Issue with nginx config using docker - docker

Question

I'm start doing a little test using docker in order to set up my own server and I have a little bit issues.
I use the nginx-fpm image which have most of the services I need to set up my server.
This is my Dockerfile I did in order to set up a basic server. I built it perfectly without any issues and named it as nginx-custom-server.
Dockerfile
FROM "richarvey/nginx-php-fpm"
ADD /conf/simple-project.conf /etc/nginx/sites-available/simple-project.conf
RUN mkdir /srv/www/
RUN mkdir /LOGS/
RUN ln -s /etc/nginx/sites-available/simple-project.conf /etc/nginx/sites-enabled/simple-project.conf
RUN rm /etc/nginx/sites-enabled/default.conf
CMD ["/start.sh"]
I ran it using the following command via terminal.
docker run --name=server-stack -v /home/ismael/Documentos/docker-nginx/code:/srv/www -v /home/ismael/Documentos/docker-nginx/logs:/LOGS -p 80:80 -d nginx-custom-server:stack
In /srv/www folder I have a simple hello world php. I want make changes in my code on my local machine and sync it with docker container using the shared folder code.
The nginx logs are empty so I don't know what is wrong. I set up logs in my conf but nginx didn't create them so I think there is a problem with the general nginx conf I guess.
Here is the conf I'm using for my hello world. Also I mapped this server name in the hosts of the host machine.
simple-project.conf
server {
listen 0.0.0.0:80;
server_name simple-project.olive.com;
root /srv/www/simple-project/;
location / {
try_files $uri /index.php$is_args$args;
}
location ~ ^/index\.php(/|$) {
# the ubuntu default
fastcgi_pass /var/run/php-fpm.sock:9000;
fastcgi_split_path_info ^(.+\.php)(/.*)$;
include fastcgi_params;
fastcgi_param APPLICATION_ENV int;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param HTTPS off;
}
location ~ \.php$ {
return 404;
}
error_log /LOGS/custom_error.log;
access_log /LOGS/custom_access.log;
}
EDIT : Error when I tried to access to the server inside docker's container.
bash-4.4# wget localhost:80 > /tmp/output.html
--2019-03-27 12:33:11-- http://localhost/ Resolving localhost... 127.0.0.1, ::1 Connecting to localhost|127.0.0.1|:80... failed: Connection refused. Connecting to localhost|::1|:80... failed: Address
not available. Retrying.

Answer 1

From what I can tell, there are two reasons why you can't access the server.
The first is that you don't forward any ports from the container to the host. You should include the -p 80:80 argument to your docker run command.
The second is that you're attempting to listen on what I assume to be the IP of the container itself, which is not static (by default). In the nginx config, you should replace listen 172.17.0.2:80; with listen 0.0.0.0:80;.
With these two modifications in place, you should be able to access your server.
A different approach (but not recommended) would be to start the container in with the --network=host parameter. This way, the host's network is actually visible from within the container. In this scenario, you would only need to set the nginx config to listen on a valid address.
However, if the problem persists, a good approach would be to run docker exec -it {$container_id} bash when the container is running and see if you can access the server from within the container itself. This would mean that the server is running correctly but from other reasons, the port is not being correctly forwarded to the host.