add middleware/hosts (for reading entries from /etc/hosts file)

[zoonderkins]

My settings like this

proxy . 127.0.0.1:5454 {
policy round_robin
fail_timeout 3s
*** lookup custom hosts file (ads block like, 0.0.0.0 ssl.google.com)
spray
protocol https_google
}
cache 160
log stdout
errors stdout

[miekg]

[ Quoting <notifications@github.com> in "[coredns/coredns] How can I read my..." ]

My settings like this ~~~ proxy . 127.0.0.1:5454 { policy round_robin fail_timeout 3s ## lookup custom hosts file (ads block like, 0.0.0.0 ssl.google.com) spray protocol https_google } cache 160 log stdout errors stdout ~~~

What's the question? You want to be able to block specific sites and getting that info from the /etc/hosts file? I think we should do that in a separate middleware, like `hosts` or something that does a lookup in the hosts file first. An actual blocking middleware might also be possible, but a `hosts` middleware seems more useful at the moment, allthough a host file can only deal with a/aaaa and ptr lookups. /Miek

…

-- Miek Gieben

[zoonderkins]

Yap, sorry for my english
I have a list of hosts file with 0.0.0.0 xxx.com
I want it to lookup from hosts first, if match then return 0.0.0.0, else lookup from upstream dns like 8.8.8.8

[zoonderkins]

my solution from now I just use dnsmasq(my hosts file) then forward upstream to coredns

[miekg]

I'll open an issue for having a hosts middleware, seems like a nice addition and maybe someone will have some fun adding it. On 29 May 2017 12:13 pm, "Oo Kang Zheng" <notifications@github.com> wrote: my solution from now I just dnsmasq then forward upstream to coredns — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#678 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAVkW4aj2Bb6yspH_o-94HyKE01SKqbuks5r-qhfgaJpZM4NpA8s> .

[miekg]

Add a new middleware like this is also a good way to get started with coding in CoreDNS

[miekg]

Specifically the middleware should:

• parse and reparse /etc/hosts every x seconds or on change
• probably needs fallthrough support, just like we did in the kubernetes middleware
• hook up the middleware into CoreDNS

[zoonderkins]

example ads block hosts file
https://www.odrive.com/s/fa24307e-b496-4817-9c44-1245d77f8f97-592d3479

[pmoroney]

I worked on this a bit last night.
I pulled a lot of inspiration from the auto backend and copied the host file logic from hosts.go in the net package.
I got it to compile and run, but it seems I have the logic wrong for when to return errors and when to use middleware.NextOrFailure.
I'll read up more about it tonight.

Thank's for suggesting this on twitter, I wanted to get involved and this is a good starting point.

[miekg]

Feel free to put a gist online (or on actual PR) so we can easily discuss the code.

Awesome getting you onboard!

[miekg]

We have the hosts middleware now