From 4a6ef534dfbbdf06b3415b26d2475f038fa2b8b7 Mon Sep 17 00:00:00 2001 From: Oskar Hahn Date: Mon, 15 Feb 2021 10:48:50 +0100 Subject: [PATCH] Add metrics (#110) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit * Add metrics * Hide metric url Co-authored-by: Emanuel Schütze --- cmd/autoupdate/main.go | 4 + cmd/autoupdate/ot.go | 26 +++ go.mod | 3 + go.sum | 416 +++++++++++++++++++++++++++++++++++++++++ internal/http/http.go | 82 +++++++- 5 files changed, 526 insertions(+), 5 deletions(-) create mode 100644 cmd/autoupdate/ot.go diff --git a/cmd/autoupdate/main.go b/cmd/autoupdate/main.go index 509dada6..cad38f9d 100644 --- a/cmd/autoupdate/main.go +++ b/cmd/autoupdate/main.go @@ -96,6 +96,10 @@ func run() error { mux := http.NewServeMux() autoupdatehttp.RegisterAll(mux, auth, a, n) + if err := initMeter(mux); err != nil { + log.Fatalf("Can not initialize meter: %v", err) + } + // Create http server. listenAddr := getEnv("AUTOUPDATE_HOST", "") + ":" + getEnv("AUTOUPDATE_PORT", "8002") srv := &http.Server{Addr: listenAddr, Handler: mux} diff --git a/cmd/autoupdate/ot.go b/cmd/autoupdate/ot.go new file mode 100644 index 00000000..ef329b77 --- /dev/null +++ b/cmd/autoupdate/ot.go @@ -0,0 +1,26 @@ +package main + +import ( + "fmt" + "net/http" + "time" + + "go.opentelemetry.io/contrib/instrumentation/runtime" + "go.opentelemetry.io/otel/exporters/metric/prometheus" +) + +func initMeter(mux *http.ServeMux) error { + exporter, err := prometheus.InstallNewPipeline(prometheus.Config{}) + if err != nil { + return fmt.Errorf("initialize prometheus pipeline: %w", err) + } + + if err := runtime.Start( + runtime.WithMinimumReadMemStatsInterval(time.Second), + ); err != nil { + return fmt.Errorf("initialize runtime metrics: %w", err) + } + + mux.Handle("/metrics", exporter) + return nil +} diff --git a/go.mod b/go.mod index b9a2e54a..9be4c7ed 100644 --- a/go.mod +++ b/go.mod @@ -5,4 +5,7 @@ go 1.15 require ( github.com/gomodule/redigo 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+honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= +sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= +sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU= diff --git a/internal/http/http.go b/internal/http/http.go index 3d9a7ffc..a283e619 100644 --- a/internal/http/http.go +++ b/internal/http/http.go @@ -17,8 +17,12 @@ import ( "github.com/OpenSlides/openslides3-autoupdate-service/internal/auth" "github.com/OpenSlides/openslides3-autoupdate-service/internal/autoupdate" "github.com/OpenSlides/openslides3-autoupdate-service/internal/notify" + "go.opentelemetry.io/otel" + "go.opentelemetry.io/otel/metric" ) +var meter = otel.GetMeterProvider().Meter("openslides.org") + // RegisterAll registers all routes. func RegisterAll(mux *http.ServeMux, auth Auther, a *autoupdate.Autoupdate, n *notify.Notify) { Health(mux) @@ -39,7 +43,19 @@ func Health(mux *http.ServeMux) { // Autoupdate registers the autoupdate route. func Autoupdate(mux *http.ServeMux, auto *autoupdate.Autoupdate, auther Auther) { + count := newConnectionCount("autoupdate") + handler := func(w http.ResponseWriter, r *http.Request) error { + uid := auth.FromContext(r.Context()) + + n := count.Add() + log.Printf("Got autoupdate connection. User %d. Connection count: %d", uid, n) + + defer func() { + n := count.Sub() + log.Printf("Lost autoupdate connection. User %d. Connection count: %d", uid, n) + }() + w.Header().Set("Content-Type", "application/octet-stream") rawChangeID := r.URL.Query().Get("change_id") @@ -57,7 +73,6 @@ func Autoupdate(mux *http.ServeMux, auto *autoupdate.Autoupdate, auther Auther) w.(http.Flusher).Flush() // Retrive uid from request. 