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metrics.go
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package main
import (
"os"
"runtime"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/shirou/gopsutil/load"
"github.com/shirou/gopsutil/process"
)
func mainMetrics() {
m := map[string]interface{}{
// RUNTIME
"numcpu": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_cpu_count",
Help: "The number of CPU's the app runtime can see",
}),
"numgo": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_goroutine_count",
Help: "The number of running goroutines",
}),
"lookups": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_lookups",
Help: "Number of pointer lookups performed by the runtime",
}),
"mallocs": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_heap_allocs",
Help: "Cumulative count of heap objects allocated",
}),
"frees": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_heap_frees",
Help: "Cumulative count of freed heap objects",
}),
"heap_alloc": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_heap_used_bytes",
Help: "Total bytes used by the heap",
}),
"heap_total": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_heap_total_bytes",
Help: "Total bytes available for the heap",
}),
"heap_idle": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_heap_idle_bytes",
Help: "Bytes in idle (unused) spans",
}),
"heap_inuse": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_heap_inuse_bytes",
Help: "Bytes in in-use spans",
}),
"heap_released": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_heap_released_bytes",
Help: "Bytes of memory returned to the OS",
}),
"heap_objects": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_heap_objects_count",
Help: "Number of objects in the heap",
}),
"gc_num": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_gc_count",
Help: "Number of times the garbage collector has run",
}),
"gc_pause": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_runtime_gc_pause_ms",
Help: "Number of miliseconds the garbage collector has paused the program",
}), // PSUTIL
"proc_cpu": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_process_cpu_pct",
Help: "The percent of CPU that the cave process uses",
}),
"proc_children": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_process_child_count",
Help: "The number of child processes of the main PID",
}),
"net_conns": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_process_network_connection_count",
Help: "The number of network connections the process owns",
}),
"proc_uptime": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_process_uptime",
Help: "Process uptime",
}),
"proc_io": promauto.NewGaugeVec(prometheus.GaugeOpts{
Name: "cave_process_io_bytes",
Help: "Process IO in bytes",
}, []string{"op"}),
"proc_mempct": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_process_mem_pct",
Help: "Process memory usage as pct of total system mem",
}),
"proc_net_io": promauto.NewGaugeVec(prometheus.GaugeOpts{
Name: "cave_process_network_io_bytes",
Help: "Process network IO in bytes",
}, []string{"op"}),
"proc_ctx": promauto.NewGaugeVec(prometheus.GaugeOpts{
Name: "cave_process_ctx_switch_count",
Help: "Process context switches",
}, []string{"type"}),
"proc_fd": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_process_fd_count",
Help: "Number of fd's the process has open",
}),
"proc_threads": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_process_thread_count",
Help: "Number of threads associated with the process",
}),
"proc_files": promauto.NewGauge(prometheus.GaugeOpts{
Name: "cave_process_open_files_count",
Help: "Number of open files assocaited with the process",
}),
"load": promauto.NewGaugeVec(prometheus.GaugeOpts{
Name: "cave_host_cpu_load",
Help: "Load statistics for the host",
}, []string{"interval"}),
}
// IMPLEMENT!
