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Merge pull request #41617 from timothysc/affinity_annotations_flaggate

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Automatic merge from submit-queue (batch tested with PRs 39373, 41585, 41617, 41707, 39958)

Feature-Gate affinity in annotations 

**What this PR does / why we need it**:
Adds back basic flaggated support for alpha Affinity annotations

**Special notes for your reviewer**:
Reconcile function is placed in the lowest common denominator, which in this case is schedulercache, because you can't place flag-gated functions in apimachinery. 

**Release note**:

```
NONE
```

/cc @davidopp
This commit is contained in:
Kubernetes Submit Queue 2017-02-19 13:50:40 -08:00 committed by GitHub
commit 4a75c1b2aa
17 changed files with 2261 additions and 11 deletions
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20
pkg/api/v1/helpers.go
View File

@ -277,6 +277,11 @@ const (
// an object (e.g. secret, config map) before fetching it again from apiserver.
// This annotation can be attached to node.
ObjectTTLAnnotationKey string = "node.alpha.kubernetes.io/ttl"
// AffinityAnnotationKey represents the key of affinity data (json serialized)
// in the Annotations of a Pod.
// TODO: remove when alpha support for affinity is removed
AffinityAnnotationKey string = "scheduler.alpha.kubernetes.io/affinity"
)
// GetTolerationsFromPodAnnotations gets the json serialized tolerations data from Pod.Annotations
@ -646,3 +651,18 @@ func RemoveTaint(node *Node, taint *Taint) (*Node, bool, error) {
}
return newNode, true, nil
}
// GetAffinityFromPodAnnotations gets the json serialized affinity data from Pod.Annotations
// and converts it to the Affinity type in api.
// TODO: remove when alpha support for affinity is removed
func GetAffinityFromPodAnnotations(annotations map[string]string) (*Affinity, error) {
if len(annotations) > 0 && annotations[AffinityAnnotationKey] != "" {
var affinity Affinity
err := json.Unmarshal([]byte(annotations[AffinityAnnotationKey]), &affinity)
if err != nil {
return nil, err
}
return &affinity, nil
}
return nil, nil
}

57
pkg/api/v1/helpers_test.go
View File

@ -644,3 +644,60 @@ func TestSysctlsFromPodAnnotation(t *testing.T) {
}
}
}
// TODO: remove when alpha support for affinity is removed
func TestGetAffinityFromPodAnnotations(t *testing.T) {
testCases := []struct {
pod *Pod
expectErr bool
}{
{
pod: &Pod{},
expectErr: false,
},
{
pod: &Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
AffinityAnnotationKey: `
{"nodeAffinity": { "requiredDuringSchedulingIgnoredDuringExecution": {
"nodeSelectorTerms": [{
"matchExpressions": [{
"key": "foo",
"operator": "In",
"values": ["value1", "value2"]
}]
}]
}}}`,
},
},
},
expectErr: false,
},
{
pod: &Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{
AffinityAnnotationKey: `
{"nodeAffinity": { "requiredDuringSchedulingIgnoredDuringExecution": {
"nodeSelectorTerms": [{
"matchExpressions": [{
"key": "foo",
`,
},
},
},
expectErr: true,
},
}
for i, tc := range testCases {
_, err := GetAffinityFromPodAnnotations(tc.pod.Annotations)
if err == nil && tc.expectErr {
t.Errorf("[%v]expected error but got none.", i)
}
if err != nil && !tc.expectErr {
t.Errorf("[%v]did not expect error but got: %v", i, err)
}
}
}

7
pkg/features/kube_features.go
View File

@ -67,7 +67,11 @@ const (
// Note: This feature is not supported for `BestEffort` pods.
ExperimentalCriticalPodAnnotation utilfeature.Feature = "ExperimentalCriticalPodAnnotation"
// Determines if affinity defined in annotations should bep rocessed
// owner: @davidopp
// alpha: v1.6
//
// Determines if affinity defined in annotations should be processed
// TODO: remove when alpha support for affinity is removed
AffinityInAnnotations utilfeature.Feature = "AffinityInAnnotations"
)
@ -85,6 +89,7 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
DynamicVolumeProvisioning: {Default: true, PreRelease: utilfeature.Alpha},
ExperimentalHostUserNamespaceDefaultingGate: {Default: false, PreRelease: utilfeature.Beta},
ExperimentalCriticalPodAnnotation: {Default: false, PreRelease: utilfeature.Alpha},
AffinityInAnnotations: {Default: false, PreRelease: utilfeature.Alpha},
// inherited features from generic apiserver, relisted here to get a conflict if it is changed
// unintentionally on either side:

