Re: Struggling with a caching substitute server

[Ludovic Courtès]

Pjotr Prins <address@hidden> skribis:

> I am running client and server in exactly the same checked out guix
> repository. Server:
>
>   ./pre-inst-env guix publish -u guix-publisher
>     publishing /gnu/store on 0.0.0.0, port 8080
>
> Client on the same server
>
>   ./pre-inst-env guix package -i hello --dry-run

If ‘guix publish’ and ‘guix package’ run on the same machine, then
nothing will happen: ‘guix publish’ serves what’s in /gnu/store, and
‘guix package’ will resort to substitutes only when something’s missing
from /gnu/store, in which case ‘guix publish’ won’t have it either.

> Now from a different remote machine using my substitute caching server
>
>   ./pre-inst-env guix package -i hello 
> --substitute-urls="http://guix.myserver.org"; --dry-run
>
> keeps on wanting to build the thing from scratch.

Did you authorize the singing key of that server?

> Query from main server:
>
> GET /nix-cache-info
> GET /xgm6wxkja6llvkz8jck95i6cmh3c93yh.narinfo
> GET /w6im8ck36hpjyh9zjmz9mr2vkppfhzid.narinfo
> GET /9wq9z5jq3g691f836lhi0633g26lfl8n.narinfo
>
> Query from remote
>
> GET /nix-cache-info
> GET /x2lhjhbxd5dqmis350gkc352v9z1pr8r.narinfo
> GET /jkxa2ga4x0gqvx6x790anpwhnm7d278w.narinfo
> GET /ic8sabq35jisj5wmi860d85i09qghq1x.narinfo
>
> which suggests the files it wants to fetch are not the same, though the 
> starting point 
> (the checked out guix dir) should be exactly the same. The last commit is the 
> same.

The set of narinfos queried is a function of what’s in the local
/gnu/store (clients only ask about things not already on disk) so it’s
normal that the requests differ.

HTH!

Ludo’.