Connection refused when making curl request inside docker - docker

Question

I have a nginx webserver with docker compose with the following web apps:
example.com
api.example.com
I can curl both sides from outside, but I need to curl from one web page to the other one.
curl example.com -> host not found
curl nginx -> returns exmaple.com app
I tried to set the servername to api.nginx and curling this, but then it says host not found
So how do I have to set the configuration so both apps can communicate?
docker-compose:
version: '2'
services:
### Applications Code Container #############################
applications:
image: tianon/true
volumes:
- ${APPLICATION}:/var/www
### Workspace Utilities Container ###########################
workspace:
build:
context: ./workspace
args:
- INSTALL_XDEBUG=${WORKSPACE_INSTALL_XDEBUG}
- INSTALL_SOAP=${WORKSPACE_INSTALL_SOAP}
- INSTALL_MSSQL=${WORKSPACE_INSTALL_MSSQL}
- INSTALL_NODE=${WORKSPACE_INSTALL_NODE}
- INSTALL_YARN=${WORKSPACE_INSTALL_YARN}
- INSTALL_DRUSH=${WORKSPACE_INSTALL_DRUSH}
- INSTALL_AEROSPIKE=${WORKSPACE_INSTALL_AEROSPIKE}
- INSTALL_V8JS=${WORKSPACE_INSTALL_V8JS}
- COMPOSER_GLOBAL_INSTALL=${WORKSPACE_COMPOSER_GLOBAL_INSTALL}
- INSTALL_WORKSPACE_SSH=${WORKSPACE_INSTALL_WORKSPACE_SSH}
- INSTALL_LARAVEL_ENVOY=${WORKSPACE_INSTALL_LARAVEL_ENVOY}
- INSTALL_DEPLOYER=${WORKSPACE_INSTALL_DEPLOYER}
- INSTALL_LINUXBREW=${WORKSPACE_INSTALL_LINUXBREW}
- INSTALL_MC=${WORKSPACE_INSTALL_MC}
- PUID=${WORKSPACE_PUID}
- PGID=${WORKSPACE_PGID}
- NODE_VERSION=${WORKSPACE_NODE_VERSION}
- YARN_VERSION=${WORKSPACE_YARN_VERSION}
- TZ=${WORKSPACE_TIMEZONE}
dockerfile: "Dockerfile-${PHP_VERSION}"
volumes_from:
- applications
extra_hosts:
- "dockerhost:${DOCKER_HOST_IP}"
ports:
- "${WORKSPACE_SSH_PORT}:22"
tty: true
networks:
- frontend
- backend
### PHP-FPM Container #######################################
php-fpm:
build:
context: ./php-fpm
args:
- INSTALL_XDEBUG=${PHP_FPM_INSTALL_XDEBUG}
- INSTALL_SOAP=${PHP_FPM_INSTALL_SOAP}
- INSTALL_MONGO=${PHP_FPM_INSTALL_MONGO}
- INSTALL_MSSQL=${PHP_FPM_INSTALL_MSSQL}
- INSTALL_ZIP_ARCHIVE=${PHP_FPM_INSTALL_ZIP_ARCHIVE}
- INSTALL_BCMATH=${PHP_FPM_INSTALL_BCMATH}
- INSTALL_PHPREDIS=${PHP_FPM_INSTALL_PHPREDIS}
- INSTALL_MEMCACHED=${PHP_FPM_INSTALL_MEMCACHED}
- INSTALL_OPCACHE=${PHP_FPM_INSTALL_OPCACHE}
- INSTALL_EXIF=${PHP_FPM_INSTALL_EXIF}
- INSTALL_AEROSPIKE=${PHP_FPM_INSTALL_AEROSPIKE}
- INSTALL_MYSQLI=${PHP_FPM_INSTALL_MYSQLI}
- INSTALL_TOKENIZER=${PHP_FPM_INSTALL_TOKENIZER}
- INSTALL_INTL=${PHP_FPM_INSTALL_INTL}
- INSTALL_GHOSTSCRIPT=${PHP_FPM_INSTALL_GHOSTSCRIPT}
- INSTALL_LDAP=${PHP_FPM_INSTALL_LDAP}
- INSTALL_SWOOLE=${PHP_FPM_INSTALL_SWOOLE}
dockerfile: "Dockerfile-${PHP_VERSION}"
volumes_from:
- applications
volumes:
- ./php-fpm/php${PHP_VERSION}.ini:/usr/local/etc/php/php.ini
expose:
- "9000"
depends_on:
- workspace
extra_hosts:
- "dockerhost:${DOCKER_HOST_IP}"
environment:
- PHP_IDE_CONFIG=${PHP_IDE_CONFIG}
networks:
- backend
### PHP Worker Container #####################################
php-worker:
build:
context: ./php-worker
volumes_from:
- applications
depends_on:
- workspace
extra_hosts:
- "dockerhost:${DOCKER_HOST_IP}"
networks:
- backend
### MySQL Container #########################################
mysql:
build:
context: ./mysql
environment:
- MYSQL_DATABASE=${MYSQL_DATABASE}
- MYSQL_USER=${MYSQL_USER}
- MYSQL_PASSWORD=${MYSQL_PASSWORD}
- MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
volumes:
- ${DATA_SAVE_PATH}/mysql:/var/lib/mysql
- ./mysql/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
ports:
- "${MYSQL_PORT}:3306"
networks:
- backend
- frontend
### Redis Container #########################################
redis:
build: ./redis
volumes:
- ${DATA_SAVE_PATH}/redis:/data
ports:
- "6379:6379"
networks:
- backend
### Caddy Server Container ##################################
caddy:
build: ./caddy
volumes_from:
- applications
volumes:
- ${CADDY_CUSTOM_CADDYFILE}:/etc/Caddyfile
- ${CADDY_HOST_LOG_PATH}:/var/log/caddy
- ${DATA_SAVE_PATH}:/root/.caddy
ports:
- "${CADDY_HOST_HTTP_PORT}:80"
- "${CADDY_HOST_HTTPS_PORT}:443"
depends_on:
- php-fpm
networks:
- frontend
- backend
### Adminer Container ####################################
adminer:
build:
context: ./adminer
args:
- INSTALL_MSSQL=${ADM_INSTALL_MSSQL}
ports:
- "${ADM_PORT}:8080"
depends_on:
- php-fpm
networks:
- frontend
- backend
### Laravel Echo Server #######################################
laravel-echo-server:
build:
context: ./laravel-echo-server
volumes:
- ./laravel-echo-server/laravel-echo-server.json:/app/laravel-echo-server.json:ro
ports:
- "${LARAVEL_ECHO_SERVER_PORT}:6001"
links:
- redis
networks:
- frontend
- backend
### Networks Setup ############################################
networks:
frontend:
driver: "bridge"
backend:
driver: "bridge"
### Volumes Setup #############################################
volumes:
mysql:
driver: "local"
percona:
driver: "local"
mssql:
driver: "local"
postgres:
driver: "local"
memcached:
driver: "local"
redis:
driver: "local"
neo4j:
driver: "local"
mariadb:
driver: "local"
mongo:
driver: "local"
minio:
driver: "local"
rethinkdb:
driver: "local"
phpmyadmin:
driver: "local"
adminer:
driver: "local"
aerospike:
driver: "local"
caddy:
driver: "local"
elasticsearch-data:
driver: "local"
elasticsearch-plugins:
driver: "local"