1
plugin/pkg/scheduler/algorithm/predicates/BUILD
View File

@ -47,6 +47,7 @@ go_test(
"//vendor:k8s.io/apimachinery/pkg/api/resource",
"//vendor:k8s.io/apimachinery/pkg/apis/meta/v1",
"//vendor:k8s.io/apimachinery/pkg/labels",
"//vendor:k8s.io/apiserver/pkg/util/feature",
],
)

8
plugin/pkg/scheduler/algorithm/predicates/predicates.go
View File

@ -585,7 +585,7 @@ func podMatchesNodeLabels(pod *v1.Pod, node *v1.Node) bool {
// 5. zero-length non-nil []NodeSelectorRequirement matches no nodes also, just for simplicity
// 6. non-nil empty NodeSelectorRequirement is not allowed
nodeAffinityMatches := true
affinity := pod.Spec.Affinity
affinity := schedulercache.ReconcileAffinity(pod)
if affinity != nil && affinity.NodeAffinity != nil {
nodeAffinity := affinity.NodeAffinity
// if no required NodeAffinity requirements, will do no-op, means select all nodes.
@ -897,7 +897,7 @@ func (c *PodAffinityChecker) InterPodAffinityMatches(pod *v1.Pod, meta interface
}
// Now check if <pod> requirements will be satisfied on this node.
affinity := pod.Spec.Affinity
affinity := schedulercache.ReconcileAffinity(pod)
if affinity == nil || (affinity.PodAffinity == nil && affinity.PodAntiAffinity == nil) {
return true, nil, nil
}
@ -1001,7 +1001,7 @@ func getMatchingAntiAffinityTerms(pod *v1.Pod, nodeInfoMap map[string]*scheduler
}
var nodeResult []matchingPodAntiAffinityTerm
for _, existingPod := range nodeInfo.PodsWithAffinity() {
affinity := existingPod.Spec.Affinity
affinity := schedulercache.ReconcileAffinity(existingPod)
if affinity == nil {
continue
}
@ -1029,7 +1029,7 @@ func getMatchingAntiAffinityTerms(pod *v1.Pod, nodeInfoMap map[string]*scheduler
func (c *PodAffinityChecker) getMatchingAntiAffinityTerms(pod *v1.Pod, allPods []*v1.Pod) ([]matchingPodAntiAffinityTerm, error) {
var result []matchingPodAntiAffinityTerm
for _, existingPod := range allPods {
affinity := existingPod.Spec.Affinity
affinity := schedulercache.ReconcileAffinity(existingPod)
if affinity != nil && affinity.PodAntiAffinity != nil {
existingPodNode, err := c.info.GetNodeInfo(existingPod.Spec.NodeName)
if err != nil {

1240
plugin/pkg/scheduler/algorithm/predicates/predicates_test.go
View File

File diff suppressed because it is too large Load Diff

1
plugin/pkg/scheduler/algorithm/priorities/BUILD
View File

@ -67,6 +67,7 @@ go_test(
"//plugin/pkg/scheduler/schedulercache:go_default_library",
"//vendor:k8s.io/apimachinery/pkg/api/resource",
"//vendor:k8s.io/apimachinery/pkg/apis/meta/v1",
"//vendor:k8s.io/apiserver/pkg/util/feature",
],
)

4
plugin/pkg/scheduler/algorithm/priorities/interpod_affinity.go
View File

@ -116,7 +116,7 @@ func (p *podAffinityPriorityMap) processTerms(terms []v1.WeightedPodAffinityTerm
// Symmetry need to be considered for preferredDuringSchedulingIgnoredDuringExecution from podAffinity & podAntiAffinity,
// symmetry need to be considered for hard requirements from podAffinity
func (ipa *InterPodAffinity) CalculateInterPodAffinityPriority(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.NodeInfo, nodes []*v1.Node) (schedulerapi.HostPriorityList, error) {
affinity := pod.Spec.Affinity
affinity := schedulercache.ReconcileAffinity(pod)
hasAffinityConstraints := affinity != nil && affinity.PodAffinity != nil
hasAntiAffinityConstraints := affinity != nil && affinity.PodAntiAffinity != nil
@ -137,7 +137,7 @@ func (ipa *InterPodAffinity) CalculateInterPodAffinityPriority(pod *v1.Pod, node
if err != nil {
return err
}
existingPodAffinity := existingPod.Spec.Affinity
existingPodAffinity := schedulercache.ReconcileAffinity(existingPod)
existingHasAffinityConstraints := existingPodAffinity != nil && existingPodAffinity.PodAffinity != nil
existingHasAntiAffinityConstraints := existingPodAffinity != nil && existingPodAffinity.PodAntiAffinity != nil

