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Merge pull request #110894 from yuanchen8911/prefilter

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Consolidate PreFilter and Filter reason messages for scheduler
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Kubernetes Prow Robot 2022-09-02 16:34:27 -07:00 committed by GitHub
commit 904417b5d3
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4 changed files with 121 additions and 31 deletions
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29
pkg/scheduler/framework/types.go
View File

@ -213,7 +213,9 @@ type WeightedAffinityTerm struct {
type Diagnosis struct {
NodeToStatusMap NodeToStatusMap
UnschedulablePlugins sets.String
// PostFilterMsg records the messages returned from PostFilterPlugins.
// PreFilterMsg records the messages returned from PreFilter plugins.
PreFilterMsg string
// PostFilterMsg records the messages returned from PostFilter plugins.
PostFilterMsg string
}
@ -224,10 +226,15 @@ type FitError struct {
Diagnosis Diagnosis
}
// NoNodeAvailableMsg is used to format message when no nodes available.
const NoNodeAvailableMsg = "0/%v nodes are available"
const (
// NoNodeAvailableMsg is used to format message when no nodes available.
NoNodeAvailableMsg = "0/%v nodes are available"
// SeparatorFormat is used to separate PreFilterMsg, FilterMsg and PostFilterMsg.
SeparatorFormat = " %v."
)
// Error returns detailed information of why the pod failed to fit on each node
// Error returns detailed information of why the pod failed to fit on each node.
// A message format is "0/X nodes are available: <PreFilterMsg>. <FilterMsg>. <PostFilterMsg>."
func (f *FitError) Error() string {
reasons := make(map[string]int)
for _, status := range f.Diagnosis.NodeToStatusMap {
@ -236,6 +243,12 @@ func (f *FitError) Error() string {
}
}
reasonMsg := fmt.Sprintf(NoNodeAvailableMsg+":", f.NumAllNodes)
// Add the messages from PreFilter plugins to reasonMsg.
preFilterMsg := f.Diagnosis.PreFilterMsg
if preFilterMsg != "" {
reasonMsg += fmt.Sprintf(SeparatorFormat, preFilterMsg)
}
sortReasonsHistogram := func() []string {
var reasonStrings []string
for k, v := range reasons {
@ -244,10 +257,14 @@ func (f *FitError) Error() string {
sort.Strings(reasonStrings)
return reasonStrings
}
reasonMsg := fmt.Sprintf(NoNodeAvailableMsg+": %v.", f.NumAllNodes, strings.Join(sortReasonsHistogram(), ", "))
sortedFilterMsg := sortReasonsHistogram()
if len(sortedFilterMsg) != 0 {
reasonMsg += fmt.Sprintf(SeparatorFormat, strings.Join(sortedFilterMsg, ", "))
}
// Add the messages from PostFilter plugins to reasonMsg.
postFilterMsg := f.Diagnosis.PostFilterMsg
if postFilterMsg != "" {
reasonMsg += " " + postFilterMsg
reasonMsg += fmt.Sprintf(SeparatorFormat, postFilterMsg)
}
return reasonMsg
}

