name)
status := p.Filter(context.Background(), state, tt.pod, nodeInfo)
if status.IsSuccess() != tt.fits[node.Name] {
t.Errorf("[%s]: expected %v got %v", node.Name, tt.fits[node.Name], status.IsSuccess())
if len(tt.wantStatusCode) != 0 && status.Code() != tt.wantStatusCode[node.Name] {
t.Errorf("[%s]: expected error code %v got %v", node.Name, tt.wantStatusCode[node.Name], status.Code())
}
}
})

2
pkg/scheduler/framework/plugins/podtopologyspread/plugin.go
View File

@ -31,6 +31,8 @@ import (
const (
// ErrReasonConstraintsNotMatch is used for PodTopologySpread filter error.
ErrReasonConstraintsNotMatch = "node(s) didn't match pod topology spread constraints"
// ErrReasonNodeLabelNotMatch is used when the node doesn't hold the required label.
ErrReasonNodeLabelNotMatch = ErrReasonConstraintsNotMatch + " (missing required label)"
)
// PodTopologySpread is a plugin that ensures pod's topologySpreadConstraints is satisfied.