565
plugin/pkg/scheduler/algorithm/priorities/interpod_affinity_test.go
View File

@ -22,6 +22,7 @@ import (
"testing"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/plugin/pkg/scheduler/algorithm"
schedulerapi "k8s.io/kubernetes/plugin/pkg/scheduler/api"
@ -613,3 +614,567 @@ func TestHardPodAffinitySymmetricWeight(t *testing.T) {
}
}
}
// TODO: remove when alpha support for affinity is removed
func TestInterPodAffinityAnnotationsPriority(t *testing.T) {
utilfeature.DefaultFeatureGate.Set("AffinityInAnnotations=true")
labelRgChina := map[string]string{
"region": "China",
}
labelRgIndia := map[string]string{
"region": "India",
}
labelAzAz1 := map[string]string{
"az": "az1",
}
labelAzAz2 := map[string]string{
"az": "az2",
}
labelRgChinaAzAz1 := map[string]string{
"region": "China",
"az": "az1",
}
podLabelSecurityS1 := map[string]string{
"security": "S1",
}
podLabelSecurityS2 := map[string]string{
"security": "S2",
}
// considered only preferredDuringSchedulingIgnoredDuringExecution in pod affinity
stayWithS1InRegion := map[string]string{
v1.AffinityAnnotationKey: `
{"podAffinity": {
"preferredDuringSchedulingIgnoredDuringExecution": [{
"weight": 5,
"podAffinityTerm": {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "In",
"values":["S1"]
}]
},
"namespaces": [],
"topologyKey": "region"
}
}]
}}`,
}
stayWithS2InRegion := map[string]string{
v1.AffinityAnnotationKey: `
{"podAffinity": {
"preferredDuringSchedulingIgnoredDuringExecution": [{
"weight": 6,
"podAffinityTerm": {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "In",
"values":["S2"]
}]
},
"namespaces": [],
"topologyKey": "region"
}
}]
}}`,
}
affinity3 := map[string]string{
v1.AffinityAnnotationKey: `
{"podAffinity": {
"preferredDuringSchedulingIgnoredDuringExecution": [
{
"weight": 8,
"podAffinityTerm": {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "NotIn",
"values":["S1"]
}, {
"key": "security",
"operator": "In",
"values":["S2"]
}]
},
"namespaces": [],
"topologyKey": "region"
}
}, {
"weight": 2,
"podAffinityTerm": {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "Exists"
}, {
"key": "wrongkey",
"operator": "DoesNotExist"
}]
},
"namespaces": [],
"topologyKey": "region"
}
}
]
}}`,
}
hardAffinity := map[string]string{
v1.AffinityAnnotationKey: `
{"podAffinity": {
"requiredDuringSchedulingIgnoredDuringExecution": [
{
"labelSelector":{
"matchExpressions": [{
"key": "security",
"operator": "In",
"values": ["S1", "value2"]
}]
},
"namespaces": [],
"topologyKey": "region"
}, {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "Exists"
}, {
"key": "wrongkey",
"operator": "DoesNotExist"
}]
},
"namespaces": [],
"topologyKey": "region"
}
]
}}`,
}
awayFromS1InAz := map[string]string{
v1.AffinityAnnotationKey: `
{"podAntiAffinity": {
"preferredDuringSchedulingIgnoredDuringExecution": [{
"weight": 5,
"podAffinityTerm": {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "In",
"values":["S1"]
}]
},
"namespaces": [],
"topologyKey": "az"
}
}]
}}`,
}
// to stay away from security S2 in any az.
awayFromS2InAz := map[string]string{
v1.AffinityAnnotationKey: `
{"podAntiAffinity": {
"preferredDuringSchedulingIgnoredDuringExecution": [{
"weight": 5,
"podAffinityTerm": {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "In",
"values":["S2"]
}]
},
"namespaces": [],
"topologyKey": "az"
}
}]
}}`,
}
// to stay with security S1 in same region, stay away from security S2 in any az.
stayWithS1InRegionAwayFromS2InAz := map[string]string{
v1.AffinityAnnotationKey: `
{"podAffinity": {
"preferredDuringSchedulingIgnoredDuringExecution": [{
"weight": 8,
"podAffinityTerm": {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "In",
"values":["S1"]
}]
},
"namespaces": [],
"topologyKey": "region"
}
}]
},
"podAntiAffinity": {
"preferredDuringSchedulingIgnoredDuringExecution": [{
"weight": 5,
"podAffinityTerm": {
"labelSelector": {
"matchExpressions": [{
"key": "security",
"operator": "In",
"values":["S2"]
}]
},
"namespaces": [],
"topologyKey": "az"
}
}]
}}`,
}
tests := []struct {
pod *v1.Pod
pods []*v1.Pod
nodes []*v1.Node
expectedList schedulerapi.HostPriorityList
test string
}{
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: map[string]string{}}},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
test: "all machines are same priority as Affinity is nil",
},
// the node(machine1) that have the label {"region": "China"} (match the topology key) and that have existing pods that match the labelSelector get high score
// the node(machine3) that don't have the label {"region": "whatever the value is"} (mismatch the topology key) but that have existing pods that match the labelSelector get low score
// the node(machine2) that have the label {"region": "China"} (match the topology key) but that have existing pods that mismatch the labelSelector get low score
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: stayWithS1InRegion}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
test: "Affinity: pod that matches topology key & pods in nodes will get high score comparing to others" +
"which doesn't match either pods in nodes or in topology key",
},
// the node1(machine1) that have the label {"region": "China"} (match the topology key) and that have existing pods that match the labelSelector get high score
// the node2(machine2) that have the label {"region": "China"}, match the topology key and have the same label value with node1, get the same high score with node1
// the node3(machine3) that have the label {"region": "India"}, match the topology key but have a different label value, don't have existing pods that match the labelSelector,
// get a low score.
