3c0c5ed4e0
godep restore pushd $GOPATH/src/github.com/appc/spec git co master popd go get go4.org/errorutil rm -rf Godeps godep save ./... git add vendor git add -f $(git ls-files --other vendor/) git co -- Godeps/LICENSES Godeps/.license_file_state Godeps/OWNERS
135 lines
3.1 KiB
Go
135 lines
3.1 KiB
Go
// Copyright 2015 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Handler for Docker containers.
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package common
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import (
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"sync"
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"time"
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"github.com/google/cadvisor/fs"
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"github.com/golang/glog"
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)
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type FsHandler interface {
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Start()
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Usage() (baseUsageBytes uint64, totalUsageBytes uint64)
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Stop()
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}
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type realFsHandler struct {
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sync.RWMutex
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lastUpdate time.Time
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usageBytes uint64
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baseUsageBytes uint64
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period time.Duration
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minPeriod time.Duration
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rootfs string
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extraDir string
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fsInfo fs.FsInfo
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// Tells the container to stop.
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stopChan chan struct{}
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}
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const (
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longDu = time.Second
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duTimeout = time.Minute
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maxDuBackoffFactor = 20
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)
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var _ FsHandler = &realFsHandler{}
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func NewFsHandler(period time.Duration, rootfs, extraDir string, fsInfo fs.FsInfo) FsHandler {
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return &realFsHandler{
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lastUpdate: time.Time{},
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usageBytes: 0,
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baseUsageBytes: 0,
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period: period,
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minPeriod: period,
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rootfs: rootfs,
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extraDir: extraDir,
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fsInfo: fsInfo,
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stopChan: make(chan struct{}, 1),
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}
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}
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func (fh *realFsHandler) update() error {
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var (
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baseUsage, extraDirUsage uint64
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err error
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)
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// TODO(vishh): Add support for external mounts.
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if fh.rootfs != "" {
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baseUsage, err = fh.fsInfo.GetDirUsage(fh.rootfs, duTimeout)
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if err != nil {
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return err
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}
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}
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if fh.extraDir != "" {
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extraDirUsage, err = fh.fsInfo.GetDirUsage(fh.extraDir, duTimeout)
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if err != nil {
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return err
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}
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}
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fh.Lock()
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defer fh.Unlock()
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fh.lastUpdate = time.Now()
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fh.usageBytes = baseUsage + extraDirUsage
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fh.baseUsageBytes = baseUsage
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return nil
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}
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func (fh *realFsHandler) trackUsage() {
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fh.update()
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for {
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select {
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case <-fh.stopChan:
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return
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case <-time.After(fh.period):
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start := time.Now()
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if err := fh.update(); err != nil {
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glog.Errorf("failed to collect filesystem stats - %v", err)
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fh.period = fh.period * 2
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if fh.period > maxDuBackoffFactor*fh.minPeriod {
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fh.period = maxDuBackoffFactor * fh.minPeriod
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}
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} else {
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fh.period = fh.minPeriod
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}
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duration := time.Since(start)
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if duration > longDu {
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glog.V(2).Infof("`du` on following dirs took %v: %v", duration, []string{fh.rootfs, fh.extraDir})
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}
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}
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}
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}
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func (fh *realFsHandler) Start() {
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go fh.trackUsage()
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}
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func (fh *realFsHandler) Stop() {
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close(fh.stopChan)
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}
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func (fh *realFsHandler) Usage() (baseUsageBytes, totalUsageBytes uint64) {
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fh.RLock()
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defer fh.RUnlock()
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return fh.baseUsageBytes, fh.usageBytes
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}
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