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Resources prefixed with *kubernetes.io/ should remain unscheduled if they are not exposed on the node.

Browse Source 
Currently, resources prefixed with *kubernetes.io/ get scheduled to any
node whether it's exposing that resource or not.

On the other hand, resources prefixed with someother.domain/ don't get
scheduled to a node until that node is exposing that resource (or if the
resource is ignored because of scheduler extender).

This commit brings the behavior of *kubernetes.io/ prefixed resources in
line with other extended resources and they will remain unscheduled
until some node exposes these resources.

This also includes renaming IsDefaultNamespaceResource() to
IsNativeResource().
This commit is contained in:
Rohit Agarwal 2018-03-28 13:09:23 -07:00
parent 5d1a3287b6
commit e6db88b12d
7 changed files with 45 additions and 19 deletions
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8
pkg/apis/core/helper/helpers.go
View File

@ -153,7 +153,7 @@ func IsStandardContainerResourceName(str string) bool {
// to avoid confusion with the convention in quota
// 3. it satisfies the rules in IsQualifiedName() after converted into quota resource name
func IsExtendedResourceName(name core.ResourceName) bool {
if IsDefaultNamespaceResource(name) || strings.HasPrefix(string(name), core.DefaultResourceRequestsPrefix) {
if IsNativeResource(name) || strings.HasPrefix(string(name), core.DefaultResourceRequestsPrefix) {
return false
}
// Ensure it satisfies the rules in IsQualifiedName() after converted into quota resource name
@ -164,10 +164,10 @@ func IsExtendedResourceName(name core.ResourceName) bool {
return true
}
// IsDefaultNamespaceResource returns true if the resource name is in the
// IsNativeResource returns true if the resource name is in the
// *kubernetes.io/ namespace. Partially-qualified (unprefixed) names are
// implicitly in the kubernetes.io/ namespace.
func IsDefaultNamespaceResource(name core.ResourceName) bool {
func IsNativeResource(name core.ResourceName) bool {
return !strings.Contains(string(name), "/") ||
strings.Contains(string(name), core.ResourceDefaultNamespacePrefix)
}
@ -177,7 +177,7 @@ var overcommitBlacklist = sets.NewString(string(core.ResourceNvidiaGPU))
// IsOvercommitAllowed returns true if the resource is in the default
// namespace and not blacklisted.
func IsOvercommitAllowed(name core.ResourceName) bool {
return IsDefaultNamespaceResource(name) &&
return IsNativeResource(name) &&
!IsHugePageResourceName(name) &&
!overcommitBlacklist.Has(string(name))
}

20
pkg/apis/core/v1/helper/helpers.go
View File

@ -36,7 +36,7 @@ import (
// to avoid confusion with the convention in quota
// 3. it satisfies the rules in IsQualifiedName() after converted into quota resource name
func IsExtendedResourceName(name v1.ResourceName) bool {
if IsDefaultNamespaceResource(name) || strings.HasPrefix(string(name), v1.DefaultResourceRequestsPrefix) {
if IsNativeResource(name) || strings.HasPrefix(string(name), v1.DefaultResourceRequestsPrefix) {
return false
}
// Ensure it satisfies the rules in IsQualifiedName() after converted into quota resource name
@ -47,13 +47,18 @@ func IsExtendedResourceName(name v1.ResourceName) bool {
return true
}
// IsDefaultNamespaceResource returns true if the resource name is in the
// IsPrefixedNativeResource returns true if the resource name is in the
// *kubernetes.io/ namespace.
func IsPrefixedNativeResource(name v1.ResourceName) bool {
return strings.Contains(string(name), v1.ResourceDefaultNamespacePrefix)
}
// IsNativeResource returns true if the resource name is in the
// *kubernetes.io/ namespace. Partially-qualified (unprefixed) names are
// implicitly in the kubernetes.io/ namespace.
func IsDefaultNamespaceResource(name v1.ResourceName) bool {
func IsNativeResource(name v1.ResourceName) bool {
return !strings.Contains(string(name), "/") ||
strings.Contains(string(name), v1.ResourceDefaultNamespacePrefix)
IsPrefixedNativeResource(name)
}
// IsHugePageResourceName returns true if the resource name has the huge page
@ -85,14 +90,15 @@ var overcommitBlacklist = sets.NewString(string(v1.ResourceNvidiaGPU))
// IsOvercommitAllowed returns true if the resource is in the default
// namespace and not blacklisted and is not hugepages.
func IsOvercommitAllowed(name v1.ResourceName) bool {
return IsDefaultNamespaceResource(name) &&
return IsNativeResource(name) &&
!IsHugePageResourceName(name) &&
!overcommitBlacklist.Has(string(name))
}
// Extended and Hugepages resources
func IsScalarResourceName(name v1.ResourceName) bool {
return IsExtendedResourceName(name) || IsHugePageResourceName(name)
return IsExtendedResourceName(name) || IsHugePageResourceName(name) ||
IsPrefixedNativeResource(name)
}
// this function aims to check if the service's ClusterIP is set or not