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Annotations: stayWithS1InRegion}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgChinaAzAz1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelRgIndia}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 10}, {Host: "machine3", Score: 0}},
test: "All the nodes that have the same topology key & label value with one of them has an existing pod that match the affinity rules, have the same score",
},
// there are 2 regions, say regionChina(machine1,machine3,machine4) and regionIndia(machine2,machine5), both regions have nodes that match the preference.
// But there are more nodes(actually more existing pods) in regionChina that match the preference than regionIndia.
// Then, nodes in regionChina get higher score than nodes in regionIndia, and all the nodes in regionChina should get a same score(high score),
// while all the nodes in regionIndia should get another same score(low score).
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: stayWithS2InRegion}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
{Spec: v1.PodSpec{NodeName: "machine4"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
{Spec: v1.PodSpec{NodeName: "machine5"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine4", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine5", Labels: labelRgIndia}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 5}, {Host: "machine3", Score: 10}, {Host: "machine4", Score: 10}, {Host: "machine5", Score: 5}},
test: "Affinity: nodes in one region has more matching pods comparing to other reqion, so the region which has more macthes will get high score",
},
// Test with the different operators and values for pod affinity scheduling preference, including some match failures.
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: affinity3}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 2}, {Host: "machine2", Score: 10}, {Host: "machine3", Score: 0}},
test: "Affinity: different Label operators and values for pod affinity scheduling preference, including some match failures ",
},
// Test the symmetry cases for affinity, the difference between affinity and symmetry is not the pod wants to run together with some existing pods,
// but the existing pods have the inter pod affinity preference while the pod to schedule satisfy the preference.
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: stayWithS1InRegion}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2, Annotations: stayWithS2InRegion}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 10}, {Host: "machine3", Score: 0}},
test: "Affinity symmetry: considred only the preferredDuringSchedulingIgnoredDuringExecution in pod affinity symmetry",
},
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: hardAffinity}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2, Annotations: hardAffinity}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 10}, {Host: "machine3", Score: 0}},
test: "Affinity symmetry: considred RequiredDuringSchedulingIgnoredDuringExecution in pod affinity symmetry",
},
// The pod to schedule prefer to stay away from some existing pods at node level using the pod anti affinity.
// the nodes that have the label {"node": "bar"} (match the topology key) and that have existing pods that match the labelSelector get low score
// the nodes that don't have the label {"node": "whatever the value is"} (mismatch the topology key) but that have existing pods that match the labelSelector get high score
// the nodes that have the label {"node": "bar"} (match the topology key) but that have existing pods that mismatch the labelSelector get high score
// there are 2 nodes, say node1 and node2, both nodes have pods that match the labelSelector and have topology-key in node.Labels.
// But there are more pods on node1 that match the preference than node2. Then, node1 get a lower score than node2.
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: awayFromS1InAz}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelAzAz1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgChina}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 10}},
test: "Anti Affinity: pod that doesnot match existing pods in node will get high score ",
},
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: awayFromS1InAz}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelAzAz1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgChina}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 10}},
test: "Anti Affinity: pod that does not matches topology key & matches the pods in nodes will get higher score comparing to others ",
},
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: awayFromS1InAz}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelAzAz1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 10}},
test: "Anti Affinity: one node has more matching pods comparing to other node, so the node which has more unmacthes will get high score",
},
// Test the symmetry cases for anti affinity
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: awayFromS2InAz}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2, Annotations: awayFromS1InAz}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelAzAz1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelAzAz2}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 10}},
test: "Anti Affinity symmetry: the existing pods in node which has anti affinity match will get high score",
},
// Test both affinity and anti-affinity
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: stayWithS1InRegionAwayFromS2InAz}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelAzAz1}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 0}},
test: "Affinity and Anti Affinity: considered only preferredDuringSchedulingIgnoredDuringExecution in both pod affinity & anti affinity",
},
