Host header in upstream requests

Server NGINX
1

Hi,

We are using nginx for load balancing dynamically discovered upstream
endpoints. We are in need to attach upstream hostname as header Host in
upstream requests. For example below is my existing conf extract.

upstream products {
server hostname1:port1;
server hostname2:port2;
}
server {
location /products {
proxy_pass http://products
}
}

All requests are load balanced and working fine. Now we are in need to
add
http header “Host: hostnameX” (ex: hostname1 or hostname2, not its IP)
in
all requests to upstream. How can we get this done in nginx?

Regards

2

Use variables list to determine what is available to you:
Alphabetical index of variables

B. R.

On Sat, Mar 14, 2015 at 10:12 PM, Sapient N. [email protected]

3

Already tried $upstream_addr which unfortunately gives IP:port instead
of
hostname:port. My upstream needs hostname listed in conf instead of IP

Posted at Nginx Forum:

4

I don’t think that something other than manual address-hostname pairs
maintainance can help you

map $upstream_addr $upstream_hostname {
10.0.0.1:80 hostname1;
10.0.0.2:80 hostname2;
}
…
proxy_set_header Host $upstream_hostname;

15.03.15 17:19, sapientcloud пишет:

Already tried $upstream_addr which unfortunately gives IP:port instead of
hostname:port. My upstream needs hostname listed in conf instead of IP

Posted at Nginx Forum:
Re: Host header in upstream requests

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Dmitry Pryadko