4
pkg/apis/core/v1/helper/helpers_test.go
View File

@ -28,7 +28,7 @@ import (
"k8s.io/apimachinery/pkg/labels"
)
func TestIsDefaultNamespaceResource(t *testing.T) {
func TestIsNativeResource(t *testing.T) {
testCases := []struct {
resourceName v1.ResourceName
expectVal bool
@ -58,7 +58,7 @@ func TestIsDefaultNamespaceResource(t *testing.T) {
for _, tc := range testCases {
t.Run(fmt.Sprintf("resourceName input=%s, expected value=%v", tc.resourceName, tc.expectVal), func(t *testing.T) {
t.Parallel()
v := IsDefaultNamespaceResource(tc.resourceName)
v := IsNativeResource(tc.resourceName)
if v != tc.expectVal {
t.Errorf("Got %v but expected %v", v, tc.expectVal)
}

2
pkg/apis/core/v1/validation/validation.go
View File

@ -75,7 +75,7 @@ func validateContainerResourceName(value string, fldPath *field.Path) field.Erro
if !helper.IsStandardContainerResourceName(value) {
return append(allErrs, field.Invalid(fldPath, value, "must be a standard resource for containers"))
}
} else if !v1helper.IsDefaultNamespaceResource(v1.ResourceName(value)) {
} else if !v1helper.IsNativeResource(v1.ResourceName(value)) {
if !v1helper.IsExtendedResourceName(v1.ResourceName(value)) {
return append(allErrs, field.Invalid(fldPath, value, "doesn't follow extended resource name standard"))
}

2
pkg/apis/core/validation/validation.go
View File

@ -4140,7 +4140,7 @@ func validateContainerResourceName(value string, fldPath *field.Path) field.Erro
if !helper.IsStandardContainerResourceName(value) {
return append(allErrs, field.Invalid(fldPath, value, "must be a standard resource for containers"))
}
} else if !helper.IsDefaultNamespaceResource(core.ResourceName(value)) {
} else if !helper.IsNativeResource(core.ResourceName(value)) {
if !helper.IsExtendedResourceName(core.ResourceName(value)) {
return append(allErrs, field.Invalid(fldPath, value, "doesn't follow extended resource name standard"))
}

2
pkg/quota/evaluator/core/pods.go
View File

@ -81,7 +81,7 @@ func maskResourceWithPrefix(resource api.ResourceName, prefix string) api.Resour
func isExtendedResourceNameForQuota(name api.ResourceName) bool {
// As overcommit is not supported by extended resources for now,
// only quota objects in format of "requests.resourceName" is allowed.
return !helper.IsDefaultNamespaceResource(name) && strings.HasPrefix(string(name), api.DefaultResourceRequestsPrefix)
return !helper.IsNativeResource(name) && strings.HasPrefix(string(name), api.DefaultResourceRequestsPrefix)
}
// NOTE: it was a mistake, but if a quota tracks cpu or memory related resources,

26
pkg/scheduler/algorithm/predicates/predicates_test.go
View File

@ -37,9 +37,11 @@ import (
)
var (
extendedResourceA = v1.ResourceName("example.com/aaa")
extendedResourceB = v1.ResourceName("example.com/bbb")
hugePageResourceA = v1helper.HugePageResourceName(resource.MustParse("2Mi"))
extendedResourceA = v1.ResourceName("example.com/aaa")
extendedResourceB = v1.ResourceName("example.com/bbb")
kubernetesIOResourceA = v1.ResourceName("kubernetes.io/something")
kubernetesIOResourceB = v1.ResourceName("subdomain.kubernetes.io/something")
hugePageResourceA = v1helper.HugePageResourceName(resource.MustParse("2Mi"))
)
func makeResources(milliCPU, memory, nvidiaGPUs, pods, extendedA, storage, hugePageA int64) v1.NodeResources {
@ -297,6 +299,24 @@ func TestPodFitsResources(t *testing.T) {
test: "extended resource allocatable enforced for unknown resource for init container",
reasons: []algorithm.PredicateFailureReason{NewInsufficientResourceError(extendedResourceB, 1, 0, 0)},
},
{
pod: newResourcePod(
schedulercache.Resource{MilliCPU: 1, Memory: 1, ScalarResources: map[v1.ResourceName]int64{kubernetesIOResourceA: 10}}),
nodeInfo: schedulercache.NewNodeInfo(
newResourcePod(schedulercache.Resource{MilliCPU: 0, Memory: 0})),
fits: false,
test: "kubernetes.io resource capacity enforced",
reasons: []algorithm.PredicateFailureReason{NewInsufficientResourceError(kubernetesIOResourceA, 10, 0, 0)},
},
{
pod: newResourceInitPod(newResourcePod(schedulercache.Resource{}),
schedulercache.Resource{MilliCPU: 1, Memory: 1, ScalarResources: map[v1.ResourceName]int64{kubernetesIOResourceB: 10}}),
nodeInfo: schedulercache.NewNodeInfo(
newResourcePod(schedulercache.Resource{MilliCPU: 0, Memory: 0})),
fits: false,
test: "kubernetes.io resource capacity enforced for init container",
reasons: []algorithm.PredicateFailureReason{NewInsufficientResourceError(kubernetesIOResourceB, 10, 0, 0)},
},
{
pod: newResourcePod(
schedulercache.Resource{MilliCPU: 1, Memory: 1, ScalarResources: map[v1.ResourceName]int64{hugePageResourceA: 10}}),