forked from signalfx/signalfx-agent
/
conversion.go
200 lines (170 loc) · 7.23 KB
/
conversion.go
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package docker
import (
"strconv"
"strings"
"time"
dtypes "github.com/docker/docker/api/types"
"github.com/signalfx/golib/datapoint"
"github.com/signalfx/golib/sfxclient"
)
var memoryStatCounters = map[string]bool{
"pgfault": true,
"pgmajfault": true,
"pgpgin": true,
"pgpgout": true,
"total_pgfault": true,
"total_pgmajfault": true,
"total_pgpgin": true,
"total_pgpgout": true,
}
var basicBlockIOMetrics = map[string]bool{
"blkio.io_service_bytes_recursive.read": true,
"blkio.io_service_bytes_recursive.write": true,
}
// ConvertStatsToMetrics converts a docker container stats object into an array of datapoints
func ConvertStatsToMetrics(container *dtypes.ContainerJSON, parsed *dtypes.StatsJSON, enhancedMetricsConfig EnhancedMetricsConfig) ([]*datapoint.Datapoint, error) {
var dps []*datapoint.Datapoint
dps = append(dps, convertBlkioStats(&parsed.BlkioStats, enhancedMetricsConfig.EnableExtraBlockIOMetrics)...)
dps = append(dps, convertCPUStats(&parsed.CPUStats, &parsed.PreCPUStats, enhancedMetricsConfig.EnableExtraCPUMetrics)...)
dps = append(dps, convertMemoryStats(&parsed.MemoryStats, enhancedMetricsConfig.EnableExtraMemoryMetrics)...)
dps = append(dps, convertNetworkStats(&parsed.Networks, enhancedMetricsConfig.EnableExtraNetworkMetrics)...)
now := time.Now()
for i := range dps {
dps[i].Timestamp = now
if dps[i].Dimensions == nil {
dps[i].Dimensions = map[string]string{}
}
// Set to preverse compatibility with docker-collectd plugin
dps[i].Dimensions["plugin"] = "docker"
name := strings.TrimPrefix(container.Name, "/")
dps[i].Dimensions["container_name"] = name
// Duplicate container_name in plugin_instance to maintain compat with
// collectd-docker plugin
dps[i].Dimensions["plugin_instance"] = name
dps[i].Dimensions["container_image"] = container.Config.Image
dps[i].Dimensions["container_id"] = container.ID
dps[i].Dimensions["container_hostname"] = container.Config.Hostname
}
return dps, nil
}
func convertBlkioStats(stats *dtypes.BlkioStats, enhancedMetrics bool) []*datapoint.Datapoint {
var out []*datapoint.Datapoint
for k, v := range map[string][]dtypes.BlkioStatEntry{
"io_service_bytes_recursive": stats.IoServiceBytesRecursive,
"io_serviced_recursive": stats.IoServicedRecursive,
"io_queue_recursive": stats.IoQueuedRecursive,
"io_service_time_recursive": stats.IoServiceTimeRecursive,
"io_wait_time_recursive": stats.IoWaitTimeRecursive,
"io_merged_recursive": stats.IoMergedRecursive,
"io_time_recursive": stats.IoTimeRecursive,
"sectors_recursive": stats.SectorsRecursive,
} {
for _, bs := range v {
metricName := "blkio." + k + "." + strings.ToLower(bs.Op)
if _, exists := basicBlockIOMetrics[metricName]; enhancedMetrics || exists {
dims := map[string]string{
"device_major": strconv.FormatUint(bs.Major, 10),
"device_minor": strconv.FormatUint(bs.Minor, 10),
}
out = append(out, sfxclient.Cumulative("blkio."+k+"."+strings.ToLower(bs.Op), dims, int64(bs.Value)))
}
}
}
return out
}
func convertCPUStats(stats *dtypes.CPUStats, prior *dtypes.CPUStats, enhancedMetrics bool) []*datapoint.Datapoint {
var out []*datapoint.Datapoint
out = append(out, []*datapoint.Datapoint{
sfxclient.Cumulative("cpu.usage.total", nil, int64(stats.CPUUsage.TotalUsage)),
sfxclient.Cumulative("cpu.usage.system", nil, int64(stats.SystemUsage)),
}...)
