Network IP address for docker compose - docker

Question

tl;dr I want every container in this stack to use the same IP & MAC address and be on my local network but need help on how to
For starters I'm new to docker and docker-compose. I made a docker-stack for my Plex Servers (three of them, one for movies by general categories/tv-shows, music, and holidays) with each one having its own IP address & MAC on my local network and now I want to make a second stack for some of my media management tools but this time I'd like the whole stack to use one IP address and MAC address but I haven't been able to figure out how to do it correctly/so it works
This is running on a QNAP NAS (TVS1282v3/QTS) but I am working through the CLI as I leaned that if I do a docker-compose through container station that it won't create the network for me
version: '2.4'
services:
Sonarr:
image: linuxserver/sonarr
container_name: Sonarr
environment:
- TZ=AMERICA/Denver
- name= Sonarr
volumes:
- /share/MediaManagement/Sonarr/config:/config:rw
- /share/MediaManagement/rip:/rip:rw
- /share/Plex:/Plex:rw
ports:
- 8989:8989
restart: unless-stopped
Radarr:
image: linuxserver/radarr
container_name: Radarr
environment:
- TZ=AMERICA/Denver
- name= Radarr
volumes:
- /share/MediaManagement/Radarr/config:/config:rw
- /share/MediaManagement/rip:/rip:rw
- /share/Plex:/Plex:rw
ports:
- 7878:7878
restart: unless-stopped
Lidarr:
image: linuxserver/lidarr
container_name: Lidarr
hostname: Lidarr
environment:
- TZ=AMERICA/Denver
- name= Lidarr
volumes:
- /share/MediaManagement/Lidarr/config:/config:rw
- /share/MediaManagement/rip:/rip:rw
- /share/Plex:/Plex:rw
ports:
- 8686:8686
restart: unless-stopped
networks:
qnet-static:
ipv4_address: 192.168.2.100
mac_address: 05:4A:AA:08:51:43
networks:
qnet-static:
driver: qnet
ipam:
driver: qnet
options:
iface: "eth0"
config:
- subnet: 192.168.2.0/23
gateway: 192.168.2.1
I have also tried it like how it was set up in my Plex compose file where I put
services:
NameOfService:
mac_address: 05:4A:AA:08:51:43
networks:
qnet-static:
ipv4_address: 192.168.2.100
....
networks: ##At the end, not in each service##
qnet-static:
driver: qnet
ipam:
driver: qnet
options:
iface: "eth0"
config:
- subnet: 192.168.2.0/23
gateway: 192.168.2.1
in each service but only the first container worked....
I also tried this at one point but still no luck/ it's syntax is wrong
networks:
qnet-static:
driver: qnet
ipam:
driver: qnet
options:
iface: "eth0"
config:
- subnet: 192.168.2.0/23
gateway: 192.168.2.250
ipv4_address: 192.168.2.100
mac_address: 05:4A:AA:08:51:43
Any help would be appreciate it as I am probably just missing a minor piece

Answer 1

Delete absolutely all of the networks: settings in the file. Don't try to manually assign IP address to containers or configure their MAC addresses.
Your containers will be accessible on your host's IP address, using the first ports: number for each. As far as other hosts on your network are concerned, the processes in containers will be indistinguishable from other services not running in containers.
You also do not need to manually set container_name: or hostname: in most circumstances. There are additional details of the Compose networking environment in Networking in Compose in the Docker documentation, though this mostly focuses on connections between containers. You usually don't need to think about the container-private IP address or (especially) the artificial MAC address within the container network environment.