Connect multiple containers, nginx and php through fastcgi - docker-compose

Question

I have three containers, mysql, phpfpm and nginx.
When I try to run the localhost:8080 I get this error:
[error] 11#11: *1 connect() failed (111: Connection refused) while connecting to upstream, client: 172.27.0.1, server: _,.
request: "GET / HTTP/1.1", upstream: "fastcgi://172.27.0.3:9000", host: "localhost:8080"
Can anybody help me with this? What do I miss?
Here is my docker-compose.yaml:
version: '3'
services:
php:
build: php
container_name: phpfpm
expose:
- '9002'
- '9000'
depends_on:
- db
volumes:
- /srv/www/mito/app:/var/www/html
- ./dockerlive/logs:/var/log
command: /bin/bash -c "rm -rf /var/run/php && mkdir /var/run/php && rm -rf /run/php && mkdir /run/php && /usr/sbin/php-fpm7.4 -F -R"
nginx:
build: nginx
container_name: webserver
ports:
- '8080:80'
depends_on:
- php
- db
volumes:
- /srv/www/mito/app:/var/www/html
- ./dockerlive/logs:/var/log/nginx
environment:
- NGINX_HOST=localhost
- NGINX_PORT=80
command: /bin/bash -c "nginx -g 'daemon off;'"
db:
build: database
container_name: mysql
ports:
- "3306:3306"
environment:
MYSQL_ALLOW_EMPTY_PASSWORD: 1
MYSQL_DATABASE: mito
and the nginx config:
server {
listen 80;
listen [::]:80;
server_name _;
root /var/www/html;
index index.html index.php;
#error_log /var/log/nginx/mito.localhost-error.log;
#access_log /var/log/nginx/mito.localhost-acces.log;
location / {
try_files $uri $uri/ =404;
}
location ~ \.php$ {
include snippets/fastcgi-php.conf;
#fastcgi_pass unix:/var/run/php/php7.4-fpm.sock;
fastcgi_pass phpfpm:9000;
}
}

Answer 1

I found somewhere a useful idea what I've implemented.
I've added an entry to the nginx and the php volumes:
- php-fpm-socket:/var/run/php
and I've also defined it in the main volumes section without any parameter.