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storage.go
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storage.go
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// Copyright 2014 Google Inc. All Rights Reserved.
//
// 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 storage
import "github.com/google/cadvisor/info"
type StorageDriver interface {
AddStats(ref info.ContainerReference, stats *info.ContainerStats) error
// Read most recent stats. numStats indicates max number of stats
// returned. The returned stats must be consecutive observed stats. If
// numStats < 0, then return all stats stored in the storage. The
// returned stats should be sorted in time increasing order, i.e. Most
// recent stats should be the last.
RecentStats(containerName string, numStats int) ([]*info.ContainerStats, error)
// Read the specified percentiles of CPU and memory usage of the container.
// The implementation decides which time range to look at.
Percentiles(containerName string, cpuUsagePercentiles []int, memUsagePercentiles []int) (*info.ContainerStatsPercentiles, error)
// Returns samples of the container stats. If numSamples < 0, then
// the number of returned samples is implementation defined. Otherwise, the driver
// should return at most numSamples samples.
Samples(containerName string, numSamples int) ([]*info.ContainerStatsSample, error)
// Close will clear the state of the storage driver. The elements
// stored in the underlying storage may or may not be deleted depending
// on the implementation of the storage driver.
Close() error
}