502 bad gateway when access nginx from a docker container - php

Question

I am trying to create a php inside my docker container
However, when I go to the localhost on my browser, I keep getting the 502 bad gateway.
The error log shows
[error] 11#0: *1 connect() failed (111: Connection refused) while connecting to upstream, client: (my IP), server: localhost, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "localhost"
My nginx conf looks like this
server {
listen 80;
server_name jenkins.local;
root /var/www/html;
index index.php;
access_log /var/log/nginx/localhost-access.log;
error_log /var/log/nginx/localhost-error.log;
location / {
try_files $uri $uri/ /index.php?$args;
}
location ~ \.php$ {
try_files $uri =404;
include /etc/nginx/fastcgi_params;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $fastcgi_script_name;
fastcgi_intercept_errors on;
}
}
I am new to docker and PHP so please let me know if I need to provide any other information.

Answer 1

Did you start php-fpm?
Is port 9000 open?
Brief edition
upstream websocketserver {
server localhost:8080;
}
server {
listen 80;
server_name jenkins.local; //Or try localhost;
root /var/www/html;
index index.php;
access_log /var/log/nginx/localhost-access.log;
error_log /var/log/nginx/localhost-error.log;
location / {
proxy_pass http://websocketserver;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto https;
proxy_read_timeout 86400; # neccessary to avoid websocket timeout disconnect
proxy_send_timeout 900s;
proxy_redirect off;
}
location ~ \.php$ {
include snippets/fastcgi-php.conf;
fastcgi_pass unix:/run/php/php7.4-fpm.sock; //Check if your php is 7.4, run php -v
}
}