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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 metrics
import (
"time"
autoscaling "k8s.io/api/autoscaling/v2beta2"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/labels"
)
// PodMetric contains pod metric value (the metric values are expected to be the metric as a milli-value)
type PodMetric struct {
Timestamp time.Time
Window time.Duration
Value int64
}
// PodMetricsInfo contains pod metrics as a map from pod names to PodMetricsInfo
type PodMetricsInfo map[string]PodMetric
// MetricsClient knows how to query a remote interface to retrieve container-level
// resource metrics as well as pod-level arbitrary metrics
type MetricsClient interface {
// GetResourceMetric gets the given resource metric (and an associated oldest timestamp)
// for all pods matching the specified selector in the given namespace
GetResourceMetric(resource v1.ResourceName, namespace string, selector labels.Selector) (PodMetricsInfo, time.Time, error)
// GetRawMetric gets the given metric (and an associated oldest timestamp)
// for all pods matching the specified selector in the given namespace
GetRawMetric(metricName string, namespace string, selector labels.Selector, metricSelector labels.Selector) (PodMetricsInfo, time.Time, error)
// GetObjectMetric gets the given metric (and an associated timestamp) for the given
// object in the given namespace
GetObjectMetric(metricName string, namespace string, objectRef *autoscaling.CrossVersionObjectReference, metricSelector labels.Selector) (int64, time.Time, error)
// GetExternalMetric gets all the values of a given external metric
// that match the specified selector.
GetExternalMetric(metricName string, namespace string, selector labels.Selector) ([]int64, time.Time, error)
}
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