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main.go
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main.go
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package main
import (
"compress/gzip"
"context"
"errors"
"flag"
"fmt"
"log"
"maps"
"net/http"
"net/http/httputil"
"net/url"
"os"
"strconv"
"strings"
"time"
"github.com/peterbourgon/ff/v4"
"golang.org/x/sync/errgroup"
"google.golang.org/protobuf/proto"
"sgrankin.dev/netatmo-otel/netatmo"
promclient "github.com/prometheus/client_golang/api"
promapi "github.com/prometheus/client_golang/api/prometheus/v1"
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/common/expfmt"
"github.com/prometheus/common/model"
)
func init() {
log.SetFlags(log.LstdFlags | log.Lmicroseconds | log.Lshortfile)
}
var (
_ = flag.String("config", "", "config file (optional)")
accessToken = flag.String("access-token", "", "Oauth2 Access Token")
refreshToken = flag.String("refresh-token", "", "Oauth2 Refresh Token")
clientID = flag.String("client-id", "", "Oauth2 Client ID")
clientSecret = flag.String("client-secret", "", "Oauth2 Client Secret")
dest = flag.String("dest", "",
"Destination host:port. Must accept Prometheus queries and OTLP pushes at routes matching VictoriaMetrics.")
resume = flag.String("resume", "",
"The resume token that was logged. Will skip as many requests as possible to avoid duplicate work..")
incremental = flag.Bool("incremental", true,
"Query for the last timestamp exported and start scrape from there.")
incrementalSince = flag.Duration("incremental-since", 30*24*time.Hour,
"Query this far back to find the last written sample. If not found, uses -since as the starting point.")
scrapeSince = flag.Duration("since", 0,
"Start scrape this long ago. Set 0 to disable and start from the first recorded sample in netatmo.")
verbose = flag.Bool("verbose", false, "Verbose logging")
)
func init() {
err := ff.Parse(flag.CommandLine, os.Args[1:],
ff.WithEnvVars(),
ff.WithConfigFileFlag("config"),
ff.WithConfigFileParser(ff.PlainParser),
)
switch {
case err == nil:
case errors.Is(err, flag.ErrHelp):
flag.Usage()
os.Exit(2)
default:
log.Fatal(err)
}
}
func main() {
ctx := context.Background()
var exporter expfmt.Encoder
if *dest != "" {
r, w, err := os.Pipe()
if err != nil {
log.Fatal(err)
}
g := &errgroup.Group{}
g.Go(func() error {
req, err := http.NewRequestWithContext(ctx, "POST", (&url.URL{
Scheme: "http", Host: *dest, Path: "/api/v1/import/prometheus",
}).String(), r)
if err != nil {
return err
}
req.Header.Set("Content-Encoding", "gzip")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return err
}
if *verbose {
dump, err := httputil.DumpResponse(resp, true)
if err != nil {
return err
}
log.Printf("response:\n%s", dump)
}
return nil
})
defer func() {
log.Print("waiting on upload to complete")
if err := g.Wait(); err != nil {
log.Fatal(err)
}
}()
defer w.Close()
gzw := gzip.NewWriter(w)
defer gzw.Close()
exporter = expfmt.NewEncoder(gzw, expfmt.FmtText)
} else {
exporter = expfmt.NewEncoder(os.Stdout, expfmt.FmtText)
}
exporter.Encode(&dto.MetricFamily{
Metric: []*dto.Metric{{}},
})
client := netatmo.NewClient(ctx, *clientID, *clientSecret, *accessToken, *refreshToken)
promClient, err := promclient.NewClient(promclient.Config{Address: "http://" + *dest})
if err != nil {
log.Fatal(err)
}
promAPI := promapi.NewAPI(promClient)
stations, err := client.GetStations(ctx)
if err != nil {
log.Fatal(err)
}
for _, dev := range stations {
if *verbose {
log.Printf("exporting device %q", dev.ID)
}
commonAttrs := map[string]string{
"home_id": dev.HomeID,
"home_name": dev.HomeName,
}
attrs := maps.Clone(commonAttrs)
maps.Copy(attrs, map[string]string{
"dev_id": string(dev.ID),
"module_name": dev.Name,
"module_type": string(dev.Type),
// attribute.Int("firmware", dev.Firmware),
})
exportHistory(ctx, client, promAPI, exporter, attrs, dev.ID, "", dev.DataTypes)
for _, mod := range dev.Modules {
if *verbose {
log.Printf("exporting device %q module %q", dev.ID, mod.ID)
}
attrs := maps.Clone(commonAttrs)
maps.Copy(attrs, map[string]string{
"dev_id": string(mod.ID),
"module_name": mod.Name,
"module_type": string(mod.Type),
// attribute.Int("firmware", dev.Firmware),
})
exportHistory(ctx, client, promAPI, exporter, attrs, dev.ID, mod.ID, mod.DataTypes)
}
}
}
func exportHistory(
ctx context.Context,
client *netatmo.Client, promAPI promapi.API,
exporter expfmt.Encoder, attrs map[string]string,
device netatmo.DeviceID, module netatmo.ModuleID,
dataTypes []netatmo.DataType,
) {
var since time.Time
if *incremental {
val, _, err := promAPI.Query(ctx,
fmt.Sprintf("timestamp(netatmo_%s[%s])", strings.ToLower(string(dataTypes[0])), incrementalSince.String()),
time.Now())
if err != nil {
log.Fatal(err)
}
vec := val.(model.Vector)
for _, sample := range vec {
if module != "" && string(sample.Metric["dev_id"]) == string(module) || module == "" && string(sample.Metric["dev_id"]) == string(device) {
since = time.Unix(int64(sample.Value), 0).Add(time.Second)
break
}
}
}
if since.IsZero() && *scrapeSince != 0 {
since = time.Now().Add(-*scrapeSince)
}
// Resume token present?
if *resume != "" {
r := strings.Split(*resume, "/")
if r[0] != string(device) || r[1] != string(module) {
// Token was given and it has some other module.. probably skip ahead.
return
}
sec, err := strconv.Atoi(r[2])
if err != nil {
log.Fatal(err)
}
since = time.Unix(int64(sec), 0)
*resume = ""
}
labels := []*dto.LabelPair{}
for k, v := range attrs {
labels = append(labels, &dto.LabelPair{
Name: ptr(string(k)),
Value: ptr(string(v)),
})
}
err := client.GetMeasure(ctx, device, module, dataTypes, since, func(points []netatmo.DataPoint, nextTime time.Time) error {
// Gauges contain the datapoints.
for i, dt := range dataTypes {
// MetricFamily gives the gauges a name and units.
mf := &dto.MetricFamily{
Name: ptr("netatmo_" + strings.ToLower(string(dt))),
Type: dto.MetricType_GAUGE.Enum(),
}
for _, point := range points {
mf.Metric = append(mf.Metric,
&dto.Metric{
Label: labels,
TimestampMs: proto.Int64(point.Time.UnixMilli()),
Gauge: &dto.Gauge{
Value: proto.Float64(point.Values[i]),
},
})
}
if *verbose {
log.Printf("Exporting %d datapoints", len(mf.Metric))
}
if err := exporter.Encode(mf); err != nil {
return err
}
}
if *verbose {
log.Printf("Resume token: %s/%s/%d", device, module, nextTime.Unix())
}
return nil
})
if err != nil {
log.Fatal(err)
}
}
func ptr[T any](v T) *T { return &v }