rogee
aeddedf2a3
Restructure the monorepo into clear top-level directories: - backend/: Go module root (cmd, internal, pkg, configs, migrations, docs/swagger, scripts, tests, go.mod, Makefile, .air.toml) - deploy/: Docker (Dockerfile, docker-compose*), quickstart, fluentd - docs/: project documentation + reports/ (moved from repo root) - AGENTS.md: new AI coding-agent guide at repo root Update all references to the new layout: - Dockerfile: COPY backend/go.mod, COPY backend/ (context = repo root) - docker-compose files: context ../.., dockerfile deploy/docker/Dockerfile, env_file ../../.env, volume mounts ../../backend:/app - deploy/quickstart/compose.yaml: dockerfile deploy/docker/Dockerfile - CI: working-directory: backend for go commands, file deploy/docker/Dockerfile, coverage path backend/coverage.out, health_check backend/scripts/ - backend/Makefile: docker target uses -f ../deploy/docker/Dockerfile ../ - README: architecture tree, quickstart, config paths updated Move root stray scripts (rename_models.*, run_m11_tests.sh, verify_build.sh, gorm_bool_main.go) to backend/scripts/legacy/. All moves via git mv to preserve history. Build, vet, SQLite tests, and docker compose config verified.
83 lines
2.3 KiB
Go
83 lines
2.3 KiB
Go
package handler
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import (
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"fmt"
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"net/http"
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"runtime"
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"time"
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"github.com/gin-gonic/gin"
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)
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// MetricsHandler exposes Prometheus-compatible metrics in text exposition format.
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// Reference: Chatwoot uses Prometheus exporter for Sidekiq, Rails metrics
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// This provides Go runtime + application metrics on a dedicated port.
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// PrometheusHandler returns metrics in Prometheus text format.
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func PrometheusHandler(startTime time.Time) gin.HandlerFunc {
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return func(c *gin.Context) {
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var m runtime.MemStats
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runtime.ReadMemStats(&m)
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uptime := time.Since(startTime).Seconds()
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metrics := []string{
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// Go runtime metrics
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formatGauge("gochat_go_goroutines", uint64(runtime.NumGoroutine())),
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formatGauge("gochat_go_memory_alloc_bytes", m.Alloc),
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formatGauge("gochat_go_memory_sys_bytes", m.Sys),
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formatGauge("gochat_go_memory_total_alloc_bytes", m.TotalAlloc),
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formatGauge("gochat_go_gc_pause_total_ns", m.PauseTotalNs),
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formatCounter("gochat_go_gc_count", uint64(m.NumGC)),
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// Application metrics
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formatGauge("gochat_uptime_seconds", uint64(uptime)),
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formatGauge("gochat_threads_count", uint64(runtime.NumCPU())),
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}
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// HELP and TYPE annotations
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help := []string{
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"# HELP gochat_go_goroutines Number of goroutines currently running",
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"# TYPE gochat_go_goroutines gauge",
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"# HELP gochat_go_memory_alloc_bytes Bytes of allocated heap objects",
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"# TYPE gochat_go_memory_alloc_bytes gauge",
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"# HELP gochat_go_memory_sys_bytes Bytes obtained from system",
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"# TYPE gochat_go_memory_sys_bytes gauge",
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"# HELP gochat_uptime_seconds Application uptime in seconds",
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"# TYPE gochat_uptime_seconds gauge",
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}
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output := ""
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for _, h := range help {
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output += h + "\n"
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}
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for _, m := range metrics {
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output += m + "\n"
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}
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c.Header("Content-Type", "text/plain; version=0.0.4; charset=utf-8")
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c.String(http.StatusOK, output)
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}
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}
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func formatGauge(name string, value uint64) string {
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return name + " " + formatValue(value)
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}
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func formatCounter(name string, value uint64) string {
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return name + " " + formatValue(value)
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}
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func formatValue(v uint64) string {
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// Simple uint64 formatting without strconv dependency
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if v == 0 {
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return "0"
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}
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result := ""
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for v > 0 {
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digit := v % 10
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result = fmt.Sprintf("%d%s", digit, result)
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v /= 10
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}
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return result
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}
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