121 lines
3.5 KiB
Go
121 lines
3.5 KiB
Go
// Copyright 2014 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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package container
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import (
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"math/big"
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"sync"
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"time"
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"github.com/google/cadvisor/info"
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"github.com/google/cadvisor/sampling"
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)
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type statsSummaryContainerHandlerWrapper struct {
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handler ContainerHandler
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currentSummary *info.ContainerStatsSummary
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totalMemoryUsage *big.Int
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numStats uint64
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sampler sampling.Sampler
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lock sync.Mutex
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}
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func (self *statsSummaryContainerHandlerWrapper) GetSpec() (*info.ContainerSpec, error) {
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return self.handler.GetSpec()
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}
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func (self *statsSummaryContainerHandlerWrapper) GetStats() (*info.ContainerStats, error) {
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stats, err := self.handler.GetStats()
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if err != nil {
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return nil, err
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}
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if stats == nil {
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return nil, nil
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}
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stats.Timestamp = time.Now()
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self.lock.Lock()
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defer self.lock.Unlock()
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self.sampler.Update(stats)
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if self.currentSummary == nil {
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self.currentSummary = new(info.ContainerStatsSummary)
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}
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self.numStats++
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if stats.Memory != nil {
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if stats.Memory.Usage > self.currentSummary.MaxMemoryUsage {
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self.currentSummary.MaxMemoryUsage = stats.Memory.Usage
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}
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// XXX(dengnan): Very inefficient!
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if self.totalMemoryUsage == nil {
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self.totalMemoryUsage = new(big.Int)
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}
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usage := (&big.Int{}).SetUint64(stats.Memory.Usage)
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self.totalMemoryUsage = self.totalMemoryUsage.Add(self.totalMemoryUsage, usage)
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n := (&big.Int{}).SetUint64(self.numStats)
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avg := (&big.Int{}).Div(self.totalMemoryUsage, n)
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self.currentSummary.AvgMemoryUsage = avg.Uint64()
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}
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return stats, nil
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}
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func (self *statsSummaryContainerHandlerWrapper) ListContainers(listType ListType) ([]string, error) {
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return self.handler.ListContainers(listType)
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}
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func (self *statsSummaryContainerHandlerWrapper) ListThreads(listType ListType) ([]int, error) {
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return self.handler.ListThreads(listType)
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}
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func (self *statsSummaryContainerHandlerWrapper) ListProcesses(listType ListType) ([]int, error) {
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return self.handler.ListProcesses(listType)
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}
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func (self *statsSummaryContainerHandlerWrapper) StatsSummary() (*info.ContainerStatsSummary, error) {
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self.lock.Lock()
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defer self.lock.Unlock()
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samples := make([]*info.ContainerStats, 0, self.sampler.Len())
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self.sampler.Map(func(d interface{}) {
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stats := d.(*info.ContainerStats)
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samples = append(samples, stats)
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})
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self.currentSummary.Samples = samples
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// XXX(dengnan): propabily add to StatsParameter?
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self.currentSummary.FillPercentiles(
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[]int{50, 80, 90, 95, 99},
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[]int{50, 80, 90, 95, 99},
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)
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return self.currentSummary, nil
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}
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type StatsParameter struct {
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Sampler string
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NumSamples int
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WindowSize int
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ResetPeriod time.Duration
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}
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func AddStatsSummary(handler ContainerHandler, parameter *StatsParameter) (ContainerHandler, error) {
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sampler, err := NewSampler(parameter)
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if err != nil {
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return nil, err
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}
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return &statsSummaryContainerHandlerWrapper{
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handler: handler,
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currentSummary: &info.ContainerStatsSummary{},
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sampler: sampler,
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}, nil
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}
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