I'm trying to include $remote_addr or $http_remote_addr on my proxy_pass without success.
The rewrite rule works
location ^~ /freegeoip/ {
rewrite ^ http://freegeoip.net/json/$remote_addr last;
}
The proxy_pass without the $remote_addr works, but freegeoip does not read the x-Real-IP
location ^~ /freegeoip/ {
proxy_pass http://freegeoip.net/json/;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $host;
}
Then, I'm adding the ip to the end of the request, like this:
location ^~ /freegeoip/ {
proxy_pass http://freegeoip.net/json/$remote_addr;
}
but nginx report this error: no resolver defined to resolve freegeoip.net
If the proxy_pass statement has no variables in it, then it will use the "gethostbyaddr" system call during start-up or reload and will cache that value permanently.
if there are any variables, such as using either of the following:
set $originaddr http://origin.example.com;
proxy_pass $originaddr;
# or even
proxy_pass http://origin.example.com$request_uri;
Then nginx will use a built-in resolver, and the "resolver" directive must be present. "resolver" is probably a misnomer; think of it as "what DNS server will the built-in resolver use". Since nginx 1.1.9 the built-in resolver will honour DNS TTL values. Before then it used a fixed value of 5 minutes.
It seems a bit strange that nginx is failing to resolve the domain name at runtime rather than at configuration time (since the domain name is hard coded). Adding a resolver
declaration to the location block usually fixes dns issues experienced at runtime. So your location block might look like:
location ^~ /freegeoip/ {
#use google as dns
resolver 8.8.8.8;
proxy_pass http://freegeoip.net/json/$remote_addr;
}
This solution is based on an article I read a while back - Proxy pass and resolver. Would be worth a read.
If anyone is stll experiencing trouble, for me it helped to move the proxy_pass host to a seperate upstream, so I come up with something like this
upstream backend-server {
server backend.service.consul;
}
server {
listen 80;
server_name frontend.test.me;
location ~/api(.*)$ {
proxy_pass http://backend-server$1;
}
location / {
# this works mystically! backend doesn't...
proxy_pass http://frontend.service.consul/;
}
}
You could also mention your nginx server port
in the proxy_pass uri
. This solved the issue for me.