// Combined cases considering both affinity and anti-affinity, the pod to schedule and existing pods have the same labels (they are in the same RC/service),
// the pod prefer to run together with its brother pods in the same region, but wants to stay away from them at node level,
// so that all the pods of a RC/service can stay in a same region but trying to separate with each other
// machine-1,machine-3,machine-4 are in ChinaRegion others machin-2,machine-5 are in IndiaRegion
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: stayWithS1InRegionAwayFromS2InAz}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine4"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine5"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChinaAzAz1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine4", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine5", Labels: labelRgIndia}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 4}, {Host: "machine3", Score: 10}, {Host: "machine4", Score: 10}, {Host: "machine5", Score: 4}},
test: "Affinity and Anti Affinity: considering both affinity and anti-affinity, the pod to schedule and existing pods have the same labels",
},
// Consider Affinity, Anti Affinity and symmetry together.
// for Affinity, the weights are: 8, 0, 0, 0
// for Anti Affinity, the weights are: 0, -5, 0, 0
// for Affinity symmetry, the weights are: 0, 0, 8, 0
// for Anti Affinity symmetry, the weights are: 0, 0, 0, -5
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1, Annotations: stayWithS1InRegionAwayFromS2InAz}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS1}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelSecurityS2}},
{Spec: v1.PodSpec{NodeName: "machine3"}, ObjectMeta: metav1.ObjectMeta{Annotations: stayWithS1InRegionAwayFromS2InAz}},
{Spec: v1.PodSpec{NodeName: "machine4"}, ObjectMeta: metav1.ObjectMeta{Annotations: awayFromS1InAz}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelAzAz1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine4", Labels: labelAzAz2}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 10}, {Host: "machine4", Score: 0}},
test: "Affinity and Anti Affinity and symmetry: considered only preferredDuringSchedulingIgnoredDuringExecution in both pod affinity & anti affinity & symmetry",
},
}
for _, test := range tests {
nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, test.nodes)
interPodAffinity := InterPodAffinity{
info: FakeNodeListInfo(test.nodes),
nodeLister: algorithm.FakeNodeLister(test.nodes),
podLister: algorithm.FakePodLister(test.pods),
hardPodAffinityWeight: v1.DefaultHardPodAffinitySymmetricWeight,
}
list, err := interPodAffinity.CalculateInterPodAffinityPriority(test.pod, nodeNameToInfo, test.nodes)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if !reflect.DeepEqual(test.expectedList, list) {
t.Errorf("%s: \nexpected \n\t%#v, \ngot \n\t%#v\n", test.test, test.expectedList, list)
}
}
}
// TODO: remove when alpha support for affinity is removed
func TestHardPodAffinityAnnotationsSymmetricWeight(t *testing.T) {
utilfeature.DefaultFeatureGate.Set("AffinityInAnnotations=true")
podLabelServiceS1 := map[string]string{
"service": "S1",
}
labelRgChina := map[string]string{
"region": "China",
}
labelRgIndia := map[string]string{
"region": "India",
}
labelAzAz1 := map[string]string{
"az": "az1",
}
hardPodAffinity := map[string]string{
v1.AffinityAnnotationKey: `
{"podAffinity": {
"requiredDuringSchedulingIgnoredDuringExecution": [
{
"labelSelector":{
"matchExpressions": [{
"key": "service",
"operator": "In",
"values": ["S1"]
}]
},
"namespaces": [],
"topologyKey": "region"
}
]
}}`,
}
tests := []struct {
pod *v1.Pod
pods []*v1.Pod
nodes []*v1.Node
hardPodAffinityWeight int
expectedList schedulerapi.HostPriorityList
test string
}{
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelServiceS1}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Annotations: hardPodAffinity}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Annotations: hardPodAffinity}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
},
hardPodAffinityWeight: v1.DefaultHardPodAffinitySymmetricWeight,
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 10}, {Host: "machine3", Score: 0}},
test: "Hard Pod Affinity symmetry: hard pod affinity symmetry weights 1 by default, then nodes that match the hard pod affinity symmetry rules, get a high score",
},
{
pod: &v1.Pod{Spec: v1.PodSpec{NodeName: ""}, ObjectMeta: metav1.ObjectMeta{Labels: podLabelServiceS1}},
pods: []*v1.Pod{
{Spec: v1.PodSpec{NodeName: "machine1"}, ObjectMeta: metav1.ObjectMeta{Annotations: hardPodAffinity}},
{Spec: v1.PodSpec{NodeName: "machine2"}, ObjectMeta: metav1.ObjectMeta{Annotations: hardPodAffinity}},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: labelRgChina}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: labelRgIndia}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: labelAzAz1}},
},
hardPodAffinityWeight: 0,
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
test: "Hard Pod Affinity symmetry: hard pod affinity symmetry is closed(weights 0), then nodes that match the hard pod affinity symmetry rules, get same score with those not match",
},
}
for _, test := range tests {
nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(test.pods, test.nodes)
ipa := InterPodAffinity{
info: FakeNodeListInfo(test.nodes),
nodeLister: algorithm.FakeNodeLister(test.nodes),
podLister: algorithm.FakePodLister(test.pods),
hardPodAffinityWeight: test.hardPodAffinityWeight,
}
list, err := ipa.CalculateInterPodAffinityPriority(test.pod, nodeNameToInfo, test.nodes)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if !reflect.DeepEqual(test.expectedList, list) {
t.Errorf("%s: \nexpected \n\t%#v, \ngot \n\t%#v\n", test.test, test.expectedList, list)
}
}
}

