types.go

/*
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 v1alpha1

import (
	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)

// PodGroupPhase is the phase of a pod group at the current time.
type PodGroupPhase string

// These are the valid phase of podGroups.
const (
	// PodPending means the pod group has been accepted by the system, but scheduler can not allocate
	// enough resources to it.
	PodGroupPending PodGroupPhase = "Pending"

	// PodRunning means `spec.minMember` pods of PodGroups has been in running phase.
	PodGroupRunning PodGroupPhase = "Running"

	// PodGroupUnknown means part of `spec.minMember` pods are running but the other part can not
	// be scheduled, e.g. not enough resource; scheduler will wait for related controller to recover it.
	PodGroupUnknown PodGroupPhase = "Unknown"

	// PodGroupInqueue means controllers can start to create pods,
	// is a new state between PodGroupPending and PodGroupRunning
	PodGroupInqueue PodGroupPhase = "Inqueue"
)

type PodGroupConditionType string

const (
	// PodGroupUnschedulableType is Unschedulable event type
	PodGroupUnschedulableType PodGroupConditionType = "Unschedulable"

	// PodGroupScheduled is scheduled event type
	PodGroupScheduled PodGroupConditionType = "Scheduled"
)

type PodGroupConditionDetail string

const (
	// PodGroupReady is that PodGroup has reached scheduling restriction
	PodGroupReady PodGroupConditionDetail = "pod group is ready"
	// PodGroupNotReady is that PodGroup has not yet reached the scheduling restriction
	PodGroupNotReady PodGroupConditionDetail = "pod group is not ready"
)

// PodGroupCondition contains details for the current state of this pod group.
type PodGroupCondition struct {
	// Type is the type of the condition
	Type PodGroupConditionType `json:"type,omitempty" protobuf:"bytes,1,opt,name=type"`

	// Status is the status of the condition.
	Status v1.ConditionStatus `json:"status,omitempty" protobuf:"bytes,2,opt,name=status"`

	// The ID of condition transition.
	TransitionID string `json:"transitionID,omitempty" protobuf:"bytes,3,opt,name=transitionID"`

	// Last time the phase transitioned from another to current phase.
	// +optional
	LastTransitionTime metav1.Time `json:"lastTransitionTime,omitempty" protobuf:"bytes,4,opt,name=lastTransitionTime"`

	// Unique, one-word, CamelCase reason for the phase's last transition.
	// +optional
	Reason string `json:"reason,omitempty" protobuf:"bytes,5,opt,name=reason"`

	// Human-readable message indicating details about last transition.
	// +optional
	Message string `json:"message,omitempty" protobuf:"bytes,6,opt,name=message"`
}

const (
	// PodFailedReason is probed if pod of PodGroup failed
	PodFailedReason string = "PodFailed"

	// PodDeletedReason is probed if pod of PodGroup deleted
	PodDeletedReason string = "PodDeleted"

	// NotEnoughResourcesReason is probed if there're not enough resources to schedule pods
	NotEnoughResourcesReason string = "NotEnoughResources"

	// NotEnoughPodsReason is probed if there're not enough tasks compared to `spec.minMember`
	NotEnoughPodsReason string = "NotEnoughTasks"
)

// +genclient
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// PodGroup is a collection of Pod; used for batch workload.
type PodGroup struct {
	metav1.TypeMeta `json:",inline"`
	// Standard object's metadata.
	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
	// +optional
	metav1.ObjectMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// Specification of the desired behavior of the pod group.
	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status
	// +optional
	Spec PodGroupSpec `json:"spec,omitempty" protobuf:"bytes,2,opt,name=spec"`

	// Status represents the current information about a pod group.
	// This data may not be up to date.
	// +optional
	Status PodGroupStatus `json:"status,omitempty" protobuf:"bytes,3,opt,name=status"`
}

// PodGroupSpec represents the template of a pod group.
type PodGroupSpec struct {
	// MinMember defines the minimal number of members/tasks to run the pod group;
	// if there's not enough resources to start all tasks, the scheduler
	// will not start anyone.
	MinMember int32 `json:"minMember,omitempty" protobuf:"bytes,1,opt,name=minMember"`

