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DevOS

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Seeking help and geeking out together on https://github.com/divnix/devos & https://github.com/divnix/digga10 Servers

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19 Oct 2021
@blaggacao:matrix.orgDavid Arnold (blaggacao)I haven't thought about it. Currently the entire thing is only meant / designed for data. But for example, if there is a jsonSchema for systemd jobs (like nomad / k8s), we could indeed generate the respective data structures directly.12:43:28
@blaggacao:matrix.orgDavid Arnold (blaggacao)But I guess the point of the nixos module system is to have a unified config abstraction layer, although that premise is gladfully partially reverted by RFC42, letting upstream config handles shine through a bit.12:44:59
@blaggacao:matrix.orgDavid Arnold (blaggacao)I think RFC42 is a good piece in the corpus of community knowledge to really understand the reach and boundaries of the module system.12:45:51
@blaggacao:matrix.orgDavid Arnold (blaggacao)Undoubtedly, there is a crossing point where the marginal benefit of a unified abstraction falls below the marginal benefit of immediate upstream config data structures.12:47:03
@blaggacao:matrix.orgDavid Arnold (blaggacao)* Undoubtedly, there is a crossing point where the marginal benefit of a unified abstraction falls below the marginal benefit of expressivity of immediate upstream config data structures.12:47:58
@tomberek:matrix.orgtomberekgot some examples?14:38:56
@blaggacao:matrix.orgDavid Arnold (blaggacao) 
...
      staging = let
        lhs = import ./base/default.nix {
          namespace = "staging";
          selfRev = stableSelfRev;
          domain = domain;
        };
      in data-merge.merge (enablePromtail lhs) {
        backend.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
        databaseHA1.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
        databaseHA2.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
        databaseHA3.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
        rabbitHA1.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
      };
      # External need a tcp route to the amqp
      rabbitHA1.Job.TaskGroups = data-merge.update [ 0 ] [{
        Services = data-merge.update [ 0 ] [{
          Tags = data-merge.append [
            "traefik.tcp.routers.erc20-testnet-stable-rabbit.rule=HostSNI(`*`)"
            "traefik.tcp.routers.erc20-testnet-stable-rabbit.entrypoints=amqp"
          ];
        }];
      }];
14:48:58
@blaggacao:matrix.orgDavid Arnold (blaggacao) * 
...
      staging = let
        lhs = import ./base/default.nix {
          namespace = "staging";
          selfRev = stableSelfRev;
          domain = domain;
        };
      in data-merge.merge (enablePromtail lhs) {
        backend.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
        databaseHA1.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
        databaseHA2.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
        databaseHA3.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
        rabbitHA1.Job.Constraints =
          data-merge.append [ (constrainToAwsInstance "i-061eb00a6") ];
      };
      # External need a tcp route to the amqp
      rabbitHA1.Job.TaskGroups = data-merge.update [ 0 ] [{
        Services = data-merge.update [ 0 ] [{
          Tags = data-merge.append [
            "traefik.tcp.routers.erc20-testnet-stable-rabbit.rule=HostSNI(`*`)"
            "traefik.tcp.routers.erc20-testnet-stable-rabbit.entrypoints=amqp"
          ];
        }];
      }];
...
14:49:08
@blaggacao:matrix.orgDavid Arnold (blaggacao)(nomad jobs but should look pretty analog for k8s manifests)14:49:43
@blaggacao:matrix.orgDavid Arnold (blaggacao)Ah you mean for the crossing point of marginal benefits?14:50:21
@blaggacao:matrix.orgDavid Arnold (blaggacao) It's an individual judgment but I'd say a distructive cross repo mkForce/mkOverride is relatively nasty. 14:51:21
@ultranix:matrix.orgultranixfinally trying out deploy-rs today16:09:38
@ultranix:matrix.orgultranixbeen using nixus for almost a year16:09:53
@mars:jupiterbroadcasting.commars

I'm waiting for Nix to stop churning so I can try out the template. I noticed a few things:

  1. The instructions on the devos website for getting started don't work because the example nix-shell invocation refers to the master branch, but devos has no master branch and its default branch is main

  2. Even though I added nrdxp's cachix instance, I had to build Nix, deploy-rs, and nvfetcher from source, which is taking a long time (mostly just for Nix itself, I think)

16:16:36
@kraftnix:matrix.org@kraftnix:matrix.orgthe need to build nix, deploy-rs and nvfetcher is definitely and issue that we should resolve if possible its one of the reasons i dont build devos on my laptop anymore16:19:52
@mars:jupiterbroadcasting.commarsyeah this is building on a Dell ultrabook, so the aluminum case is turning orange and the world's smallest fans are trying to put on an experimental harsh noise concert16:21:15
@mars:jupiterbroadcasting.commarslively and avant-garde, but not the smoothest OOTB experience ;)16:22:25
@mars:jupiterbroadcasting.commarswhy does devos include a custom build of Nix itself?16:22:43
@ultranix:matrix.orgultranix
In reply to @kraftnix:matrix.org
the need to build nix, deploy-rs and nvfetcher is definitely and issue that we should resolve if possible

its one of the reasons i dont build devos on my laptop anymore
why do you need to build them? 		16:33:34
@kraftnix:matrix.org@kraftnix:matrix.orggood question, i haven't looked into _why_ i need to build them, but every so often i do need to do a full build of nix, dprs, and nvfetcher.16:36:27
@mars:jupiterbroadcasting.commarsis the secrets mgmt stuff for devos just whatever is built into deploy-rs, or is it your own thing?16:39:53
@kraftnix:matrix.org@kraftnix:matrix.orgagenix is used for secretd management. 16:40:42
@mars:jupiterbroadcasting.commarsah OK cool 16:40:54
@kraftnix:matrix.org@kraftnix:matrix.org* agenix is used for secretd management. https://devos.divnix.com/secrets.html16:41:05
@mars:jupiterbroadcasting.commarsprofiles are just modules that don't define any new config options? 16:41:06
@kraftnix:matrix.org@kraftnix:matrix.orghave a read through the docs, it shoulf answer many of these questions :)16:41:34
@mars:jupiterbroadcasting.commarsoh God the Nixpkgs documentation uses definition the opposite of the way that I meant it16:43:34
@mars:jupiterbroadcasting.commarswhat's the point of the conceptual distinction between suites and profiles? don't profiles that import other profiles essentially retain all the same properties as other profiles?16:48:58
@ultranix:matrix.orgultranixhow is deploy-rs set up to read home-manager.shared-modules16:50:18
@mars:jupiterbroadcasting.commars
In reply to @ultranix:matrix.org
how is deploy-rs set up to read home-manager.shared-modules

deploy-rs doesn't have to do anything; it's just deploying a NixOS host flake

digga uses fup's hostDefaults.modules to add home-manager to all the host flakes

16:54:23

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