2
plugin/pkg/scheduler/algorithm/priorities/metadata.go
View File

@ -41,6 +41,6 @@ func PriorityMetadata(pod *v1.Pod, nodeNameToInfo map[string]*schedulercache.Nod
return &priorityMetadata{
nonZeroRequest: getNonZeroRequests(pod),
podTolerations: tolerations,
affinity: pod.Spec.Affinity,
affinity: schedulercache.ReconcileAffinity(pod),
}
}

2
plugin/pkg/scheduler/algorithm/priorities/node_affinity.go
View File

@ -42,7 +42,7 @@ func CalculateNodeAffinityPriorityMap(pod *v1.Pod, meta interface{}, nodeInfo *s
affinity = priorityMeta.affinity
} else {
// We couldn't parse metadata - fallback to the podspec.
affinity = pod.Spec.Affinity
affinity = schedulercache.ReconcileAffinity(pod)
}
var count int32

145
plugin/pkg/scheduler/algorithm/priorities/node_affinity_test.go
View File

@ -21,6 +21,7 @@ import (
"testing"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/kubernetes/pkg/api/v1"
schedulerapi "k8s.io/kubernetes/plugin/pkg/scheduler/api"
"k8s.io/kubernetes/plugin/pkg/scheduler/schedulercache"
@ -177,3 +178,147 @@ func TestNodeAffinityPriority(t *testing.T) {
}
}
}
// TODO: remove when alpha support for affinity is removed
func TestNodeAffinityAnnotationsPriority(t *testing.T) {
utilfeature.DefaultFeatureGate.Set("AffinityInAnnotations=true")
label1 := map[string]string{"foo": "bar"}
label2 := map[string]string{"key": "value"}
label3 := map[string]string{"az": "az1"}
label4 := map[string]string{"abc": "az11", "def": "az22"}
label5 := map[string]string{"foo": "bar", "key": "value", "az": "az1"}
affinity1 := map[string]string{
v1.AffinityAnnotationKey: `
{"nodeAffinity": {"preferredDuringSchedulingIgnoredDuringExecution": [
{
"weight": 2,
"preference": {
"matchExpressions": [
{
"key": "foo",
"operator": "In", "values": ["bar"]
}
]
}
}
]}}`,
}
affinity2 := map[string]string{
v1.AffinityAnnotationKey: `
{"nodeAffinity": {"preferredDuringSchedulingIgnoredDuringExecution": [
{
"weight": 2,
"preference": {"matchExpressions": [
{
"key": "foo",
"operator": "In", "values": ["bar"]
}
]}
},
{
"weight": 4,
"preference": {"matchExpressions": [
{
"key": "key",
"operator": "In", "values": ["value"]
}
]}
},
{
"weight": 5,
"preference": {"matchExpressions": [
{
"key": "foo",
"operator": "In", "values": ["bar"]
},
{
"key": "key",
"operator": "In", "values": ["value"]
},
{
"key": "az",
"operator": "In", "values": ["az1"]
}
]}
}
]}}`,
}
tests := []struct {
pod *v1.Pod
nodes []*v1.Node
expectedList schedulerapi.HostPriorityList
test string
}{
{
pod: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: map[string]string{},
},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
test: "all machines are same priority as NodeAffinity is nil",
},
{
pod: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: affinity1,
},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label4}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 0}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
test: "no machine macthes preferred scheduling requirements in NodeAffinity of pod so all machines' priority is zero",
},
{
pod: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: affinity1,
},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine3", Labels: label3}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 10}, {Host: "machine2", Score: 0}, {Host: "machine3", Score: 0}},
test: "only machine1 matches the preferred scheduling requirements of pod",
},
{
pod: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: affinity2,
},
},
nodes: []*v1.Node{
{ObjectMeta: metav1.ObjectMeta{Name: "machine1", Labels: label1}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine5", Labels: label5}},
{ObjectMeta: metav1.ObjectMeta{Name: "machine2", Labels: label2}},
},
expectedList: []schedulerapi.HostPriority{{Host: "machine1", Score: 1}, {Host: "machine5", Score: 10}, {Host: "machine2", Score: 3}},
test: "all machines matches the preferred scheduling requirements of pod but with different priorities ",
},
}
for _, test := range tests {
nodeNameToInfo := schedulercache.CreateNodeNameToInfoMap(nil, test.nodes)
nap := priorityFunction(CalculateNodeAffinityPriorityMap, CalculateNodeAffinityPriorityReduce)
list, err := nap(test.pod, nodeNameToInfo, test.nodes)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if !reflect.DeepEqual(test.expectedList, list) {
t.Errorf("%s: \nexpected %#v, \ngot %#v", test.test, test.expectedList, list)
}
}
}

