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package daemon // import "github.com/docker/docker/daemon"
import (
"context"
containertypes "github.com/docker/docker/api/types/container"
"github.com/docker/docker/container"
"github.com/docker/docker/errdefs"
"github.com/docker/docker/internal/platform"
)
func (daemon *Daemon) stats(c *container.Container) (*containertypes.StatsResponse, error) {
c.Lock()
task, err := c.GetRunningTask()
c.Unlock()
if err != nil {
return nil, err
}
// Obtain the stats from HCS via libcontainerd
stats, err := task.Stats(context.Background())
if err != nil {
if errdefs.IsNotFound(err) {
return nil, containerNotFound(c.ID)
}
return nil, err
}
// Start with an empty structure
s := &containertypes.StatsResponse{}
s.Stats.Read = stats.Read
s.Stats.NumProcs = platform.NumProcs()
if stats.HCSStats != nil {
hcss := stats.HCSStats
// Populate the CPU/processor statistics
s.CPUStats = containertypes.CPUStats{
CPUUsage: containertypes.CPUUsage{
TotalUsage: hcss.Processor.TotalRuntime100ns,
UsageInKernelmode: hcss.Processor.RuntimeKernel100ns,
UsageInUsermode: hcss.Processor.RuntimeUser100ns,
},
}
// Populate the memory statistics
s.MemoryStats = containertypes.MemoryStats{
Commit: hcss.Memory.UsageCommitBytes,
CommitPeak: hcss.Memory.UsageCommitPeakBytes,
PrivateWorkingSet: hcss.Memory.UsagePrivateWorkingSetBytes,
}
// Populate the storage statistics
s.StorageStats = containertypes.StorageStats{
ReadCountNormalized: hcss.Storage.ReadCountNormalized,
ReadSizeBytes: hcss.Storage.ReadSizeBytes,
WriteCountNormalized: hcss.Storage.WriteCountNormalized,
WriteSizeBytes: hcss.Storage.WriteSizeBytes,
}
// Populate the network statistics
s.Networks = make(map[string]containertypes.NetworkStats)
for _, nstats := range hcss.Network {
s.Networks[nstats.EndpointId] = containertypes.NetworkStats{
RxBytes: nstats.BytesReceived,
RxPackets: nstats.PacketsReceived,
RxDropped: nstats.DroppedPacketsIncoming,
TxBytes: nstats.BytesSent,
TxPackets: nstats.PacketsSent,
TxDropped: nstats.DroppedPacketsOutgoing,
}
}
}
return s, nil
}
// Windows network stats are obtained directly through HCS, hence this is a no-op.
func (daemon *Daemon) getNetworkStats(c *container.Container) (map[string]containertypes.NetworkStats, error) {
return make(map[string]containertypes.NetworkStats), nil
}
// getSystemCPUUsage returns the host system's cpu usage in
// nanoseconds and number of online CPUs. An error is returned
// if the format of the underlying file does not match.
// This is a no-op on Windows.
func getSystemCPUUsage() (uint64, uint32, error) {
return 0, 0, nil
}
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