Nginx-proxy doesn't forward to container exposing port 3001 and rewrites URL to static IP - ruby-on-rails

Question

I got a web application running on Ruby on Rails with SOLR in docker-compose. It exposes port 3001, and I want a subdomain URL than my university possesses (and I have access to the configuration panel where I can only specify the "target", what is the IP, I guess, of my local server on which the web application is running).
I first tried to do this redirection without nginx, but the URL data.chembiosys.de was just redirected to http://static.ip:3001
The app is running though, and is accessible.
So I wanted to try to use nginx as a reverse proxy, but the effect is basically the same:
- I need to specify the port number and the IP of my server in the configuration panel of the domain name of interest
- when I type "data.chembiosys.de" in the browser, it shows the IP and the port number
What I do is that I first create a nginx-proxy network:
sudo docker network create nginx-proxy
Then I start nginx-proxy with docker-compose.yml:
version: "3"
services:
nginx-proxy:
image: jwilder/nginx-proxy
container_name: nginx-proxy
restart: always
ports:
- "80:80"
- "443:443"
volumes:
- /var/run/docker.sock:/tmp/docker.sock:ro
- /home/myhome/Projects/nginx-proxy/conf/my_conf.conf:/etc/nginx/conf.d/my_proxy.conf:ro
whoami:
image: jwilder/whoami
environment:
- VIRTUAL_HOST=whoami.local
networks:
default:
external:
name: nginx-proxy
In the second volume, I copy to the nginx-proxy container the following config file:
server {
listen 80;
server_name http://mystaticip:3001;
client_max_body_size 2G;
return 301 http://data.chembiosys.de$request_uri;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host data.chembiosys.de;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://mystaticip:3001;
}
}
And finally, I run the rails app docker-compose.yml
version: '3'
services:
db:
image: mysql:5.7
container_name: seek-mysql_cbs
restart: always
env_file:
- docker/db.env
volumes:
- seek-mysql-db_cbs:/var/lib/mysql
seek: # The SEEK application
#build: .
image: fairdom/seek:1.7
container_name: seek_cbs
command: docker/entrypoint.sh
restart: always
environment:
RAILS_ENV: production
SOLR_PORT: 8983
NO_ENTRYPOINT_WORKERS: 1
env_file:
- docker/db.env
volumes:
- seek-filestore_cbs:/seek/filestore
- seek-cache_cbs:/seek/tmp/cache
ports:
- "3001:3000"
depends_on:
- db
- solr
links:
- db
- solr
seek_workers: # The SEEK delayed job workers
#build: .
image: fairdom/seek:1.7
container_name: seek-workers_cbs
command: docker/start_workers.sh
restart: always
environment:
RAILS_ENV: production
SOLR_PORT: 8983
env_file:
- docker/db.env
volumes:
- seek-filestore_cbs:/seek/filestore
- seek-cache_cbs:/seek/tmp/cache
depends_on:
- db
- solr
links:
- db
- solr
solr:
image: fairdom/seek-solr
container_name: seek-solr_cbs
volumes:
- seek-solr-data_cbs:/opt/solr/server/solr/seek/data
restart: always
volumes:
seek-filestore_cbs:
driver: local-persist
driver_opts:
mountpoint: /home/myhome/Projects/ChemBioSys/docker_volumes/seek-filestore_cbs
seek-mysql-db_cbs:
driver: local-persist
driver_opts:
mountpoint: /home/myhome/Projects/ChemBioSys/docker_volumes/seek-mysql-db_cbs
seek-solr-data_cbs:
driver: local-persist
driver_opts:
mountpoint: /home/myhome/Projects/ChemBioSys/docker_volumes/seek-solr-data_cbs
seek-cache_cbs:
driver: local-persist
driver_opts:
mountpoint: /home/myhome/Projects/ChemBioSys/docker_volumes/seek-cache_cbs
networks:
default:
external:
name: nginx-proxy
I have the feeling that nginx-proxy is just failing to connect the URL to the app. What an I doing wrong and how to connect the app to the URL with nginx? And also, how to avoid the rewrite of the URL to the IP:port?
P.S. The static IP I got from the SysAdmins is alphanumerical and I see the following warning when the nginx-proxy docker-compose runs:
nginx-proxy | [warn] 30#30: server name "http://pc08.ian.uni-jena.de:3001" has suspicious symbols in /etc/nginx/conf.d/my_proxy.conf:3