I need to run Pihole in a docker container. Since dockers with a dedicated IP can't talk to the host and vice versa, my Unraid box cannot get DNS resolution. How to resolve?

18 minutes ago, ripeart said:

I need to run Pihole in a docker container. Since dockers with a dedicated IP can't talk to the host and vice versa, my Unraid box cannot get DNS resolution. How to resolve?

It's not a good idea to have Pihole as your DNS for the unRAID server.  

 

In Settings --> Network Settings set the DNS for the unRAID interface to some external DNS such as Google, Cloudflare (these are my DNS settings), etc. or your router IP address (depending on how you have it configured).

 

 

10 minutes ago, Hoopster said:

It's not a good idea to have Pihole as your DNS for the unRAID server.  

Could you please explain why it's not a good idea?

2 minutes ago, ripeart said:

Could you please explain why it's not a good idea?

1. Pihole and/or docker issues means your server has no DNS

2. There are no ads to block when running unRAID though Pihole so it's an unnecessary layer of processing (granted, it's likely to be unnoticeable)

3. If router, server and/or Pihole have a misconfiguration, it could result in DNS loops that don't get resolved

4. You have the problem you mentioned with a custom IP address when Pihole is running as a docker on macvlan

 

Some are, in fact, running their unRAID server through Pihole without issue, but, it is really not necessary.

 

I have Pihole as a docker container for backup purposes, but, I am currently running Pihole on a Raspberry Pi. Either way, the configuration is the same.  Pihole IP address is the specified DNS in my router so all connected clients go through it, but, unRAID bypasses Pihole and goes direct to Cloudflare for DNS.

Thank you, that makes a lot of sense. I changed Unraid to point to 8.8.8.8 for DNS reso, thus no longer have a need for it to try and talk to the pihole container for DNS.

 

Thanks again!