4 ms·

Thank you for this, it's a decent start for me personally. I was previously using the DNS director in Varnish 3.x to do this which was removed in 4.x. The longe

by corobo 11y ago

Thank you for this, it's a decent start for me personally. I was previously using the DNS director in Varnish 3.x to do this which was removed in 4.x. The longer time goes on the more risk it is to be running older software so this has been a great help. Oddly enough I'd never really considered nginx for the job despite using it to reverse proxy elsewhere. Sometimes you just need a poke in the right direction :) Now I just need to figure a way to specify *.internaldomain so that nginx resolves www.example.com.internaldomain - where www.example.com is grabbed from the requested Host: header

Tenzer 11y ago
It's good to hear it was of use to somebody :) I know you can use a map in Nginx to do what you ask for, as long as you have a list of domains already: http://nginx.org/en/docs/http/ngx_http_map_module.html#map http://nginx.org/en/docs/http/ngx_http_map_module.html#map. I can only imagine it also being possible to make fully dynamic, I just don't have a clear way of doing it in mind right now.
- corobo 11y ago
  The sibling comment to this pointed out the $host variable. I imagine something along the line of proxy_pass http://$host.internaldomain; http://$host.internaldomain; or something on that line. I'll have to look into it further :)
- sprobertson 11y ago
  Lua + Redis is a nice way to do this, I have a small project https://github.com/spro/simon https://github.com/spro/simon that does dynamic routing and load balancing based on Hostname -> IP:Port sets in Redis. Adding a new route is as simple as: sadd backends:hnapi.dev 192.168.0.42:10555
  - Tenzer 11y ago
    Neat! I want to get started on some Lua scripting as well, probably first to just get a bunch of metrics out of Nginx via StatsD. There's access to a whole bunch of numbers via Lua that you otherwise can't get out from the stub_status page.
tombozi 11y ago
You can use the $host variable See: http://nginx.org/en/docs/http/ngx_http_core_module.html#var_host http://nginx.org/en/docs/http/ngx_http_core_module.html#var_... And: http://stackoverflow.com/a/15414811 http://stackoverflow.com/a/15414811 Always be careful with user input though.
- corobo 11y ago
  well damn that's such a simple solution if that variable works in proxy_pass.. One of those "How did I miss that?" solutions Of course rigorous testing before going live, but it gives options. I love options :)

by corobo 11y ago

Tenzer 11y ago

It's good to hear it was of use to somebody :) I know you can use a map in Nginx to do what you ask for, as long as you have a list of domains already: http://nginx.org/en/docs/http/ngx_http_map_module.html#map http://nginx.org/en/docs/http/ngx_http_map_module.html#map. I can only imagine it also being possible to make fully dynamic, I just don't have a clear way of doing it in mind right now.

corobo 11y ago
The sibling comment to this pointed out the $host variable. I imagine something along the line of proxy_pass http://$host.internaldomain; http://$host.internaldomain; or something on that line. I'll have to look into it further :)
sprobertson 11y ago
Lua + Redis is a nice way to do this, I have a small project https://github.com/spro/simon https://github.com/spro/simon that does dynamic routing and load balancing based on Hostname -> IP:Port sets in Redis. Adding a new route is as simple as: sadd backends:hnapi.dev 192.168.0.42:10555
- Tenzer 11y ago
  Neat! I want to get started on some Lua scripting as well, probably first to just get a bunch of metrics out of Nginx via StatsD. There's access to a whole bunch of numbers via Lua that you otherwise can't get out from the stub_status page.

tombozi 11y ago

You can use the $host variable See: http://nginx.org/en/docs/http/ngx_http_core_module.html#var_host http://nginx.org/en/docs/http/ngx_http_core_module.html#var_... And: http://stackoverflow.com/a/15414811 http://stackoverflow.com/a/15414811 Always be careful with user input though.

corobo 11y ago
well damn that's such a simple solution if that variable works in proxy_pass.. One of those "How did I miss that?" solutions Of course rigorous testing before going live, but it gives options. I love options :)