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

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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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20
pkg/apis/core/v1/helper/helpers.go
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@@ -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