feat: added status check and control functions for the Nginx stub_status module and optimized the performance data acquisition logic

internal/nginx/config_info.go

@@ -0,0 +1,48 @@
+package nginx
+
+import (
+	"os/exec"
+	"regexp"
+	"runtime"
+	"strconv"
+
+	"github.com/pkg/errors"
+)
+
+type NginxConfigInfo struct {
+	WorkerProcesses   int `json:"worker_processes"`
+	WorkerConnections int `json:"worker_connections"`
+}
+
+// GetNginxWorkerConfigInfo Get Nginx config info of worker_processes and worker_connections
+func GetNginxWorkerConfigInfo() (*NginxConfigInfo, error) {
+	result := &NginxConfigInfo{
+		WorkerProcesses:   1,
+		WorkerConnections: 1024,
+	}
+
+	// Get worker_processes config
+	cmd := exec.Command("nginx", "-T")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return result, errors.Wrap(err, "failed to get nginx config")
+	}
+
+	// Parse worker_processes
+	wpRe := regexp.MustCompile(`worker_processes\s+(\d+|auto);`)
+	if matches := wpRe.FindStringSubmatch(string(output)); len(matches) > 1 {
+		if matches[1] == "auto" {
+			result.WorkerProcesses = runtime.NumCPU()
+		} else {
+			result.WorkerProcesses, _ = strconv.Atoi(matches[1])
+		}
+	}
+
+	// Parse worker_connections
+	wcRe := regexp.MustCompile(`worker_connections\s+(\d+);`)
+	if matches := wcRe.FindStringSubmatch(string(output)); len(matches) > 1 {
+		result.WorkerConnections, _ = strconv.Atoi(matches[1])
+	}
+
+	return result, nil
+}