mautrix-whatsapp/metrics.go

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// mautrix-whatsapp - A Matrix-WhatsApp puppeting bridge.
// Copyright (C) 2020 Tulir Asokan
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package main
import (
"context"
"net/http"
"runtime/debug"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/promhttp"
log "maunium.net/go/maulogger/v2"
"maunium.net/go/mautrix/event"
"maunium.net/go/mautrix/id"
"maunium.net/go/mautrix-whatsapp/database"
"maunium.net/go/mautrix-whatsapp/types"
)
type MetricsHandler struct {
db *database.Database
server *http.Server
log log.Logger
running bool
ctx context.Context
stopRecorder func()
messageHandling *prometheus.HistogramVec
countCollection prometheus.Histogram
disconnections *prometheus.CounterVec
puppetCount prometheus.Gauge
userCount prometheus.Gauge
messageCount prometheus.Gauge
portalCount *prometheus.GaugeVec
encryptedGroupCount prometheus.Gauge
encryptedPrivateCount prometheus.Gauge
unencryptedGroupCount prometheus.Gauge
unencryptedPrivateCount prometheus.Gauge
connected prometheus.Gauge
connectedState map[types.WhatsAppID]bool
loggedIn prometheus.Gauge
loggedInState map[types.WhatsAppID]bool
syncLocked prometheus.Gauge
syncLockedState map[types.WhatsAppID]bool
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bufferLength *prometheus.GaugeVec
}
func NewMetricsHandler(address string, log log.Logger, db *database.Database) *MetricsHandler {
portalCount := promauto.NewGaugeVec(prometheus.GaugeOpts{
Name: "whatsapp_portals_total",
Help: "Number of portal rooms on Matrix",
}, []string{"type", "encrypted"})
return &MetricsHandler{
db: db,
server: &http.Server{Addr: address, Handler: promhttp.Handler()},
log: log,
running: false,
messageHandling: promauto.NewHistogramVec(prometheus.HistogramOpts{
Name: "matrix_event",
Help: "Time spent processing Matrix events",
}, []string{"event_type"}),
countCollection: promauto.NewHistogram(prometheus.HistogramOpts{
Name: "whatsapp_count_collection",
Help: "Time spent collecting the whatsapp_*_total metrics",
}),
disconnections: promauto.NewCounterVec(prometheus.CounterOpts{
Name: "whatsapp_disconnections",
Help: "Number of times a Matrix user has been disconnected from WhatsApp",
}, []string{"user_id"}),
puppetCount: promauto.NewGauge(prometheus.GaugeOpts{
Name: "whatsapp_puppets_total",
Help: "Number of WhatsApp users bridged into Matrix",
}),
userCount: promauto.NewGauge(prometheus.GaugeOpts{
Name: "whatsapp_users_total",
Help: "Number of Matrix users using the bridge",
}),
messageCount: promauto.NewGauge(prometheus.GaugeOpts{
Name: "whatsapp_messages_total",
Help: "Number of messages bridged",
}),
portalCount: portalCount,
encryptedGroupCount: portalCount.With(prometheus.Labels{"type": "group", "encrypted": "true"}),
encryptedPrivateCount: portalCount.With(prometheus.Labels{"type": "private", "encrypted": "true"}),
unencryptedGroupCount: portalCount.With(prometheus.Labels{"type": "group", "encrypted": "false"}),
unencryptedPrivateCount: portalCount.With(prometheus.Labels{"type": "private", "encrypted": "false"}),
loggedIn: promauto.NewGauge(prometheus.GaugeOpts{
Name: "bridge_logged_in",
Help: "Users logged into the bridge",
}),
loggedInState: make(map[types.WhatsAppID]bool),
connected: promauto.NewGauge(prometheus.GaugeOpts{
Name: "bridge_connected",
Help: "Bridge users connected to WhatsApp",
}),
connectedState: make(map[types.WhatsAppID]bool),
syncLocked: promauto.NewGauge(prometheus.GaugeOpts{
Name: "bridge_sync_locked",
Help: "Bridge users locked in post-login sync",
}),
syncLockedState: make(map[types.WhatsAppID]bool),
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bufferLength: promauto.NewGaugeVec(prometheus.GaugeOpts{
Name: "bridge_buffer_size",
Help: "Number of messages in buffer",
}, []string{"user_id"}),
}
}
func noop() {}
func (mh *MetricsHandler) TrackEvent(eventType event.Type) func() {
if !mh.running {
return noop
}
start := time.Now()
return func() {
duration := time.Now().Sub(start)
mh.messageHandling.
With(prometheus.Labels{"event_type": eventType.Type}).
