Use of miekg/dns

[cbro...@gmail.com]

I was looking through the code for the dns prober, and I noticed it uses https://github.com/miekg/dns instead of Go's built-in resolver. Based on my cursory review, it doesn't appear that the prober logic depends on any functionality that the built-in resolver doesn't already provide, so I'm curious why the 3rd party version is being utilized? This is just for my own understanding.

Thanks,

-Chris

[Manu Garg]

Hi Chris,

On Mon, Nov 27, 2017 at 7:07 PM, <cbro...@gmail.com> wrote:

I was looking through the code for the dns prober, and I noticed it uses https://github.com/miekg/dns instead of Go's built-in resolver. Based on my cursory review, it doesn't appear that the prober logic depends on any functionality that the built-in resolver doesn't already provide, so I'm curious why the 3rd party version is being utilized? This is just for my own understanding.

Go's standard resolver functions[1] don't allow you to specify a particular DNS server, which is a required functionality for the "dns" probe as it sends DNS requests to the configured DNS server target. https://github.com/miekg/dns seems to be most popular way to work with DNS.

[1] - https://golang.org/pkg/net/#LookupHost

Thanks,

-Chris

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Manu Garg
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[Chris Broglie]

Oh alright, that makes sense. I misunderstood the job of the dns prober; I thought it was to test the resolution of a given domain, as opposed to test a given dns server. Thanks for the explanation.

On Tuesday, November 28, 2017 at 2:09:28 AM UTC-8, Manu Garg wrote:

Hi Chris,

On Mon, Nov 27, 2017 at 7:07 PM, <cbro...@gmail.com> wrote:

I was looking through the code for the dns prober, and I noticed it uses https://github.com/miekg/dns instead of Go's built-in resolver. Based on my cursory review, it doesn't appear that the prober logic depends on any functionality that the built-in resolver doesn't already provide, so I'm curious why the 3rd party version is being utilized? This is just for my own understanding.

Go's standard resolver functions[1] don't allow you to specify a particular DNS server, which is a required functionality for the "dns" probe as it sends DNS requests to the configured DNS server target. https://github.com/miekg/dns seems to be most popular way to work with DNS.

[1] - https://golang.org/pkg/net/#LookupHost

Thanks,

-Chris

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