Q:
Getting this error when accessing /healthz from docker container: 502 Bad Gateway: Connection refused
I have a docker container that I want to communicate to from my host.
I run
docker exec -it curl http://172.17.0.1:80/healthz
to access the node's /healthz page, but keep getting this error:
curl: (7) Failed connect to 172.17.0.1:80; Connection refused
my docker container has this Dockerfile:
FROM ubuntu:14.04
RUN echo "deb http://nl.archive.ubuntu.com/ubuntu/ trusty main restricted" > /etc/apt/sources.list
# Install tools
RUN apt-get update && apt-get install -y apache2 php5-cli mysql-server && rm -rf /var/lib/apt/lists/*
# Defaults to development environment
ENV APACHE_ENVVARS --env-file /etc/apache2/envvars
ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ENV HTTPDUSER www-data
# Apache's httpd.conf
RUN echo "ServerName docker.hostname.com" > /etc/apache2/conf-enabled/hostname.conf
RUN echo "ServerAdmin xxx@example.com" >> /etc/apache2/conf-enabled/hostname.conf
# PHP
RUN echo 'root mysql_user' > /etc/mysql/conf.d/mysql.cnf
RUN echo 'root mysql_pass' > /etc/mysql/conf.d/mysql.cnf
RUN echo 'export PHANTOMJS_BIN="/usr/bin/node"' >> /etc/apache2/conf-enabled/envvars
RUN echo 'export APACHE_RUN_USER=www-data' >> /etc/apache2/conf-enabled/envvars
RUN echo 'export APACHE_RUN_GROUP=www-data' >> /etc/apache2/conf-enabled/envvars
RUN echo 'export APACHE_LOG_DIR=/var/log/apache2' >> /etc/apache2/conf-enabled/envvars
# Add app user and group
RUN useradd -ms /bin/bash -d /var/www -g www-data app
RUN usermod -aG admin www-data
USER app
RUN groupadd -r shadow && groupmod -r shadow && usermod -a -G shadow www-data
# Setup nginx
ADD nginx-default /etc/nginx/sites-enabled/default
# Configure nginx
ADD nginx-proxy-entrypoint.sh /usr/local/bin/nginx-proxy-entrypoint.sh
# nginx configuration files
ADD sites-available /etc/nginx/sites-available/default
ADD sites-available /etc/nginx/sites-available/default.php
ADD sites-available /etc/nginx/sites-available/admin.php
ADD sites-enabled /etc/nginx/sites-enabled
# Apache configuration file
ADD sites-available /etc/apache2/sites-available
# nginx server config file
ADD etc/nginx/conf.d/sites.conf /etc/nginx/conf.d/sites.conf
WORKDIR /var/www/
EXPOSE 80
RUN mkdir -p /var/www/html/ && \
rm -rf /var/lib/apt/lists/* /var/lib/dpkg/* && \
apt-get clean all && \
ln -s /usr/bin/docker.io /usr/local/bin/docker
ENV PATH=/var/run/docker.sock:/var/run/docker.sock $PATH
# docker-compose entrypoint
ENTRYPOINT ["docker-entrypoint.sh"]
CMD ["php-fpm"]
it has these nginx-default and nginx-proxy-entrypoint.sh files:
docker-compose.yml:
version: '2'
services:
app:
image: vhodosilva/nginx-app-builder:v0.1.0
build:
context: ./
dockerfile: ./Dockerfile
ports:
- 8080:80
volumes:
- .:/var/www/html
admin:
image: vhodosilva/nginx-app-builder:v0.1.0
build:
context: ./
dockerfile: ./Dockerfile
volumes:
- ./sites-enabled/admin.php:/usr/local/bin/site-admin.php
- ./sites-available/admin.php:/usr/local/bin/site-admin.php
expose:
- 8080
links:
- app
db:
image: mysql:5.5
environment:
MYSQL_ROOT_PASSWORD: secret
MYSQL_DATABASE: app
MYSQL_USER: appuser
MYSQL_PASSWORD: appuser
ports:
- 33061:3306
volumes:
- ./etc/mysql/conf.d/mysql.cnf:/etc/mysql/conf.d/mysql.cnf
- ./data/db:/var/lib/mysql
phpmyadmin:
image: phpmyadmin/phpmyadmin
links:
- db:mysql
ports:
- 8080:80
php-fpm:
image: php-fpm
build:
context: ./
dockerfile: ./Dockerfile
volumes:
- .:/var/www/html
redis:
image: redis:3.2.0
environment:
- REDIS_MASTER_HOST=redis
expose:
- 6379
supervisor:
image: supervisor:1.0
links:
- phpmyadmin:phpmyadmin
- db:mysql
depends_on:
- app
- db
nginx-proxy-entrypoint.sh
#!/bin/bash
# Starts a new container with nginx running
#
# If no arguments are provided, will start the default nginx image.
#
# If the `--proxy-port` argument is provided, it will start a new container
# but this container will run nginx on port X (default: 80)
#
# If the `--container-name` argument is provided, it will start a new container
# and start a new nginx container. This container's logs will be displayed
# in the logs of the new nginx container, and its logs will be displayed
# in the logs of the main container.
#
# Requires APACHE_RUN_USER/APACHE_RUN_GROUP and USER/GROUP specified
# (See docker-compose.yml for an example)
#
# Optional ENV vars:
# - APACHE_ENVVARS
cmd="nginx -g 'daemon off;"
if [[ $1 = "--proxy-port" ]]; then
cmd="$cmd -g 'daemon on;'"
fi
if [[ $1 = "--container-name" ]]; then
cmd="$cmd -P $PORT_80_TCP_PORT; --nginx-config /etc/nginx/conf.d/sites.conf; --env-file /etc/nginx/envvars;";
fi
if [[ $1 = "--env-file" ]]; then
APACHE_ENVVARS="/etc/apache2/envvars"
fi
docker run \
--rm \
--name "$CONTAINER_NAME" \
--user "$APACHE_RUN_USER" \
--group "$APACHE_RUN_GROUP" \
--pidfile /run/nginx.pid \
--net=host \
--net=container:${CONTAINER_NAME}_web \
-v "${APACHE_ENVVARS}:/etc/apache2/envvars:/etc/apache2/envvars" \
--cap-add NET_ADMIN \
-p "${PORT_80_TCP_PORT}:80" \
${cmd} \
-d nginx:latest
I tried updating the script and docker-compose, but no luck.
Any idea why this isn't working?
A:
I also encountered this problem when I used nginx container in docker-compose. It is a problem with the default nginx configuration which was set by docker on my MacOS. This could
