generate kubernetes container from modular service #620

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opened 2025-12-03 12:59:29 +01:00 by kiara · 0 comments

kiara commented

2025-12-03 12:59:29 +01:00

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As a Fediversity maintainer,
given that applications use modular services (#623),
I want to generate Kubernetes container from such modular services,
so that we may shift to serving applications at the service level.

implementation notes

c.f. nix-to-kubernetes: kubernetes container from service argv
- also needs to know ports used
nimi can create a container from a modular service, but does not handle metadata for the likes of k8s (and in their defense, this has barely been exposed)
- sample metadata implementation + k8s manifest generation
skipping containers to directly use stuff in nix store
- nix-sidecar
- nix-snapshotter: older
kubernetes concerns:
- specifying (anti) affinity to ensure/prevent co-location
- (one-off) init or (constantly running) sidecar containers
outstanding challenges to facilitate this from modular services

**As** a Fediversity maintainer, **given that** applications use modular services (#623), **I want** to generate Kubernetes container from such modular services, **so that** we may shift to serving applications at the service level. ### implementation notes - c.f. [`nix-to-kubernetes`](https://github.com/DeterminateSystems/nix-to-kubernetes/): kubernetes container from service `argv` - also needs to know [ports used](https://github.com/NixOS/nixpkgs/issues/490640) - [`nimi`](https://discourse.nixos.org/t/portable-rust-based-service-runner-for-the-experimental-modular-services-spec/74338) can create a container from a modular service, but does not handle metadata for the likes of k8s (and in their defense, this has [barely been exposed](https://github.com/NixOS/nixpkgs/issues/490813)) - [sample metadata implementation + k8s manifest generation](https://github.com/KiaraGrouwstra/nixpkgs/pull/new/modular-metadata) - skipping containers to directly use stuff in nix store - [`nix-sidecar`](https://www.socallinuxexpo.org/scale/22x/presentations/docker-was-too-slow-so-we-replaced-it-nix-production/) - [`nix-snapshotter`](https://github.com/pdtpartners/nix-snapshotter): older - kubernetes concerns: - specifying (anti) affinity to ensure/prevent co-location - (one-off) [init](https://kubernetes.io/docs/concepts/workloads/pods/init-containers/) or (constantly running) [sidecar](https://kubernetes.io/docs/concepts/workloads/pods/sidecar-containers/) containers - [outstanding challenges to facilitate this from modular services](https://github.com/NixOS/nixpkgs/issues/428084#issuecomment-3904556062)

kiara added the

type: task

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2025-12-03 12:59:29 +01:00

kiara referenced this issue

2025-12-03 12:59:39 +01:00

applications' NixOS modules use modular services #621

kiara referenced this issue

2025-12-03 12:59:49 +01:00

NixOS modules wrap modular services #622

kiara referenced this issue