137 lines
3.6 KiB
Go
137 lines
3.6 KiB
Go
// Command server runs the CDP bulker -- Kafka consumer that batches events
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// into ClickHouse (and other warehouses, when configured).
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package main
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import (
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"context"
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"encoding/json"
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"errors"
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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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"syscall"
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"time"
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"github.com/go-chi/chi/v5"
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"go.uber.org/zap"
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"github.com/dbiz/cdp/ingestion/bulker/internal/batcher"
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"github.com/dbiz/cdp/ingestion/bulker/internal/config"
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"github.com/dbiz/cdp/ingestion/bulker/internal/consumer"
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"github.com/dbiz/cdp/ingestion/bulker/internal/model"
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"github.com/dbiz/cdp/ingestion/bulker/internal/writer"
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)
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func main() {
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if err := run(); err != nil {
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log.Fatal(err)
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}
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}
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func run() error {
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cfg, err := config.Load()
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if err != nil {
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return err
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}
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logger, err := newLogger(cfg.LogLevel)
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if err != nil {
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return err
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}
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defer func() { _ = logger.Sync() }()
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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// ---- ClickHouse -------------------------------------------------------
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ch, err := writer.New(ctx, cfg.ClickHouseAddr, cfg.ClickHouseDB, cfg.ClickHouseUser, cfg.ClickHousePassword)
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if err != nil {
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return err
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}
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defer func() { _ = ch.Close() }()
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// ---- Batcher ---------------------------------------------------------
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b := batcher.New(cfg.BatchSize, cfg.BatchInterval,
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func(ctx context.Context, evs []*model.IngestedEvent) error {
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_, err := ch.WriteEvents(ctx, evs)
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return err
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}, logger)
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go b.Run(ctx)
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// ---- Consumer --------------------------------------------------------
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cons, err := consumer.New(consumer.Config{
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Brokers: cfg.KafkaBrokers,
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Group: cfg.KafkaGroup,
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IngestTopic: cfg.KafkaTopicIngest,
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DLQTopic: cfg.KafkaTopicDLQ,
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}, b, ch, logger)
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if err != nil {
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return err
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}
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defer cons.Close()
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consumerErr := make(chan error, 1)
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go func() { consumerErr <- cons.Run(ctx) }()
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// ---- HTTP (health) ---------------------------------------------------
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r := chi.NewRouter()
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r.Get("/health", func(w http.ResponseWriter, _ *http.Request) {
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writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
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})
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r.Get("/ready", func(w http.ResponseWriter, _ *http.Request) {
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writeJSON(w, http.StatusOK, map[string]string{"status": "ready"})
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})
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srv := &http.Server{
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Addr: cfg.HTTPAddr,
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Handler: r,
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ReadHeaderTimeout: 5 * time.Second,
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}
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httpErr := make(chan error, 1)
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go func() {
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logger.Info("bulker http listening", zap.String("addr", cfg.HTTPAddr))
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if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
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httpErr <- err
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}
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}()
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// ---- Signals ---------------------------------------------------------
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sigCh := make(chan os.Signal, 1)
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signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
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select {
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case <-sigCh:
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logger.Info("shutdown signal received")
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case err := <-consumerErr:
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logger.Error("consumer stopped unexpectedly", zap.Error(err))
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case err := <-httpErr:
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logger.Error("http stopped unexpectedly", zap.Error(err))
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}
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shutCtx, shutCancel := context.WithTimeout(context.Background(), cfg.ShutdownTimeout)
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defer shutCancel()
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cancel() // stop consumer + batcher
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_ = srv.Shutdown(shutCtx)
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_ = b.FlushNow(shutCtx)
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return nil
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}
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func writeJSON(w http.ResponseWriter, status int, body any) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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_ = json.NewEncoder(w).Encode(body)
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}
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func newLogger(level string) (*zap.Logger, error) {
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lvl, err := zap.ParseAtomicLevel(level)
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if err != nil {
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lvl = zap.NewAtomicLevelAt(zap.InfoLevel)
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}
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cfg := zap.NewProductionConfig()
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cfg.Level = lvl
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cfg.EncoderConfig.TimeKey = "ts"
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cfg.EncoderConfig.MessageKey = "msg"
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return cfg.Build()
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}
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