ci: fix retrieving docker network subnet/gateway (#4161)

Signed-off-by: zhangzujian <zhangzujian.7@gmail.com>

Makefile

@@ -157,10 +157,10 @@ endef
 
 define docker_network_info
 	$(eval VAR_PREFIX = $(shell echo $(1) | tr '[:lower:]' '[:upper:]'))
-	$(eval $(VAR_PREFIX)_IPV4_SUBNET = $(shell docker network inspect $(1) -f "{{(index .IPAM.Config 0).Subnet}}"))
-	$(eval $(VAR_PREFIX)_IPV6_SUBNET = $(shell docker network inspect $(1) -f "{{(index .IPAM.Config 1).Subnet}}"))
-	$(eval $(VAR_PREFIX)_IPV4_GATEWAY = $(shell docker network inspect $(1) -f "{{(index .IPAM.Config 0).Gateway}}"))
-	$(eval $(VAR_PREFIX)_IPV6_GATEWAY = $(shell docker network inspect $(1) -f "{{(index .IPAM.Config 1).Gateway}}"))
+	$(eval $(VAR_PREFIX)_IPV4_SUBNET = $(shell docker network inspect $(1) -f "{{range .IPAM.Config}}{{println .Subnet}}{{end}}" | grep -v :))
+	$(eval $(VAR_PREFIX)_IPV6_SUBNET = $(shell docker network inspect $(1) -f "{{range .IPAM.Config}}{{println .Subnet}}{{end}}" | grep :))
+	$(eval $(VAR_PREFIX)_IPV4_GATEWAY = $(shell docker network inspect $(1) -f "{{range .IPAM.Config}}{{println .Gateway}}{{end}}" | grep -v :))
+	$(eval $(VAR_PREFIX)_IPV6_GATEWAY = $(shell docker network inspect $(1) -f "{{range .IPAM.Config}}{{println .Gateway}}{{end}}" | grep :))
 	$(eval $(VAR_PREFIX)_IPV6_GATEWAY := $(shell docker exec kube-ovn-control-plane ip -6 route show default | awk '{print $$3}'))
 	$(eval $(VAR_PREFIX)_IPV4_EXCLUDE_IPS = $(shell docker network inspect $(1) -f '{{range .Containers}},{{index (split .IPv4Address "/") 0}}{{end}}' | sed 's/^,//'))
 	$(eval $(VAR_PREFIX)_IPV6_EXCLUDE_IPS = $(shell docker network inspect $(1) -f '{{range .Containers}},{{index (split .IPv6Address "/") 0}}{{end}}' | sed 's/^,//'))