Help with docker-compose and network modes
reddit / selfhosted

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Trousers_Rippin · 2023-10-23 16:34

When I install ghost and SQL via docker-compose on my QNAP NAS. It
doesn't get a host network IP address but a completely different
address. The installation works locally but will not through my NPM
reverse proxy with cloudflare. I understand why it won't work but can
someone explain to me how I can get the ghost/sql container to use
host networking?

I have lots of other stuff running on my homelab that works self
hosting but they all use the IP of the NAS.

​

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thekrautboy · 2023-10-23 16:58

By using `network_mode: host`

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Trousers_Rippin · 2023-10-23 17:45

Tried that. It works with single containers but is ignored with
multiple apps in a container (sorry, not to good with the terminology
yet).

I'm not sure if its a QNAP NAS container station thing.

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thekrautboy · 2023-10-23 17:53

If you have multiple containers (services) in one compose (a stack)
then you need to set network_mode for each container separately, you
cannot set it globally for all of them.

The Docker documentation explains all of that.

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Trousers_Rippin · 2023-10-23 18:05

Thanks. I have tried network\_mode: host for each service in the stack
and yet it makes a separate bridge network each time.

This is what I'm using.

version: '3.7'
services:
  db:
image: mariadb:latest
restart: unless-stopped
network\_mode: host
environment:
\- TZ=Europe/Stockholm
\- MYSQL\_ROOT\_PASSWORD=\*\*\*\*\*
\- MYSQL\_USER=\*\*\*\*\*
\- MYSQL\_PASSWORD=\*\*\*\*\*
\- MYSQL\_DATABASE=\*\*\*\*\*
ports:
\- 3306:3306
volumes:
\- /share/CACHEDEV1\_DATA/Container/ghost/config/mysql:/var/lib/mysql
\- /etc/localtime:/etc/localtime:ro
labels:
\- com.centurylinklabs.watchtower.enable=true
  app:
image: ghost:latest
restart: unless-stopped
network\_mode: host
environment:
\- TZ=Europe/Stockholm
\- database\_\_client=mysql
\- database\_\_connection\_\_host=\*\*\*\*\*
\- database\_\_connection\_\_user=\*\*\*\*\*
\- database\_\_connection\_\_password=\*\*\*\*\*
\- database\_\_connection\_\_database=\*\*\*\*\*
\- url=http://10.1.1.2:2368
ports:
\- 2368:2368
volumes:
\- /share/CACHEDEV1\_DATA/Container/ghost/config/content:/var/lib/ghos
t/content
\- /etc/localtime:/etc/localtime:ro
depends\_on:
\- db
labels:
\- com.centurylinklabs.watchtower.enable=true

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thekrautboy · 2023-10-23 19:04

> The Docker documentation explains all of that.
>
>
>
> And /r/Docker and /r/Synology both exist.

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Old-Satisfaction-564 · 2023-10-23 19:17

This is the correct format for host networking, also url is definitely
wrong if you proxy the ghost container:

`ports:`
`- target: 80`
`published: 80`
`protocol: tcp`
`mode: host`
`- target: 443`
`published: 443`
`protocol: tcp`
`mode: host`
`- target: 8443`
`published: 8443`
`protocol: tcp`
`mode: host`
`- target: 8080`
`published: 8080`
`protocol: tcp`
`- target: 853`
`published: 853`
`protocol: tcp`