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Help needed with docker networking (alien.top)

submitted 1 year ago by jschwalbe@alien.top to c/homelab@selfhosted.forum

2 comments fedilink hide all child comments

Running multiple containers on a debian host. Debian Host IP = 192.168.1.80 Running adguard on this host from within a docker container. I need to know why other containers cannot access adguard at 192.168.1.80:53.

Here is my docker-compose.yml for adguard:

version: "3.9"
services:
  adguardhome:
    image: adguard/adguardhome
    container_name: adguardhome
    ports:
      - 53:53/tcp
      - 53:53/udp
      - 3000:3000/tcp
#      - 3001:80/tcp
      - 3002:8902/tcp
    volumes:
      - ./conf:/opt/adguardhome/conf
      - ./data:/opt/adguardhome/work
    restart: always
    network_mode: host #bridge = same outcomes

the following commands demonstrate what is and isn't working:

debian$ nslookup google.com 192.168.1.80
[success]
debian$ docker compose exec node-red bash
bash-5.1$ nslookup google.com 192.168.1.80
;; connection timed out; no servers could be reached

but doing the same commands from (for instance) my home assistant container, it works as expected. Difference in the compose files for node red and HA are that node red uses it's own network while HA is on the host network. But I don't think I should need to put every container on the host network, right?

Appreciate any help! Thanks

top 2 comments

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[–] NoCheesecake8308@alien.top 0 points 1 year ago (1 children)

Can you dump the output of docker compose logs adguardhome?

[–] jschwalbe@alien.top 1 points 1 year ago

$ docker network ls
NETWORK ID     NAME                      DRIVER    SCOPE
47d7bd010d65   actual_default            bridge    local
c9afc79390f9   adguard-macvlan           macvlan   local
3a8fbecbed47   adguard_default           bridge    local
fdb88264fc66   bridge                    bridge    local
078b97ad2a50   changedetection_default   bridge    local
2f5d5c4d885e   chrony_default            bridge    local
6ee278839eb5   cloudflared_default       bridge    local
64ef9d8e9078   code-server_default       bridge    local
370b7446a782   dockcheck-web_default     bridge    local
27f8bdb73cdd   docker_default            bridge    local
84feb7866bbc   gas_default               bridge    local
20c5c7d0e41c   host                      host      local
36b43a1c0e41   mariadb_default           bridge    local
7efb8579909c   minecraft_default         bridge    local
582fcfe7ef42   mosquitto_default         bridge    local
80229d3d7fc6   nginx-authentik-network   bridge    local
9a50fa17458f   none                      null      local
76dba8f49616   paperless-ngx_default     bridge    local
2c7172560839   paperless_default         bridge    local
1a5bd74b7982   swirl_default             bridge    local
5fca91da43b4   tasmobackup_default       bridge    local
94789ed7f516   traefik_default           bridge    local
fd6af99c1356   uptime-kuma_default       bridge    local
033da28c9628   water_default             bridge    local
fb05222675d9   webtop_default            bridge    local
1c48df1568d1   zigbee2mqtt_default       bridge    local

lots of stuff!