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feat: expose template insights as Prometheus metrics #10255

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24e4ff3
WIP
mtojek Oct 13, 2023
a6c9c1a
Use db
mtojek Oct 13, 2023
86f45a0
debug
mtojek Oct 13, 2023
bfcd8f4
Merge branch 'main' into 9983-insights-metrics
mtojek Oct 17, 2023
a3c29a7
DB calls
mtojek Oct 17, 2023
24ae332
WIP
mtojek Oct 17, 2023
0cb1206
WIP dbfake
mtojek Oct 18, 2023
3c31168
Merge branch 'main' into 9983-insights-metrics
mtojek Oct 18, 2023
a764cef
Collect metrics data
mtojek Oct 18, 2023
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WIP
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@mtojek
mtojek committed Oct 13, 2023
commit 24e4ff388fd182124b63f25edf1cb68c04ed2287
13 changes: 13 additions & 0 deletions cli/server.go
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Original file line number Diff line number Diff line change
Expand Up @@ -78,6 +78,7 @@ import (
"github.com/coder/coder/v2/coderd/httpmw"
"github.com/coder/coder/v2/coderd/oauthpki"
"github.com/coder/coder/v2/coderd/prometheusmetrics"
"github.com/coder/coder/v2/coderd/prometheusmetrics/insights"
"github.com/coder/coder/v2/coderd/schedule"
"github.com/coder/coder/v2/coderd/telemetry"
"github.com/coder/coder/v2/coderd/tracing"
Expand Down Expand Up @@ -198,6 +199,18 @@ func enablePrometheus(
}
afterCtx(ctx, closeWorkspacesFunc)

insightsMetricsCollector := insights.NewMetricsCollector(options.Database, 0)
err = options.PrometheusRegistry.Register(insightsMetricsCollector)
if err != nil {
return nil, xerrors.Errorf("unable to register insights metrics collector: %w", err)
}

closeInsightsMetricsCollector, err := insightsMetricsCollector.Run(ctx)
if err != nil {
return nil, xerrors.Errorf("unable to run insights metrics collector: %w", err)
}
afterCtx(ctx, closeInsightsMetricsCollector)

if vals.Prometheus.CollectAgentStats {
closeAgentStatsFunc, err := prometheusmetrics.AgentStats(ctx, logger, options.PrometheusRegistry, options.Database, time.Now(), 0)
if err != nil {
Expand Down
72 changes: 72 additions & 0 deletions coderd/prometheusmetrics/insights/metricscollector.go
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Original file line number Diff line number Diff line change
@@ -0,0 +1,72 @@
package insights

import (
"context"
"time"

"github.com/prometheus/client_golang/prometheus"

"github.com/coder/coder/v2/coderd/database"
)

var (
activeUsersDesc = prometheus.NewDesc("coderd_insights_active_users", "The number of active users of the template.", []string{"template_name"}, nil)
applicationsUsageSecondsDesc = prometheus.NewDesc("coderd_insights_applications_usage_seconds", "The application usage per template.", []string{"application_name", "template_name"}, nil)
parametersDesc = prometheus.NewDesc("coderd_insights_parameters", "The parameter usage per template.", []string{"template_name", "name", "value"}, nil)
)

type MetricsCollector struct {
database database.Store
duration time.Duration
}

var _ prometheus.Collector = new(MetricsCollector)

func NewMetricsCollector(db database.Store, duration time.Duration) *MetricsCollector {
if duration == 0 {
duration = 5 * time.Minute
}

return &MetricsCollector{
database: db,
duration: duration,
}
}

func (mc *MetricsCollector) Run(ctx context.Context) (func(), error) {
ctx, closeFunc := context.WithCancel(ctx)
done := make(chan struct{})

// Use time.Nanosecond to force an initial tick. It will be reset to the
// correct duration after executing once.
ticker := time.NewTicker(time.Nanosecond)
doTick := func() {
defer ticker.Reset(mc.duration)
}

go func() {
defer close(done)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
doTick()
}
}
}()
return func() {
closeFunc()
<-done
}, nil
}

func (*MetricsCollector) Describe(descCh chan<- *prometheus.Desc) {
descCh <- activeUsersDesc
descCh <- applicationsUsageSecondsDesc
descCh <- parametersDesc
}

func (mc *MetricsCollector) Collect(metricsCh chan<- prometheus.Metric) {
}