Initial commit — cynfo RMM (clean history, no secrets)

agent/collector/caddy.go

@@ -1,9 +1,13 @@
 package collector
 
 import (
+	"encoding/json"
+	"io"
+	"net/http"
 	"os"
 	"os/exec"
 	"strings"
+	"time"
 )
 
 type CaddySite struct {
@@ -12,12 +16,21 @@ type CaddySite struct {
 	TLS      bool   `json:"tls"`
 }
 
+type CaddyUpstream struct {
+	Address     string `json:"address"`
+	NumRequests int    `json:"num_requests"`
+	Fails       int    `json:"fails"`
+	Healthy     bool   `json:"healthy"`
+}
+
 type CaddyData struct {
-	Version string      `json:"version"`
-	Sites   []CaddySite `json:"sites"`
+	Version   string          `json:"version"`
+	Sites     []CaddySite     `json:"sites"`
+	Upstreams []CaddyUpstream `json:"upstreams,omitempty"`
 }
 
 const caddyFile = "/usr/local/etc/caddy/Caddyfile"
+const caddyAdminAPI = "http://127.0.0.1:2019"
 
 func CollectCaddy() *CaddyData {
 	if _, err := os.Stat(caddyFile); err != nil {
@@ -34,7 +47,7 @@ func CollectCaddy() *CaddyData {
 		}
 	}
 
-	// Parse Caddyfile
+	// Parse Caddyfile fuer Sites
 	content, err := os.ReadFile(caddyFile)
 	if err != nil {
 		return data
@@ -51,7 +64,6 @@ func CollectCaddy() *CaddyData {
 			continue
 		}
 
-		// Check for domain block start: "domain.com {" or "http://domain.com {"
 		if depth == 0 && strings.Contains(trimmed, "{") {
 			parts := strings.Fields(trimmed)
 			if len(parts) >= 2 && parts[len(parts)-1] == "{" {
@@ -63,7 +75,6 @@ func CollectCaddy() *CaddyData {
 		}
 
 		if depth > 0 {
-			// Track nested braces
 			depth += strings.Count(trimmed, "{") - strings.Count(trimmed, "}")
 
 			if strings.HasPrefix(trimmed, "reverse_proxy") {
@@ -85,5 +96,43 @@ func CollectCaddy() *CaddyData {
 		}
 	}
 
+	// Admin-API: Upstream-Statistiken
+	data.Upstreams = collectCaddyUpstreams()
+
 	return data
 }
+
+func collectCaddyUpstreams() []CaddyUpstream {
+	client := &http.Client{Timeout: 3 * time.Second}
+	resp, err := client.Get(caddyAdminAPI + "/api/reverse_proxy/upstreams")
+	if err != nil {
+		return nil
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(io.LimitReader(resp.Body, 64*1024))
+	if err != nil {
+		return nil
+	}
+
+	// Admin-API liefert: [{"address":"host:port","num_requests":N,"fails":N}]
+	var raw []struct {
+		Address     string `json:"address"`
+		NumRequests int    `json:"num_requests"`
+		Fails       int    `json:"fails"`
+	}
+	if err := json.Unmarshal(body, &raw); err != nil {
+		return nil
+	}
+
+	upstreams := make([]CaddyUpstream, 0, len(raw))
+	for _, u := range raw {
+		upstreams = append(upstreams, CaddyUpstream{
+			Address:     u.Address,
+			NumRequests: u.NumRequests,
+			Fails:       u.Fails,
+			Healthy:     u.Fails == 0,
+		})
+	}
+	return upstreams
+}