Failed to configure docker for Applications: Unable to determine default interface

He all,

I’ve been using Truenas SCALE since a long while with only two apps installed : NextCloud and mini dlna. All was running quite well since a long time as well. But, don’t know why, few days ago I lost my apps and got an issue with the error message here above (title).

Does somebody have an idea for solving my Truenas trouble ?

Thanks a lot in advance.

I’m on Truenas SCALE Goldeye 25.04.2.6, trying this afternoon to update it to 25.10.2.1, in case of

Did you make any networking changes recently? Often error messages like this are a result of broken network settings.

I’ve had this fault on every boot for some time, fixed by unsetting the pool and setting it again.

No never that made changes

Hi fayelund,

Sorry for my newbie question :), unsetting then setting the pool means detach/attach my main volume ?

no he means on the apps page top right corner click on configuration → unset pool. This will stop the docker service completely. After a few seconds you can re-set the pool, which should restart the docker service

Ah yes ! Sure. Thanks. I’m going to check

It succeed ! Thanks a lot to you guys. Hope it will remain stable, will see.

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Sorry, should have written better. In apps →configuration, unset your pool, and set it again to the same pool as before.

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And @LarsR beat me to it :slight_smile:

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Ah ok. I think this is a bug that can happen when apps data is on slower storage and isn’t ready the first time the system tries to start docker. There was a fix put in at a later point that should resolve this but I forget exactly when that came in–possibly 25.10.X.

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