*: Add initial remote-write-receive component

cmd/thanos/main.go

@@ -78,6 +78,7 @@ func main() {
 	registerCompact(cmds, app, "compact")
 	registerBucket(cmds, app, "bucket")
 	registerDownsample(cmds, app, "downsample")
+	registerRemoteWriteReceive(cmds, app, "remote-write-receive")
 
 	cmd, err := app.Parse(os.Args[1:])
 	if err != nil {

cmd/thanos/remote-write-receive.go

@@ -0,0 +1,270 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"math"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/go-kit/kit/log"
+	"github.com/go-kit/kit/log/level"
+	"github.com/improbable-eng/thanos/pkg/cluster"
+	"github.com/improbable-eng/thanos/pkg/component"
+	"github.com/improbable-eng/thanos/pkg/receive"
+	"github.com/improbable-eng/thanos/pkg/runutil"
+	"github.com/improbable-eng/thanos/pkg/store"
+	"github.com/improbable-eng/thanos/pkg/store/storepb"
+	"github.com/oklog/run"
+	opentracing "github.com/opentracing/opentracing-go"
+	"github.com/pkg/errors"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/common/model"
+	"github.com/prometheus/prometheus/storage/tsdb"
+	"google.golang.org/grpc"
+	kingpin "gopkg.in/alecthomas/kingpin.v2"
+)
+
+func registerRemoteWriteReceive(m map[string]setupFunc, app *kingpin.Application, name string) {
+	cmd := app.Command(name, "Accept Prometheus remote write API requests (EXPERIMENTAL, this may change drastically without notice)")
+
+	grpcBindAddr, httpMetricsBindAddr, cert, key, clientCA, newPeerFn := regCommonServerFlags(cmd)
+
+	remoteWriteAddress := cmd.Flag("remote-write.address", "Address to listen on for remote write requests.").
+		Default("0.0.0.0:19291").String()
+
+	dataDir := cmd.Flag("tsdb.path", "Data directory of TSDB.").
+		Default("./data").String()
+
+	m[name] = func(g *run.Group, logger log.Logger, reg *prometheus.Registry, tracer opentracing.Tracer, _ bool) error {
+		peer, err := newPeerFn(logger, reg, false, "", false)
+		if err != nil {
+			return errors.Wrap(err, "new cluster peer")
+		}
+		return runReceiver(
+			g,
+			logger,
+			reg,
+			tracer,
+			*grpcBindAddr,
+			*cert,
+			*key,
+			*clientCA,
+			*httpMetricsBindAddr,
+			*remoteWriteAddress,
+			*dataDir,
+			peer,
+		)
+	}
+}
+
+func runReceiver(
+	g *run.Group,
+	logger log.Logger,
+	reg *prometheus.Registry,
+	tracer opentracing.Tracer,
+	grpcBindAddr string,
+	cert string,
+	key string,
+	clientCA string,
+	httpMetricsBindAddr string,
+	remoteWriteAddress string,
+	dataDir string,
+	peer cluster.Peer,
+) error {
+	level.Info(logger).Log("msg", "setting up receiver")
+
+	var metadata = &promMetadata{
+		// Start out with the full time range. The shipper will constrain it later.
+		// TODO(fabxc): minimum timestamp is never adjusted if shipping is disabled.
+		mint: 0,
+		maxt: math.MaxInt64,
+	}
+
+	tsdbCfg := &tsdb.Options{
+		Retention:        model.Duration(time.Hour * 24 * 15),
+		NoLockfile:       true,
+		MinBlockDuration: model.Duration(time.Hour * 2),
+		MaxBlockDuration: model.Duration(time.Hour * 2),
+	}
+
+	localStorage := &tsdb.ReadyStorage{}
+	receiver := receive.NewWriter(log.With(logger, "component", "receive-writer"), localStorage)
+	webHandler := receive.NewHandler(log.With(logger, "component", "remote-receive-handler"), &receive.Options{
+		Receiver:      receiver,
+		ListenAddress: remoteWriteAddress,
+		Registry:      reg,
+		ReadyStorage:  localStorage,
+	})
+
+	// Start all components while we wait for TSDB to open but only load
+	// initial config and mark ourselves as ready after it completed.
+	dbOpen := make(chan struct{})
+
+	// sync.Once is used to make sure we can close the channel at different execution stages(SIGTERM or when the config is loaded).
+	type closeOnce struct {
+		C     chan struct{}
+		once  sync.Once
+		Close func()
+	}
+	// Wait until the server is ready to handle reloading.
+	reloadReady := &closeOnce{
+		C: make(chan struct{}),
+	}
+	reloadReady.Close = func() {
+		reloadReady.once.Do(func() {
+			close(reloadReady.C)
+		})
+	}
+
+	level.Debug(logger).Log("msg", "setting up joining cluster")
+	{
+		ctx, cancel := context.WithCancel(context.Background())
+		g.Add(func() error {
+			mint, maxt := metadata.Timestamps()
+			if peer != nil {
+				if err := peer.Join(cluster.PeerTypeSource, cluster.PeerMetadata{
+					Labels:  metadata.LabelsPB(),
+					MinTime: mint,
+					MaxTime: maxt,
+				}); err != nil {
+					return errors.Wrap(err, "join cluster")
+				}
+			}
+
+			<-ctx.Done()
+			return nil
+		}, func(err error) {
+			cancel()
+			peer.Close(2 * time.Second)
+		})
+	}
+
+	level.Debug(logger).Log("msg", "setting up endpoint readiness")
+	{
+		// Initial configuration loading.
+		cancel := make(chan struct{})
+		g.Add(
+			func() error {
+				select {
+				case <-dbOpen:
+					break
+				// In case a shutdown is initiated before the dbOpen is released
+				case <-cancel:
+					reloadReady.Close()
+					return nil
+				}
+
+				reloadReady.Close()
+
+				webHandler.Ready()
+				level.Info(logger).Log("msg", "server is ready to receive web requests.")
+				<-cancel
+				return nil
+			},
+			func(err error) {
+				close(cancel)
+			},
+		)
+	}
+
+	level.Debug(logger).Log("msg", "setting up tsdb")
+	{
+		// TSDB.
+		cancel := make(chan struct{})
+		g.Add(
+			func() error {
+				level.Info(logger).Log("msg", "starting TSDB ...")
+				db, err := tsdb.Open(
+					dataDir,
+					log.With(logger, "component", "tsdb"),
+					reg,
+					tsdbCfg,
+				)
+				if err != nil {
+					return fmt.Errorf("opening storage failed: %s", err)
+				}
+				level.Info(logger).Log("msg", "tsdb started")
+
+				startTimeMargin := int64(2 * time.Duration(tsdbCfg.MinBlockDuration).Seconds() * 1000)
+				localStorage.Set(db, startTimeMargin)
+				close(dbOpen)
+				<-cancel
+				return nil
+			},
+			func(err error) {
+				if err := localStorage.Close(); err != nil {
+					level.Error(logger).Log("msg", "error stopping storage", "err", err)
+				}
+				close(cancel)
+			},
+		)
+	}
+
+	level.Debug(logger).Log("msg", "setting up metric http listen-group")
+	if err := metricHTTPListenGroup(g, logger, reg, httpMetricsBindAddr); err != nil {
+		return err
+	}
+
+	level.Debug(logger).Log("msg", "setting up grpc server")
+	{
+		var (
+			logger = log.With(logger, "component", "receiver")
+
+			s   *grpc.Server
+			l   net.Listener
+			err error
+		)
+		g.Add(func() error {
+			select {
+			case <-dbOpen:
+				break
+			}
+
+			l, err = net.Listen("tcp", grpcBindAddr)
+			if err != nil {
+				return errors.Wrap(err, "listen API address")
+			}
+
+			db := localStorage.Get()
+			tsdbStore := store.NewTSDBStore(log.With(logger, "component", "thanos-tsdb-store"), reg, db, component.RemoteWrite, nil)
+
+			opts, err := defaultGRPCServerOpts(logger, reg, tracer, cert, key, clientCA)
+			if err != nil {
+				return errors.Wrap(err, "setup gRPC server")
+			}
+			s = grpc.NewServer(opts...)
+			storepb.RegisterStoreServer(s, tsdbStore)
+
+			level.Info(logger).Log("msg", "listening for StoreAPI gRPC", "address", grpcBindAddr)
+			return errors.Wrap(s.Serve(l), "serve gRPC")
+		}, func(error) {
+			if s != nil {
+				s.Stop()
+			}
+			if l != nil {
+				runutil.CloseWithLogOnErr(logger, l, "store gRPC listener")
+			}
+		})
+	}
+
+	level.Debug(logger).Log("msg", "setting up receive http handler")
+	{
+		ctx, cancel := context.WithCancel(context.Background())
+		g.Add(
+			func() error {
+				if err := webHandler.Run(ctx); err != nil {
+					return fmt.Errorf("error starting web server: %s", err)
+				}
+				return nil
+			},
+			func(err error) {
+				cancel()
+			},
+		)
+	}
+	level.Info(logger).Log("msg", "starting receiver", "peer", peer.Name())
+
+	return nil
+}

