context

type BatchContext struct {
	RolloutID string `json:"rolloutID,omitempty"`
	// current batch index, start from 0
	CurrentBatch int32 `json:"currentBatchIndex"`
	// workload update revision
	UpdateRevision string `json:"updateRevision,omitempty"`

	// workload replicas
	Replicas int32 `json:"replicas"`
	// Updated replicas
	UpdatedReplicas int32 `json:"updatedReplicas"`
	// Updated ready replicas
	UpdatedReadyReplicas int32 `json:"updatedReadyReplicas"`
	// no need update replicas that marked before rollout
	NoNeedUpdatedReplicas *int32 `json:"noNeedUpdatedReplicas,omitempty"`
	// the planned number of Pods should be upgrade in current batch
	// this field corresponds to releasePlan.Batches[currentBatch]
	PlannedUpdatedReplicas int32 `json:"plannedUpdatedReplicas,omitempty"`
	// the total number of the really updated pods you desired in current batch.
	// In most normal cases, this field will equal to PlannedUpdatedReplicas,
	// but in some scene, e.g., rolling back in batches, the really desired updated
	// replicas will not equal to planned update replicas, because we just roll the
	// pods that really need update back in batches.
	DesiredUpdatedReplicas int32 `json:"desiredUpdatedReplicas,omitempty"`
	// workload current partition
	CurrentPartition intstr.IntOrString `json:"currentPartition,omitempty"`
	// desired partition replicas in current batch
	DesiredPartition intstr.IntOrString `json:"desiredPartition,omitempty"`
	// failureThreshold to tolerate unready updated replicas;
	FailureThreshold *intstr.IntOrString `json:"failureThreshold,omitempty"`

	// the pods owned by workload
	Pods []*corev1.Pod `json:"-"`
	// filter or sort pods before patch label
	FilterFunc FilterFuncType `json:"-"`
	// the next two fields are only used for bluegreen style
	CurrentSurge intstr.IntOrString `json:"currentSurge,omitempty"`
	DesiredSurge intstr.IntOrString `json:"desiredSurge,omitempty"`
}

type FilterFuncType func(pods []*corev1.Pod, ctx *BatchContext) []*corev1.Pod