How to make nginx resolve DNS everytime when doing proxy_pass?

Question

I have nginx/0.7.68 running on my centos box with the following configuration

server
        {
                listen       80;
                server_name ***;
                index index.html index.htm index.php default.html default.htm default.php;

                location / {
                        root   /***;
                        proxy_pass   http://***:8888;
                        index  index.html index.htm;
                }
[...]

The server that my nginx proxy_pass to is a server with dynamic dns, whose ip change frequently. The problem is that nginx seems to cache the ip address of the destination of proxy_pass resulting request to the wrong ip address.

How can I solve this problem?

Answer 1

It's an intriguing question and AFAIK that's not going to work well. You can try to use the upstream module and use the directives for failover to see if it works as a hack.

Answer 2

looking through the nginx source, it does appear nginx is hardcoded to cache resolves for their TTL - what's the TTL on your dynamic dns?