Docker-compose does not start containers - docker

Question

I'm new with docker-compose. I have a problem when I use the command "docker-compose up -d" to start a multi-container application what should start the containers with the status "up" but all the time a execute the command the status is "Exit", I'm not sure if I'm doing something wrong, this is my docker-compose.yml file
version: '3'
services: catalog:
image: ciscatalog
hostname: catalogHost
command: hostname
volumes:
- /home/docker:/opt/host
container:
image: dis/ciscontainer
hostname: containerHost
command: hostname
volumes:
- /home/docker:/opt/host
inbound:
image: dsi/cisinbound
hostname: inboundHost
depends_on:
- catalog
links:
- catalog
command: hostname
volumes:
- /home/docker:/opt/host
outbound:
image: dsi/cisoutbound
hostname: outboundHost
depends_on:
- catalog
links:
- catalog
command: hostname
volumes:
- /home/docker:/opt/host
example run:
root#docker1:/home/docker/DSI# docker-compose scale catalog=3 container=4 inbound=1 outbound=1
Creating and starting dsi_catalog_1 ... done
Creating and starting dsi_catalog_2 ... done
Creating and starting dsi_catalog_3 ... done
Creating and starting dsi_container_1 ... done
Creating and starting dsi_container_2 ... done
Creating and starting dsi_container_3 ... done
Creating and starting dsi_container_4 ... done
Creating and starting dsi_inbound_1 ... done
Creating and starting dsi_outbound_1 ... done
root#docker1:/home/docker/DSI# docker-compose up -d
Starting dsi_container_4
Starting dsi_catalog_3
Starting dsi_catalog_1
Starting dsi_container_3
Starting dsi_catalog_2
Starting dsi_container_1
Starting dsi_outbound_1
Starting dsi_inbound_1
Starting dsi_container_2
root#docker1:/home/docker/DSI# docker-compose ps
Name Command State Ports
-------------------------------------------
dsi_catalog_1 hostname Exit 0
dsi_catalog_2 hostname Exit 0
dsi_catalog_3 hostname Exit 0
dsi_container_1 hostname Exit 0
dsi_container_2 hostname Exit 0
dsi_container_3 hostname Exit 0
dsi_container_4 hostname Exit 0
dsi_inbound_1 hostname Exit 0
dsi_outbound_1 hostname Exit 0
Please, can anybody help me? docker-compose version 1.13.

Answer 1

I think I got it: you are overriding the command you give in the dockerfile because you have this line in each of the services
command: hostname
so the only command you give is "hostname", which is actually what is run.
If you run an image with docker, you are probably running a completely different command!
If this is a linux based image, 'hostname' will just print the hostname and then exit. So then the command is stopped which logically will result in a stopped container (exit 0)
Remove the command-override so the containers actually run their respective commands.