acces docker containers by ip vs port expose - docker

Question

I do have a DOCKER_HOST specified by :
DOCKER_HOST=tcp://g3-docker-1:2375
secured by TLS. On this host I could have quite a view "jboss/wildfly" containers in different configurations and loaded with different apps. They can be started on request by some people for software testing purposes. The following docker-compose is used :
version: '2'
services:
wildfly:
build:
dockerfile: Dockerfile.wildfly
context: .
ports:
- "8080:8080"
depends_on:
- logvolume
- mariadb
volumes_from:
- logvolume
mariadb:
image: mariadb:latest
ports:
- "3307:3307"
environment:
- MYSQL_ROOT_PASSWORD=secret
logvolume:
build:
dockerfile: Dockerfile.logvolume
context: .
volumes:
- /opt/jboss/wildfly/standalone/log:/opt/jboss/wildfly/standalone/log
I am planning to build quite a view containers each one with different preloaded data and different webapps inside "wildfly"
When I start these containers each one is assigned a IP addres inside the _dirname_default network (bridged). Jboss is reachable by the outside world with $DOCKER_HOST:8080 and maria_db is reachable so fine so good ...
But what if I have a couple of this. Do I have to map different ports to the different wildflys or is there another way to access the dockerized wildflys by the outside eg. via the containerid or so ?

Answer 1

I am now using nginx as reverse proxy in order to decide based on the url which wildfly to talk to
This needs an addtional service in docker-compose.yml like this :
reverseproxy:
build:
dockerfile: Dockerfile.nginx
context: .
ports:
- 80:80
depends_on:
- wildfly
and the following nginx.conf:
worker_processes 1;
events { worker_connections 1024; }
http {
sendfile on;
upstream docker-wildfly {
server wildfly:8080;
}
server {
listen 80;
location /wildfly/ {
proxy_pass http://docker-wildfly/;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Host $server_name;
}
}
}
Each wildfly will get its own location