Answer 1

I had to add the extra hosts to the extra_hosts in my php-fpm service:
https://github.com/laradock/laradock/issues/435
php-fpm:
build:
context: ./php-fpm
args:
- INSTALL_XDEBUG=${PHP_FPM_INSTALL_XDEBUG}
- INSTALL_SOAP=${PHP_FPM_INSTALL_SOAP}
- INSTALL_MONGO=${PHP_FPM_INSTALL_MONGO}
- INSTALL_MSSQL=${PHP_FPM_INSTALL_MSSQL}
- INSTALL_ZIP_ARCHIVE=${PHP_FPM_INSTALL_ZIP_ARCHIVE}
- INSTALL_BCMATH=${PHP_FPM_INSTALL_BCMATH}
- INSTALL_PHPREDIS=${PHP_FPM_INSTALL_PHPREDIS}
- INSTALL_MEMCACHED=${PHP_FPM_INSTALL_MEMCACHED}
- INSTALL_OPCACHE=${PHP_FPM_INSTALL_OPCACHE}
- INSTALL_EXIF=${PHP_FPM_INSTALL_EXIF}
- INSTALL_AEROSPIKE=${PHP_FPM_INSTALL_AEROSPIKE}
- INSTALL_MYSQLI=${PHP_FPM_INSTALL_MYSQLI}
- INSTALL_TOKENIZER=${PHP_FPM_INSTALL_TOKENIZER}
- INSTALL_INTL=${PHP_FPM_INSTALL_INTL}
- INSTALL_GHOSTSCRIPT=${PHP_FPM_INSTALL_GHOSTSCRIPT}
- INSTALL_LDAP=${PHP_FPM_INSTALL_LDAP}
- INSTALL_SWOOLE=${PHP_FPM_INSTALL_SWOOLE}
dockerfile: "Dockerfile-${PHP_VERSION}"
volumes_from:
- applications
volumes:
- ./php-fpm/php${PHP_VERSION}.ini:/usr/local/etc/php/php.ini
expose:
- "9000"
depends_on:
- workspace
extra_hosts:
- "dockerhost:${DOCKER_HOST_IP}"
- "example.com:${DOCKER_HOST_IP}"
- "api.example.com:${DOCKER_HOST_IP}"