Docker: can't ping through containers


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I can't succed to ping container from another container using its name !

All my containers are in the same 'bridge' network.
When I run 'docker inspect'  command, I see all the containers (sonarr, radarr, bazarr, jellyfin...)
But if I open a console on a container, a 'ping sonarr' returns 'Name does not resolve'


The --name argument is set for all containers.

Let's see dns files in a container:



# Generated DNSv4 entries:
nameserver  # pi-hole docker adress

/etc/hosts       localhost
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters      7677bf67772b

Any help ?

Edited by mika91
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3 minutes ago, shaunmccloud said:

Are you using the default bridge network or did you create your own?  For pinging by name to work you need to create your own.

I use the default one.

I'll try with a custom network (strange that it works with default bridge network, using docker-compose on OMW)



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ok, so I created a new 'my-bridge' network as suggested, and put all my containers in.

And now it's working, I can ping containers using their name.


I guess there is a good reason to explain why DNS it's not working on default bridge... 
But for anyone dealing with reverse proxy (or any containers interaction such as bazarr with sonarr/radarr), the feature is missing
And because unRAID is docker/VM oriented, maybe a better documentation and/or UI (create network, use a default network with dns feature, ...) would be an improvement.


Whatever, the community and forum are very responsive ;)



Edited by mika91
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You're right:


By the way, it explains that docker-compose create it's own bridge network, that's why DNS was working on my previous homelab.

As I said earlier, maybe unRAID team should consider using a custom bridge network as default one

Edited by mika91
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