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The Docker daemon's API returns different values on Windows and non-Windows systems. This impacts the calculation of `cpuPct` and `usedMemory` for each container. The systems are disciminate on the `Server` header send by the server. Uses the unix stats calculation in case the header is not set. `docker stats` implementation for reference: https://github.com/docker/cli/blob/master/cli/command/container/stats_helpers.go#L100 Co-authored-by: Benoit VIRY <benoit.viry@cgx-group.com>
136 lines
4.0 KiB
Go
136 lines
4.0 KiB
Go
package container
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import "time"
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// Docker container info from /containers/json
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type ApiInfo struct {
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Id string
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IdShort string
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Names []string
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Status string
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// Image string
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// ImageID string
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// Command string
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// Created int64
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// Ports []Port
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// SizeRw int64 `json:",omitempty"`
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// SizeRootFs int64 `json:",omitempty"`
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// Labels map[string]string
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// State string
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// HostConfig struct {
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// NetworkMode string `json:",omitempty"`
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// Annotations map[string]string `json:",omitempty"`
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// }
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// NetworkSettings *SummaryNetworkSettings
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// Mounts []MountPoint
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}
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// Docker container resources from /containers/{id}/stats
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type ApiStats struct {
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// Common stats
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Read time.Time `json:"read"`
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// PreRead time.Time `json:"preread"`
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// Linux specific stats, not populated on Windows.
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// PidsStats PidsStats `json:"pids_stats,omitempty"`
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// BlkioStats BlkioStats `json:"blkio_stats,omitempty"`
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// Windows specific stats, not populated on Linux.
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NumProcs uint32 `json:"num_procs"`
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// StorageStats StorageStats `json:"storage_stats,omitempty"`
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// Networks request version >=1.21
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Networks map[string]NetworkStats
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// Shared stats
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CPUStats CPUStats `json:"cpu_stats,omitempty"`
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// PreCPUStats CPUStats `json:"precpu_stats,omitempty"` // "Pre"="Previous"
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MemoryStats MemoryStats `json:"memory_stats,omitempty"`
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}
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type CPUStats struct {
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// CPU Usage. Linux and Windows.
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CPUUsage CPUUsage `json:"cpu_usage"`
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// System Usage. Linux only.
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SystemUsage uint64 `json:"system_cpu_usage,omitempty"`
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// Online CPUs. Linux only.
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// OnlineCPUs uint32 `json:"online_cpus,omitempty"`
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// Throttling Data. Linux only.
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// ThrottlingData ThrottlingData `json:"throttling_data,omitempty"`
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}
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type CPUUsage struct {
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// Total CPU time consumed.
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// Units: nanoseconds (Linux)
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// Units: 100's of nanoseconds (Windows)
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TotalUsage uint64 `json:"total_usage"`
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// Total CPU time consumed per core (Linux). Not used on Windows.
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// Units: nanoseconds.
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// PercpuUsage []uint64 `json:"percpu_usage,omitempty"`
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// Time spent by tasks of the cgroup in kernel mode (Linux).
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// Time spent by all container processes in kernel mode (Windows).
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// Units: nanoseconds (Linux).
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// Units: 100's of nanoseconds (Windows). Not populated for Hyper-V Containers.
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// UsageInKernelmode uint64 `json:"usage_in_kernelmode"`
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// Time spent by tasks of the cgroup in user mode (Linux).
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// Time spent by all container processes in user mode (Windows).
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// Units: nanoseconds (Linux).
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// Units: 100's of nanoseconds (Windows). Not populated for Hyper-V Containers
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// UsageInUsermode uint64 `json:"usage_in_usermode"`
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}
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type MemoryStats struct {
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// current res_counter usage for memory
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Usage uint64 `json:"usage,omitempty"`
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// all the stats exported via memory.stat.
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Stats MemoryStatsStats `json:"stats,omitempty"`
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// maximum usage ever recorded.
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// MaxUsage uint64 `json:"max_usage,omitempty"`
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// TODO(vishh): Export these as stronger types.
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// number of times memory usage hits limits.
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// Failcnt uint64 `json:"failcnt,omitempty"`
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// Limit uint64 `json:"limit,omitempty"`
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// // committed bytes
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// Commit uint64 `json:"commitbytes,omitempty"`
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// // peak committed bytes
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// CommitPeak uint64 `json:"commitpeakbytes,omitempty"`
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// // private working set
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PrivateWorkingSet uint64 `json:"privateworkingset,omitempty"`
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}
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type MemoryStatsStats struct {
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Cache uint64 `json:"cache,omitempty"`
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InactiveFile uint64 `json:"inactive_file,omitempty"`
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}
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type NetworkStats struct {
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// Bytes received. Windows and Linux.
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RxBytes uint64 `json:"rx_bytes"`
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// Bytes sent. Windows and Linux.
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TxBytes uint64 `json:"tx_bytes"`
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}
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type prevNetStats struct {
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Sent uint64
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Recv uint64
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Time time.Time
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}
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// Docker container stats
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type Stats struct {
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Name string `json:"n"`
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Cpu float64 `json:"c"`
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Mem float64 `json:"m"`
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NetworkSent float64 `json:"ns"`
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NetworkRecv float64 `json:"nr"`
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PrevCpu [2]uint64 `json:"-"`
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PrevNet prevNetStats `json:"-"`
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PrevRead time.Time `json:"-"`
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}
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