Docker link to connect nginx and php containers - docker

Question

I tried to learn a (even though a bit outdated) form of linking containers. I created an NGINX and PHP container, which should get linked. Everything runs on my local machine.
Dockerfile NGINX
FROM ubuntu:16.04
MAINTAINER Sebastian Scharf
# Install NGINX
RUN apt-get update && apt-get install -y nginx \
# Clean after apt-get
&& apt-get clean \
## remove content from apt/lists and var/tmp
&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
## set deamon off
&& echo "daemon off;" >> /etc/nginx/nginx.conf
ADD default /etc/nginx/sites-available/default
# forward request and error logs to docker log collector
RUN ln -sf /dev/stdout /var/log/nginx/access.log \
&& ln -sf /dev/stderr /var/log/nginx/error.log
CMD ["nginx"]
Dockerfile PHP
FROM ubuntu:16.04
MAINTAINER Sebastian Scharf
RUN apt-get update \
&& apt-get install -y locales \
&& locale-gen en_US.UTF-8
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8
RUN apt-get update \
&& apt-get install -y curl zip unzip git software-properties-common \
&& add-apt-repository -y ppa:ondrej/php \
&& apt-get update \
&& apt-get install -y php7.0-fpm php7.0-cli php7.0-mcrypt php7.0-gd php7.0-mysql \
php7.0-pgsql php7.0-imap php-memcached php7.0-mbstring php7.0-xml php7.0-curl \
&& php -r "readfile('http://getcomposer.org/installer');" | php -- --install-dir=/usr/bin/ --filename=composer \
&& mkdir /run/php \
&& apt-get remove -y --purge software-properties-common \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
ADD php-fpm.conf /etc/php/7.0/fpm/php-fpm.conf
ADD www.conf /etc/php/7.0/fpm/pool.d/www.conf
EXPOSE 9000
CMD ["php-fpm7.0"]
NGINX CONFIG
server {
listen 8080 default_server;
root /var/www/html/public;
index index.html index.htm index.php;
server_name _;
charset utf-8;
location = /favicon.ico { log_not_found off; access_log off; }
location = /robots.txt { log_not_found off; access_log off; }
location / {
try_files $uri $uri/ /index.php$is_args$args;
}
location ~ \.php$ {
include snippets/fastcgi-php.conf;
fastcgi_pass php:9000;
}
error_page 404 /index.php;
location ~ /\.ht {
deny all;
}
}
When I call localhost:8080, I get the error: This page isn't working (localhost didn't send any data). I was expecting to see a test file.
This is how I started the containers and linked them:
docker run -d --name=myphp -v $(pwd)/application:/var/www/html retronexus/php:0.1.0
docker run -d --link=myphp:php -p 8080:80 -v $(pwd)/application:/var/www/html retronexus/nginx:0.2.0

Answer 1

Nginx in your container listens on port 8080, but you are binding port 80 from the container to 8080 on the host. Switch to binding 8080 from the container.
docker run -d \
--link=myphp:php \
-p 8080:8080 \
-v $(pwd)/application:/var/www/html \
retronexus/nginx:0.2.0
See here for more details: https://docs.docker.com/config/containers/container-networking/#published-ports