[Nix-dev] Declarative containers are not updated after creation

[Danylo Hlynskyi]

You have to restart container for changes to apply.

Also, check second part of
http://lists.science.uu.nl/pipermail/nix-dev/2017-March/023069.html

Answering your question: the cause is because of an error in
switch-to-configuration.pl script

2017-03-31 0:35 GMT+03:00 Guido Witmond <nixdev at wtmnd.nl>:

> Hi All,
>
> I'm reasonably new to Nix, I have a server running NixOs with caddy and
> transmission. Now I'm creating a declarative container to run Postfix
> and Dovecot to keep the user-namespace separate from the host.
>
> I've noticed that the container get started and both postfix and dovecot
> get started at 'nixos-rebuild test'. So far so good.
>
> Now when I change the configuration and run rebuild-test again, nothing
> happens. The changes don't get propagated to the container.
>
> In fact, when taking out the complete container-specification from my
> configuration.nix file, the container - and postfix and dovecot in it
> keep running.
>
> I'd expect that the inside of the declarative container be updated
> during nixos-rebuild test.
>
>
> Simplest test case:
>
> configuration.nix:
>     containers."test" = {
>       autoStart = true;
>       config =
>         { config, pkgs, ... }: {
>           services.transmission.enable = true;
>         };
>     };
>
> # nixos-rebuild test -I nixpkgs=/home/guido/nixpkgs/
>
> The nixpks is a clone of github.com/NixOS/nixpkgs.git at commit
> 955b79f4 (Sun Mar 26 17:12:13 2017 +0200) and the channel is
> https://nixos.org/channels/nixos-16.09
>
> To test: uncomment the transmission service and rebuild. The process
> remains running. I expect it to get stopped.
>
> Then delete the whole 'containers.test' section and rebuild again. The
> entire container keeps running while I expect it gets stopped.
>
>
>
> What could be the cause that the container won't get updated?
> What log files / systemd journals should I check for errors?
>
> Any help is appreciated.
>
> Regards,
> Guido Witmond.
>
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>
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