Agree, warn log is needed.
> 在 2019年4月4日，下午5:40，YunKun Huang <[email protected]> 写道：
>
> I prefer option 2. but I think we need a warn message if no public ip exist
> to let user know this behaviour?
>
> On 2019/04/04 09:21:10, 徐靖峰 <[email protected]> wrote:
>> Hi,
>> I notice that recently there are some issue about NetUtils.getLocalHost,
>> someone complains about that logic changes bring by
>> issue: https://github.com/apache/incubator-dubbo/issues/538
>> <https://github.com/apache/incubator-dubbo/issues/538>
>> pr: https://github.com/apache/incubator-dubbo/pull/3520
>> <https://github.com/apache/incubator-dubbo/pull/3520>
>> The change places in 2.7.1 is NetUtils.getLocalHost add a new check method:
>>> static boolean isValidPublicAddress(InetAddress address) {
>>> return !address.isSiteLocalAddress() && !address.isLoopbackAddress();
>>> }
>> This will exclude local site address like:
>> 10/8 prefix
>> 172.16/12 prefix
>> 192.168/16 prefix
>> so a internal ip 172.161.3.4 will successfully register into registry
>> before, but will register localhost(mostly 127.0.0.1) into registry if no
>> public ip exists.
>>
>> Action:
>> 1. Add a param switch let user choose to prefer to register local site
>> address or public address.
>> 2. The default priority to find useful address in multi network cards can
>> be : public > internal > localhost.
>