0 for anonymous. - uid := auth.FromContext(r.Context()) log.Printf("connect user %d with change_id %d", uid, changeID) for { @@ -82,7 +97,7 @@ func Autoupdate(mux *http.ServeMux, auto *autoupdate.Autoupdate, auther Auther) // Projector registers the projector route. func Projector(mux *http.ServeMux, auto *autoupdate.Autoupdate, auth Auther) { - count := new(connectionCount) + count := newConnectionCount("projector") handler := func(w http.ResponseWriter, r *http.Request) error { n := count.Add() @@ -131,11 +146,22 @@ func Projector(mux *http.ServeMux, auto *autoupdate.Autoupdate, auth Auther) { // Notify registers the notify route. func Notify(mux *http.ServeMux, n *notify.Notify, auther Auther) { + count := newConnectionCount("notify") + handler := func(w http.ResponseWriter, r *http.Request) error { + uid := auth.FromContext(r.Context()) + + nu := count.Add() + log.Printf("Got autoupdate connection. User %d. Connection count: %d", uid, nu) + + defer func() { + nu := count.Sub() + log.Printf("Lost autoupdate connection. User %d. Connection count: %d", uid, nu) + }() + w.Header().Set("Content-Type", "application/octet-stream") - userID := auth.FromContext(r.Context()) - cid := n.GenerateChannelID(userID) + cid := n.GenerateChannelID(uid) tid := n.LastID() w.WriteHeader(http.StatusOK) @@ -153,7 +179,7 @@ func Notify(mux *http.ServeMux, n *notify.Notify, auther Auther) { var err error for { - tid, err = n.Receive(r.Context(), w, tid, userID, cid, encoder) + tid, err = n.Receive(r.Context(), w, tid, uid, cid, encoder) if err != nil { return noStatusCodeError{fmt.Errorf("rececing notify data: %w", err)} } @@ -165,7 +191,14 @@ func Notify(mux *http.ServeMux, n *notify.Notify, auther Auther) { // NotifySend registers the notify/send route. func NotifySend(mux *http.ServeMux, n *notify.Notify, auther Auther) { + counter, _ := meter.NewInt64Counter( + "openslides.notify-send-requests", + metric.WithDescription("request count to notify send"), + ) + handler := func(w http.ResponseWriter, r *http.Request) error { + counter.Add(r.Context(), 1) + userID := auth.FromContext(r.Context()) if userID == 0 { return authRequiredError{"You have to be logged in to use the notify system."} @@ -192,7 +225,13 @@ func NotifySend(mux *http.ServeMux, n *notify.Notify, auther Auther) { // NotifyApplause registers the notify/applause route. func NotifyApplause(mux *http.ServeMux, n *notify.Notify, auther Auther) { + counter, _ := meter.NewInt64Counter( + "openslides.notify-applause-requests", + metric.WithDescription("request count to applause send"), + ) + handler := func(w http.ResponseWriter, r *http.Request) error { + counter.Add(r.Context(), 1) userID := auth.FromContext(r.Context()) if userID == 0 { return authRequiredError{"You have to be logged in to send applause."} @@ -210,6 +249,11 @@ func NotifyApplause(mux *http.ServeMux, n *notify.Notify, auther Auther) { // internal error and logged to stdout. type errHandleFunc func(w http.ResponseWriter, r *http.Request) error +var errCount, _ = meter.NewInt64Counter( + "openslides.http-error-count", + metric.WithDescription("500er send to the client"), +) + func (f errHandleFunc) ServeHTTP(w http.ResponseWriter, r *http.Request) { if err := f(w, r); err != nil { var closing interface { @@ -256,6 +300,7 @@ func (f errHandleFunc) ServeHTTP(w http.ResponseWriter, r *http.Request) { } log.Printf("Internal Error: %v", err) fmt.Fprintln(w, `{"error": {"type": "InternalError", "msg": "Ups, something went wrong!"}}`) + errCount.Add(r.Context(), 1) } } @@ -352,6 +397,25 @@ func projectorIDs(raw string) ([]int, error) { type connectionCount struct { mu sync.Mutex v int + m metric.Int64Counter +} + +func newConnectionCount(name string) *connectionCount { + c := new(connectionCount) + + c.m, _ = meter.NewInt64Counter( + fmt.Sprintf("openslides.%s-connection-overall", name), + metric.WithDescription("overall connections to "+name), + ) + + meter.NewInt64UpDownSumObserver( + fmt.Sprintf("openslides.%s-connection-current", name), + func(_ context.Context, result metric.Int64ObserverResult) { + result.Observe(int64(c.Value())) + }, + metric.WithDescription("current open connections to "+name), + ) + return c } func (c *connectionCount) Add() int { @@ -359,6 +423,7 @@ func (c *connectionCount) Add() int { defer c.mu.Unlock() c.v++ + c.m.Add(context.Background(), 1) return c.v } @@ -369,3 +434,10 @@ func (c *connectionCount) Sub() int { c.v-- return c.v } + +func (c *connectionCount) Value() int { + c.mu.Lock() + defer c.mu.Unlock() + + return c.v +}