Hi:
We are looking for a simple and clear way to configure a DNS resolver. This
is our final goal.
You know, we can not modify the title of the thread.
I think we have found the right method, please confirm that this is the
method we need.
```yaml
#
apisix:
dns_resolver: # use 114.114.114.114, 223.5.5.5 as DNS resolver
- 114.114.114.114
- 223.5.5.5
```
```yaml
#
apisix:
# dns_resolver: # use /etc/resolver.conf as default DNS resolver
# - 114.114.114.114
# - 223.5.5.5
```
On Thu, Mar 26, 2020 at 7:38 AM Ming Wen <[email protected]> wrote:
> Hi, yuansheng,
> please discuss around the title of thread.
>
> Thanks,
> Ming Wen, Apache APISIX & Apache SkyWalking
> Twitter: _WenMing
>
>
> YuanSheng Wang <[email protected]> 于2020年3月26日周四 上午7:07写道：
>
> > > use local dns when dns_resolver is empty.
> >
> > `dns_resolver is empty` means the dns_resolver should be an array and the
> > size is zero,
> > this is very different from having none.
> >
> > For the empty array case in yaml, it should be like this, I got it from
> > google search[1]:
> >
> > ```yaml
> > #
> > apisix:
> > dns_resolver: [] # use local resolver
> > ```
> >
> > [1]
> >
> >
> https://stackoverflow.com/questions/5110313/how-do-i-create-an-empty-array-in-yaml
> >
> >
> > On Wed, Mar 25, 2020 at 11:06 PM Ming Wen <[email protected]> wrote:
> >
> > > this is exactly my design in this PR, use local dns when dns_resolver
> is
> > > empty.
> > >
> > > YuanSheng Wang <[email protected]>于2020年3月25日 周三下午10:59写道：
> > >
> > > > How about this way?
> > > >
> > > > ```yaml
> > > > #
> > > > apisix:
> > > > dns_resolver: # use 114.114.114.114, 223.5.5.5 as DNS
> > resolver
> > > > - 114.114.114.114
> > > > - 223.5.5.5
> > > > ```
> > > >
> > > > ```yaml
> > > > #
> > > > apisix:
> > > > # dns_resolver: # use /etc/resolver.conf as default DNS
> > > resolver
> > > > # - 114.114.114.114
> > > > # - 223.5.5.5
> > > > ```
> > > >
> > > > It is simple and clear.
> > > >
> > > >
> > > > On Wed, Mar 25, 2020 at 10:48 PM Ming Wen <[email protected]>
> wrote:
> > > >
> > > > > Two switches means 4 combinations, which will bring more
> complexity,
> > > more
> > > > > test cases,
> > > > > and it will be difficult for users to understand. such as:
> > > > > 1. What should I do if `dns_resolver` is empty and
> `enable_local_dns`
> > > is
> > > > > false?
> > > > > 2. What should I do if `dns_resolver` is not empty and
> > > `enable_local_dns`
> > > > > is true?
> > > > >
> > > > > To be honest, I don't know how to deal with the above two
> situations.
> > > > >
> > > > > A design that doesn't need to be explained to the user is a good
> > > design.
> > > > >
> > > > > Thanks,
> > > > > Ming Wen, Apache APISIX & Apache SkyWalking
> > > > > Twitter: _WenMing
> > > > >
> > > > >
> > > > > YuanSheng Wang <[email protected]> 于2020年3月25日周三 下午9:42写道：
> > > > >
> > > > > > @Ming
> > > > > >
> > > > > >
> > > > > > "When the dns_resolver in config.yaml is not set any IP, then it
> > will
> > > > > read
> > > > > > the local resolv.conf. This is equivalent to a hidden switch."
> [1]
> > > > > >
> > > > > > I don't like this hidden switch.
> > > > > >
> > > > > > We should allow users to enable or disable local
> `/etc/resolv.conf`
> > > > > > independently.
> > > > > >
> > > > > > It's easier to understand.
> > > > > >
> > > > > > [1]
> > > > > >
> > > > >
> > > >
> > >
> >
> https://github.com/apache/incubator-apisix/pull/1217#issuecomment-598500231
> > > > > >
> > > > > >
> > > > > > On Wed, Mar 25, 2020 at 9:17 PM YuanSheng Wang <
> > [email protected]>
> > > > > > wrote:
> > > > > >
> > > > > > > Hi
> > > > > > >
> > > > > > > Here is the github PR[1]
> > > > > > >
> > > > > > > what is your opinion about this?
> > > > > > >
> > > > > > >
> > > > > > > [1]
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
> https://github.com/apache/incubator-apisix/pull/1217#discussion_r397817423
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > --
> > > > > > > *MembPhis*
> > > > > > > My github: https://github.com/membphis
> > > > > > > Apache APISIX: https://github.com/apache/incubator-apisix
> > > > > > >
> > > > > >
> > > > > >
> > > > > > --
> > > > > > *MembPhis*
> > > > > > My github: https://github.com/membphis
> > > > > > Apache APISIX: https://github.com/apache/incubator-apisix
> > > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > *MembPhis*
> > > > My github: https://github.com/membphis
> > > > Apache APISIX: https://github.com/apache/incubator-apisix
> > > >
> > > --
> > > Thanks,
> > > Ming Wen, Apache APISIX & Apache SkyWalking
> > > Twitter: _WenMing
> > >
> >
> >
> > --
> > *MembPhis*
> > My github: https://github.com/membphis
> > Apache APISIX: https://github.com/apache/incubator-apisix
> >
>
--
*MembPhis*
My github: https://github.com/membphis
Apache APISIX: https://github.com/apache/incubator-apisix
