Add prom exporter
This commit is contained in:
parent
2c99912a8a
commit
3b53190410
3 changed files with 93 additions and 10 deletions
63
exporter.go
63
exporter.go
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@ -9,6 +9,8 @@ package main
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import (
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"flag"
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"fmt"
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"log"
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"net/http"
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"os"
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"os/signal"
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"regexp"
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@ -16,6 +18,10 @@ import (
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"syscall"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/client_golang/prometheus/promauto"
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"github.com/prometheus/client_golang/prometheus/promhttp"
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"periph.io/x/conn/v3/i2c/i2creg"
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"periph.io/x/conn/v3/physic"
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"periph.io/x/devices/v3/ina219"
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@ -26,8 +32,9 @@ func mainImpl() error {
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if _, err := host.Init(); err != nil {
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return err
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}
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address := flag.Int("address", 0x45, "I²C address")
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i2cbus := flag.String("bus", "", "I²C bus (/dev/i2c-1)")
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httpAddr := flag.String("http-address", ":9455", "Listen addr for HTTP handler")
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i2cAddress := flag.Int("i2c-address", 0x45, "I²C address")
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i2cBus := flag.String("i2c-bus", "", "I²C bus (/dev/i2c-1)")
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senseResistor := flag.String("sense-resistor", "10m", "Resistance of the shunt resistor in ohms (optionally with suffix m = milli, {µ,mu} = micro, n = nano)")
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maxCurrent := flag.String("max-current", "8", "Maximum current through the device in amps (optional suffix as for --sense-resistor)")
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@ -53,14 +60,14 @@ func mainImpl() error {
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}
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// Open default I²C bus.
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bus, err := i2creg.Open(*i2cbus)
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bus, err := i2creg.Open(*i2cBus)
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if err != nil {
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return fmt.Errorf("failed to open I²C: %v", err)
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}
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defer bus.Close()
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sensor, err := ina219.New(bus, &ina219.Opts{
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Address: *address,
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Address: *i2cAddress,
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SenseResistor: resistor,
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MaxCurrent: current,
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})
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@ -68,13 +75,51 @@ func mainImpl() error {
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return fmt.Errorf("failed to open new sensor: %v", err)
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}
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constLabels := prometheus.Labels{"i2c-addr": fmt.Sprintf("0x%x", *i2cAddress)}
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busVoltageHist := promauto.NewHistogram(prometheus.HistogramOpts{
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Namespace: "ina219",
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Name: "bus_voltage",
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Help: "Bus voltage (V)",
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ConstLabels: constLabels,
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NativeHistogramBucketFactor: 1.001,
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NativeHistogramZeroThreshold: 0.001,
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})
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busCurrentHist := promauto.NewHistogram(prometheus.HistogramOpts{
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Namespace: "ina219",
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Name: "bus_current",
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Help: "Bus current (A)",
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ConstLabels: constLabels,
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NativeHistogramBucketFactor: 1.001,
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NativeHistogramZeroThreshold: 0.001,
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})
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busPowerHist := promauto.NewHistogram(prometheus.HistogramOpts{
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Namespace: "ina219",
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Name: "bus_power",
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Help: "Bus power (W)",
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ConstLabels: constLabels,
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NativeHistogramBucketFactor: 1.001,
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NativeHistogramZeroThreshold: 0.001,
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})
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shuntVoltageHist := promauto.NewHistogram(prometheus.HistogramOpts{
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Namespace: "ina219",
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Name: "shunt_voltage",
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Help: "Shunt voltage (V)",
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ConstLabels: constLabels,
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NativeHistogramBucketFactor: 1.001,
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NativeHistogramZeroThreshold: 0.001,
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})
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go func() {
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http.Handle("/metrics", promhttp.Handler())
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log.Fatal(http.ListenAndServe(*httpAddr, nil))
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}()
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// Read values from sensor every second.
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everySecond := time.NewTicker(time.Second).C
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var halt = make(chan os.Signal, 1)
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halt := make(chan os.Signal, 1)
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signal.Notify(halt, syscall.SIGTERM)
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signal.Notify(halt, syscall.SIGINT)
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fmt.Println("ctrl+c to exit")
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for {
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select {
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case <-everySecond:
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@ -82,7 +127,11 @@ func mainImpl() error {
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if err != nil {
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return fmt.Errorf("sensor reading error: %v", err)
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}
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fmt.Println(p)
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busVoltageHist.Observe(float64(p.Voltage) / float64(physic.Volt))
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busCurrentHist.Observe(float64(p.Current) / float64(physic.Ampere))
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busPowerHist.Observe(float64(p.Power) / float64(physic.Watt))
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shuntVoltageHist.Observe(float64(p.Shunt) / float64(physic.Volt))
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case <-halt:
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return nil
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}
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14
go.mod
14
go.mod
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@ -3,8 +3,20 @@ module gitea.drjosh.dev/josh/ina219-exporter
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go 1.23.1
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require (
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github.com/dustin/go-humanize v1.0.1
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github.com/prometheus/client_golang v1.20.4
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periph.io/x/conn/v3 v3.7.1
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periph.io/x/devices/v3 v3.7.1
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periph.io/x/host/v3 v3.8.2
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)
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require (
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github.com/beorn7/perks v1.0.1 // indirect
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github.com/cespare/xxhash/v2 v2.3.0 // indirect
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github.com/klauspost/compress v1.17.9 // indirect
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github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
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github.com/prometheus/client_model v0.6.1 // indirect
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github.com/prometheus/common v0.55.0 // indirect
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github.com/prometheus/procfs v0.15.1 // indirect
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golang.org/x/sys v0.22.0 // indirect
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google.golang.org/protobuf v1.34.2 // indirect
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)
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26
go.sum
26
go.sum
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@ -1,7 +1,29 @@
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github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
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github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
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github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
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github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
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github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
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github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
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github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
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github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
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github.com/jonboulle/clockwork v0.4.0 h1:p4Cf1aMWXnXAUh8lVfewRBx1zaTSYKrKMF2g3ST4RZ4=
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github.com/jonboulle/clockwork v0.4.0/go.mod h1:xgRqUGwRcjKCO1vbZUEtSLrqKoPSsUpK7fnezOII0kc=
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github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
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github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
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github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
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github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
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github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
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github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
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github.com/prometheus/client_golang v1.20.4 h1:Tgh3Yr67PaOv/uTqloMsCEdeuFTatm5zIq5+qNN23vI=
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github.com/prometheus/client_golang v1.20.4/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
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github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
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github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
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github.com/prometheus/common v0.55.0 h1:KEi6DK7lXW/m7Ig5i47x0vRzuBsHuvJdi5ee6Y3G1dc=
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github.com/prometheus/common v0.55.0/go.mod h1:2SECS4xJG1kd8XF9IcM1gMX6510RAEL65zxzNImwdc8=
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github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
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github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
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golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
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golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
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google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
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periph.io/x/conn/v3 v3.7.1 h1:tMjNv3WO8jEz/ePuXl7y++2zYi8LsQ5otbmqGKy3Myg=
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periph.io/x/conn/v3 v3.7.1/go.mod h1:c+HCVjkzbf09XzcqZu/t+U8Ss/2QuJj0jgRF6Nye838=
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periph.io/x/devices/v3 v3.7.1 h1:BsExlfYJlZUZoawzpMF7ksgC9f1eBAdqvKRCGvb+VYw=
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