Observe(duration.Seconds())
}
}
func (mh *MetricsHandler) TrackDisconnection(userID id.UserID) {
if !mh.running {
return
}
mh.disconnections.With(prometheus.Labels{"user_id": string(userID)}).Inc()
}
func (mh *MetricsHandler) TrackLoginState(jid types.WhatsAppID, loggedIn bool) {
if !mh.running {
return
}
currentVal, ok := mh.loggedInState[jid]
if !ok || currentVal != loggedIn {
mh.loggedInState[jid] = loggedIn
if loggedIn {
mh.loggedIn.Inc()
} else {
mh.loggedIn.Dec()
}
}
}
func (mh *MetricsHandler) TrackConnectionState(jid types.WhatsAppID, connected bool) {
if !mh.running {
return
}
currentVal, ok := mh.connectedState[jid]
if !ok || currentVal != connected {
mh.connectedState[jid] = connected
if connected {
mh.connected.Inc()
} else {
mh.connected.Dec()
}
}
}
func (mh *MetricsHandler) TrackSyncLock(jid types.WhatsAppID, locked bool) {
if !mh.running {
return
}
currentVal, ok := mh.syncLockedState[jid]
if !ok || currentVal != locked {
mh.syncLockedState[jid] = locked
if locked {
mh.syncLocked.Inc()
} else {
mh.syncLocked.Dec()
}
}
}
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func (mh *MetricsHandler) TrackBufferLength(id id.UserID, length int) {
if !mh.running {
return
}
mh.bufferLength.With(prometheus.Labels{"user_id": string(id)}).Set(float64(length))
}
func (mh *MetricsHandler) updateStats() {
start := time.Now()
var puppetCount int
err := mh.db.QueryRowContext(mh.ctx, "SELECT COUNT(*) FROM puppet").Scan(&puppetCount)
if err != nil {
mh.log.Warnln("Failed to scan number of puppets:", err)
} else {
mh.puppetCount.Set(float64(puppetCount))
}
var userCount int
err = mh.db.QueryRowContext(mh.ctx, `SELECT COUNT(*) FROM "user"`).Scan(&userCount)
if err != nil {
mh.log.Warnln("Failed to scan number of users:", err)
} else {
mh.userCount.Set(float64(userCount))
}
var messageCount int
err = mh.db.QueryRowContext(mh.ctx, "SELECT COUNT(*) FROM message").Scan(&messageCount)
if err != nil {
mh.log.Warnln("Failed to scan number of messages:", err)
} else {
mh.messageCount.Set(float64(messageCount))
}
var encryptedGroupCount, encryptedPrivateCount, unencryptedGroupCount, unencryptedPrivateCount int
err = mh.db.QueryRowContext(mh.ctx, `
SELECT
COUNT(CASE WHEN jid LIKE '%@g.us' AND encrypted THEN 1 END) AS encrypted_group_portals,
COUNT(CASE WHEN jid LIKE '%@s.whatsapp.net' AND encrypted THEN 1 END) AS encrypted_private_portals,
COUNT(CASE WHEN jid LIKE '%@g.us' AND NOT encrypted THEN 1 END) AS unencrypted_group_portals,
COUNT(CASE WHEN jid LIKE '%@s.whatsapp.net' AND NOT encrypted THEN 1 END) AS unencrypted_private_portals
FROM portal WHERE mxid<>''
`).Scan(&encryptedGroupCount, &encryptedPrivateCount, &unencryptedGroupCount, &unencryptedPrivateCount)
if err != nil {
mh.log.Warnln("Failed to scan number of portals:", err)
} else {
mh.encryptedGroupCount.Set(float64(encryptedGroupCount))
mh.encryptedPrivateCount.Set(float64(encryptedPrivateCount))
mh.unencryptedGroupCount.Set(float64(unencryptedGroupCount))
mh.unencryptedPrivateCount.Set(float64(encryptedPrivateCount))
}
mh.countCollection.Observe(time.Now().Sub(start).Seconds())
}
func (mh *MetricsHandler) startUpdatingStats() {
defer func() {
err := recover()
if err != nil {
mh.log.Fatalfln("Panic in metric updater: %v\n%s", err, string(debug.Stack()))
}
}()
ticker := time.Tick(10 * time.Second)
for {
mh.updateStats()
select {
case <-mh.ctx.Done():
return
case <-ticker:
}
}
}
func (mh *MetricsHandler) Start() {
mh.running = true
mh.ctx, mh.stopRecorder = context.WithCancel(context.Background())
go mh.startUpdatingStats()
err := mh.server.ListenAndServe()
mh.running = false
if err != nil && err != http.ErrServerClosed {
mh.log.Fatalln("Error in metrics listener:", err)
}
}
func (mh *MetricsHandler) Stop() {
if !mh.running {
return
}
mh.stopRecorder()
err := mh.server.Close()
if err != nil {
mh.log.Errorln("Error closing metrics listener:", err)
}
}