Add setting config path from NGINX process

internal/collector/nginxplusreceiver/factory.go

@@ -19,6 +19,7 @@ import (
 	"github.com/nginx/agent/v3/internal/collector/nginxplusreceiver/internal/metadata"
 )
 
+// nolint: ireturn
 const defaultTimeout = 10 * time.Second
 
 // nolint: ireturn

internal/watcher/instance/nginx_process_parser.go

@@ -136,6 +136,8 @@ func (npp *NginxProcessParser) getInfo(ctx context.Context, proc *nginxprocess.P
 		}
 	}
 
+	confPath := getConfPathFromCommand(proc.Cmd)
+
 	var nginxInfo *Info
 
 	outputBuffer, err := npp.executer.RunCmd(ctx, exePath, "-V")
@@ -148,6 +150,10 @@ func (npp *NginxProcessParser) getInfo(ctx context.Context, proc *nginxprocess.P
 	nginxInfo.ExePath = exePath
 	nginxInfo.ProcessID = proc.PID
 
+	if nginxInfo.ConfPath = getNginxConfPath(ctx, nginxInfo); confPath != "" {
+		nginxInfo.ConfPath = confPath
+	}
+
 	loadableModules := getLoadableModules(nginxInfo)
 	nginxInfo.LoadableModules = loadableModules
 
@@ -268,7 +274,6 @@ func parseNginxVersionCommandOutput(ctx context.Context, output *bytes.Buffer) *
 	}
 
 	nginxInfo.Prefix = getNginxPrefix(ctx, nginxInfo)
-	nginxInfo.ConfPath = getNginxConfPath(ctx, nginxInfo)
 
 	return nginxInfo
 }
@@ -392,3 +397,17 @@ func convertToMap(processes []*nginxprocess.Process) map[int32]*nginxprocess.Pro
 
 	return processesByPID
 }
+
+func getConfPathFromCommand(command string) string {
+	commands := strings.Split(command, " ")
+
+	for i, command := range commands {
+		if command == "-c" {
+			if i < len(commands)-1 {
+				return commands[i+1]
+			}
+		}
+	}
+
+	return ""
+}

internal/watcher/instance/nginx_process_parser_test.go

@@ -616,3 +616,14 @@ func TestNginxProcessParser_GetExe(t *testing.T) {
 		})
 	}
 }
+
+func TestGetConfigPathFromCommand(t *testing.T) {
+	result := getConfPathFromCommand("nginx: master process nginx -c /tmp/nginx.conf")
+	assert.Equal(t, "/tmp/nginx.conf", result)
+
+	result = getConfPathFromCommand("nginx: master process nginx -c")
+	assert.Equal(t, "", result)
+
+	result = getConfPathFromCommand("")
+	assert.Equal(t, "", result)
+}