diff --git a/cluster-autoscaler/clusterstate/api/types.go b/cluster-autoscaler/clusterstate/api/types.go
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+/*
+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 api
+
+// TODO: Remove this once Cluster Autoscaler api is approved.
+
+import (
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// ClusterAutoscalerConditionType is the type of ClusterAutoscalerCondition.
+type ClusterAutoscalerConditionType string
+
+const (
+	// ClusterAutoscalerHealth - is a condition that explains what is the current health
+	// of ClusterAutoscaler or its node groups.
+	ClusterAutoscalerHealth ClusterAutoscalerConditionType = "Health"
+	// ClusterAutoscalerScaleDown is a condition that explains what is the current status
+	// of a node group with regard to scale down activities.
+	ClusterAutoscalerScaleDown ClusterAutoscalerConditionType = "ScaleDown"
+	// ClusterAutoscalerScaleUp is a condition that explains what is the current status
+	// of a node group with regard to scale down activities.
+	ClusterAutoscalerScaleUp ClusterAutoscalerConditionType = "ScaleUp"
+)
+
+// ClusterAutoscalerConditionStatus is a status of ClusterAutoscalerCondition.
+type ClusterAutoscalerConditionStatus string
+
+const (
+	// Statuses for Health condition type.
+
+	// ClusterAutoscalerHealthy status means that the cluster is in a good shape.
+	ClusterAutoscalerHealthy ClusterAutoscalerConditionStatus = "Healthy"
+	// ClusterAutoscalerUnhealthy status means that the cluster is in a bad shape.
+	ClusterAutoscalerUnhealthy ClusterAutoscalerConditionStatus = "Unhealthy"
+
+	// Statuses for ScaleDown condition type.
+
+	//ClusterAutoscalerCandidatesPresent status means that there are candidates for scale down.
+	ClusterAutoscalerCandidatesPresent ClusterAutoscalerConditionStatus = "CandidatesPresent"
+	//ClusterAutoscalerNoCandidates status means that there are no candidates for scale down.
+	ClusterAutoscalerNoCandidates ClusterAutoscalerConditionStatus = "NoCandidates"
+
+	// Statuses for ScaleUp condition type.
+
+	// ClusterAutoscalerNeeded status means that scale up is needed.
+	ClusterAutoscalerNeeded ClusterAutoscalerConditionStatus = "Needed"
+	// ClusterAutoscalerNotNeeded status means that scale up is not needed.
+	ClusterAutoscalerNotNeeded ClusterAutoscalerConditionStatus = "NotNeeded"
+	// ClusterAutoscalerInProgress status means that scale up is in progress.
+	ClusterAutoscalerInProgress ClusterAutoscalerConditionStatus = "InProgress"
+	// ClusterAutoscalerNoActivity status means that there has been no scale up activity recently.
+	ClusterAutoscalerNoActivity ClusterAutoscalerConditionStatus = "NoActivity"
+)
+
+// ClusterAutoscalerCondition describes some aspect of ClusterAutoscaler work.
+type ClusterAutoscalerCondition struct {
+	// Type defines the aspect that the condition describes. For example, it can be Health or ScaleUp/Down activity.
+	Type ClusterAutoscalerConditionType `json:"type,omitempty"`
+	// Status of the condition.
+	Status ClusterAutoscalerConditionStatus `json:"status,omitempty"`
+	// Message is a free text extra information about the condition. It may contain some
+	// extra debugging data, like why the cluster is unhealthy.
+	Message string `json:"message,omitempty"`
+	// Reason is an unique, one-word, CamelCase reason for the condition's last transition.
+	Reason string `json:"reason,omitempty"`
+	// LastProbeTime is the last time we probed the condition.
+	LastProbeTime metav1.Time `json:"lastProbeTime,omitempty"`
+	// LastTransitionTime is the time since when the condition was in the given state.
+	LastTransitionTime metav1.Time `json:"lastTransitionTime,omitempty"`
+}
+
+// ClusterAutoscalerStatus contains ClusterAutoscaler status.
+type ClusterAutoscalerStatus struct {
+	// NodeGroupStatuses contains status information of individual node groups on which CA works.
+	NodeGroupStatuses []NodeGroupStatus `json:"nodeGroupStatuses,omitempty"`
+	// ClusterwideConditions contains conditions that apply to the whole autoscaler.
+	ClusterwideConditions []ClusterAutoscalerCondition `json:"clusterwideConditions,omitempty"`
+}
+
+// NodeGroupStatus contains status of a group of nodes controlled by ClusterAutoscaler.
+type NodeGroupStatus struct {
+	// ProviderID is the cloud-provider-specific name of the node group. On GCE it will be equal
+	// to MIG url, on AWS it will be ASG name, etc.
+	ProviderID string `json:"providerID,omitempty"`
+	// Conditions is a list of conditions that describe the state of the node group.
+	Conditions []ClusterAutoscalerCondition `json:"conditions,omitempty"`
+}