forked from aws/amazon-ecs-agent
/
utils_unix.go
68 lines (62 loc) · 2.35 KB
/
utils_unix.go
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// +build !windows
// Copyright Amazon.com Inc. or its affiliates. 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. A copy of the
// License is located at
//
// http://aws.amazon.com/apache2.0/
//
// or in the "license" file accompanying this file. This file 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 stats
import (
"fmt"
"github.com/cihub/seelog"
"github.com/docker/docker/api/types"
)
// dockerStatsToContainerStats returns a new object of the ContainerStats object from docker stats.
func dockerStatsToContainerStats(dockerStats *types.StatsJSON) (*ContainerStats, error) {
cpuUsage := dockerStats.CPUStats.CPUUsage.TotalUsage / numCores
memoryUsage := dockerStats.MemoryStats.Usage - dockerStats.MemoryStats.Stats["cache"]
storageReadBytes, storageWriteBytes := getStorageStats(dockerStats)
networkStats := getNetworkStats(dockerStats)
return &ContainerStats{
cpuUsage: cpuUsage,
memoryUsage: memoryUsage,
storageReadBytes: storageReadBytes,
storageWriteBytes: storageWriteBytes,
networkStats: networkStats,
timestamp: dockerStats.Read,
}, nil
}
func validateDockerStats(dockerStats *types.StatsJSON) error {
// The length of PercpuUsage represents the number of cores in an instance.
if len(dockerStats.CPUStats.CPUUsage.PercpuUsage) == 0 || numCores == uint64(0) {
return fmt.Errorf("invalid container statistics reported, no cpu core usage reported")
}
return nil
}
func getStorageStats(dockerStats *types.StatsJSON) (uint64, uint64) {
// initialize block io and loop over stats to aggregate
if dockerStats.BlkioStats.IoServiceBytesRecursive == nil {
seelog.Debug("Storage stats not reported for container")
return uint64(0), uint64(0)
}
storageReadBytes := uint64(0)
storageWriteBytes := uint64(0)
for _, blockStat := range dockerStats.BlkioStats.IoServiceBytesRecursive {
switch op := blockStat.Op; op {
case "Read":
storageReadBytes += blockStat.Value
case "Write":
storageWriteBytes += blockStat.Value
default:
//ignoring "Async", "Total", "Sum", etc
continue
}
}
return storageReadBytes, storageWriteBytes
}