pkg/component/component.go

@@ -71,17 +71,20 @@ func FromProto(storeType storepb.StoreType) StoreAPI {
 		return Sidecar
 	case storepb.StoreType_STORE:
 		return Store
+	case storepb.StoreType_REMOTE_WRITE:
+		return RemoteWrite
 	default:
 		return nil
 	}
 }
 
 var (
-	Bucket     = source{component: component{name: "bucket"}}
-	Compact    = source{component: component{name: "compact"}}
-	Downsample = source{component: component{name: "downsample"}}
-	Query      = sourceStoreAPI{component: component{name: "query"}}
-	Rule       = sourceStoreAPI{component: component{name: "rule"}}
-	Sidecar    = sourceStoreAPI{component: component{name: "sidecar"}}
-	Store      = sourceStoreAPI{component: component{name: "store"}}
+	Bucket      = source{component: component{name: "bucket"}}
+	Compact     = source{component: component{name: "compact"}}
+	Downsample  = source{component: component{name: "downsample"}}
+	Query       = sourceStoreAPI{component: component{name: "query"}}
+	Rule        = sourceStoreAPI{component: component{name: "rule"}}
+	Sidecar     = sourceStoreAPI{component: component{name: "sidecar"}}
+	Store       = sourceStoreAPI{component: component{name: "store"}}
+	RemoteWrite = sourceStoreAPI{component: component{name: "remote_write"}}
 )