dmitryfillo / nginx-proxy-pitfalls Goto Github PK
View Code? Open in Web Editor NEWI noticed that many people can be confused about how nginx proxy works so this repository was emerged
I noticed that many people can be confused about how nginx proxy works so this repository was emerged
When a variable is used in proxy_pass
directive, the location header is not longer adjusted. This causes the value coming from backend to make its way back to client. To get around this, simply set proxy_redirect
.
This will not fix up location redirect:
location = /proxy/ {
set $endpoint proxy.com;
resolver 8.8.8.8 valid=10s;
proxy_pass https://$endpoint/;
}
This will:
location = /proxy/ {
set $endpoint proxy.com;
resolver 8.8.8.8 valid=10s;
proxy_pass https://$endpoint/;
proxy_redirect https://$endpoint/ /;
}
You can define proxy_redirect
on server context if used in multiple locations.
This a single line in docs that mention it:
The default parameter is not permitted if proxy_pass is specified using variables.
Based on my own research, unfortunately it does not seem to be possible to force dns lookup for upstream
https://nginx.org/en/docs/http/ngx_http_upstream_module.html
Dynamically configurable group with periodic health checks is available as part of our commercial subscription:
Which allows
upstream dynamic {
zone upstream_dynamic 64k;
server backend1.example.com weight=5;
server backend2.example.com:8080 fail_timeout=5s slow_start=30s;
server 192.0.2.1 max_fails=3;
server backend3.example.com **resolve**;
server backend4.example.com service=http resolve;
server backup1.example.com:8080 backup;
server backup2.example.com:8080 backup;
}
Additionally, the following parameters are available as part of our commercial subscription:
resolve
monitors changes of the IP addresses that correspond to a domain name of the server, and automatically modifies the upstream configuration without the need of restarting nginx (1.5.12). The server group must reside in the shared memory.
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