Issue
Im very new to nginx and NodeJS. I'm trying to configure my nginx server on a Fedora 26 machine as a reverse proxy for an express server on port 3000. I followed every step but for some reason I have a 504 Gateway Time-out error.
This is my /etc/nginx/nginx.conf file:
# For more information on configuration, see:
# * Official English Documentation: http://nginx.org/en/docs/
# * Official Russian Documentation: http://nginx.org/ru/docs/
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
http {
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Load modular configuration files from the /etc/nginx/conf.d directory.
# See http://nginx.org/en/docs/ngx_core_module.html#include
# for more information.
include /etc/nginx/conf.d/*.conf;
include /etc/nginx/sites-enabled/*;
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name _;
root /usr/share/nginx/html;
# Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf;
location / {
try_files $uri /index.html;
}
error_page 404 /404.html;
location = /40x.html {
}
error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
}
# Settings for a TLS enabled server.
#
# server {
# listen 443 ssl http2 default_server;
# listen [::]:443 ssl http2 default_server;
# server_name _;
# root /usr/share/nginx/html;
#
# ssl_certificate "/etc/pki/nginx/server.crt";
# ssl_certificate_key "/etc/pki/nginx/private/server.key";
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 10m;
# ssl_ciphers PROFILE=SYSTEM;
# ssl_prefer_server_ciphers on;
#
# # Load configuration files for the default server block.
# include /etc/nginx/default.d/*.conf;
#
# location / {
# }
#
# error_page 404 /404.html;
# location = /40x.html {
# }
#
# error_page 500 502 503 504 /50x.html;
# location = /50x.html {
# }
# }
}
As you can see, I created the sites-available folder and then did the link in sites-enabled, which are included.
Inside sites-available I have a file with this:
# the IP(s) on which your node server is running. I chose port 3000.
upstream musiciansdb {
server 127.0.0.1:3000;
keepalive 8;
}
# the nginx server instance
server {
listen 0.0.0.0:80;
server_name musiciansdb.com musiciansdb;
access_log /var/log/nginx/musiciansdb.log;
# pass the request to the node.js server with the correct headers
# and much more can be added, see nginx config options
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy true;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_pass http://musiciansdb.com/;
proxy_redirect off;
}
}
Status of the nginx:
● nginx.service - The nginx HTTP and reverse proxy server
Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
Active: active (running) since Fri 2017-11-03 11:19:17 UTC; 2s ago
Process: 937 ExecReload=/bin/kill -s HUP $MAINPID (code=exited, status=0/SUCCESS)
Process: 981 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
Process: 980 ExecStartPre=/usr/sbin/nginx -t (code=exited, status=0/SUCCESS)
Process: 979 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited, status=0/SUCCESS)
Main PID: 982 (nginx)
Tasks: 2 (limit: 4915)
CGroup: /system.slice/nginx.service
├─982 nginx: master process /usr/sbin/nginx
└─983 nginx: worker process
Nov 03 11:19:17 myserver.localdomain systemd[1]: Starting The nginx HTTP and reverse proxy server...
Nov 03 11:19:17 myserver.localdomain nginx[980]: nginx: [warn] could not build optimal types_hash, you should increase either types_hash_max_size: 2048 or types_hasNov 03 11:19:17 myserver.localdomain nginx[980]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
Nov 03 11:19:17 myserver.localdomain nginx[980]: nginx: configuration file /etc/nginx/nginx.conf test is successful
Nov 03 11:19:17 myserver.localdomain nginx[981]: nginx: [warn] could not build optimal types_hash, you should increase either types_hash_max_size: 2048 or types_hasNov 03 11:19:17 myserver.localdomain systemd[1]: nginx.service: Failed to read PID from file /run/nginx.pid: Invalid argument
Nov 03 11:19:17 myserver.localdomain systemd[1]: Started The nginx HTTP and reverse proxy server.
netstat -lntp|grep 3000
tcp6 0 0 :::3000 :::* LISTEN 3524/node
curl http://127.0.0.1:3000/ responds with the html of my app
I already disabled SElinux.
I restarted the nginx server after every configuration, even restarted the machine. If I go directly to the port 3000 the web app is there.
What am I missing?
Thanks
Solution
This seems to be the bad line.
proxy_pass http://musiciansdb.com/;
When you are creating an upstream backend in nginx, you must refer to it as the same name later.
You have:
upstream musiciansdb {
server 127.0.0.1:3000;
keepalive 8;
}
You need to proxy to this backend with this line (without .com):
proxy_pass http://musiciansdb;
Otherwise you are trying to access musiciansdb.com (from outside, on the 80 port, as a client browser would).
Also note that serverfault.com is the better site for system administration questions.
Answered By - edgars Answer Checked By - Gilberto Lyons (WPSolving Admin)