Connection refused (error 502) while adding SSH to the php-fpm - php

Question

I'm using Docker for my Laravel application and now I have to add an SSH connection to the PHP-fpm container to set up Xdebug.
In the PHP docker file in the end if it's added CMD ["/usr/sbin/sshd","-D"] then I'm getting error 502 Bad Gateway.
This is the log:
2023-01-11 00:09:38 2023/01/10 23:09:38 [error] 22#22: *2 connect() failed (111: Connection refused) while connecting to upstream, client: 172.20.0.1, server: 127.0.0.1, request: "GET / HTTP/1.1", upstream: "fastcgi://172.20.0.2:9000", host: "localhost:8000"
Also if I try to make an SSH connection from the CMD, then I'm getting next error:
kex_exchange_identification: Connection closed by remote host
It looks like some collision with the ports, but I'm not sure.
docker-compose.yml
version: '3.8'
services:
server:
build:
context: .
dockerfile: dockerfiles/nginx.dockerfile
ports:
- '8000:80'
volumes:
- ./src:/var/www/html
- ./nginx/nginx.conf:/etc/nginx/conf.d/default.conf:ro
depends_on:
- php
- mysql
php:
build:
context: .
dockerfile: dockerfiles/php.dockerfile
volumes:
- ./src:/var/www/html
- ./php/php-dev.ini:/usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini
mysql:
platform: linux/x86_64
image: mysql:8.0
ports:
- '3306:3306'
env_file:
- ./env/mysql.env
composer:
build:
context: ./dockerfiles
dockerfile: composer.dockerfile
volumes:
- ./src:/var/www/html
artisan:
build:
context: .
dockerfile: dockerfiles/php.dockerfile
volumes:
- ./src:/var/www/html
entrypoint: ["php", "/var/www/html/artisan"]
npm:
image: node:14
working_dir: /var/www/html
entrypoint: ["npm"]
volumes:
- ./src:/var/www/html
php.dockerfile
FROM php:8.1-fpm-alpine
WORKDIR /var/www/html
COPY src .
RUN docker-php-ext-install pdo pdo_mysql
RUN apk add --update linux-headers \
&& apk add --no-cache $PHPIZE_DEPS \
&& pecl install xdebug \
&& docker-php-ext-enable xdebug
RUN apk --update add --no-cache openssh bash \
&& sed -i s/#PermitRootLogin.*/PermitRootLogin\ yes/ /etc/ssh/sshd_config \
&& echo "root:root" | chpasswd \
&& rm -rf /var/cache/apk/* \
&& sed -ie 's/#Port 22/Port 2000/g' /etc/ssh/sshd_config \
&& sed -ri 's/#HostKey \/etc\/ssh\/ssh_host_key/HostKey \/etc\/ssh\/ssh_host_key/g' /etc/ssh/sshd_config \
&& sed -ir 's/#HostKey \/etc\/ssh\/ssh_host_rsa_key/HostKey \/etc\/ssh\/ssh_host_rsa_key/g' /etc/ssh/sshd_config \
&& sed -ir 's/#HostKey \/etc\/ssh\/ssh_host_dsa_key/HostKey \/etc\/ssh\/ssh_host_dsa_key/g' /etc/ssh/sshd_config \
&& sed -ir 's/#HostKey \/etc\/ssh\/ssh_host_ecdsa_key/HostKey \/etc\/ssh\/ssh_host_ecdsa_key/g' /etc/ssh/sshd_config \
&& sed -ir 's/#HostKey \/etc\/ssh\/ssh_host_ed25519_key/HostKey \/etc\/ssh\/ssh_host_ed25519_key/g' /etc/ssh/sshd_config \
&& /usr/bin/ssh-keygen -A \
&& ssh-keygen -t rsa -b 4096 -f /etc/ssh/ssh_host_key
CMD ["/usr/sbin/sshd","-D"]
#RUN sed -i 's/127.0.0.1:9000/0.0.0.0:9000/g' /usr/local/etc/php-fpm.d/www.conf
ngingx.dockerfile
FROM nginx:stable-alpine
WORKDIR /etc/nginx/conf.d
COPY nginx/nginx.conf .
RUN mv nginx.conf default.conf
WORKDIR /var/www/html
COPY src .
ngingx.conf
server {
listen 80;
index index.php index.html;
server_name 127.0.0.1;
root /var/www/html/public;
location / {
try_files $uri $uri/ /index.php?$query_string;
}
location ~ \.php$ {
try_files $uri =404;
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass php:9000;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param PATH_INFO $fastcgi_path_info;
}
}