9
plugin/pkg/scheduler/schedulercache/BUILD
View File

@ -14,23 +14,29 @@ go_library(
"cache.go",
"interface.go",
"node_info.go",
"reconcile_affinity.go",
"util.go",
],
tags = ["automanaged"],
deps = [
"//pkg/api/v1:go_default_library",
"//pkg/features:go_default_library",
"//plugin/pkg/scheduler/algorithm/priorities/util:go_default_library",
"//vendor:github.com/golang/glog",
"//vendor:k8s.io/apimachinery/pkg/api/resource",
"//vendor:k8s.io/apimachinery/pkg/labels",
"//vendor:k8s.io/apimachinery/pkg/util/wait",
"//vendor:k8s.io/apiserver/pkg/util/feature",
"//vendor:k8s.io/client-go/tools/cache",
],
)
go_test(
name = "go_default_test",
srcs = ["cache_test.go"],
srcs = [
"cache_test.go",
"reconcile_affinity_test.go",
],
library = ":go_default_library",
tags = ["automanaged"],
deps = [
@ -39,6 +45,7 @@ go_test(
"//vendor:k8s.io/apimachinery/pkg/api/resource",
"//vendor:k8s.io/apimachinery/pkg/apis/meta/v1",
"//vendor:k8s.io/apimachinery/pkg/labels",
"//vendor:k8s.io/apiserver/pkg/util/feature",
],
)

2
plugin/pkg/scheduler/schedulercache/node_info.go
View File

@ -217,7 +217,7 @@ func (n *NodeInfo) String() string {
}
func hasPodAffinityConstraints(pod *v1.Pod) bool {
affinity := pod.Spec.Affinity
affinity := ReconcileAffinity(pod)
return affinity != nil && (affinity.PodAffinity != nil || affinity.PodAntiAffinity != nil)
}

53
plugin/pkg/scheduler/schedulercache/reconcile_affinity.go Normal file
View File

@ -0,0 +1,53 @@
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package schedulercache
import (
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/kubernetes/pkg/api/v1"
"k8s.io/kubernetes/pkg/features"
)
// Reconcile api and annotation affinity definitions.
// When alpha affinity feature is not enabled, always take affinity
// from PodSpec.When alpha affinity feature is enabled, if affinity
// is not set in PodSpec, take affinity from annotation.
// When alpha affinity feature is enabled, if affinity is set in PodSpec,
// take node affinity, pod affinity, and pod anti-affinity individually
// using the following rule: take affinity from PodSpec if it is defined,
// otherwise take from annotation if it is defined.
// TODO: remove when alpha support for affinity is removed
func ReconcileAffinity(pod *v1.Pod) *v1.Affinity {
affinity := pod.Spec.Affinity
if utilfeature.DefaultFeatureGate.Enabled(features.AffinityInAnnotations) {
annotationsAffinity, _ := v1.GetAffinityFromPodAnnotations(pod.Annotations)
if affinity == nil && annotationsAffinity != nil {
affinity = annotationsAffinity
} else if annotationsAffinity != nil {
if affinity != nil && affinity.NodeAffinity == nil && annotationsAffinity.NodeAffinity != nil {
affinity.NodeAffinity = annotationsAffinity.NodeAffinity
}
if affinity != nil && affinity.PodAffinity == nil && annotationsAffinity.PodAffinity != nil {
affinity.PodAffinity = annotationsAffinity.PodAffinity
}
if affinity != nil && affinity.PodAntiAffinity == nil && annotationsAffinity.PodAntiAffinity != nil {
affinity.PodAntiAffinity = annotationsAffinity.PodAntiAffinity
}
}
}
return affinity
}