85
pkg/scheduler/framework/types_test.go
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@ -1373,3 +1373,88 @@ func TestGetNamespacesFromPodAffinityTerm(t *testing.T) {
})
}
}
func TestFitError_Error(t *testing.T) {
tests := []struct {
name string
pod *v1.Pod
numAllNodes int
diagnosis Diagnosis
wantReasonMsg string
}{
{
name: "nodes failed Prefilter plugin",
numAllNodes: 3,
diagnosis: Diagnosis{
PreFilterMsg: "Node(s) failed PreFilter plugin FalsePreFilter",
},
wantReasonMsg: "0/3 nodes are available: Node(s) failed PreFilter plugin FalsePreFilter.",
},
{
name: "nodes failed one Filter plugin with an empty PostFilterMsg",
numAllNodes: 3,
diagnosis: Diagnosis{
PreFilterMsg: "",
NodeToStatusMap: NodeToStatusMap{
"node1": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
"node2": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
"node3": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
},
},
wantReasonMsg: "0/3 nodes are available: 3 Node(s) failed Filter plugin FalseFilter-1.",
},
{
name: "nodes failed one Filter plugin with a non-empty PostFilterMsg",
numAllNodes: 3,
diagnosis: Diagnosis{
PreFilterMsg: "",
NodeToStatusMap: NodeToStatusMap{
"node1": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
"node2": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
"node3": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
},
PostFilterMsg: "Error running PostFilter plugin FailedPostFilter",
},
wantReasonMsg: "0/3 nodes are available: 3 Node(s) failed Filter plugin FalseFilter-1. Error running PostFilter plugin FailedPostFilter.",
},
{
name: "nodes failed two Filter plugins with an empty PostFilterMsg",
numAllNodes: 3,
diagnosis: Diagnosis{
PreFilterMsg: "",
NodeToStatusMap: NodeToStatusMap{
"node1": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
"node2": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
"node3": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-2"),
},
},
wantReasonMsg: "0/3 nodes are available: 1 Node(s) failed Filter plugin FalseFilter-2, 2 Node(s) failed Filter plugin FalseFilter-1.",
},
{
name: "nodes failed two Filter plugins with a non-empty PostFilterMsg",
numAllNodes: 3,
diagnosis: Diagnosis{
PreFilterMsg: "",
NodeToStatusMap: NodeToStatusMap{
"node1": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
"node2": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-1"),
"node3": NewStatus(Unschedulable, "Node(s) failed Filter plugin FalseFilter-2"),
},
PostFilterMsg: "Error running PostFilter plugin FailedPostFilter",
},
wantReasonMsg: "0/3 nodes are available: 1 Node(s) failed Filter plugin FalseFilter-2, 2 Node(s) failed Filter plugin FalseFilter-1. Error running PostFilter plugin FailedPostFilter.",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
f := &FitError{
Pod: tt.pod,
NumAllNodes: tt.numAllNodes,
Diagnosis: tt.diagnosis,
}
if gotReasonMsg := f.Error(); gotReasonMsg != tt.wantReasonMsg {
t.Errorf("Error() = Got: %v Want: %v", gotReasonMsg, tt.wantReasonMsg)
}
})
}
}

8
pkg/scheduler/schedule_one.go
View File

@ -398,11 +398,9 @@ func (sched *Scheduler) findNodesThatFitPod(ctx context.Context, fwk framework.F
if !s.IsUnschedulable() {
return nil, diagnosis, s.AsError()
}
// All nodes will have the same status. Some non trivial refactoring is
// needed to avoid this copy.
for _, n := range allNodes {
diagnosis.NodeToStatusMap[n.Node().Name] = s
}
// Record the messages from PreFilter in Diagnosis.PreFilterMsg.
diagnosis.PreFilterMsg = s.Message()
klog.V(5).InfoS("Status after running PreFilter plugins for pod", "pod", klog.KObj(pod), "status", s)
// Status satisfying IsUnschedulable() gets injected into diagnosis.UnschedulablePlugins.
if s.FailedPlugin() != "" {
diagnosis.UnschedulablePlugins.Insert(s.FailedPlugin())