// Except two metrics above, everything else will be added only when enhnacedMetrics is enabled
if enhancedMetrics {
out = append(out, []*datapoint.Datapoint{
sfxclient.Cumulative("cpu.usage.kernelmode", nil, int64(stats.CPUUsage.UsageInKernelmode)),
sfxclient.Cumulative("cpu.usage.usermode", nil, int64(stats.CPUUsage.UsageInUsermode)),
}...)
for i, v := range stats.CPUUsage.PercpuUsage {
dims := map[string]string{
"core": "cpu" + strconv.Itoa(i),
}
out = append(out, sfxclient.Cumulative("cpu.percpu.usage", dims, int64(v)))
}
out = append(out, []*datapoint.Datapoint{
sfxclient.Cumulative("cpu.throttling_data.periods", nil, int64(stats.ThrottlingData.Periods)),
sfxclient.Cumulative("cpu.throttling_data.throttled_periods", nil, int64(stats.ThrottlingData.ThrottledPeriods)),
sfxclient.Cumulative("cpu.throttling_data.throttled_time", nil, int64(stats.ThrottlingData.ThrottledTime)),
}...)
out = append(out, sfxclient.GaugeF("cpu.percent", nil, calculateCPUPercent(prior, stats)))
}
return out
}
// Copied from
// https://github.com/docker/cli/blob/dbd96badb6959c2b7070664aecbcf0f7c299c538/cli/command/container/stats_helpers.go
func calculateCPUPercent(previous *dtypes.CPUStats, v *dtypes.CPUStats) float64 {
var (
cpuPercent = 0.0
// calculate the change for the cpu usage of the container in between readings
cpuDelta = float64(v.CPUUsage.TotalUsage) - float64(previous.CPUUsage.TotalUsage)
// calculate the change for the entire system between readings
systemDelta = float64(v.SystemUsage) - float64(previous.SystemUsage)
onlineCPUs = float64(v.OnlineCPUs)
)
if onlineCPUs == 0.0 {
onlineCPUs = float64(len(v.CPUUsage.PercpuUsage))
}
if systemDelta > 0.0 && cpuDelta > 0.0 {
cpuPercent = (cpuDelta / systemDelta) * onlineCPUs * 100.0
}
return cpuPercent
}
func convertMemoryStats(stats *dtypes.MemoryStats, enhancedMetrics bool) []*datapoint.Datapoint {
var out []*datapoint.Datapoint
out = append(out, []*datapoint.Datapoint{
sfxclient.Gauge("memory.usage.limit", nil, int64(stats.Limit)),
sfxclient.Gauge("memory.usage.total", nil, int64(stats.Usage)),
}...)
// Except two metrics above, everything else will be added only when enhnacedMetrics is enabled
if enhancedMetrics {
out = append(out, []*datapoint.Datapoint{
sfxclient.Gauge("memory.usage.max", nil, int64(stats.MaxUsage)),
sfxclient.GaugeF("memory.percent", nil,
// If cache is not present it will use the default value of 0
100.0*(float64(stats.Usage)-float64(stats.Stats["cache"]))/float64(stats.Limit)),
}...)
for k, v := range stats.Stats {
if _, exists := memoryStatCounters[k]; exists {
out = append(out, sfxclient.Cumulative("memory.stats."+k, nil, int64(v)))
} else {
out = append(out, sfxclient.Gauge("memory.stats."+k, nil, int64(v)))
}
}
}
return out
}
func convertNetworkStats(stats *map[string]dtypes.NetworkStats, enhancedMetrics bool) []*datapoint.Datapoint {
if stats == nil {
return nil
}
var out []*datapoint.Datapoint
for k, s := range *stats {
dims := map[string]string{
"interface": k,
}
out = append(out, []*datapoint.Datapoint{
sfxclient.Cumulative("network.usage.rx_bytes", dims, int64(s.RxBytes)),
sfxclient.Cumulative("network.usage.tx_bytes", dims, int64(s.TxBytes)),
}...)
if enhancedMetrics {
out = append(out, []*datapoint.Datapoint{
sfxclient.Cumulative("network.usage.rx_dropped", dims, int64(s.RxDropped)),
sfxclient.Cumulative("network.usage.rx_errors", dims, int64(s.RxErrors)),
sfxclient.Cumulative("network.usage.rx_packets", dims, int64(s.RxPackets)),
sfxclient.Cumulative("network.usage.tx_dropped", dims, int64(s.TxDropped)),
sfxclient.Cumulative("network.usage.tx_errors", dims, int64(s.TxErrors)),
sfxclient.Cumulative("network.usage.tx_packets", dims, int64(s.TxPackets)),
}...)
}
}
return out
}