151
plugin/pkg/scheduler/schedulercache/reconcile_affinity_test.go Normal file
View File

@ -0,0 +1,151 @@
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package schedulercache
import (
"fmt"
"reflect"
"testing"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
utilfeature "k8s.io/apiserver/pkg/util/feature"
"k8s.io/kubernetes/pkg/api/v1"
)
// TODO: remove when alpha support for affinity is removed
func TestReconcileAffinity(t *testing.T) {
baseAffinity := &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: &v1.NodeSelector{
NodeSelectorTerms: []v1.NodeSelectorTerm{
{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: "foo",
Operator: v1.NodeSelectorOpIn,
Values: []string{"bar", "value2"},
},
},
},
},
},
},
PodAffinity: &v1.PodAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
{
LabelSelector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Key: "security",
Operator: metav1.LabelSelectorOpDoesNotExist,
Values: []string{"securityscan"},
},
},
},
TopologyKey: "topologyKey1",
},
},
},
PodAntiAffinity: &v1.PodAntiAffinity{
RequiredDuringSchedulingIgnoredDuringExecution: []v1.PodAffinityTerm{
{
LabelSelector: &metav1.LabelSelector{
MatchExpressions: []metav1.LabelSelectorRequirement{
{
Key: "service",
Operator: metav1.LabelSelectorOpIn,
Values: []string{"S1", "value2"},
},
},
},
TopologyKey: "topologyKey2",
Namespaces: []string{"ns1"},
},
},
},
}
nodeAffinityAnnotation := map[string]string{
v1.AffinityAnnotationKey: `
{"nodeAffinity": {"preferredDuringSchedulingIgnoredDuringExecution": [
{
"weight": 2,
"preference": {"matchExpressions": [
{
"key": "foo",
"operator": "In", "values": ["bar"]
}
]}
}
]}}`,
}
testCases := []struct {
pod *v1.Pod
expected *v1.Affinity
annotationsEnabled bool
}{
{
// affinity is set in both PodSpec and annotations; take from PodSpec.
pod: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: nodeAffinityAnnotation,
},
Spec: v1.PodSpec{
Affinity: baseAffinity,
},
},
expected: baseAffinity,
annotationsEnabled: true,
},
{
// affinity is only set in annotation; take from annotation.
pod: &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Annotations: nodeAffinityAnnotation,
},
},
expected: &v1.Affinity{
NodeAffinity: &v1.NodeAffinity{
PreferredDuringSchedulingIgnoredDuringExecution: []v1.PreferredSchedulingTerm{
{
Weight: 2,
Preference: v1.NodeSelectorTerm{
MatchExpressions: []v1.NodeSelectorRequirement{
{
Key: "foo",
Operator: v1.NodeSelectorOpIn,
Values: []string{"bar"},
},
},
},
},
},
},
},
annotationsEnabled: true,
},
}
for i, tc := range testCases {
utilfeature.DefaultFeatureGate.Set(fmt.Sprintf("AffinityInAnnotations=%t", tc.annotationsEnabled))
affinity := ReconcileAffinity(tc.pod)
if !reflect.DeepEqual(affinity, tc.expected) {
t.Errorf("[%v] Did not get expected affinity:\n\n%v\n\n. got:\n\n %v", i, tc.expected, affinity)
}
}
}

5
staging/src/k8s.io/apiserver/pkg/util/feature/feature_gate.go
View File

@ -107,6 +107,11 @@ type FeatureGate interface {
// owner: @pweil-
// alpha: v1.5
ExperimentalHostUserNamespaceDefaulting() bool
// owner: @davidopp
// alpha: v1.6
// TODO: remove when alpha support for affinity is removed
AffinityInAnnotations() bool
}
// featureGate implements FeatureGate as well as pflag.Value for flag parsing.