resolve site hostname inside docker container - docker

Question

Can't resolve site nginx host inside docker nginx (and other in same network) container.
➜ dockerised-php git:(master) ✗ tree .
.
├── code
│   └── index.php
├── docker-compose.yml
├── README.md
└── site.conf
1 directory, 4 files
site.conf:
server {
listen 80;
index index.php index.html;
server_name docker-test.loc;
error_log /var/log/nginx/error.log;
access_log /var/log/nginx/access.log;
root /code;
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;
}
}
docker-compose
version: '2'
services:
web:
image: nginx:latest
ports:
- "8080:80"
volumes:
- ./code:/code
- ./site.conf:/etc/nginx/conf.d/default.conf
networks:
- code-network
php:
image: php:fpm
volumes:
- ./code:/code
networks:
- code-network
networks:
code-network:
docker-test.loc resolving from browser, but
docker exec -it dockerised-php_web_1 bash
nslookup docker-test.loc
# connection timed out; no servers could be reached
outside
➜ ~ nslookup docker-test.loc
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
Name: docker-test.loc
Address: 127.0.0.1
docker container resolver:
➜ ~ docker exec -it dockerised-php_web_1 bash
root#6340952094ed:/# cat /etc/resolv.conf
search Dlink
nameserver 127.0.0.11
options ndots:0
I tried cat "127.0.0.1 docker-test.loc" >> /etc/hosts inside nginx container but it not helps.
What should I do to resolve docker-test.loc inside container?

Answer 1

You can edit docker-compose.yml file to add container_name for web service like that:
version: '2'
services:
web:
image: nginx:latest
ports:
- "8080:80"
container_name: docker-test.loc
volumes:
- ./code:/code
- ./site.conf:/etc/nginx/conf.d/default.conf
networks:
- code-network
php:
image: php:fpm
volumes:
- ./code:/code
networks:
- code-network
networks:
code-network:
Then all container in the code-network can resolve docker-test.loc as IP address of your web-service container in your docker compose.
EDIT
For more than one hostname(virtualhost) in your nginx container you can use external_links like that:
version: '2'
services:
web:
image: nginx:latest
ports:
- "8080:80"
volumes:
- ./code:/code
- ./site.conf:/etc/nginx/conf.d/default.conf
networks:
- code-network
php:
image: php:fpm
volumes:
- ./code:/code
networks:
- code-network
external_links:
- web:docker-test__1.loc
- web:docker-test__2.loc
- web:abcdef.vn
networks:
code-network:
Thanks.