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Scheduler extension

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This commit is contained in:
Ravi Gadde
2015-09-03 23:50:14 -07:00
parent ef84c57965
commit cadc24e9fd
20 changed files with 1278 additions and 138 deletions
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73
plugin/pkg/scheduler/api/v1/types.go
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@@ -16,7 +16,13 @@ limitations under the License.
package v1
import "k8s.io/kubernetes/pkg/api/unversioned"
import (
"time"
"k8s.io/kubernetes/pkg/api/unversioned"
apiv1 "k8s.io/kubernetes/pkg/api/v1"
client "k8s.io/kubernetes/pkg/client/unversioned"
)
type Policy struct {
unversioned.TypeMeta `json:",inline"`
@@ -24,6 +30,8 @@ type Policy struct {
Predicates []PredicatePolicy `json:"predicates"`
// Holds the information to configure the priority functions
Priorities []PriorityPolicy `json:"priorities"`
// Holds the information to communicate with the extender(s)
ExtenderConfigs []ExtenderConfig `json:"extenders"`
}
type PredicatePolicy struct {
@@ -100,3 +108,66 @@ type LabelPreference struct {
// If false, higher priority is given to nodes that do not have the label
Presence bool `json:"presence"`
}
// Holds the parameters used to communicate with the extender. If a verb is unspecified/empty,
// it is assumed that the extender chose not to provide that extension.
type ExtenderConfig struct {
// URLPrefix at which the extender is available
URLPrefix string `json:"urlPrefix"`
// Verb for the filter call, empty if not supported. This verb is appended to the URLPrefix when issuing the filter call to extender.
FilterVerb string `json:"filterVerb,omitempty"`
// Verb for the prioritize call, empty if not supported. This verb is appended to the URLPrefix when issuing the prioritize call to extender.
PrioritizeVerb string `json:"prioritizeVerb,omitempty"`
// The numeric multiplier for the node scores that the prioritize call generates.
// The weight should be a positive integer
Weight int `json:"weight,omitempty"`
// EnableHttps specifies whether https should be used to communicate with the extender
EnableHttps bool `json:"enableHttps,omitempty"`
// TLSConfig specifies the transport layer security config
TLSConfig *client.TLSClientConfig `json:"tlsConfig,omitempty"`
// HTTPTimeout specifies the timeout duration for a call to the extender. Filter timeout fails the scheduling of the pod. Prioritize
// timeout is ignored, k8s/other extenders priorities are used to select the node.
HTTPTimeout time.Duration `json:"httpTimeout,omitempty"`
}
// ExtenderArgs represents the arguments needed by the extender to filter/prioritize
// nodes for a pod.
type ExtenderArgs struct {
// Pod being scheduled
Pod apiv1.Pod `json:"pod"`
// List of candidate nodes where the pod can be scheduled
Nodes apiv1.NodeList `json:"nodes"`
}
// ExtenderFilterResult represents the results of a filter call to an extender
type ExtenderFilterResult struct {
// Filtered set of nodes where the pod can be scheduled
Nodes apiv1.NodeList `json:"nodes,omitempty"`
// Error message indicating failure
Error string `json:"error,omitempty"`
}
// HostPriority represents the priority of scheduling to a particular host, higher priority is better.
type HostPriority struct {
// Name of the host
Host string `json:"host"`
// Score associated with the host
Score int `json:"score"`
}
type HostPriorityList []HostPriority
func (h HostPriorityList) Len() int {
return len(h)
}
func (h HostPriorityList) Less(i, j int) bool {
if h[i].Score == h[j].Score {
return h[i].Host < h[j].Host
}
return h[i].Score < h[j].Score
}
func (h HostPriorityList) Swap(i, j int) {
h[i], h[j] = h[j], h[i]
}