Rancher running an APP that needs internet access - docker

Question

Rancher v 1.6.10, Docker v 17.06.2-ce
I'm deploying a stack via Rancher UI that contains one of the docker containers that has an app which connects to Dropbox via the internet. But the app isn't able to access the internet.
However, if I don't use rancher and simply use docker-compose up natively, then it all works fine.
The networking that the Rancher creates appears to be the problem I guess.
Can I be advised please?
My docker compose file:
version: '2'
services:
elasticsearch1:
image: docker.elastic.co/elasticsearch/elasticsearch:5.6.3
container_name: es1
environment:
- cluster.name=idc-cluster
- bootstrap.memory_lock=true
- "ES_JAVA_OPTS=-Xms512m -Xmx512m"
- xpack.security.enabled=false
ulimits:
memlock:
soft: -1
hard: -1
mem_limit: 1g
volumes:
- esdata1:/usr/share/elasticsearch/data
ports:
- 9200:9200
networks:
- docker-elk
idcdb:
image: postgres:9.6
ports:
- "5432:5432"
environment:
- POSTGRES_PASSWORD=DriveMe
- POSTGRES_USER=idc
- POSTGRES_DB=idc
volumes:
- pgdata:/var/lib/db
idcredis:
image: redis:4.0
environment:
- ALLOW_EMPTY_PASSWORD=yes
ports:
- '6379:6379'
volumes:
- redisdata:/var/lib/redis
booking-service:
environment:
- PORT=8085
- PROFILE=integration
ports:
- 8085:8085
image: idc/idc-booking-service
depends_on:
- idcdb
- idcredis
notification-service:
environment:
- PORT=8087
- PROFILE=integration
ports:
- 8087:8087
image: idc/idc-notification-service
depends_on:
- idcredis
analytics-service:
environment:
- PORT=8088
- PROFILE=integration
ports:
- 8088:8088
image: idc/idc-analytics-service
depends_on:
- idcredis
- elasticsearch1
kibana:
image: docker.elastic.co/kibana/kibana:5.6.3
environment:
- "ELASTICSEARCH_URL=http://elasticsearch1:9200"
networks:
- docker-elk
volumes:
pgdata: {}
redisdata: {}
esdata1:
driver: local
networks:
docker-elk:
driver: bridge

Answer 1

You should specify the networks while starting docker
--net=host
if this does not solve your problem
sudo gedit /etc/NetworkManager/NetworkManager.conf
comment out the following line:
#dns=dnsmasq
then
sudo restart network-manager

Answer 2

You could use a Rancher LB and add it to your application as follows:
In the stack where you application is you will have to click on Add Service button and select Add a Load Balancer
Then you make sure that where is says Access is set to Public
In the Request Host you will have to add the desired URL such as: mylocal.dev
Then you will have to add the port 80 so it will be accessible from the outside world on port 80
Select the service you want the LB to apply for and the internal application port.
Thats' all :) now you should be able to connect to mylocal.dev from the outside world.