Initial vibeproxy implementation

Self-contained HTTP/HTTPS/TCP/UDP reverse proxy manager written in Go, with SQLite storage, a Bootstrap 5 admin UI (Go templates, no JS framework), and a REST API under /api/v1. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QTXFrNP1imCW7jtfL5SZrw
2026-08-17 10:28:59 -05:00
commit ba1f7c4c03
105 changed files with 9142 additions and 0 deletions
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+// Package metrics exposes Prometheus counters/gauges/histograms for HTTP,
+// TCP/UDP, backend, and TLS activity.
+package metrics
+
+import (
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+var (
+	HTTPRequestsTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Name: "vibeproxy_http_requests_total",
+		Help: "Total HTTP requests handled by the proxy.",
+	}, []string{"proxy_host", "method", "status"})
+
+	HTTPRequestDuration = promauto.NewHistogramVec(prometheus.HistogramOpts{
+		Name:    "vibeproxy_http_request_duration_seconds",
+		Help:    "HTTP request latency observed by the proxy, end to end.",
+		Buckets: prometheus.DefBuckets,
+	}, []string{"proxy_host"})
+
+	BackendRequestDuration = promauto.NewHistogramVec(prometheus.HistogramOpts{
+		Name:    "vibeproxy_backend_request_duration_seconds",
+		Help:    "Backend response latency as observed by the proxy.",
+		Buckets: prometheus.DefBuckets,
+	}, []string{"proxy_host", "backend"})
+
+	BytesTransferred = promauto.NewCounterVec(prometheus.CounterOpts{
+		Name: "vibeproxy_bytes_transferred_total",
+		Help: "Bytes transferred through the proxy.",
+	}, []string{"direction", "protocol"}) // direction=in|out, protocol=http|tcp|udp
+
+	ActiveConnections = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "vibeproxy_active_connections",
+		Help: "Currently active connections.",
+	}, []string{"protocol"}) // http|tcp|udp
+
+	BackendHealth = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "vibeproxy_backend_healthy",
+		Help: "1 if the backend is currently considered healthy, else 0.",
+	}, []string{"proxy_host", "backend"})
+
+	TCPConnectionsTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Name: "vibeproxy_tcp_connections_total",
+		Help: "Total TCP stream connections accepted.",
+	}, []string{"stream"})
+
+	UDPPacketsTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Name: "vibeproxy_udp_packets_total",
+		Help: "Total UDP packets proxied.",
+	}, []string{"stream", "direction"})
+
+	TLSHandshakesTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Name: "vibeproxy_tls_handshakes_total",
+		Help: "Total TLS handshakes, by result.",
+	}, []string{"result"}) // ok|error
+
+	CertificateExpirySeconds = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "vibeproxy_certificate_expiry_seconds",
+		Help: "Seconds until certificate expiry (negative if already expired).",
+	}, []string{"name"})
+)
+
+func Handler() http.Handler {
+	return promhttp.Handler()
+}