	// Queue defines the queue to allocate resource for PodGroup; if queue does not exist,
	// the PodGroup will not be scheduled. Defaults to `default` Queue with the lowest weight.
	// +optional
	Queue string `json:"queue,omitempty" protobuf:"bytes,2,opt,name=queue"`

	// If specified, indicates the PodGroup's priority. "system-node-critical" and
	// "system-cluster-critical" are two special keywords which indicate the
	// highest priorities with the former being the highest priority. Any other
	// name must be defined by creating a PriorityClass object with that name.
	// If not specified, the PodGroup priority will be default or zero if there is no
	// default.
	// +optional
	PriorityClassName string `json:"priorityClassName,omitempty" protobuf:"bytes,3,opt,name=priorityClassName"`

	// MinResources defines the minimal resource of members/tasks to run the pod group;
	// if there's not enough resources to start all tasks, the scheduler
	// will not start anyone.
	MinResources *v1.ResourceList `json:"minResources,omitempty" protobuf:"bytes,4,opt,name=minResources"`
}

// PodGroupStatus represents the current state of a pod group.
type PodGroupStatus struct {
	// Current phase of PodGroup.
	Phase PodGroupPhase `json:"phase,omitempty" protobuf:"bytes,1,opt,name=phase"`

	// The conditions of PodGroup.
	// +optional
	Conditions []PodGroupCondition `json:"conditions,omitempty" protobuf:"bytes,2,opt,name=conditions"`

	// The number of actively running pods.
	// +optional
	Running int32 `json:"running,omitempty" protobuf:"bytes,3,opt,name=running"`

	// The number of pods which reached phase Succeeded.
	// +optional
	Succeeded int32 `json:"succeeded,omitempty" protobuf:"bytes,4,opt,name=succeeded"`

	// The number of pods which reached phase Failed.
	// +optional
	Failed int32 `json:"failed,omitempty" protobuf:"bytes,5,opt,name=failed"`
}

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// PodGroupList is a collection of pod groups.
type PodGroupList struct {
	metav1.TypeMeta `json:",inline"`
	// Standard list metadata
	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
	// +optional
	metav1.ListMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// items is the list of PodGroup
	Items []PodGroup `json:"items" protobuf:"bytes,2,rep,name=items"`
}

// +genclient
// +genclient:nonNamespaced
// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// Queue is a queue of PodGroup.
type Queue struct {
	metav1.TypeMeta `json:",inline"`
	// Standard object's metadata.
	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
	// +optional
	metav1.ObjectMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// Specification of the desired behavior of the queue.
	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#spec-and-status
	// +optional
	Spec QueueSpec `json:"spec,omitempty" protobuf:"bytes,2,opt,name=spec"`

	// The status of queue.
	// +optional
	Status QueueStatus `json:"status,omitempty" protobuf:"bytes,3,opt,name=status"`
}

// QueueStatus represents the status of Queue.
type QueueStatus struct {
	// The number of 'Unknown' PodGroup in this queue.
	Unknown int32 `json:"unknown,omitempty" protobuf:"bytes,1,opt,name=unknown"`
	// The number of 'Pending' PodGroup in this queue.
	Pending int32 `json:"pending,omitempty" protobuf:"bytes,2,opt,name=pending"`
	// The number of 'Running' PodGroup in this queue.
	Running int32 `json:"running,omitempty" protobuf:"bytes,3,opt,name=running"`
}

// QueueSpec represents the template of Queue.
type QueueSpec struct {
	Weight     int32           `json:"weight,omitempty" protobuf:"bytes,1,opt,name=weight"`
	Capability v1.ResourceList `json:"capability,omitempty" protobuf:"bytes,2,opt,name=capability"`
}

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

// QueueList is a collection of queues.
type QueueList struct {
	metav1.TypeMeta `json:",inline"`
	// Standard list metadata
	// More info: https://git.k8s.io/community/contributors/devel/api-conventions.md#metadata
	// +optional
	metav1.ListMeta `json:"metadata,omitempty" protobuf:"bytes,1,opt,name=metadata"`

	// items is the list of PodGroup
	Items []Queue `json:"items" protobuf:"bytes,2,rep,name=items"`
}