ipam: fix ippool with single dual-stack address (#3054)

Author: zhangzujian

pkg/controller/pod.go

@@ -1448,6 +1448,9 @@ func (c *Controller) acquireAddress(pod *v1.Pod, podNet *kubeovnNet) (string, st
 			ipPool = strings.Split(pod.Annotations[fmt.Sprintf(util.IpPoolAnnotationTemplate, podNet.ProviderName)], ";")
 		} else {
 			ipPool = strings.Split(pod.Annotations[fmt.Sprintf(util.IpPoolAnnotationTemplate, podNet.ProviderName)], ",")
+			if len(ipPool) == 2 && util.CheckProtocol(ipPool[0]) != util.CheckProtocol(ipPool[1]) {
+				ipPool = []string{pod.Annotations[fmt.Sprintf(util.IpPoolAnnotationTemplate, podNet.ProviderName)]}
+			}
 		}
 		for i, ip := range ipPool {
 			ipPool[i] = strings.TrimSpace(ip)