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Merge pull request #1249 from theatrus/add-container-stats

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Add methods for listing and fetching container stats
This commit is contained in:
Mrunal Patel 2018-02-15 13:29:15 -08:00 • committed by GitHub
commit 8f5e37a83c
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4 changed files with 111 additions and 42 deletions
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14
lib/stats.go
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@ -15,8 +15,8 @@ import (
type ContainerStats struct {
Container string
CPU float64
cpuNano uint64
systemNano uint64
CPUNano uint64
SystemNano int64
MemUsage uint64
MemLimit uint64
MemPerc float64
@ -29,8 +29,8 @@ type ContainerStats struct {
// GetContainerStats gets the running stats for a given container
func (c *ContainerServer) GetContainerStats(ctr *oci.Container, previousStats *ContainerStats) (*ContainerStats, error) {
previousCPU := previousStats.cpuNano
previousSystem := previousStats.systemNano
previousCPU := previousStats.CPUNano
previousSystem := previousStats.SystemNano
libcontainerStats, err := c.LibcontainerStats(ctr)
if err != nil {
return nil, err
@ -38,6 +38,8 @@ func (c *ContainerServer) GetContainerStats(ctr *oci.Container, previousStats *C
cgroupStats := libcontainerStats.CgroupStats
stats := new(ContainerStats)
stats.Container = ctr.ID()
stats.CPUNano = cgroupStats.CpuStats.CpuUsage.TotalUsage
stats.SystemNano = time.Now().UnixNano()
stats.CPU = calculateCPUPercent(libcontainerStats, previousCPU, previousSystem)
stats.MemUsage = cgroupStats.MemoryStats.Usage.Usage
stats.MemLimit = getMemLimit(cgroupStats.MemoryStats.Usage.Limit)
@ -84,11 +86,11 @@ func getContainerNetIO(stats *libcontainer.Stats) (received uint64, transmitted
return
}
func calculateCPUPercent(stats *libcontainer.Stats, previousCPU, previousSystem uint64) float64 {
func calculateCPUPercent(stats *libcontainer.Stats, previousCPU uint64, previousSystem int64) float64 {
var (
cpuPercent = 0.0
cpuDelta = float64(stats.CgroupStats.CpuStats.CpuUsage.TotalUsage - previousCPU)
systemDelta = float64(uint64(time.Now().UnixNano()) - previousSystem)
systemDelta = float64(uint64(time.Now().UnixNano()) - uint64(previousSystem))
)
if systemDelta > 0.0 && cpuDelta > 0.0 {
// gets a ratio of container cpu usage total, multiplies it by the number of cores (4 cores running