cluster: mark kylin v10 as supported OS (#2079)

pkg/cluster/operation/check.go

@@ -168,13 +168,10 @@ func checkOSInfo(opt *CheckOptions, osInfo *sysinfo.OS) *CheckResult {
 	// check OS vendor
 	switch osInfo.Vendor {
 	case "kylin":
-		msg := "kylin support is not fully tested, be careful"
-		result.Err = fmt.Errorf("%s (%s)", result.Msg, msg)
-		result.Warn = true
 		// VERSION_ID="V10"
 		if ver, _ := strconv.ParseFloat(strings.Trim(osInfo.Version, "V"), 64); ver < 10 {
-			result.Err = fmt.Errorf("%s %s not supported, use version V10 or higher(%s)",
-				osInfo.Name, osInfo.Release, msg)
+			result.Err = fmt.Errorf("%s %s not supported, use version V10 or higher",
+				osInfo.Name, osInfo.Release)
 			return result
 		}
 	case "amzn":
@@ -187,8 +184,6 @@ func checkOSInfo(opt *CheckOptions, osInfo *sysinfo.OS) *CheckResult {
 		}
 	case "centos", "redhat", "rhel", "ol":
 		// check version
-		// CentOS 8 is known to be not working, and we don't have plan to support it
-		// as of now, we may add support for RHEL 8 based systems in the future.
 		if ver, _ := strconv.ParseFloat(osInfo.Version, 64); ver < 7 {
 			result.Err = fmt.Errorf("%s %s not supported, use version 8 please",
 				osInfo.Name, osInfo.Release)