Custom Query (2296 matches)

Nginx compiled with v3 support has following signature:

./configure --with-http_v3_module && make -j8
egrep -ao '.,.,.,[01]{34}' objs/nginx
8,4,8,0000111111010111001110111111000110

Nginx compiled without v3 support will have the same signature:

./configure && make -j8
egrep -ao '.,.,.,[01]{34}' objs/nginx
8,4,8,0000111111010111001110101111000110

But nginx compiled with v3 support has different struct ngx_connection_s layout, it has additional 'quic' field - https://trac.nginx.org/nginx/browser/nginx/src/core/ngx_connection.h?rev=58afcd72446ff33811e773f1cabb7866a92a09a0#L153. Thus, if we compile a module for nginx without v3 support and try to load it into nginx with v3 support, the module will be successfully loaded because they have the same versions and signatures, but the module will behave badly due to different structure layouts.

Hello, I'm running nginx on Archlinux.

Hi, I have the following simple configuration:

/ # cat /etc/nginx/conf.d/nginx.conf
server {
    listen 8080;
    server_name $hostname;
    location / {
        root /usr/share/nginx/html;
        index index.html;
        try_files $uri $uri/ /index.html;
    }
    location /api/ {
        error_log  /var/log/nginx/api-error.log debug;
        resolver kube-dns.kube-system.svc.cluster.local valid=10s;
        set $target todo-list-backend-svc.default.svc.cluster.local;
        proxy_pass http://$target;
    }

Which gives me the following error:

/ # nginx -s reload
2023/08/26 11:16:25 [emerg] 60#60: host not found in resolver "kube-dns.kube-system.svc.cluster.local" in /etc/nginx/conf.d/nginx.conf:11
nginx: [emerg] host not found in resolver "kube-dns.kube-system.svc.cluster.local" in /etc/nginx/conf.d/nginx.conf:11

I've checked that "kube-dns.kube-system.svc.cluster.local" can be resolved locally:

/ # nslookup kube-dns.kube-system.svc.cluster.local
Server:		10.96.0.10
Address:	10.96.0.10:53


Name:	kube-dns.kube-system.svc.cluster.local
Address: 10.96.0.10

This is my /etc/resolv.conf:

/ # cat /etc/resolv.conf
nameserver 10.96.0.10
search default.svc.cluster.local svc.cluster.local cluster.local localdomain
options ndots:5

When I remove the "svc.cluster.local" from the DNS name, nginx is reloaded without any issue:

/ # cat /etc/nginx/conf.d/nginx.conf
server {
    listen 8080;
    server_name $hostname;
    location / {
        root /usr/share/nginx/html;
        index index.html;
        try_files $uri $uri/ /index.html;
    }
    location /api/ {
        error_log  /var/log/nginx/api-error.log debug;
        resolver kube-dns.kube-system valid=30s;
        set $target todo-list-backend-svc.default.svc.cluster.local;
        proxy_pass http://$target;
    }
/ # nginx -s reload
2023/08/26 11:20:03 [notice] 67#67: signal process started
/ #

So, what is going wrong here? It looks like resolver is unable to deal with long DNS names.