fix: nil pointer dereference when os.OpenFile fails (#12808)

Author: mei2jun1

agent/app/service/website_ssl.go

@@ -199,8 +199,12 @@ func (w WebsiteSSLService) Create(create request.WebsiteSSLCreate) (request.Webs
 		return res, err
 	}
 	create.ID = websiteSSL.ID
-	logFile, _ := os.OpenFile(path.Join(global.Dir.SSLLogDir, fmt.Sprintf("%s-ssl-%d.log", websiteSSL.PrimaryDomain, websiteSSL.ID)), os.O_CREATE|os.O_WRONLY|os.O_TRUNC, constant.FilePerm)
-	logFile.Close()
+	logFile, err := os.OpenFile(path.Join(global.Dir.SSLLogDir, fmt.Sprintf("%s-ssl-%d.log", websiteSSL.PrimaryDomain, websiteSSL.ID)), os.O_CREATE|os.O_WRONLY|os.O_TRUNC, constant.FilePerm)
+	if err != nil {
+		global.LOG.Errorf("open ssl log file failed, domain: %s, err: %v", websiteSSL.PrimaryDomain, err)
+	} else {
+		logFile.Close()
+	}
 	go func() {
 		if create.Provider != constant.DnsManual {
 			if err = w.ObtainSSL(request.WebsiteSSLApply{