for {
var memstats runtime.MemStats
runtime.ReadMemStats(&memstats)
pausems := time.Nanosecond * time.Duration(memstats.PauseTotalNs)
m["numcpu"].(prometheus.Gauge).Set(float64(runtime.GOMAXPROCS(0)))
m["numgo"].(prometheus.Gauge).Set(float64(runtime.NumGoroutine()))
m["lookups"].(prometheus.Gauge).Set(float64(memstats.Lookups))
m["mallocs"].(prometheus.Gauge).Set(float64(memstats.Mallocs))
m["frees"].(prometheus.Gauge).Set(float64(memstats.Frees))
m["heap_alloc"].(prometheus.Gauge).Set(float64(memstats.HeapAlloc))
m["heap_total"].(prometheus.Gauge).Set(float64(memstats.HeapSys))
m["heap_idle"].(prometheus.Gauge).Set(float64(memstats.HeapIdle))
m["heap_inuse"].(prometheus.Gauge).Set(float64(memstats.HeapInuse))
m["heap_released"].(prometheus.Gauge).Set(float64(memstats.HeapReleased))
m["heap_objects"].(prometheus.Gauge).Set(float64(memstats.HeapObjects))
m["gc_num"].(prometheus.Gauge).Set(float64(memstats.NumGC))
m["gc_pause"].(prometheus.Gauge).Set(float64(pausems.Milliseconds()))
p, err := process.NewProcess(int32(os.Getpid()))
if err != nil {
continue
}
cpu, err := p.CPUPercent()
check(err)
m["proc_cpu"].(prometheus.Gauge).Set(float64(cpu))
children, err := p.Children()
check(err)
m["proc_children"].(prometheus.Gauge).Set(float64(len(children)))
netconns, err := p.Connections()
check(err)
m["net_conns"].(prometheus.Gauge).Set(float64(len(netconns)))
stime, err := p.CreateTime()
check(err)
uptime := (time.Millisecond * time.Duration(stime)).Seconds()
m["proc_uptime"].(prometheus.Gauge).Set(float64(time.Now().Unix() - int64(uptime)))
io, err := p.IOCounters()
check(err)
m["proc_io"].(*prometheus.GaugeVec).WithLabelValues("read_bytes").Set(float64(io.ReadBytes))
m["proc_io"].(*prometheus.GaugeVec).WithLabelValues("write_bytes").Set(float64(io.WriteBytes))
mem, err := p.MemoryPercent()
check(err)
m["proc_mempct"].(prometheus.Gauge).Set(float64(mem))
netio, err := p.NetIOCounters(false)
check(err)
m["proc_net_io"].(*prometheus.GaugeVec).WithLabelValues("tx_bytes").Set(float64(netio[0].BytesSent))
m["proc_net_io"].(*prometheus.GaugeVec).WithLabelValues("rx_bytes").Set(float64(netio[0].BytesRecv))
ctx, err := p.NumCtxSwitches()
check(err)
m["proc_ctx"].(*prometheus.GaugeVec).WithLabelValues("voluntary").Set(float64(ctx.Voluntary))
m["proc_ctx"].(*prometheus.GaugeVec).WithLabelValues("involuntary").Set(float64(ctx.Involuntary))
fd, err := p.NumFDs()
check(err)
m["proc_fd"].(prometheus.Gauge).Set(float64(fd))
thr, err := p.NumThreads()
check(err)
m["proc_threads"].(prometheus.Gauge).Set(float64(thr))
fls, err := p.OpenFiles()
check(err)
m["proc_files"].(prometheus.Gauge).Set(float64(len(fls)))
ld, err := load.Avg()
check(err)
m["load"].(*prometheus.GaugeVec).WithLabelValues("1").Set(ld.Load1)
m["load"].(*prometheus.GaugeVec).WithLabelValues("5").Set(ld.Load5)
m["load"].(*prometheus.GaugeVec).WithLabelValues("15").Set(ld.Load15)
time.Sleep(2 * time.Second)
}
}
func check(e error) {
return
}
// Returns a JSON schema for the cave Grafana Dashboard
func getDashboard() []byte {
return []byte(`{
"annotations": {
"list": [
{
"builtIn": 1,
"datasource": "-- Grafana --",
"enable": true,
"hide": true,
"iconColor": "rgba(0, 211, 255, 1)",
"name": "Annotations & Alerts",
"type": "dashboard"
}
]
},
"description": "Official cave dashboard",
"editable": true,
"gnetId": null,
"graphTooltip": 0,
"id": 1,
"links": [],
"panels": [
{
"aliasColors": {},
"bars": false,
"dashLength": 10,
"dashes": false,
"datasource": null,
"fill": 1,
"fillGradient": 0,
"gridPos": {
"h": 8,
"w": 5,
"x": 0,
"y": 0
},
"hiddenSeries": false,
"id": 4,
"legend": {
"avg": false,
