prometheus/cadvisor
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changing info package to work with storage drivers.

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This commit is contained in:
Nan Deng 2014-06-16 15:41:46 -07:00
parent 27f7bd7152
commit 6e98c92693
4 changed files with 30 additions and 20 deletions
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2
container/statssum.go
View File

@ -118,9 +118,9 @@ func (self *percentilesContainerHandlerWrapper) StatsPercentiles() (*info.Contai
stats := d.(*info.ContainerStatsSample)
samples = append(samples, stats)
})
self.containerPercentiles.Samples = samples
// XXX(dengnan): probably add to StatsParameter?
self.containerPercentiles.FillPercentiles(
samples,
[]int{50, 80, 90, 95, 99},
[]int{50, 80, 90, 95, 99},
)

8
container/statssum_test.go
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@ -164,11 +164,13 @@ func TestSampleCpuUsage(t *testing.T) {
}
}
s, err := handler.StatsPercentiles()
_, err := handler.StatsPercentiles()
if err != nil {
t.Fatal(err)
}
for _, sample := range s.Samples {
hs := handler.(*percentilesContainerHandlerWrapper)
hs.sampler.Map(func(d interface{}) {
sample := d.(*info.ContainerStatsSample)
if sample.Duration != samplePeriod {
t.Errorf("sample duration is %v, not %v", sample.Duration, samplePeriod)
}
@ -182,5 +184,5 @@ func TestSampleCpuUsage(t *testing.T) {
if !found {
t.Errorf("unable to find cpu usage %v", cpuUsage)
}
}
})
}

31
info/container.go
View File

@ -69,6 +69,9 @@ type ContainerInfo struct {
// Historical statistics gathered from the container.
Stats []*ContainerStats `json:"stats,omitempty"`
// Randomly sampled container states.
Samples []*ContainerStatsSample `json:"samples,omitempty"`
StatsPercentiles *ContainerStatsPercentiles `json:"stats_summary,omitempty"`
}
@ -177,19 +180,15 @@ type ContainerStatsSample struct {
} `json:"memory"`
}
// This is not exported.
// Use FillPercentile to calculate percentiles
type percentile struct {
type Percentile struct {
Percentage int `json:"percentage"`
Value uint64 `json:"value"`
}
type ContainerStatsPercentiles struct {
// TODO(dengnan): More things?
MaxMemoryUsage uint64 `json:"max_memory_usage,omitempty"`
Samples []*ContainerStatsSample `json:"samples,omitempty"`
MemoryUsagePercentiles []percentile `json:"memory_usage_percentiles,omitempty"`
CpuUsagePercentiles []percentile `json:"cpu_usage_percentiles,omitempty"`
MaxMemoryUsage uint64 `json:"max_memory_usage,omitempty"`
MemoryUsagePercentiles []Percentile `json:"memory_usage_percentiles,omitempty"`
CpuUsagePercentiles []Percentile `json:"cpu_usage_percentiles,omitempty"`
}
// Each sample needs two stats because the cpu usage in ContainerStats is
@ -237,11 +236,11 @@ func (self uint64Slice) Swap(i, j int) {
self[i], self[j] = self[j], self[i]
}
func (self uint64Slice) Percentiles(requestedPercentiles ...int) []percentile {
func (self uint64Slice) Percentiles(requestedPercentiles ...int) []Percentile {
if len(self) == 0 {
return nil
}
ret := make([]percentile, 0, len(requestedPercentiles))
ret := make([]Percentile, 0, len(requestedPercentiles))
sort.Sort(self)
for _, p := range requestedPercentiles {
idx := (len(self) * p / 100) - 1
@ -250,7 +249,7 @@ func (self uint64Slice) Percentiles(requestedPercentiles ...int) []percentile {
}
ret = append(
ret,
percentile{
Percentile{
Percentage: p,
Value: self[idx],
},
@ -259,14 +258,14 @@ func (self uint64Slice) Percentiles(requestedPercentiles ...int) []percentile {
return ret
}
func (self *ContainerStatsPercentiles) FillPercentiles(cpuPercentages, memoryPercentages []int) {
if len(self.Samples) == 0 {
func (self *ContainerStatsPercentiles) FillPercentiles(samples []*ContainerStatsSample, cpuPercentages, memoryPercentages []int) {
if len(samples) == 0 {
return
}
cpuUsages := make([]uint64, 0, len(self.Samples))
memUsages := make([]uint64, 0, len(self.Samples))
cpuUsages := make([]uint64, 0, len(samples))
memUsages := make([]uint64, 0, len(samples))
for _, sample := range self.Samples {
for _, sample := range samples {
if sample == nil {
continue
}

9
storage/storage.go
View File

@ -18,4 +18,13 @@ 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.
RecentStats(numStats int) ([]*info.ContainerStats, error)
Percentiles(cpuUsagePercentiles []int, memUsagePercentiles []int) (*info.ContainerStatsPercentiles, error)
Samples(numSamples int) ([]*info.ContainerStatsSample, error)
}