30
pkg/scheduler/schedule_one_test.go
View File

@ -1694,10 +1694,8 @@ func TestSchedulerSchedulePod(t *testing.T) {
Pod: st.MakePod().Name("ignore").UID("ignore").PVC("unknownPVC").Obj(),
NumAllNodes: 2,
Diagnosis: framework.Diagnosis{
NodeToStatusMap: framework.NodeToStatusMap{
"node1": framework.NewStatus(framework.UnschedulableAndUnresolvable, `persistentvolumeclaim "unknownPVC" not found`).WithFailedPlugin(volumebinding.Name),
"node2": framework.NewStatus(framework.UnschedulableAndUnresolvable, `persistentvolumeclaim "unknownPVC" not found`).WithFailedPlugin(volumebinding.Name),
},
NodeToStatusMap: framework.NodeToStatusMap{},
PreFilterMsg: `persistentvolumeclaim "unknownPVC" not found`,
UnschedulablePlugins: sets.NewString(volumebinding.Name),
},
},
@ -1718,10 +1716,8 @@ func TestSchedulerSchedulePod(t *testing.T) {
Pod: st.MakePod().Name("ignore").UID("ignore").Namespace(v1.NamespaceDefault).PVC("existingPVC").Obj(),
NumAllNodes: 2,
Diagnosis: framework.Diagnosis{
NodeToStatusMap: framework.NodeToStatusMap{
"node1": framework.NewStatus(framework.UnschedulableAndUnresolvable, `persistentvolumeclaim "existingPVC" is being deleted`).WithFailedPlugin(volumebinding.Name),
"node2": framework.NewStatus(framework.UnschedulableAndUnresolvable, `persistentvolumeclaim "existingPVC" is being deleted`).WithFailedPlugin(volumebinding.Name),
},
NodeToStatusMap: framework.NodeToStatusMap{},
PreFilterMsg: `persistentvolumeclaim "existingPVC" is being deleted`,
UnschedulablePlugins: sets.NewString(volumebinding.Name),
},
},
@ -1878,10 +1874,8 @@ func TestSchedulerSchedulePod(t *testing.T) {
Pod: st.MakePod().Name("test-prefilter").UID("test-prefilter").Obj(),
NumAllNodes: 2,
Diagnosis: framework.Diagnosis{
NodeToStatusMap: framework.NodeToStatusMap{
"1": framework.NewStatus(framework.UnschedulableAndUnresolvable, "injected unschedulable status").WithFailedPlugin("FakePreFilter"),
"2": framework.NewStatus(framework.UnschedulableAndUnresolvable, "injected unschedulable status").WithFailedPlugin("FakePreFilter"),
},
NodeToStatusMap: framework.NodeToStatusMap{},
PreFilterMsg: "injected unschedulable status",
UnschedulablePlugins: sets.NewString("FakePreFilter"),
},
},
@ -1948,12 +1942,9 @@ func TestSchedulerSchedulePod(t *testing.T) {
Pod: st.MakePod().Name("test-prefilter").UID("test-prefilter").Obj(),
NumAllNodes: 3,
Diagnosis: framework.Diagnosis{
NodeToStatusMap: framework.NodeToStatusMap{
"node1": framework.NewStatus(framework.Unschedulable, "node(s) didn't satisfy plugin(s) [FakePreFilter2 FakePreFilter3] simultaneously"),
"node2": framework.NewStatus(framework.Unschedulable, "node(s) didn't satisfy plugin(s) [FakePreFilter2 FakePreFilter3] simultaneously"),
"node3": framework.NewStatus(framework.Unschedulable, "node(s) didn't satisfy plugin(s) [FakePreFilter2 FakePreFilter3] simultaneously"),
},
NodeToStatusMap: framework.NodeToStatusMap{},
UnschedulablePlugins: sets.String{},
PreFilterMsg: "node(s) didn't satisfy plugin(s) [FakePreFilter2 FakePreFilter3] simultaneously",
},
},
},
@ -1977,10 +1968,9 @@ func TestSchedulerSchedulePod(t *testing.T) {
Pod: st.MakePod().Name("test-prefilter").UID("test-prefilter").Obj(),
NumAllNodes: 1,
Diagnosis: framework.Diagnosis{
NodeToStatusMap: framework.NodeToStatusMap{
"node1": framework.NewStatus(framework.Unschedulable, "node(s) didn't satisfy plugin FakePreFilter2"),
},
NodeToStatusMap: framework.NodeToStatusMap{},
UnschedulablePlugins: sets.String{},
PreFilterMsg: "node(s) didn't satisfy plugin FakePreFilter2",
},
},
},