"current": false,
"max": false,
"min": false,
"show": true,
"total": false,
"values": false
},
"lines": true,
"linewidth": 1,
"nullPointMode": "null",
"options": {
"dataLinks": []
},
"percentage": false,
"pointradius": 2,
"points": false,
"renderer": "flot",
"seriesOverrides": [],
"spaceLength": 10,
"stack": false,
"steppedLine": false,
"targets": [
{
"expr": "cave_process_cpu_pct",
"instant": false,
"legendFormat": "{{instance}}",
"refId": "A"
}
],
"thresholds": [],
"timeFrom": null,
"timeRegions": [],
"timeShift": null,
"title": "Process CPU%",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"format": "percent",
"label": null,
"logBase": 1,
"max": "100",
"min": null,
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
},
{
"aliasColors": {},
"bars": false,
"cacheTimeout": null,
"dashLength": 10,
"dashes": false,
"datasource": null,
"fill": 1,
"fillGradient": 0,
"gridPos": {
"h": 8,
"w": 5,
"x": 5,
"y": 0
},
"hiddenSeries": false,
"id": 12,
"legend": {
"avg": false,
"current": false,
"max": false,
"min": false,
"show": true,
"total": false,
"values": false
},
"lines": true,
"linewidth": 1,
"links": [],
"nullPointMode": "null",
"options": {
"dataLinks": []
},
"percentage": false,
"pluginVersion": "6.5.2",
"pointradius": 2,
"points": false,
"renderer": "flot",
"seriesOverrides": [],
"spaceLength": 10,
"stack": true,
"steppedLine": false,
"targets": [
{
"expr": "cave_cluster_network_size",
"instant": false,
"legendFormat": "{{instance}}",
"refId": "A"
}
],
"thresholds": [],
"timeFrom": null,
"timeRegions": [],
"timeShift": null,
"title": "Cluster Network Size",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": "0",
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": false
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
},
{
"aliasColors": {},
"bars": false,
"dashLength": 10,
"dashes": false,
"datasource": null,
"fill": 1,
"fillGradient": 0,
"gridPos": {
"h": 8,
"w": 5,
"x": 10,
"y": 0
},
"hiddenSeries": false,
"id": 6,
"legend": {
"avg": false,
"current": false,
"max": false,
"min": false,
"show": true,
"total": false,
"values": false
},
"lines": true,
"linewidth": 1,
"nullPointMode": "null",
"options": {
"dataLinks": []
},
"percentage": false,
"pointradius": 2,
"points": false,
"renderer": "flot",
"seriesOverrides": [],
"spaceLength": 10,
"stack": false,
"steppedLine": false,
"targets": [
{
"expr": "cave_process_mem_pct",
"legendFormat": "{{instance}}",
"refId": "A"
}
],
"thresholds": [],
"timeFrom": null,
"timeRegions": [],
"timeShift": null,
"title": "Process Memory %",
"tooltip": {
"shared": true,
"sort": 0,
"value_type": "individual"
},
"type": "graph",
"xaxis": {
"buckets": null,
"mode": "time",
"name": null,
"show": true,
"values": []
},
"yaxes": [
{
"format": "percent",
"label": null,
"logBase": 1,
"max": "100",
"min": null,
"show": true
},
{
"format": "short",
"label": null,
"logBase": 1,
"max": null,
"min": null,
"show": true
}
],
"yaxis": {
"align": false,
"alignLevel": null
}
},
{
"aliasColors": {},
"bars": false,
"dashLength": 10,
"dashes": false,
"datasource": null,
"fill": 1,
"fillGradient": 0,
"gridPos": {
"h": 8,
"w": 5,
"x": 15,
"y": 0
},
"hiddenSeries": false,
"id": 16,
"legend": {
"avg": false,
"current": false,
"max": false,
"min": false,
"show": true,
"total": false,
"values": false
},
"lines": true,
"linewidth": 1,
"nullPointMode": "null",
"options": {
"dataLinks": []
},
"percentage": false,
"pointradius": 2,
"points": false,
"renderer": "flot",
"seriesOverrides": [],
"spaceLength": 10,
"stack": false,
"steppedLine": false,
"targets": [
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